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FS370
User Manual
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Liebert FS370 User Manual

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PRODUCT
POWER PROTECTION
Series 600T™ UPS
Multi-Module Three Phase 65 kVA to 750 kVA; 60 Hz
Operation & Maintenance
Manual
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TABLE OF CONTENTS
2.2.3 BatteryChargingCircuit.............................................................17
3.1 DisplayScreenandOperatorControls .................................................23
3.1.2 Monitor/MimicDisplayScreen........................................................31
3.1.5 SystemConfigurationScreens ........................................................48
3.1.6 AlarmLimitSettingsScreen..........................................................55
3.1.7 LoadTransferProceduresScreen......................................................57
3.1.8 Start-UpProceduresScreen...........................................................58
3.1.9 ShutdownProceduresScreen .........................................................60
3.1.11 MeterCalibrationScreen ............................................................65
3.1.12 BatteryEqualizeScreen .............................................................66
3.1.13 AlarmandStatusMessages...........................................................67
3.1.14 CommunicationInterfaces ...........................................................75
1.0 INTRODUCTION
1.1 System Description . . . ..............................................................3
1.2 Reliability . .......................................................................7
1.3 Safety Precautions ..................................................................8
1.4 Modes of Operation . . . ..............................................................9
1.4.1 Normal(LoadonUPS)...............................................................9
1.4.2 InputPowerFailure..................................................................9
1.4.3 Recharge..........................................................................9
1.4.4 Overload ..........................................................................9
1.4.5 Redundant . . . ......................................................................9
1.4.6 Bypass(Internal)....................................................................9
1.4.7 MaintenanceBypass.................................................................9
1.4.8 Off-Battery ........................................................................9
1.5 Operator Controls .................................................................10
1.6 Options..........................................................................12
2.0 THEORY OF OPERATION
2.1 General Component Descriptions . ....................................................13
2.2 Detailed Component Descriptions. ....................................................15
2.2.1 Controls..........................................................................15
2.2.2 Rectifier/Charger...................................................................16
2.2.4 Inverter ..........................................................................18
2.2.5 StaticBypass......................................................................19
2.2.6 Redundant Mode ...................................................................22
3.0 OPERATION
3.1.1 MasterMenuScreen................................................................29
3.1.3 Walk-InDisplayScreen..............................................................40
3.1.4 StatusReportsScreens ..............................................................41
3.1.10 Battery Time Screen (Module Only) ....................................................62
3.2 Modes of Operation . . . .............................................................78
3.2.1 LoadOnBypass ...................................................................78
3.2.2 OKToTransfer....................................................................79
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3.2.3 MomentaryOverloads ..............................................................81
3.2.4 InputPowerFailure(LoadOnBattery).................................................82
3.2.5 OneModuleOff-Line...............................................................83
3.2.6 OffBattery .......................................................................84
3.2.7 Emergency Modules Off . ...........................................................85
3.2.8 EmergencyPowerOff ..............................................................86
3.2.9 SystemShutdown..................................................................87
3.2.10 MaintenanceBypass................................................................88
3.3 ManualProcedures................................................................ 90
3.3.1 Start-UpProcedure.................................................................91
3.3.2 LoadTransferProcedures............................................................97
3.3.3 ShutdownProcedures...............................................................99
3.4 Automatic Operations ............................................................ 103
3.4.1 Overloads(WithoutTransfer)........................................................103
3.4.2 AutomaticTransferstoBypass.......................................................104
3.4.3 AutomaticRetransferstoUPS.......................................................104
3.4.4 Automatic Module Off-Line.........................................................105
3.4.5 Automatic Emergency Modules Off...................................................105
4.0 MAINTENANCE
4.1 Safety Precautions ............................................................... 106
4.2 LiebertCustomerServiceandSupport ............................................... 108
4.3 Routine Maintenance ............................................................. 109
4.3.1 RecordLog......................................................................109
4.3.2 AirFilters.......................................................................109
4.3.3 BatteryMaintenance ..............................................................110
4.3.4 TorqueRequirements..............................................................115
4.4 Detection of Trouble ............................................................. 115
4.5 ReportingaProblem ............................................................. 116
4.6 Corrective Actions ............................................................... 116
4.7 Recommended Test Equipment ..................................................... 116
5.0 SPECIFICATIONS AND RATINGS
5.1 Rating......................................................................... 117
5.2 Environmental Conditions ........................................................ 118
5.3 Adjustments . . . ................................................................. 119
5.4 BatteryOperation................................................................ 119
5.5 ElectricalSpecifications .......................................................... 120
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FIGURES
Figure3 SystemControlCabinets(SCCs) ..........................................................6
Figure4 SCCControlsandDisplayScreenwithExampleoftheMonitor/MimicScreen .....................10
Figure5 ModuleControlsandDisplayScreenwithExampleoftheMonitor/MimicScreen...................11
Figure7 SystemControlCabinet(SCC)BlockDiagram ..............................................19
Figure8 OperatorControls,65to80kVA(left)and100to500kVA(right) ...............................24
Figure9 SystemControlCabinetOperatorControls(SCCBPictured) ...................................25
Figure10 Series600TUPSandSCCOperatorControlPanels ..........................................26
Figure11 SwitchesBehindSCCControlPanelDoor ..................................................27
Figure14 SCCMonitor/MimicDisplayScreen ......................................................31
Figure15 ModuleMonitor/MimicDisplayScreen ....................................................33
Figure16 Monitor/MimicDisplayScreenExamples:NormalPowerFlowe.................................35
Figure17 Monitor/MimicDisplayScreenExamples:UtilityFail.........................................36
Figure21 Walk-InDisplayScreenDuringStart-Up ...................................................40
Figure23 PresentStatusReportScreens ............................................................42
Figure24 EventHistoryReportScreen .............................................................43
Figure25 HistoryStatusReportScreens ............................................................44
Figure26 BatteryCycleMonitorScreen............................................................46
Figure27 BatteryCycleMonitoringSummaryScreen .................................................47
Figure28 TypicalDataonDischargeCyclesof91to240Seconds Duration................................47
Figure29 SCCSystemConfigurationScreen ........................................................48
Figure34 MaximumAuto-RetransferAttemptsScreen ................................................53
Figure35 ModuleAlarmLimitSettingsScreen ......................................................55
Figure36 LoadTransferProceduresScreen .........................................................57
Figure37 SCCStart-UpProceduresScreen .........................................................58
Figure38 ModuleStart-UpProceduresScreen ......................................................59
Figure39 SCCShutdownProceduresScreen ........................................................60
Figure40 ModuleShutdownProceduresScreen......................................................61
Figure41 BatteryTimeScreenExample-15MinuteDischarge .........................................62
Figure42 BatteryTimeScreenExample-45MinuteDischarge .........................................63
Figure43 RangeofValuesforCalculatedBatteryTimes ...............................................64
Figure44 MeterCalibrationScreen................................................................65
Figure46 SCCStatusandAlarmMessageAreas .....................................................67
Figure47 LoadonBypass(UPSNotAvailable) ......................................................78
Figure48 LoadonBypass(UPSAvailable) .........................................................79
Figure49 LoadonUPS(BypassAvailable) .........................................................80
Figure 1 Multi-Module UPS, 65-80 kVA (left) and 100-500 kVA (right) ...................................3
Figure 2 Multi-Module 500-750 kVA UPS ..........................................................5
Figure6 UPSModuleBlockDiagram.............................................................14
Figure12 MenuTree ...........................................................................28
Figure 13 Master Menu Screens, SCC (above) and Module (below).......................................29
Figure 18 Monitor/Mimic Display Screen Examples: Load on Bypass, UPS Modules On and Charging Battery . . . . 37
Figure 19 Monitor/Mimic Display Screen Examples: Load on UPS, One UPS Module Off Line ................38
Figure 20 Monitor/Mimic Display Screen Examples: Load on Bypass, All UPS Modules Off Line . . . . . . . . . . . . . . 39
Figure22 StatusReportsScreen ..................................................................41
Figure30 DateScreen ..........................................................................49
Figure31 TimeScreen ..........................................................................50
Figure32 AutoDialSettingScreen ................................................................51
Figure33 ModemBaudRate .....................................................................52
Figure45 BatteryEqualizeScreen ................................................................66
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Figure50 MomentaryOverload(PulsedStaticBypassSwitch)..........................................81
Figure57 LoadonMaintenanceBypass(TwoBreakers) ...............................................88
Figure58 LoadonMaintenanceBypass(ThreeBreakers)..............................................89
Figure63 ModuleShutdownProceduresScreen ....................................................101
Figure64 Current-Versus-TimeCurveofModuleOverloadCapacity....................................103
Table1 AlarmMessages-MeaningandCorrectiveAction ...........................................70
Table4 TorqueSpecifications(UnlessOtherwiseLabeled) ..........................................115
Figure51 InputPowerFail(LoadonBattery) .......................................................82
Figure52 OneModuleOff-Line(LoadonUPS) .....................................................83
Figure53 LoadonUPS(BatteryNotAvailable) .....................................................84
Figure 54 Emergency Modules Off ................................................................85
Figure55 EmergencyPowerOff .................................................................86
Figure56 SystemShutdown .....................................................................87
Figure59 SCCStart-UpProceduresScreen .........................................................93
Figure60 ModuleStart-UpProceduresScreen ......................................................95
Figure61 LoadTransferProceduresScreen .........................................................97
Figure62 SCCShutdownProceduresScreen ........................................................99
TABLES
Table2 AlarmMessages-Summary .............................................................74
Table3 Series600TTerminalCommands.........................................................77
Table5 RecommendedTestEquipmentandTools..................................................116
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IMPORTANT SAFETY INSTRUCTIONS
Save These Instructions.
This manual contains important instructions that should be followed during installation and maintenance of your Series 600T UPS and batteries.
WARNING EXERCISE EXTREME CARE WHEN HANDLING UPS CABINETS TO
AVOID EQUIPMENT DAMAGE OR INJURY TO PERSONNEL. REFER TO SEPARATE INSTALLATION MANUAL FOR EQUIPMENT HANDLING INFORMATION AND INSTALLATION PROCEDURES.
FOLLOW ALL BATTERY SAFETY PRECAUTIONS IN 4.0 ­MAINTENANCE WHEN INSTALLING, CHARGING, OR SERVICING BATTERIES. IN ADDITION TO THE HAZARD OF ELECTRIC SHOCK, GAS PRODUCED BY BATTERIES CAN BE EXPLOSIVE AND SULFURIC ACID CAN CAUSE SEVERE BURNS.
IN CASE OF FIRE INVOLVING ELECTRICAL EQUIPMENT, USE ONLY CARBON DIOXIDE FIRE EXTINGUISHERS, OR OTHERS APPROVED FOR USE IN ELECTRICAL FIRE FIGHTING.
EXTREME CAUTION IS REQUIRED WHEN PERFORMING MAINTENANCE.
BE CONSTANTLY AWARE THAT THE UPS SYSTEM CONTAINS HIGH DC AS WELL AS AC VOLTAGES. WITH INPUT POWER OFF AND THE BATTERY DISCONNECTED, HIGH VOLTAGE AT FILTER CAPACITORS AND POWER CIRCUITS SHOULD BE DISCHARGED WITHIN 30 SECONDS. HOWEVER, IF A POWER CIRCUIT FAILURE HAS OCCURRED, YOU SHOULD ASSUME THAT HIGH VOLTAGE MAY STILL EXIST AFTER SHUTDOWN. CHECK WITH A VOLTMETER BEFORE MAKING CONTACT.
AC VOLTAGE WILL REMAIN ON THE SYSTEM BYPASS (SBB) AND UPS OUTPUT CIRCUIT BREAKERS, AND THE STATIC BYPASS SWITCH, UNLESS ASSOCIATED EXTERNAL CIRCUIT BREAKERS ARE OPENED.
CHECK FOR VOLTAGE WITH BOTH AC AND DC VOLTMETERS PRIOR TO MAKING CONTACT.
WHEN THE UPS SYSTEM IS UNDER POWER, BOTH THE OPERATOR AND ANY TEST EQUIPMENT MUST BE ISOLATED FROM DIRECT CONTACT WITH EARTH GROUND AND THE UPS CHASSIS FRAME BY USING RUBBER MATS.
SOME COMPONENTS WITHIN THE CABINETS ARE NOT CONNECTED TO CHASSIS GROUND. ANY CONTACT BETWEEN FLOATING CIRCUITS AND THE CHASSIS IS A LETHAL SHOCK HAZARD. EXERCISE CAUTION THAT THE TEST INSTRUMENT EXTERIOR DOES NOT MAKE CONTACT EITHER PHYSICALLY OR ELECTRICALLY WITH EARTH GROUND.
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1
OVERVIEW OF THIS MANUAL
The manual is organized so that information can be found quickly. Each major topic is separated by sections, and the Table of Contents contains major headings within each section. The names of the sections and their contents are described below.
1.0 - Introduction is a summary of the Series 600T UP S System. It describes some of the unique features and benefits of the Series 600T, as well as the design principles and standards that Liebert follows in the manufacture of each system. Descriptions of the Series 600T system and an overview of its functions are also included.
2.0 - Theory of Operation is an explanation of the major circuit groups of the Series 600T UPS. This section is for individuals who want to know both the basics and the specifics of each major component. The text explains how the UPS handles electrical disturbances and interruptions.
3.0 - Operation is written for facility personnel responsible for the operation of the system. It details the proce­dures required to start-up each module and the system, to transfer the load between the available sources, and to shut down each module and the system. Both manual and automatic operations are described. Operator controls and displays, including the solid state liquid crystal display (LCD) screen, are illustrated and explained for the UPS Module and for the System Control Cabinet (SCC).
4.0 - Maintenance lists routine maintenance checks and helps the user pinpoint and quickly resolve problems if they arise.
5.0 - Specifications and Ratings gives detailed specifications about the Series 600T UPS System. This technical information is of use to installing contractors, engineers, and service personnel.
If you require assistance for any reason, call the toll-free Liebert Global Services number: 1-800-543-2378. For LGS to assist you expediently, please have the following information available:
Part Numbers:
Serial Numbers:
kVA Rating:
Date Purchased:
Date Installed:
Location:
Input Voltage:
Output Voltage:
Battery Reserve Time:
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1.0 INTRODUCTION
1.1 System Description
The role of the pa rallel-redundant multi-module UPS system is to supply uninterruptible, clean power to the crit­ical load. It maintains a full-voltage, low-distortion output, even if the utility source power sags or becomes dis­torted.
If there is an outage of the source power, the UPS maintains power to the load until an alternate source of power is activated, or until the original power source is restored. If input AC power is not restored, the UPS maintains the load (with the battery plant) long enough that the critical equipment can be shut down in an orderly manner. The Series 600T UPS module displays the rate of battery discharge and calculates the amount of battery time remaining based on the actual connected load. The time that the battery will maintain the load depends on the capacity of the battery backup plant and the size of the load.
The system control logic automatically manages critical bus operation. System logic is resident in Application Specific Integrated Circuits (ASICs) for precise control and improved reliability.
If the critical load current exceeds the rated load of the Series 600T UPS system, the control logic determines the magnitude of the overload and reacts appropriately. Overloads are usually the result of inrush current require­ments. The UPS system supports loads that are 150% of the rated load for up to 30 seconds and 125% of the rated load for up to ten minutes. If the system is operating in the non-redundant mode (e.g., a UPS module is off line), the overload limits are automatically adjusted.
Figure 1 Multi-Module UPS, 65-80 kVA (left) and 100-500 kVA (right)
If the load surpasses the overload capacity of the UPS, the load is automatically transferred to bypass without interruption. When the load returns to within the UPS rating, it is either automatically or manually returned
Introduction 3
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(retransferred) to the UPS. How and when the load is returned to the UPS depends on several factors: how long the overload lasted, how many overload conditions occurred before transfer, whether there is an imminent failure of any part of the UPS, e tc. Refer to 3.4 - Automatic Operations.
In the unlikely event of a fault within the UPS, the SCC control logic, which continuously monitors all critical circuits within the UPS system, transfers the load to bypass without interruption and simultaneously sets off local and remote alarms. If a fault is detected in an individual UPS module, that module is automatically disconnected from the critical bus and shut down. A Module Off Line status message will appear at the SCC display. The module can be manually returned to service when the fault has been corrected.
If the multi-module UPS system is operating in the redundant mode (at least one extra module is available for the connected critical load), the load will remain on the UPS system if one individual module is disconnected from the critical bus (off line). If the UPS system is operating in the non-redundant mode, the load will be automati­cally transferred to bypass if a module goes off line.
The Series 600T UPS display system provides precise monitoring of the UPS, fast alarm response, and quick troubleshooting. For easy manual operations, menu-driven software provides access to several step-by-step help screens. All operator functions are performed using menu-prompted displays and a minimum number of operator controls. The System Control Cabinet includes external communication capability with both automatic dial-out and dial-in features for early warning and diagnosis of abnormal conditions.
The system software allows the operator, or Liebert Global Services, to enter application specific information. Overload, overvoltage, battery discharge, and shutdown limits can be set by the operator. In effect, the software is tailored for each site.
The UPS system protects critical equipment from source power disturbances and outages, load faults, and UPS malfunctions. This triple protection virtually eliminates computer and computing equipment downtime as a result of utility source power problems.
4 Introduction
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Figure 2 Multi-Module 500-750 kVA UPS
Introduction 5
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Figure 3 System Control Cabinets (SCCs)
Types of System Control Cabinets (SCCs)
• SCCT -- A stand-alone cabinet containing system control logic for up to six UPS modules, a static bypass
switch, manually operated disconnects for the static bypass switch, and two motor-operated system circuit breakers.
• SCCB -- Similar to the SCCT, e xcept that external sheet metal matches that of the UPS modules.
• SCCP -- Similar to the SCCB, except narrower and designed for two UPS modules.
• SCCI -- System control logic and static bypass switch are integrated into a switchboard cabinet manufac-
tured by others, which also includes the system circuit breakers.
• SCCC -- An integrated configuration like the SCCI, but with a static switch rated for continuous duty.
6 Introduction
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1.2 Reliability
Reliability is the most important design goal for Uninterruptible Power Systems. Liebert Series 600 UPS systems have demonstrated reliability by achieving a field-proven critical bus MTBF in e xcess of one million hours. In addition, our Quality Assurance program is certified to the requirements of ISO 9001 standards.
Liebert Large UPS systems are ETL listed to the requirements of UL 1778. All equipment and components are manufactured to applicable UL, NEC, NEMA, ANSI, IEEE, and CSA standards and guidelines.
Designed for Success
The keys to reliability in the design of the UPS system are using conservatively rated components, minimizing transfers to bypass, making operator controls understandable, and providing easy access for maintenance and repair. Liebert UPS systems lead the industry in all these areas.
For example, the Series 600T can clear substantial overloads through the solid state static bypass switch without transferring to the bypass source. By minimizing transfers to bypass, the Series 600T minimizes operation of cir­cuit breakers and enhances system reliability.
As another example, the system control logic has been packaged into Application-Specific Integrated Circuits (ASICs) to eliminate the failure-prone discrete logic boards used in other brands of UPS products. Furthermore, these ASICs are isolated from heat-generating components to ensure optimal operating temperatures.
Other Factors to Consider
Reliability depends on more than just UPS module design. Improper installation can cause any system to fail. To prevent this, Customer Engineers from Liebert Global Services thoroughly inspect the installation of all our sys­tems to ensure they are installed properly and operating within performance specifications.
Once a UPS is properly installed, you—the on-site equipment operator—are the most important factor in pre­venting critical bus failures or unplanned transfers to bypass. To make your task easier, the Series 600T UPS pro­vides easy-to-follow, prompted instructions on the industry’s largest operator display screen.
If you ever need help, call Liebert Global Services (24 hours a day at 1-800-543-2378). Your attention to proper installation, operation, and periodic maintenance will ensure that your mission-critical operations receive the best possible protection from electrical disturbances and outages.
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1.3 Safety Precautions
Read this manual thoroughly, paying special attention to the sections that apply to you, before working with the UPS. Also read the battery m anufacturer’s manual before working on or near the battery.
Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area around the UPS system and Battery should be kept free from puddles of water, excess moisture, or debris.
Special safety precautions are required for procedures involving handling, installation, and maintenance of the UPS system or the battery. Observe precautions in the separate Installation Manual before handling or installing the UPS system. Observe precautions in 4.0 - Maintenance, before a s well as during performance of all mainte­nance procedures. Observe all battery safety precautions in 4.0 - Maintenance before working on or near the battery.
This equipment contains several circuits that are energized with high voltage. Only test equipment desig­nated for troubleshooting should be used. This is particularly true for oscilloscopes. Always check with an AC and DC voltmeter to ensure safety before making contact or using tools. Even when the power is turned Off, dan­gerously high potentials may exist at the capacitor banks. Observe all battery precautions when near the battery for any reason.
ONLY qualified service personnel should perform maintenance on the UPS system. When performing maintenance with any part of the equipment under power, service personnel and test equipment should be stand­ing on rubber mats. The service personnel should wear insulating shoes for isolation from direct contact with the floor (earth ground).
Unless all power is removed from the equipment, one person should never work alone. A second person should be standing by to assist and summon help in case an accident should occur. This is particularly true when work is performed on the battery.
Three types of messages are used throughout the manual to stress important text. Carefully read the text below each Warning, Caution, and Note and use professional skills and prudent care when performing the actions described by that tex t.
A Warning signals the presence of a possible serious, life-threatening condition. For example:
WARNING LETHAL VOLTAGES MAY BE PRESENT WITHIN THIS UNIT EVEN
WHEN IT IS APPARENTLY NOT OPERATING. OBSERVE ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY QUALIFIED TO DO SO!! NEVER WORK ALONE.
A Caution indicates a condition that could seriously damage equipment and possibly injure personnel. For example:
CAUTION Make sure you understand the proper sequence before operating any circuit
breaker. Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load.
A Note emphasizes important text. If the note is not followed, equipment could be damaged or may not operate properly. For example:
NOTE
If the UPS system has a blown fuse, the cause should be determined before you replace the fuse. Contact Liebert Global Services.
8 Introduction
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1.4 Modes of Operation
Refer to 2.0 - Theory of Operation and 3.0 - Operation for more details.
1.4.1 Normal (Load on UPS)
The utility AC source provides power to the rectifier/charger in each UPS module. Each rectifier/charger con­verts the utility AC power to DC and supplies DC power to the UPS module inverter while simultaneously float charging the battery plant. Each UPS module inverter converts DC to AC and furnishes AC power to the critical bus. The System Control Cabinet (SCC) is the tie point for the paralleled modules and monitors and controls the critical bus performance.
1.4.2 Input Power Failure
If the utility source power fails or is outside the acceptable range, the battery plant becomes the primary supplier of DC power to the inverter.
1.4.3 Recharge
After the utility source power is restored, or an alternate power source becomes available, each rectifier/charger slowly walks-in to once again power the inverters and recharge the battery plant.
1.4.4 Overload
Overloads in critical systems may be caused by inrush currents during connected equipment start-up or by faults in the critical load. The Liebert Series 600T UPS system can maintain full output voltage regulation while sus­taining the following overloads:
• Up to 150% for 30 seconds
• Up to 125% for 10 minutes
• Up to 104% for an indefinite period of time
Also, for clearing momentary faults above 155% of rated SCC current, the static switch turns on for 40 millisec­onds to supply power from the bypass source. Up to 1000% of the rated current can be supplied for less than one cycle, while up to 500% of rated load can be sustained for the full 40 milliseconds of pulsed-parallel operation.
The critical load remains on the UPS modules for the above conditions. If the UPS system overload capacity is exceeded, an automatic transfer to bypass is initiated, which closes the system bypass circuit breaker (SBB) and opens the UPS output circuit breaker.
Whenever you have an overload condition, you should determine the cause of the overload.
1.4.5 Redundant
If the multi-module UPS system includes one more module than the number required to supply the critical load, the UPS system can operate in the redundant m ode. This means that the load will remain on the UPS system if one of the modules is disconnected because of an overload, an internal fault, or for maintenance. If the additional module is not included in the system design, or if the additional module is disconnected from the critical bus, the UPS system operates in the non-redundant mode.
1.4.6 Bypass (Internal)
The SCC control logic initiates an automatic transfer to the bypass source if the overload-current-versus-time curve is exceeded or if specified UPS system faults occur. You can also manually transfer the load to the bypass (without interruption) if you must take the UPS module out of service for maintenance.
The SCC internal maintenance bypass will allow most key components and operating modes to be checked with­out disturbing the critical bus. However, certain key power-carrying components, such as the output and bypass circuit breakers, will require complete system shutdown or isolation through an external maintenance bypass cabinet for 100% service.
1.4.7 Maintenance Bypass
The installation of a Maintenance Bypass Cabinet, Panelboard or Switchboard is recommended to allow you to totally isolate the UPS from all power sources. Use of the Maintenance Bypass is described in 3.0 - Op eration.
1.4.8 Off-Battery
The battery plant can be disconnected from the rectifier/charger by using an external Module Battery Disconnect (MBD circuit breaker). The UPS module continues to function normally, though it does not have power outage back-up capability until the battery plant is reconnected.
Introduction 9
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1.5 Operator Controls
The Liebert Series 600T UPS System Control Cabinet (SCC) and each individual module are equipped with a microprocessor-based Operator Display Screen and Control Panel designed for convenient and reliable opera­tion.
The front panel location of t he monitoring and control system enables the user to quickly identify the current sta­tus of the UPS and to perform most of the manual operations. The operator display screen is driven by an easy­to-follow menu-prompted software program that controls and monitors the UPS system.
Figure 4 SCC Controls and Disp lay Screen with Exa mple of the Monitor/Mimic Screen
The operator controls and Monitor/Mimic screen for the System Control Cabinet (SCC) are shown in Figure 4. The controls and display screen for each UP S module are shown in Figure 5. Each cabinet (SCC or module) has the displays and controls required to monitor and perform its functions.
Figure 4 shows a three-module system designed for redundant operation. A multi-module UPS system may include up to six (6) modules for each SCC.
Detailed instructions on how to interpret the displays and use the controls are in 3.0 - Operation.
10 Introduction
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Figure 5 Module Controls and Display Screen with Example of the Monitor/Mimic Screen
Introduction 11
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1.6 Options
A number of standard pre-designed options are available from Liebert for your UPS system. Described below are the most frequently provided options. Note that the battery items (1-3) are required to complete the UPS system. The remaining options provide improved system performance or convenience.
1. Battery
The batteries provide power in the event of a power outage. The Liebert UPS can use a variety of battery types, provided the battery plant is designed for the UPS DC voltage range and the load requirements of your application.
2. Battery Racks or Cabinets
The battery racks are specifically designed for stationary service batteries. They are painted with electrolyte­resistant paint for corrosion resistance. Battery cabinets are available for 150 through 600 kVA modules.
3. Module Battery Disconnect
The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries. A sensing cir­cuit in the UPS module, set at the battery low voltage limit, trips the Module Battery Disconnect to safe­guard the battery from excessive discharge. The Module Battery Disconnect has an undervoltage release mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed from the U PS system
4. Input Distortion Filter
This filter reduces rectifier input current reflected harmonic distortion to less than 7% THD, and less than 4% THD for modules with the optional 12-pulse rectifier. The filter is factory installed within the UPS. This filter also improves the input power factor to better than 0.92 lagging.
5. 12-Pulse Rectifier
Certain models may be ordered with the optional 12-pulse rectifier section. This provides input isolation and reduces reflected input current THD to less than 9%, or less than 4% with optional input filter.
6. Isolation Transformers
An optional rectifier input isolation transformer is available in a matching transformer cabinet. A bypass iso­lation transformer is also available.
7. Three Breaker Maintenance Bypass
This switchboard provides make-before-break maintenance bypass. It includes: UPS Bypass Input Breaker (BIB), Maintenance Bypass Breaker (MBB), and Maintenance Isolation Breaker (MIB).
8. Two Breaker Maintenance Bypass
This switchboard provides make-before-break maintenance bypass. It includes: Maintenance Bypass Breaker (MBB) and Maintenance Isolation Breaker (MIB).
9. Load Bus Synchronization (LBS)
The Load Bus Sync (LBS) option keeps two independent UPS systems (and therefore their critical load buses) in sync, even when the modules are operating on batteries or asynchronous AC sources. This means that critical loads connected to both load buses through a Static Bus Transfer Switch can be switched seam­lessly between the two.
10. SiteScan Central Monitoring System
Liebert manufactures a central monitoring system that automatically displays key UPS measurements and alarms, as well as data from a variety of sensors. This monitoring system signals alarms so corrective action can be taken. Events and data can be printed in hard copy. Data can be logged for analysis.
11. Remote Monitor Panel
The UPS system may also be provided with an optional Remote Monitor Panel. This Panel provides eight LED indicators and may be placed at a convenient location near the critical load. A functional description of the Remote Monitor Panel is provided in 3.0 - Operation of this manual.
12. Customer Alarm Interface
This optional interface board allows the input and display of 8 alarms from customer-supplied contacts, each with a customer-selected name of up to 16 characters. The following attributes can be user programmed for each alarm: latching, summary, freeze history, sound horn, auto-dial, and time delay (0 to 999.9 seconds).
12 Introduction
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2.0 THEORY OF OPERATION
2.1 General Component Descriptions
The UPS system includes all of the equipment necessary to continuously provide computer-grade AC power to a critical load, even when there is an interruption of the utility line power. It consists of a System Control Cabinet (SCC), UPS modules, and a back-up battery plant. Refer to Figure 6 and Figure 7. Except where otherwise noted, the configuration is presumed to be parallel-redundant (with at least one more UPS module than required to support the rated load).
System Control Cabinet
The System Control Cabinet (SCC) includes system controls, static bypass switch, load transfer control, protec­tive devices, and other accessories. The system controls simultaneously monitor two or more parallel UPS mod­ules sharing a critical load for increased capacity and/or redundancy. The two (2) motor-operated system circuit breakers (system bypass breaker—SBB and UPS output breaker) may be contained within the SCC, depending on the configuration designed for your installation.
System Controls: The system control logic automatically manages critical bus operation and monitors perfor­mance of the UPS modules. Microprocessor technology and dedicated firmware provide advanced logic control and a comprehensive display of information. The system control logic synchronizes the output of the UPS sys­tem to the bypass source. The SCC includes ports for communicating with external devices. Liebert Multi-Mod­ule Units do not require an SCC for load sharing. Automatic, parallel module load sharing is a function built into the modules themselves; however interconnection through the SCC enables the modules to share data for more precise control. Modules do not require master clocks or controls in order to load share or free-run at 60.0 Hz.
Static Bypass Switch: The static (solid-state) bypass switch immediately transfers the load from the inverter to the bypass AC power source in the event of a severe overload on the system or a failure within the UPS. This transfer takes place without any interruption of the power supplied to the load. The system includes redundant circuits to detect and isolate shorted SCRs in the static switch.
Fuses are installed in series with the static bypass circuit to ensure reliable overload protection in the unlikely event of a catastrophic output condition (e.g., a dropped wrench) electrically close to the output of your UPS sys­tem. The static switch SCRs themselves are rated to easily handle the fuse-blowing current.
Bypass Circuit: The bypass circuit consists of electrically operated circuit breakers and associated synchroniz­ing and control circuitry to transfer the load to/from the bypass source.
Theory of Operation 13
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Figure 6 UPS Module Block Diagram
MULTI-MODULE UPS SYSTEM
CONTROL POWER
Control
Wiring
To SCC
Controls
Utility
Input
Power
Input
CB
Rectifier/
Charger
Inverter
Output
CB
Battery
MBD
CB - Circuit Breaker MBD - Module Battery Disconnect SCC - Syste m Control Cabinet
Output
Power
To SCC
UPS Module
The UPS module consists of module controls, a rectifier/charger, an inverter, protective devices, and other acces­sories.
Module Controls: The module control logic monitors performance of the UPS module. The UPS module status is displayed locally and is also sent to the System Control Cabinet.
Rectifier/Charger: The rectifier/charger converts utility power from AC to DC to charge the battery and pro­vide the DC input to the inverter. Its design limits reflected harmonic current distortion to source power and pro­vides low-ripple DC power for charging batteries. Multiple rectifier/chargers can share a common battery plant, if that configuration i s preferred for your application.
Inverter: The inverter converts DC power into the precise AC power required to supply a sensitive critical load. The inverter converts DC power into a pulse-width-modulated (PWM)/six-step waveform that is easily filtered into a clean sine wave output. The PWM/stepwave also minimizes the harmonic voltage distortion caused by typical switching power supplies and other non-linear load components used in computers and related electron­ics.
Battery Plant
The battery is used as the alternate source of power to supply DC power to the inverter if the AC supply voltage is outside the acceptable range. The battery supplies power to the inverter until the utility power is restored or until an alternate power source is available. If AC source power is not restored or an alternate power source is not available, the battery can be sized to provide power long enough for an orderly shutdown of the load.
14 Theory of Operation
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2.2 Detailed Component Descriptions
2.2.1 Controls
Hardware
The Series 600T UPS Operator Interface Display System is designed to provide all of the information that is required for the operation of each UPS cabinet (the System Control Cabinet and each module). The following is a list of the hardware features:
1. The control logic performs automatic operations with minimal operator interface. The limited number of manual controls are easy-to-use.
2. Each Series 600T UPS cabinet is equipped with an easy-to-read 640 x 200 pixel liquid crystal display (LCD) screen. It presents information in a way that is easy to understand at an eye-level front panel location.
3. The display is controlled by a dedicated microprocessor with a non-volatile (EPROM) program and a battery-backed event memory.
4. The Series 600T System Control Cabinet (SCC) has communication ports (terminal board connections) for: a. Transmission of present status information to remote terminals via resident auto-dial communications
program and an external modem. This port also responds to inquiries of the UPS system status and history from the remote terminal.
b. Reporting UPS system status and history information in response to inquiries from a local terminal (no
modem required). c. Reporting to a local monitor the information requested from the local terminal.
d. Reporting information to a Liebert SiteScan central monitoring system. e. Relaying selected alarm messages to a Liebert Remote Monitor Panel and to a separate terminal board
for customer use. f. Relaying performance and status information to your network monitoring system via SNMP interface.
NOTE
All external communication devices are optional equipment.
Firmware
The Operator Interface Display System software enables the operator to monitor the UPS system status, to con­trol the power flow through the UPS, to monitor all of the meter readings, to execute the start-up, shutdown, and the load transfer procedures, to access the event history files, and to make adjustments to the programmable parameters. The following is a list of the firmware features:
1. The menu-driven software prompts the operator for input.
2. Step-by-step instructions assist the operator during start-up, shutdown, and load transfer procedures. This helps to eliminate operator errors.
3. Graphics-based mimic diagrams illustrate circuit breaker status and the power flow through the UPS system.
4. The Present Status screen reports information about the system’s present status. The History Status screen chronicles the events leading up to and immediately after a fault. The Event History screen lists all of the alarm messages that have been logged over a period of time.
5. The Battery Cycle Monitor records information on up to 132 battery discharge events. Information includes date, time, length of discharge, highest current demand, lowest battery voltage, and cumulative battery amp hours d ischarged.
Refer to 3.0 - Operation for a description of the controls and indicators located on the Operator Control Panel.
2.2.2 Rectifier/Charger
The UPS module rectifier/charger consists of an input circuit breaker, optional input isolation transformer, AC current limiting circuit, battery equalize charge circuit, DC filter, battery charge current limiting circuit, and bridge rectifiers.
Operation
The rectifier/charger converts the AC input power to DC power. This conversion is accomplished by 3-phase bridge rectifiers using SCRs. All phases are individually fused. Reflected input current THD is less than 7% at
Theory of Operation 15
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full load with optional input filter. For modules 500 kVA and larger, the optional 12-pulse rectifier reduces reflected THD to less than 4% with optional filter, or 9% without.
The filtered output of the rectifier/charger provides regulated DC power to drive the inverter and charge the bat­te r y.
Input Circuit Breaker
The input circuit breaker (CB1) is sized to allow enough current to recharge the battery and supply a full rated load at the same time. The circuit breaker contains a thermal magnetic trip mechanism and an undervoltage release that interrupts power, preventing damage to the system, if there is an internal AC over-current condition or a short circuit. The circuit breaker also opens during certain alarmed faults. This circuit breaker must be closed manually.
Isolation Transformer
The optional input isolation transformer has a dry type core, and copper windings with class H insulation. The transformer on modules with standard 6-pulse rectifier has wye primary and delta secondary windings. For mod­els with the optional 12-pulse rectifier, the transformer has a delta primary, with delta and wye secondary wind­ings. The isolation transformer provides the initial step of critical bus isolation. This reduces the AC shock hazard at the battery and at other DC components, and prevents a DC fault from disrupting upstream AC cir­cu i try.
The transformer has a nominal tap and one tap 6% below the rated nominal input voltage (normally used for 460 VAC input).
Input Current Limit
AC input current-sensing transformers (CTs) are used to measure current levels. Control circuitry connected to the CTs restricts the AC current to less than 125% of the full input current rating by reducing the battery charging voltage. This current limit is adjustable from 100 to 125% and is factory set at 115%. A second (optional) level of input current limit can be initiated by an external contact closure (field supplied for use with back-up genera­tor), and is adjustable from 85 to 100% (factory set at 100%).
During a start-up procedure, the current slowly ramps up (walks-in) from 20% of the rated input current to 100% over a 15 to 21 second period. The maximum rate of change of the AC input current is 15% per second. The input current walk-in reduces the start-up surge distortion effects on all other equipment connected to the same source and prolongs the service life of internal components.
Input Current Inrush
The maximum sub-cycle of inrush current due to the optional input isolation transformer is less than 500-800% of the rated input current for the first 1/2 cycle. Without the optional transformer, inrush current is typically less than 2-3 times normal.
Input Power Factor
The rated input power factor is no less than 0.85 lagging at the nominal input voltage and the full rated UPS load. The optional input filter will improve the power factor to better than 0.92 lagging at full load. Refer to published specifications for your UPS model.
2.2.3 Battery Charging Circuit
The UPS module charging circuit is capable of recharging the battery plant to 95% of full capacity within 10 times the discharge time. Recharging the last 5% takes longer because of characteristics inherent in the battery. DC ripple voltage is limited to less than 0.5% RMS to preserve battery life during long-term float charging while the UPS system is operating on utility source power.
Multiple UPS module rectifier/chargers can share a common battery plant, if that configuration is preferred for your application.
Operation After Discharge
When commercial power is interrupted, the battery continues to supply DC power to the inverter without inter­ruption to the critical load. If the AC source power is restored before the battery has fully discharged, the rectifier automatically restarts and resumes carrying the inverter and battery recharge load requirements.
16 Theory of Operation
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Operation After End-of-Discharge
The battery time screen displayed on the control panel enables you to estimate when battery shutdown will occur. You will have enough time to energize an alternate AC power source or to initiate an orderly shutdown of the critical load. If the battery plant discharges to the shutdown point during an outage, the UPS automatically dis­connects the load, the AC input, and the battery. After AC input power is restored, the rectifier can be manually restarted by the user.
Battery Disconnect
The external module battery disconnect (MBD) circuit breaker is used to isolate the UPS module from the bat­tery during maintenance and to automatically disconnect the battery from the inverter at the end of battery dis­charge. The MBD circuit breaker can be opened or tripped automatically, from the control panel, or manually. It must be closed manually.
Battery Charge Current Limiting
The battery recharge current, after a battery discharge, is limited to between 1 and 25% (adjustable) of the full load discharge current. An additional (optional) charge-limiting c ircuit can be activated by external dry contact closure (field supplied) for use when operating on a back-up generator. These two levels of control regulate the amount of current that flows from the power source to the battery while the battery is recharging.
The battery charge current limit is factory set at 10% for normal operation and at 1% for alternate power source recharge operation.
Battery Equalize Charge Circuit
The battery equalize charge feature can be manually initiated or it can be programmed to operate automatically. Either can be selected from the battery equalize screen displayed on the control panel.
The battery equalizing charge circuit increases the rectifier/charger output voltage to charge the battery any time there is a power outage of 30 seconds or longer. The equalizing voltage is slightly higher than the float voltage. This decreases the time required to recharge the battery.
NOTE
Do not use equalize charging with valve-regulated lead-acid batteries
Consult the battery manufacturer's manual for specific information about equalize charging.
Theory of Operation 17
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2.2.4 Inverter
The inverter is a solid state device that converts the DC output of the rectifier/charger or the battery to AC power.
Operation
The inverter converts DC power—from either the battery or the rectifier/charger—into three pulse-width-modu­lated/six-step waveforms. These waveforms are filtered into low-distortion sine wave power. The inverter is con­trolled by an Application-Specific Integrated Circuit (ASIC). This integrated circuit controls the precise synchronization, amplitude, and frequency of the output voltage.
In addition to the inverter efficiently supplying a regulated AC output from a DC source, the output isolation transformer acts as a second stage of isolation between the critical load bus and the commercial source power. The inverter is configured to handle most critical load inrush surges. It maintains output voltage Total Harmonic Distortion (THD) within specifications even when handling non-linear computer loads. Refer to non-linear load characteristics.
Output Regulation and Overload Performance
The inverter is capable of sustaining full output voltage ±2% of the nominal voltage) for up to 150% overload at the output for as long as 30 seconds without reducing the output voltage. It can also handle at least 125% of the rated current for up to 10 minutes and 104% of the rated current continuously. The System Control Cabinet (SCC) will transfer the critical load to the bypass source if the overload exceeds the system capacity or the capac­ity of the modules on-line. The multi-module overload capacity (in terms of percent of rated full load current of modules on-line) is 140% for 20 seconds, 108% for 10 minutes, and 104% continuously.
Note that in normal operation the SCC will transfer the load to bypass before a UPS module exceeds its overload capacity. If a module overload condition is sustained (beyond inverter capacity) the UPS module is automatically taken off-line (disconnected from the critical bus) and is shut down. If the UPS system is operating in the redun­dant mode, the load may remain on the UPS system. Refer to 3.4 - Automatic Operations.
Non-Linear Load Characteristics
Computers and computer equipment with switching power supplies generate non-linear currents rich in fifth and seventh harmonics.
The inverter pulse-width-modulated/six-step waveform, coupled with the output filter, provides a natural path for reducing the fifth and seventh harmonic currents produced by the load. The inverter/filter limits the output voltage THD to less t han 5% with up to 100% typical electronic data processing (EDP) loads. EDP equipment characteristically includes both non-linear and linear load components.
Unbalanced Load Characteristics
Unbalanced loads are actively regulated. The phase-to-phase voltage balance is maintained to within 2%, even with a 50% load imbalance.
The three-phase, root mean square (RMS—approximately 70% of the peak) average voltage is also regulated through a separate control circuit (phase-to-phase sensing).
18 Theory of Operation
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2.2.5 Static Bypass
A static bypass is an integral part of the UPS System Control Cabinet (SCC). Refer to Figure 7. The static bypass consists of solid-state switching devices working in conjunction with the motor-operated System Bypass Breaker (SBB). An automatic transfer control circuit senses the status of the operator controls, UPS logic signals and alarm messages, and c ritical bus operating conditions. If the UPS modules can no longer supply the critical load, the static bypass switch (in conjunction with the SBB and UPS Output Breaker) automatically transfers the critical load to the bypass source without interruption.
Figure 7 System Control Cabinet (SCC) Block Diagram
Bypass Line
Syn c &
Transfer
Control
Power
UPS
System
Modules
Supply
System Monitor
Voltage
Adjust
Static Bypass Breaker
Transfer
Control
Gate
Driver
Static
Bypass
Switch
Static Switch
Disconnects
Alarms
To Crit ical
UPS Output
Load
Fuse Protection
The static bypass switch path uses two back-to-back SCRs per phase. Each phase is individually protected by a fuse sized to clear only in the event of a catastrophic fault. This is a more reliable method than depending on external protection devices. The fuses are in the circuit to protect the critical bus distribution equipment against catastrophic faults. The static switch SCRs are oversized to easily handle any current surges that may blow the fuses.
Shorted SCR Monitoring
The static bypass system has redundant shorted SCR sensing c ircuits and disconnects. This will prevent UPS out­put power backfeed to the distribution system even if two component failures exist simultaneously. If a shorted SCR is detected, the static bypass switch is isolated and annunciated at the SCC control panel, and the critical load remains on UPS output power.
Static Switch Isolation
The motor-operated system bypass circuit breaker (SBB), wired in parallel with the static switch, automatically closes in approximately 200 milliseconds after the load is transferred to the bypass power source, removing the static switch from the power flow.
Theory of Operation 19
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Also, if required for maintenance, the static switch can be isolated from the bypass line by opening (to the OFF position) the Static Switch Disconnects.
Pulsed Parallel Operation
When an overload condition such as magnetic inrush current or a branch load circuit fault exceeds the overload capacity of the connected modules, the static bypass switch pulses on for 40 milliseconds. This allows up to 1000% of the rated full load current from the bypass line to clear the overload without closing the bypass circuit breaker. The bypass source is briefly in parallel with the UPS system, permitting the bypass source to carry the initial overload current. If the overload clears before 40 milliseconds, a load transfer to bypass is not made. If the overload condition continues, the automatic transfer is made (maintaining the load voltage within the specified limits).
This pulsed static switch operation reduces nuisance operation of motor-operated circuit breakers for such short­term conditions.
Load Transfers
Transfers to (transfer) or from (retransfer) the bypass may be performed automatically or manually in a make­before-break sequence. This is accomplished through the overlapping operation of the UPS output and the sys­tem bypass power switching devices.
Manual load transfers and retransfers are initiated by the operator from the System Control Cabinet (SCC).
In a manual operation, or an automatic retransfer, the two motorized circuit breakers—UPS output and system bypass—are both closed simultaneously for a short period of time (overlap).
Automatic transfers are initiated by the SCC system control logic when an overload is beyond the specified capa­bilities of the UPS system or when a fault occurs within a non-redundant UPS module. An automatic retransfer is initiated if this function is enabled and if system conditions for a retransfer are present.
In an automatic transfer, the circuit breakers do not overlap, but during the short time gap bypass power is sup­plied to the critical load through the solid state static switch.
20 Theory of Operation
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Transfer and Retransfer Conditions
1. Automatic Transfers to Bypass
Critical bus conditions that will initiate an automatic transfer of the critical load from the UPS system to the bypass source are:
a. System Overload: overcurrent condition in excess of the overload rating of the System Control Cabinet
(SCC).
b. Output Overload: overcurrent condition in excess of the c urrent-versus-time overload capacity of UPS
modules ON LINE.
c. Over/Under Voltage (OV/UV): critical bus voltage is outside the allowable tolerance. d. Non-redundant UPS Module Inoperative: an essential UPS module is taken OFF LINE for one of the
reasons below.
1. Battery discharged to the shutdown voltage.
2. Inverter overload capacity exceeded.
3. Inverter or rectifier fault condition (power, logic, or over-temperature) present or imminent.
4. Failure of UPS module logic or logic power.
e. SCC Logic:
1. Emergency Module Off (EMO) circuit activated.
2. Failure of UPS system logic or logic power.
2. Manual Transfers
Manual transfers may be initiated at any time provided no transfer inhibition conditions are present.
3. Transfer Inhibited
A manual transfer to the bypass source shall be inhibited if any of the following conditions exist: a. Bypass frequency deviates ±0.5 Hz from the nominal. b. UPS system to bypass voltage difference ( V) exceeds a predetermined percentage (normally 5%).
c. Static switch disconnects (manual switches) open. d. OK to Transfer signal from the control logic is not present.
NOTE
A load transfer to the bypass line will be completed whenever an automatic transfer to bypass is initiated If the Static Switch Unable alarm message is present for any reason (including a ±20° phase lock synchronization error), the automatic transfer will be interrupted for 40 to 120 milliseconds. Because of the reliability of the UPS components, an interrupted load transfer is a very unlikely occurrence.
4. Automatic Retransfers to UPS
Critical bus conditions that must be present to initiate an automatic retransfer (Auto-Rexfer) of the critical load from the bypass source to the UPS system a re:
a. The number of Auto-Rexfer Attempts selected must be greater than zero (0). If zero (0) is selected, no
automatic retransfer will occur. b. Critical load was initially transferred to the bypass source due to a system overload only. c. Overload has since dropped below 100% of the rated SCC current. d. Enough UPS modules are ON LINE to supply the critical load. e. OK to Transfer signal received from the control logic for at least 10 seconds, within 5 minutes of the
overload transfer. (A manually initiated retransfer from bypass is required for overloads lasting 5
minutes or more.) f. Cyclic-type system overloads, which occur up to five (select range is 0 to 5) times in 60 m inutes, are
automatically returned to the UPS system for each event including the Nth overload. A manually
initiated retransfer from bypass is required for the N+1 overload.
Theory of Operation 21
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5. Manual Retransfers
Manual retransfers may be initiated at any time provided no retransfer inhibition conditions are present.
6. Retransfer Inhibited
A retransfer from the bypass source to the UPS system shall be inhibited if any of the following conditions exist:
a. Manual (and Automatic) Retransfer Inhibitions:
1. Bypass frequency exceeds ±0.5 Hz of the nominal.
2. UPS system-to-bypass voltage difference ( V) exceeds a predetermined percentage (normally
5%).
3. System circuit breaker (UPS output or SBB) is inoperative.
4. OK to Transfer signal from the control logic is not present.
5. Not enough UPS modules are ON LINE to supply the connected critical load.
b. Automatic Retransfer Inhibitions (in addition to those above):
1. The load transfer to bypass was not caused by a system overload.
2. Excessive cyclical overloads within a one-hour period.
3. Retransfer conditions are not satisfied within 5 minutes of the initial transfer.
2.2.6 Redundant Mode
The typical multi-module UPS system is configured with a back-up (redundant) UPS module, connected in par­allel to share the critical load with the other module(s). This parallel redundant system includes one more module than is required to supply the full critical load.
A parallel redundant system will always be in the Redundant Mode if all modules are ON LINE. In addition, if the critical load is reduced so that not all ON LINE modules are required, the UPS system can also operate in the Redundant Mode with one or more modules OFF LINE. The critical load will remain on the UPS system—even if one or more of the modules is taken OFF LINE for maintenance or because of an internal fault—as long as the remaining ON LINE modules can carry the full connected system load.
The system control logic monitors the connected critical load and the number of UPS modules ON LINE. If the UPS system is operating in the Redundant Mode, the REDUNDANT status message will be displayed at the System Control Cabinet (SCC). If the UPS system is operating in the Non-Redundant Mode (redundant module is OFF LINE or was not included in the system configuration), the NON-REDUNDANT status message is dis­played at the SCC. In the Non-Redundant Mode, the critical load will be transferred to bypass if any UPS module goes OFF LINE and the remaining ON LINE module(s) cannot carry the connected load without being over­loaded.
The system control logic, located in the SCC, automatically adjusts the allowable overload limits based on the connected load and the number of modules ON LINE.
22 Theory of Operation
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3.0 OPERATION
3.1 Display Screen and Operator Controls
Each Liebert Series 600T UPS cabinet is equipped with a microprocessor-based Operator Control Panel and Dis­play Screen and System Control Panel designed for convenient and reliable operation. The System Control Cab­inet (SCC) performs different functions than the UPS modules. Each cabinet has the controls and displays required to operate and monitor its functions. The locations of operator controls are shown in Figure 8 through Figure 11.
The front location of the control panel enables the user to quickly identify the current status of the UPS system and to perform most of the manual operations. The operator display screen is driven by an easy-to-follow menu­prompted software program.
Features
The Series 600T interface display system enables the operator to easily perform the following:
• Obtain a quick indication of operational status:
• Is the critical bus OK?
• Is the UPS system OK?
• Which UPS modules are available?
• Is the battery available?
• Is the bypass line available?
• Monitor the power flow through the UPS system and monitor all meter readings:
• Is the critical load being supplied power from the UPS system or bypass?
• Are input, battery, and output voltage, frequency, and current readings at nominal levels?
• How much battery time is still available during an outage?
• Is the battery recharging after discharge?
• Execute operational procedures:
• Perform critical bus transfer/retransfer between the UPS system and the bypass line.
• Start-up and shut down the UPS system and each module.
• Shutdown the system and all modules instantly in the event of an emergency.
• Access status reports and history files:
• Obtain a complete listing of the present status of the UPS system and all modules (input, output, and
battery voltage, frequency, and current readings, and any alarms that may be present).
• Review a complete history report of all events leading up to and immediately after a fault condition.
• Examine an archive listing of all alarm conditions that have occurred over a period of time.
• Make adjustments to programmable parameters (access limited by Security Access function):
• Set the date and the time functions.
• Change the auto-dial phone number and the modem options.
• Select the number of auto-retransfer attempts.
• Make adjustment to the UPS output voltage before performing a manual load transfer.
Operation 23
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Figure 8 Operator Contro ls, 65 to 80 kVA (left) and 100 to 500 kVA (right)
2
5
Item Description Function
1 Input Circuit Breaker
(behind door of 65-80 kVA) (CB1)
This manually operated circuit breaker provides power to the UPS module rectifier. In 625-750 kVA modules and some 500 kVA modules, this breaker is located in the transformer cabinet.
2
5
2 Module Output Circuit
Breaker (behind door of 65-80 kVA) (CB2)
3 Operator Control Panel Refer to Figure 10 for controls available on this panel.
4 Control Disconnect
(behind inner door)
5 Interlock Button
(on rear of Control Panel)
This manually operated circuit breaker connects the UPS module inverter output to the UPS System Control Cabinet.
These two fuses provide power to the controls. They are normally closed (ON). Turn Control Power OFF (by opening the two fuse holders) only for maintenance procedures.
Press this button to make authorized changes to any parameter protected by the Security Access function. This includes time, date, auto-dial phone numbers, etc.
24 Operation
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Figure 9 System Control Cabinet Operator Controls (SCCB Pictured)
Item Description Function
1 UPS Output Circuit
Breaker
2 System Bypass Circuit
Breaker
3 Operator Control Panel Refer to Figure 10 for controls available on this panel.
4 Interlock Button
(on rear of Control Panel)
5 Close Bypass Switch
(behind door)
6 Bypass Reset Switch
(behind door)
7 Static Switch Disconnects
(behind door)
8 Reset Switches (SW1) for
Static Switch Disconnects (behind door)
9 Control Power Disconnect
(behind door)
This motorized circuit breaker connects the c ritical load to the UPS system output.
This motorized circuit breaker connects the critical load to the bypass line.
Refer to Figure 11.
Refer to Figure 11.
Refer to Figure 11.
These manually operated switches disconnect the static switch from the bypass line and from the critical load. They are normally ON (closed). Turn them OFF (open) only to isolate (disconnect) the static switch for maintenance procedures.
Press these two switches before closing Static Switch Disconnects when recovering from a shutdown that includes loss of Control Power. Green LED on means Control Power is available. Red LED on means Reset Switch needs to be pushed.
Normally ON. Turn OFF Control Power only when required for maintenance procedures.
Operation 25
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Figure 10 Series 600T UPS and SCC Operator Control Panels
Ite m Description (Location) Function
1 Display Screen
(SCC and modules)
2 Up
(SCC and modules)
3 Down
(SCC and modules)
4 Select
(SCC and modules)
5 Alarm Reset
(SCC and modules)
6 Voltage Adjust
(SCC only)
7 UPS
(SCC only)
8 Bypass
(SCC only)
9 Control Enable
(SCC and modules)
10 Horn Off
(SCC only)
11 Alarm Horn and
Red LED (SCC only)
12 Emergency Module
Off (SCC only)
13 Battery Trip
(modules only)
14 Output Trip
(modules only)
This screen displays all vital UPS information in one convenient location. All of the UPS monitoring functions and conditions are indicated here.
This touch-sensitive pad (button) is used to move the cursor up through various selections present on the display screen. Note that all pads on this control panel have touch-sensitive switches behind them.
Similar to the Up pad, this pad is used to move the cursor down through the various selections present on the display screen.
After choosing the desired item (with highlighted cursor) from the display screen with the Up and Down pads, pushing this pad tells the microprocessor to go to the highlighted selection.
This pad is used to c lear all of the alarm conditions that are no longer present. However, all active alarms remain in memory and on the applicable screens until they are corrected. This pad also resets the History Status Report memory buffer when held until the screen clears.
This push-to-turn knob permits adjustment of the UPS output voltage to meet load requirements or to match the bypass voltage before transferring the load to or from bypass.
This pad activates the circuits that connect the UPS to the critical load (a retransfer). When this pad is pushed (along with Control Enable), the UPS output circuit breaker closes and the bypass circuit breaker opens.
This pad activates the circuits that connect the bypass line to the critical load (a transfer). When this button is pushed (along with Control Enable), the bypass circuit breaker closes and the UPS output circuit breaker opens.
This pad must be pressed simultaneously with the UPS, Bypass, Battery Trip, or Output Trip pads to activate them.
This pad is used to silence the alarm horn after it is activated. When this switch is pressed, the alarm horn is silenced but the active and latched alarm messages remain on the screen. The alarm messages still displayed stop flashing to indicate they have been acknowledged.
This electronic horn sounds to alert nearby personnel whenever a new alarm occurs. A red LED (light emitting diode) is located in the middle of the alarm horn.
During an emergency, pressing this guarded switch will transfer the load to bypass and then shut down the UPS modules. The load will remain on bypass power. (Refer to
3.3.3 - Shutdown Procedures.)
This pad can be used (along with Control Enable) to trip the module battery disconnect (MBD) circuit breaker open (disconnecting the battery from the UPS module).
This pad can be used (along with Control Enable) to trip the module output circuit breaker open (disconnecting the module from the UPS system).
26 Operation
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Figure 11 Switches Behind SCC Control Panel Door
Item Description (Location) Function
1 Interlock Button
(on rear of Control Panel)
2 Bypass Reset Switch
(SW1, on Transfer Relay Board)
3 Close Bypass Switch
(SW1, on System Interface Board)
Press this button to make authorized changes to any site parameter protected by the Security Access function. These include the time, date, auto-dial phone number, and other site parameters.
Press this button to reset the transfer relays during start-up, after an Emergency Power Off shutdown. You must press this button before the Close Bypass Switch (Item 3).
Press this button to close the Bypass circuit breaker during a start-up procedure, if it remains open after a shutdown procedure (refer to 3.3.1 - Start-Up Procedure). Note that the Static Switch Disconnects must be OFF to reset the Bypass circuit breaker. See also Bypass Reset Switch (Item 2).
Operation 27
DISCONTINUED
Figure 12 Menu Tree
Figure 12 illustrates the primary screens that you can access through the Operator Interface Display System. The liquid crystal display (LCD) screen provides a full 80 characters by 25 lines of information for easy readability. The following subsections describe what these screens display and how and when to use them.
Module status information is available on the display screen, provided Control Power is ON, even when the UPS module is not operating. System status information is available on the SCC display screen and at local and remote terminals when at least one module is on-line or when the bypass source is available.
The screen will automatically display the Monitor/Mimic during normal operation. The System configuration screen will be displayed during start-up and whenever a system reset is required.
If a module display screen is blank, either power is not available, the Rectifier Input (RIB) circuit breaker (exter­nal to the UPS module) is open, or the Control Power s witch is OFF. If power is available and a display is blank, contact Liebert Global Services. Note that status information may be available at local and remote terminals. Use control touch pads at the SCC to manually transfer the critical load to the bypass line if the SCC display goes blank while load is on UPS (a very unlikely event).
28 Operation
DISCONTINUED
3.1.1 Master Menu Screen
The Master Menu contains the primary menu selections that monitor and control the operation of the UPS.
Figure 13 Master Menu Screens, SCC (above) and Module (below)
UP :
DOWN :
SELECT :
MASTER MENU
CURSOR UP
CURSOR DOWN
CHOOSE
MONITOR/MIMIC DISPLAY
STATUS REPORTS
SYSTEM CONF IGURATION
LIMIT SETTINGS
LOAD TRANSFER PRO CEDUR ES
MASTER MENU
MONITOR/MIMIC DISPLAY
WALK-IN DISPLAY
STATUS REPORTS
SYSTEM CONFIGURATION
LIMIT SETTINGS
START-UP PROCEDURES
SHUTDOWN PROCEDURES
METER CALIBRATION
BATTERY EQUALIZE
CUSTOMER ALARM DEFINITIONS
CURSOR UP
UP :
DOWN :
SELECT :
START-UP PROCEDURES
SHUTDOWN PROCEDURES
BATTERY TIME
METER CALIBRATION
BATTERY EQUALIZE
CURSOR DOWN
CHOOSE
From any primary screen (accessed directly from the Master Menu), pushing the Select pad once will return you to the Master Menu. From any secondary screen, pushing the Select pad twice will return you to the Master Menu.
Please note that some screens have multiple pages. However, in each case instructions appear for accessing other pages.
1. MONITOR/MIMIC DISPLAY.
This graphic mimics the power flow through the UPS system. Input voltage and current readings, battery status, UPS ratings, load readings, circuit breaker indications, system status, and alarm messages are all dis­played on this screen.
2. WAL K-IN DISPLAY (modules only).
This is a bar graph that shows DC bus voltage, input currents, and UPS module output voltage (all in percent of nominal).
Operation 29
DISCONTINUED
3. STATUS REPORTS.
This display consists of three sub-menu selections: present status, history status, and event history. These screens display data on the system’s present and past performance. They also display information about any faults that have occurred in the system and total operating hours for the controls.
4. SYSTEM CONFIGURATION.
This screen displays the current configuration of the UPS system. It also enables the operator to reset the date, time, and dial-out phone numbers. The SCC current rating can also be adjusted lower than design max­imum. The operator can view, but cannot change, any of the settings unless the Interlock (Security Access) button is pressed.
5. LIMIT SETTINGS.
This security access display shows the present UPS system alarm limit settings. The operator can view the settings, but they should not be changed without consulting Liebert Global Services.
6. LOAD TRANSFER PROCEDURES (SCC only).
This screen specifies all of the steps required to manually transfer the critical load between the UPS system and the bypass source. Comparisons of the voltage frequency, and phase synchronization of the UPS system output and the bypass line are also illustrated to aid in the transfer or retransfer procedure.
7. START-UP PROCEDURES.
This two-page screen lists step-by-step procedures to start the UPS system and the modules.
8. SHUTDOWN PROCEDURES.
This two-page screen lists the proper sequence of steps to shutdown the UPS system and the modules for maintenance or repairs. The steps instruct the operator to transfer the critical load to bypass, open the battery circuit breakers, and open the UPS module output and input circuit breakers to shut down and isolate the modules. The critical load will remain on bypass power unless circuit breakers outside the UPS system are also opened.
9. BATTERY TIME (modules only).
This graph displays the projected battery voltage drop caused by a battery discharge over time. During a period of battery discharge, the Series 600T calculates the battery time remaining based on battery rating, initial battery condition, and actual connected load. The UPS continues to update and display both rated (theoretical) and calculated time every 6 seconds. This enables the operator to immediately see the effects of load shedding on time remaining and to accurately assess his power resources.
10. METER CALIBRATION.
This security access screen enables an authorized Liebert field-service engineer to adjust and calibrate the UPS metered functions. The operator can view, but should not change, any of the settings
11. BATTERY EQUALIZE.
The battery equalize screen lets the operator change the battery equalize recharging mode from manual to automatic and to observe or change the equalize time. Battery equalize charge voltage is higher than battery float (constant) charge voltage.
12. CUSTOMER ALARM DEFINITIONS (SCC only).
This optional screen allows the operator to define alarms for conditions external to the UPS, battery, or switchgear.
30 Operation
NOTE
Do not use battery equalize charging with sealed-cell batteries. Refer to the battery manufacturer’s manual for specific information about equalize charging.
DISCONTINUED
3.1.2 Monitor/Mimic Display Screen
From SCC Master Menu move the highlighted cursor to MONITOR/MIMIC DISPLAY. Press the Select pad and the Monitor/Mimic screen is displayed.
The Monitor/Mimic display screen is a simplified block diagram of the UPS system. This screen gives the oper­ator an overall view of the power flow through the UPS system. The screen consists of three major sections: the input/UPS metering section, the load metering section, and the status and alarm message areas. The metered parameter values on the Monitor/Mimic screen are updated at one-second intervals.
Figure 14 SCC Monitor/Mimic Display Screen
4
LOAD
627 KVA / 502 KW
3
7
6
A BC
755A 755A 755A
3 OF 3 MODULES
CONNE CTED
REDUNDANT
BYPASS INPUT
A-B B-C C-A
480V 480V 480V
60.0 Hz
UPS INP UT PWR
A-B B-C C-A
480V 480V 480V
MOD 1 ON LINE MOD 2 ON LINE MOD 3 ON LINE
1
2
5
UPS RATINGS
SCCB 1600
OUTPUT VOLTAGE
A-B B-C C-A
480V 480V 480V
60.0 Hz
OK to Transfer Static Switch Connected
Input Metering Displays
NOTE
All voltage readings are phase-to-phase measurements (A-B, B-C, and C-A). All
current readings are phase measurements (A, B, and C).
Item 1 - Bypass Input. This block displays the bypass input voltage and the bypass input frequency. The System Bypass Breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.
Item 2 - UPS Input Pwr. This block displays the input voltage to the UPS modules.
Output Metering Displays
Item 3 - UPS Ratings. T he SCC current rating is specified at the top of this block. The UPS system output volt­age and frequency are also displayed in this block. The UPS Output Breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.
Item 4 - Load. This block displays the total output power to the critical load in kVA and kW. The critical load current per phase is also displayed in this block. Note that kW is not displayed when the load is on the bypass line.
The load block also indicates the number of modules connected and whether the UPS system is operating in the redundant or non-redundant mode.
During an overload condition, the time remaining before shutdown or transfer is displayed at the bottom of the load box.
Operation 31
DISCONTINUED
Status/Alarm Message Areas
The status/alarm message areas display vital information a bout the operation of the UPS system. During normal operation no alarm messages should be present. Changes in the status of the system and possible alarm condi­tions can be monitored. Both the status and the alarm messages are displayed in reverse video (highlighted— light on dark). The alarm messages continue flashing until the Horn Off pad is pressed. To clear a latching alarm, you must also press the Ala rm Reset pad after the alarm condition is corrected.
NOTE
The Alarm Reset pad also resets the History Status Report memory buffer when it is held for 15 seconds (or until the screen clears).
The following lists show the status and alarm messages that m ay be displayed in these areas. For more informa­tion and the corrective actions for these messages, refer to Tabl e 1 in this section.
Item 5 - Module Status Messages
Module On Line Module Off Line Module Summary Alarm Module Communication Failure
Item 6 - System Status Messages
Static Switch Connected Static Switch Disconnected OK To Transfer Not OK To Transfer
Item 7 - Alarm Messages
Load On Bypass Auto Retransfer Pr imed Manual Reset/Retransfer Static Switch Unable Bypass Not Available Bypass Phase Sequence Wrong
Control Power Fail Output Over/Under Frequency Output Under-Voltage Output Over-Voltage Overload Overload Transfer Emergency Off
Module Summary Alarm Battery Cycle Buffer Warning
32 Operation
DISCONTINUED
From module Master Menu move the highlighted cursor to MONITOR/MIMIC DISPLAY. Press the Select pad and the Monitor/Mimic screen is displayed.
The Monitor/Mimic display screen is a simplified block diagram of the UPS module and power connections. This screen gives the operator an overall view of the power flow through the UPS module. The screen consists of three major sections: the input/UPS metering section, the load metering section, and the status and alarm mes­sage areas. The metered parameter values on the Monitor/Mimic screen are updated at one second intervals.
Figure 15 Module Monitor/Mimic Display Screen
UPS RATINGS
AP648-84
RAT E D 40 0 KVA
OU TP U T V OLTA G E
A-B B-C C-A
480V 480V480V
UPS INPUT PWR
A-B B-C C-A
480V
480V
350A
350A
BATTERY
VOLTS 540 AMPS 15 CHARG
480V
350A
1
2
60.0 Hz
4
LOAD
270 KVA/217 KW
3
A BC
325A
325A
325A
5
NOTE
All voltage readings are phase-to-phase measurements (A-B, B-C, and C-A). All
current readings are phase measurements (A, B, and C).
Input Metering Displays
Item 1 - UPS Input Pwr. This block displays the UPS module input voltage and current. The Module Input breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.
Item 2 - Battery. The battery block displays the DC bus voltage and the charge or discharge current to or from the battery. This block reads MODULE DC BUS when the battery circuit breaker is open and BATTERY when the battery circuit breaker is closed during normal operation. This block reads BATTERY EQUALIZE when the battery equalize charge voltage is used to recharge the battery. The Module Battery Disconnect (MBD) is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.
Output Metering Displays
Item 3 - UPS Ratings. T he module part number and kVA rating are specified at the top of this block. The UPS output voltage and frequency are also displayed in this block. The Module Output breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.
Item 4 - Load. This block displays the module output power to the critical load in kVA and kW. The critical load current per phase is also displayed in this block.
Operation 33
DISCONTINUED
Alarm Messages
The alarm message area displays vital information about the operation of the UPS system. During normal opera­tion no alarm messages should be present. Alarm conditions can be monitored. The a larm messages are dis­played in reverse video (highlighted— light on dark). To clear a latching alarm, you must also press the Alarm
Reset pad after the alarm condition is corrected.
NOTE
The Alarm Reset pad also resets the History Status Report memory buffer when it is held for 15 second (or until screen clears).
The following list shows the alarm messages that may be displayed in this area. For more information and the corrective actions for these messages, refer to Ta b l e 1 in this section.
Item 5 - Alarm Messages
Input Fail DC Ground Fault
DC Capacitor Fuse Blown Battery CB Open Battery Discharging Low Battery Warning
Low Battery Shutdown DC Over-Voltage Shutdown
Control Power Fail
Inverter Non-Synchronized Overload Overload Shutdown Reverse Power
Rectifier Fuse Blown Inverter Fault Hardware Shutdown Emergency Off
Ambient Over-Temperature Blower Failed Equipment Over-Temperature
Over-Temperature Timeout
34 Operation
DISCONTINUED
Figure 16 through Figure 20 illustrate how the Monitor/Mimic Display screens on the SCC and on a module depict the power flow through the UPS system.
A three module system designed for redundant operation is shown. A multi-module UPS system may include up to six (6) modules for each System Control Cabinet (SCC).
Figure 16 Monitor/Mimic Display Screen Examples: Normal Power Flow, SCC (above) and Module
BYPASS I NPUT
A-B B-C C- A
480V480V
60.0 Hz
UPS INPUT PWR
A-B B-C C-A
A-B B-C C-A
480V480V
MOD 1 ON LINE MOD 2 ON LINE MOD 3 ON LINE
UPS INPUT PWR
A-B B-C C-A
480V 480V
350A
BATTERY
VOLTS 540 AMPS 15 CHARG
480V
480V
480V 350A350A
UPS RATINGS
SCCB 16 00
OU TP U T V OLTA G E
A-B B-C C-A
480V
480V 480V
60.0 Hz
OK to Transfer Static Sw itch Connected
UPS RATINGS
AP648-84
RAT E D 40 0 KVA
OU TP U T V OLTA G E
A-B B-C C-A
480V 480V
480V
60.0 Hz
LOAD
627 KVA/502 KW
A BC
A BC
755A
3 OF 3 MODULES
CONNE CTED
REDUNDANT
270 KVA/217 KW
A BC
410A
755A
LOAD
410A
755A
410A
Operation 35
DISCONTINUED
Figure 17 Monitor/Mimic Display Screen Examples: Utility Fail, SCC (above) and Module
BYPASS INPUT A-B B-C C-A 0V 0V 0V
0 Hz
UPS INPUT PWR
A-B B-C C-A
0V 0V 0V
MOD 1 ON LINE SUM ALM MOD 2 ON LINE SUM ALM MOD 3 ON LINE SUM ALM
UPS INPUT PWR
A-B B-C C-A
0V 0V 0V
0A 0A 0A
BATTERY
VOLTS 480 AMPS 645 DISCHARG
UPS RATINGS
SCCB 16 00
OUTPUT VOLTAGE
A-B B-C C-A
480V 480V
480V
60.0Hz
Not OK to Transfer Static Switc h C onnected
UPS RATINGS
AP648-84
RATED 400 KVA
OU TP U T V OLTA G E
A-B B-C C-A
480V 4 80V
480V
60.0 Hz
Not OK to Transfer Static Sw itch Connected
LOAD
627 KVA / 5 02 KW
A BC
755A 755A 755A
3 OF 3 MODULES
CONNECTED
REDUNDANT
Byp Not Ava il Static Sw Unable Module Sum Alm
LOAD
270 KVA/217 KW
A BC
Input Fail Batt Discharging
325A325A325A
36 Operation
DISCONTINUED
Figure 18 Monitor/Mimic Display Screen Examples: Load on Bypass, UPS Modules On and Charging
Battery, SCC (above) and Module
BYPASS INPU T
A-B B-C C-A
480V 480 V 480V
60.0 Hz
UPS INPUT PWR
A-B B-C C-A
A-B B-C C-A
480V
480V
MOD 1 ON LINE MOD 2 ON LINE MOD 3 ON LINE
UPS INPUT PW R
A-B B-C C-A
480V
90A 90A
90A
BATTERY
VOLTS 540 AMPS 75 CHARG
480V
480V480V
UPS RATINGS
SCCB 16 00
OUTPUT VOLTAGE
A-B B-C C-A
OK to Transfe r Static Swit ch Connected
480V480V
60.0 Hz
480V
UPS RATINGS
AP648-84
RATED 400 KVA
OUTPUT VOLTAGE
A-B B-C C- A
480V
480V
480V
60.0 Hz
LOAD
627 KVA / 50 2 KW
A BC
A BC
755A
755A
3 OF 3 M ODULES
CONNE CTED
REDUNDANT
Load On Bypass
LOAD
0 KVA / 0 KW
A BC
0A 0A 0A
755A
Operation 37
DISCONTINUED
Figure 19 Monitor/Mimic Display Screen Examples : Loa d on UPS, One UPS Module Off Line
SCC (above) and Module
LOAD
BYPASS INPUT
A-B B-C C-A
480V
UPS INPUT PWR
UPS INPUT PWR A-B B-C C-A
A-B B-C C- A
380V
480V
75A
MOD 1 ON LINE MOD 2 OFF LIN E SUM ALM
VOLTS 540 AMPS 75 CHARG
MOD 3 ON LINE
BYPASS IN PUT A-B B-C C-A
380V
UPS I NPUT PWR
UPS I NPUT PWR
UPS INPUT PW R A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
380V
380V
75A
MOD 1 O N LINE MOD 2 OFF LINE SUM ALM
VOLTS 54 0
VOLTS 54 0
MOD 3 O N LINE
AMPS 75 CHARG
AMPS 15 CHARG
480V
60.0 Hz
380V
480V
75A
BATTERY
380V
50.0 Hz
480V480V
380V
380V
75A
BATTERY
BATTERY
480V
380V
480V
75A
380V
380V
480V
380V
405A405A405A
75A
UPS RATINGS
UPS RATINGS
AP658-71
SCCB 1600
RATED 500 KVA
OUTPUT VOLTAGE
OUTPUT VOLTAGE
A-B B-C C-A
A-B B-C C-A
OK to Transfer Static Switch Connec ted
RAT E D 50 0 KVA
RATED 400 KVA
OUTPUT VOLTAGE
OUTPUT VOLTAGE
OUTPUT VOLTAGE
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
480V
OK to Transfer Static Switch Connected
380V380V
380V
340V480V480V
50.0 Hz
60.0 Hz
UPS RATINGS
UPS RATINGS
UPS RATINGS
AP648-84
AP658-71
SCCT 1600
380V380V
380V
480V
480V
380V380V380V
50.0 Hz
60.0 Hz
50.0 Hz
Module Sum Alm
LOAD
627 KVA / 502 KW
0 K VA / 0 K W
A BC
A BC
0A 0A 0A
755A
2 OF 3 MODUL ES
CONNECTED
NON-RE DUNDANT
LOAD
LOAD
LOAD
0 KVA / 0 KW
314 KVA / 251 KW
627 KVA / 502 KW
A BC
A BC
A BC
0A 0A 0A
378A 378A 378A
953A
2 OF 3 MODULES
CONNECTED
NON-REDUNDANT
Module Sum Alm
755A755A
953A953A
38 Operation
DISCONTINUED
Figure 20 Monitor/Mimic Display Screen Examples: Load on Bypass, All UPS Modules Off Line
LOAD
BYPASS INPUT A-B B-C C-A
480V
UPS INPUT PWR
UPS INPUT PWR
A-B B-C C-A
A-B B-C C- A
380V
480V
75A
MOD 1 OFF LINE SUM ALM MOD 2 OFF LIN E SUM ALM
VOLTS 540 AMPS 75 CHARG
MOD 3 OFF LINE SUM ALM
BYPASS INPU T
BYPASS INPU T
A-B B-C C-A
A-B B-C C-A
380V 380V 380V
UPS INP UT PWR
UPS INP UT PWR
UPS INP UT PWR
UPS INP UT PWR
UPS INP UT PWR
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
380V
480V 480V 480V
380V 380V 380V
380V
75A
0A 0A 0A
MODULE DC BUS
MOD 1 O N LINE
MOD 1 OFF LINE SUM ALM
VO LT S 0
VO LTS 5 4 0
VO LTS 5 4 0
MOD 2 OFF LINE SUM ALM
MOD 2 OFF LINE SUM ALM
AMPS 0
MOD 3 O N LINE
MOD 3 OFF LINE SUM ALM
AMPS 75 CHARG
AMPS 15 CHARG
480V
60.0 Hz
380V
480V
75A
BATTERY
380V380V
50.0 Hz
50.0 Hz
380V380V
380V
75A 75A
BATT ER Y
BATT ER Y
480V
380V
480V
75A
380V
380V380V
380V
380V
455A455A45 5A
UPS RATINGS
UPS RATINGS
AP658-71
SCCB 1600
RATED 500 KVA
OUTPUT VOLTAGE
OUTPUT VOLTAGE
A-B B-C C-A
A-B B-C C-A
Not OK to Transfer Static Switch Connec ted
RATED 500 KVA
RAT E D 3 75 KVA
RAT E D 5 00 KVA
OUT PU T V OLTA G E
OUT PU T V OLTA G E
OUT PU T V OLTA G E
OUT PU T V OLTA G E
OUT PU T V OLTA G E
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
A-B B-C C-A
380V
380V
0V 0V 0V
0V 0V 0V
380V
Not OK to Transfer
OK to Transfer Static Switc h Connected
Static Switc h Connected
380V380V
380V
50.0 Hz
0 Hz
UPS RATINGS
UPS RATINGS
UPS RATINGS
UPS RATINGS
UPS RATINGS
AP658-71
AP646-84
SCCT 1600
AP658-71
SCCT 1600
380V
380V
380V
380V
380V380V
380V
50.0 Hz
0 Hz
0 Hz
50.0 Hz
50.0 Hz
0V0V0V
Load on Bypass Static Sw Unabl e Module Sum Alm
LOAD
627 KVA / 502 KW
0 K VA / 0 K W
A BC
A BC
0A 0A 0A
755A
0 OF 3 MODUL ES
CONNECTED
NON-RE DUNDANT
LOAD
LOAD
LOAD
LOAD
LOAD
627 KVA / 5 02 KW
0 K VA / 0 K W
314 KVA / 2 51 KW
0 K VA / 0 K W
62 7 K VA
A BC
A BC
A BC
A BC
A BC
953A 953A 9 53A
0A 0A 0A
477A 477A 477A
0A 0A 0A
953A
2 OF 3 MODULES
0 OF 3 MODULES
CONNE CTED
CONNE CTED
NON-REDUNDANT
NON-REDUNDANT
Input Fail
Modu le Sum Al m
Load On Bypass
Batt CB O pen
Static Sw Unab le Modu le Sum Al m
755A755A
953A953A
Operation 39
DISCONTINUED
3.1.3 Walk-In Display Screen
From the module Master Menu, highlight WALK-IN DISPLAY and then press the Select pad. Note that this screen is displayed at the UPS modules but is not required at the System Control Cabinet (SCC).
Figure 21 Walk-In Display Screen During Start-Up
DOWN :
SELECT :
D.C. VOLTS
INPUT AM PS
OUTPUT VOLTS
0% 25% 50% 75% 100%
SELECT :
MASTER MENU
The Walk-In Display screen enables the operator to monitor the UPS module DC bus voltage, the input currents, and the output voltage. This is important during the start-up procedures.
During start-up, the UPS module input circuit breaker is closed and power is applied to the UPS module. The Walk-In Display screen graphically shows the voltage increasing on the DC bus as the UPS module rectifier begins to walk-in.
The DC Volt s bar gradually moves to the right. After the D C Vol t s bar reaches the 90% level, the UPS module inverter starts-up and the Output Volts bar also moves to the right. Both the DC Volts and the Output Volts bars should settle near the 100% line as t he UPS module becomes fully energized.
The three Input Amps bars (one for each phase of input current) move to the right during the initial transformer inrush. They should return to the left after the momentary inrush has subsided, then increase to about 10% as the DC Volts increase.
Modules equipped with the optional input filter will indicate more than 10% with no connected load.
NOTE
After the critical load is transferred from the bypass line to the UPS modules, the Input Amps bars continue to indicate the percent of the design input current to the UPS module rectifier.
If any Input Amps bar differs from the average bar length by more than 10%, call Liebert Global Services.
40 Operation
DISCONTINUED
3.1.4 Status Reports Screens
Go to the Master Menu and move the highlighted cursor to STATUS REPORTS. Press the Select button and the Status Reports screen is displayed.
The Status Report screen is divided into four submenu reports: PRESENT STATUS, EVENT HISTORY, HISTORY STATUS, and SYSTEM STATUS.
To look at any of the reports, do the following:
1. From the Status Reports screen, press the Up or Down pad to move the highlighted cursor to the desired
selection.
2. Press the Select pad to view the desired report page.
3. Use the Up and Down pads to move through a report that includes several screens (frames).
4. Press the S elect pad to exit the report.
5. To return to the Master Menu, return to EXIT and press the Select pad.
Each report screen includes the date, time, and a frame number. The frame number indicates the relationship sequence of a 4 millisecond time segment. The SCC and each module generate their own frame numbers inde­pendently. The clock in each module is synchronized to the SCC clock.
NOTE
Each of the four Status Reports can be displayed on a remote terminal. Refer to
3.1.14 - Communication Interfaces.
Figure 22 Status Reports Screen
EXIT
PRESENT STATUS
EVENT HISTORY
HISTORY STATUS
SYSTEM STATUS
UP :
DOWN :
SELECT :
CURSOR UP
CURSOR DOWN
CHOOSE
Operation 41
DISCONTINUED
Present Status
The Present Status screen shows the current status of the UPS system (SCC) or module. This screen displays any alarm messages that are present and the values of the metered parameters for each cabin e t. Battery values are dis­played only at the UPS modules.
Each update sequence (every 4 milliseconds) is called a frame. The frame number is displayed in the upper right corner. The Present Status screen display is updated every two seconds.
Battery Time Remaining (in minutes) is displayed on the module screens during a battery discharge. The value is on the Battery Volts line in the TIME column (far right side of the screen). For the first two minutes of discharge, the Rated Time Remaining is displayed. After that, the Calculated Time Remaining is displayed, and updated every six seconds.
All the information on this screen, including Battery Time Remaining, is available to a local terminal or modem through the communications ports provided in the Series 600T UPS. Refer to Ta b l e 3 in this manual for key­board commands to use with the communication ports.
Figure 23 Present Status Report Screens, SCC (above) and Module
PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35
ORDER - 000000 SIT E ID - 00000 SITE TAG - 0000000
**** ACTIVE ALARMS **** Batt Discharging
OUTPUT VOLTS OUTPUT AMPS OUTPUT FREQUENCY LOAD KVA BYPASS VOLTS
END OF REPO RT
480 325
A
B 480 325
0
0
C 480 325
0
DC
LOAD
270
HERTZ
60.0
TIME
0:06
SELECT :
PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35
PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35
ORDER - 000000 SITE ID - 00 000 SITE TAG - 000000 0
ORDER - 000000 SITE ID - 00 000 SITE TAG - 000000 0
**** ACTIVE ALARMS **** Batt Discharging
**** ACTIVE ALARMS **** Batt Discharging
DC
DC
480
-645
LOAD
LOAD
270
270
OUTPUT VOLTS
OUTPUT VOLTS OUTPUT AMPS
OUTPUT AMPS OUTPUT FREQ UENCY
OUTPUT FREQ UENCY LOAD KVA
BATTERY VOLTS BYPASS VOLTS
BATTERY AMPS INPUT VOLTS END OF REPORT
INPUT AMPS LOAD KVA
END OF REPORT
A
A
380
480 410
325
C
C
B
B
480
380
480
380
325
410
325
410
0
0
0 0 0
0
0
0
0
EXIT
HERTZ
HERTZ
60.0
50.0
EXITSELECT :
EXITSELECT :
TIME
TIME
0:09
0:06
42 Operation
DISCONTINUED
Event History
The Event History screen lists the active alarms present in the UPS system (SCC) or modules. This screen also displays the prior 128 alarm frames, in a first-in first-out (FIFO) sequence, that have taken place along with the date and the time that each alarm frame occurred. Use the Up and Down pads to look through the different alarm frames.
Figure 24 Event History Report Screen
PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35
PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35
EVENT HISTORY MODULE-0 01/17/98 15:06:41 FRAME 175
ORDER - 000000 SIT E ID - 00000 SITE TAG - 000000 0
ORDER - 000000 SIT E ID - 00000 SITE TAG - 000000 0
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000
**** ACTIVE ALARMS **** Batt Discharging
**** ACTIVE ALARMS **** Batt Discharging
**** ACTIVE ALARMS **** Batt Dischar ging Low Batt Warning
OUTPUT VOLTS
OUTPUT VOLTS OUTPUT AMPS
OUTPUT AMPS OUTPUT FREQUENCY
OUTPUT FREQUENCY LOAD KVA
BATTERY VOLTS BYPASS VOLTS
BATTERY AMPS INPUT VOLTS INPUT AMPS
END OF REPORT LOAD KVA
END OF REPORT
380
380 410
410
380
380
380 410
410
380
B
B
410
410
0
0 0
0
0
0
A
A
0 0 0
C
C
480
-480
DC
DC
LOAD
LOAD
270
270
SELECT :
SELECT :
SELECT :
50.0
50.0
UP :
DOWN :
HERTZ
HERTZ
NEXT FRAME
PREVIOUS FRAME
EXIT
EXIT
EXIT
0:09
0:06
TIME
TIME
Operation 43
DISCONTINUED
History Status
The History Status screen displays 64 frames, of 4 milliseconds each, from the Present Status screen. Note that the values for output volts and amps are updated once each millisecond. Alarms are listed in the sequence they occurred, within 1 millisecond resolution. The frames are stored in a buffer (a computer information storage technique). The buffer stores the frames in a first-in first-out sequence. As a new frame enters the buffer the old­est one is released.
When a designated fault occurs (see list below), the buffer stores information for the next 24 frames and then freezes (stops gathering information). At that time, the History Status screen contains 40 frames before the fault, the fram e when the fault occurred, and 23 frames after the fault. This 64-page report is a very useful diagnostic tool for the operator or Liebert Global Services. Use the Up and Down pads to view the screens.
Figure 25 History Status Report Screens
HISTORY STATUS MODULE-0 04/10/97 1 6:49:21 FRAME 36 ORDER - 000000 SITE ID - 00000 SITE TAG - 0000 000
**** ACTIVE ALARMS **** Output Ov-volts
OUTPUT VOLTS OUTPUT AMPS OUTPUT FREQUENCY LOAD KVA BYPASS VOLTS
A 480 420
480
B 480 420
480
480 420
480
DC
C
349
SELECT :
UP :
DOWN :
HERTZ
60.0
NEXT FRAME
PREVIOUS FRAME
EXIT
TIMELOAD
HISTORY STATUS MODULE-0 04/10/97 16:49:21 FRAME 36
HISTORY STATUS MODULE-0 01/17/98 11:21:5 9 F RAME 10 0
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000 **** ACTIVE ALARMS **** Output Ov-volts
**** ACTIVE ALARMS *** * Batt Discharging Low Batt Warning
DC
OUTPUT VOLTS
OUTPUT VOLTS OUTPUT AMPS
OUTPUT AMPS OUTPUT FREQ UENCY
OUTPUT FREQ UENCY LOAD KVA
OUTPUT VOLTS BYPASS VOLTS
OUTPUT AMPS BATTERY VOLTS OUTPUT VOLTS OUPUT AMPS BATTERY AMPS INPUT VOLTS INPUT AMPS OUPUT VOLTS OUTPUT AMPS LOAD KVA
380
480 530
325
480 380
325
480 325
480 325
A
B
A
B
380
480 530
325
480 380
325
480 325
0
0
0
0 480 325
C
C
380
480 530
325
480 380
325
480 325
0
0 480 325
DC
390
-645
LOAD
349
270
HERTZ
HERTZ
50.0
60.0
UP :
UP :
DOWN :
DOWN :
SELECT :
SELECT :
TIMELOAD
TIME
0:01
NEXT FRAME
NEXT FRAME
PREVIOUS FRAME
PREVIOUS FRAME
EXIT
EXIT
44 Operation
DISCONTINUED
The alarm conditions that cause the History Status buffer to stop gathering new data are:
SCC Module
Auto Transfer to Bypass DC Cap Fuse Blown
Output Over-Voltage DC Over-Voltage Shutdown
Output Under-Voltage Inverter Fault
Overload Transfer Low Battery Shutdown
Overload Shutdown
Over-Temperature Timeout
Rectifier Fuse Blown
Reverse Power
Note that the Emergency Off alarm will also freeze the SCC History Status buffer with the Auto Transfer to Bypass alarm (if the load is on the UPS system when the alarm condition occurs).
The History Status buffer does not resume collecting new frames until the fault is cleared and the Alarm Reset pad is pressed for 15 seconds (or until the screen clears).
Operation 45
DISCONTINUED
System Status
The System Status screen displays the module Total Operating Hours and the Battery Cycle Monitor.
Battery Cycle Monitor (Module Only)
Selecting the Battery Cycle Monitor gives you access to detailed information about the module’s most recent battery discharge events. Periodic review of this data can give a good indication of battery performance and expected life.
Each battery discharge cycle is put into one of four categories, depending on the length of the event:
• 0-30 Seconds Discharge
• 31-90 Seconds Discharge
• 91-240 Seconds Discharge
• Over 240 Seconds Discharge
Each discharge cycle is sorted by time duration and tagged with the following system parameters:
• System time and date
• Event Number
• Duration of cycle (seconds)
• Lowest DC Bus Voltage
• Highest DC Bus Current
• kW carried by the batteries at the start of cycle
• Battery Environment Ambient Temperature (when equipped with optional temperature sensor)
Up to 132 discharge cycle events can be stored at any given time. When the buffer approaches its capacity, a warning message is broadcast via terminal and modem communication channels and a complete listing of all records (in order of occurrence) is sent to the terminal port. If a serial printer is attached to the terminal port, the operator can print a hard copy of the report. If a printer is not available, a terminal emulation program can cap­ture the report to disk for later review or printing. Once the buffer is filled, new data will replace the old on a First In, First Out basis as new cycles occur.
To view this data, select the BATTERY CYCLE MONITOR option on the System Status screen. At the next screen (see Figure 26), you can select either the Battery Cycle Monitoring Summary screen or a screen showing detailed information on any one of the four categories of discharge (0-30 seconds, 31-90 seconds, 91-240 sec­onds and Over 240 seconds).
Figure 26 Battery Cycle Monitor Screen
EXIT
EXIT
Battery Cycle Monitor
Battery Temperature
Battery Cycle Monitoring Summary
0-30 Seconds Discharge
31-90 Seconds Discharge
91-240 Seconds Discharge
Over 240 Seconds Discharge
Total Since 02/4/95
The Summary screen (Figure 27) shows Total Number of Discharge Cycles, Accumulated Battery Time, Accu­mulated Battery Amp Hours, Accumulated Battery Kilowatt Hours, and Battery Temperature. During a battery discharge event, the screen changes to show information about the present discharge cycle. The screen displays
...............................................
...............................................
................................
................................
................................
................................
UP :
DOWN :
SELECT :
Enable
Enable
CURSOR UP
CURSOR DOWN
CHOOSE
11
5
2
1
19
46 Operation
DISCONTINUED
Active Cycle Time in place of Accumulated Battery Time, and shows Active Battery AH and Active Battery kWH instead of accumulated values.
Figure 27 Battery Cycl e Monitoring Summary Screen
Battery Cycle Monit oring Summary
EXITSELECT :
TotalNo.ofCycles.............
Accumulated Battery Time . . . . . . .
AccumulatedBatteryAH ........
Accumulated Battery KWH . . . . . . .
BatteryTemperature............
7 15 min. 32 sec. 71 34 25°C / 77°F
Figure 28 shows a typical detail screen for the 91-240 Seconds Discharge category. This information can be col­lected remotely, through the optional communications board and modem, by a remote terminal or a personal computer equipped with a modem and communications program. See 3.1.14 - Communication Interfaces for more information.
NOTE
This information is applicable to systems with separate batteries for each module. If the modules share a common battery, select one module to do the monitoring and disregard the other(s).
Figure 28 Typical Data on Discharge Cycles of 91 to 240 Seconds Duration During the Recording
Period
CURSOR UP
UP :
CURSOR DOWN
CHOOSE
Total 91-240 se c. Cycl 5
DOWN :
SELECT :
EXIT
Event Date Time Duration Min. Vol t Max. Amp Start KW Start Temp
15 4/12/95 10:31 235 477 110 70 68 12 3/25/95 20:21 98 479 97 37 65
9 3/13/95 7:35 139 467 173 69 67 5 2/07/95 17:22 199 478 95 40 70 2 11/24/94 12:33 95 477 83 39 69
Operation 47
DISCONTINUED
3.1.5 System Configuration Screens
Go to the Master Menu and move the highlighted cursor to SYSTEM CONFIGURATION. Press the Select pad and the System Configuration screen is displayed.
The System Configuration screen lists parameters that can be changed to adjust the “personality” of your UPS modules and the SCC to your site requirements. Some of the information displayed is factory set and should only be changed by Liebert Global Services. Parameters that should be adjusted by the user include date, time, auto dial number, and modem baud rate.
The System Configuration screen is one of the displays that has controlled access to limit who is able to change site parameters. This type of screen is called a Security Access screen. This controlled access feature allows any­one to review the present parameters, but limits access for making changes. When you see Security Access dis­played on the screen (upper left corner), to make authorized changes you must open the control cabinet door (key required) and push the Interlock button on the back of the control panel (Figure 11). Close and lock the control cabinet door after making authorized changes.
Figure 29 SCC System Configuration Screen
SECURIT Y ACCESS
EXIT
Part Number .......................................
Order Number ....................................
Site ID Number ..................................
Site TAG Number ..............................
System Number .................................
Number of Modules in System ..........
Date ...................................................
Time ...................................................
Auto Dial ............................................
Max Auto-Rexfer Attempts ................
System Current Rating ......................
System Options
SYSTEM CONFIGURATION
DOWN :
SELECT :
02-791112-14 000000 00000 0000000 1 2 01/17/96 14:51:59 YES 5 1600
UP :
CURSOR UP
CURSOR DOWN
CHOOSE
NOTE
If you accidentally set a site parameter digit to a wrong value, you must return to the System Configuration screen and go again to your desired screen.
Part Number. This is a factory set part number of the UPS cabinet which determines many internal operating parameters. It cannot be changed.
Order Number. This is a factory set number to identify your particular installation.
System Number. This number is used to identify one or more UPS systems that may be present on one site.
Number of Modules in System. This shows the total number of modules.
48 Operation
DISCONTINUED
Date
This is the system’s real-time date setting. The system control program sends to each module the date entered at the System Control Cabinet (SCC). You cannot change the system date from the control panel of a UPS module.
Figure 30 Date Screen
To reset the date, do the following at the SCC.
1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to DAT E.
2. Press the Select pad. The Date screen will appear.
3. Press the Select pad to move t he arrow to the next digit to the right.
4. When the arrow is on the digit to be changed, press the Up pad to increase the number or the Down pad to decrease it. Press Select to set the value and move to the next digit.
5. After the correct month/day/year has been set, press the Select pad again to return to the System Configuration screen.
UP :
DOWN :
SELECT :
DATE
01/17/96
INCREASE VALUE
DECREASE VALUE
WALK-THRU/ EXIT
NOTE
Precise Date and Time functions are required for accurate archive and event history purposes.
Both the Date and Time can be set from a remote terminal. Refer to 3.1.14 - Communication Interfaces.
All Liebert Series 600T products can handle dates past the year 2000.
Operation 49
DISCONTINUED
Time
This is the system’s real-time clock. The system control program sends to each module the time entered at the System Control Cabinet (SCC).
You cannot change the system time from the control panel of a UPS module.
Figure 31 Time Screen
SELECT :
To reset the time do the following at the SCC:
UP :
DOWN :
TIME
09:15:00
INCREASE VALUE
DECREASE VALUE
WALK-THRU/ EXIT
1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Time.
2. Press the Select pad. The Time screen will appear.
3. Press the Select pad to move t he arrow to the next digit to the right.
4. When the arrow is on the digit to be changed, press the Up or Down pad to increase or decrease the hour/ minute/second number. Press Select to set the value and move to the next digit.
5. After the correct hour/minute/second has been set, press the Select pad again to return to the System Configuration screen.
NOTE
Precise Date and Time functions are required for accurate archive and event history purposes.
Both the Date and Time can be set from a remote terminal. Refer to 3.1.14 - Communication Interfaces.
50 Operation
DISCONTINUED
Auto Dial
This is a feature that automatically dials (through a customer supplied PC-compatible modem) a pre-pro­grammed telephone number (up to 12 digits) when specified alarm conditions occur within the UPS system. The connection for the modem is at the SCC. Automatic dial attempts to the first number are made at periodic inter­vals for 30 minutes. If unanswered, the system rolls over to the second number and repeats the process until con­nection is made.
Upon connection, the system transmits data, in RS-232C format, that includes the system identification code, the present alarm message(s) and the time that the alarm(s) occurred. Refer to 3.1.14 - Communication Interfaces.
Refer to the Special Functions column in Tab le 1 to see which alarm messages will initiate an auto-dial call.
Figure 32 Auto Dial Setting Screen
EXIT
Enable Auto Dial .....................................
Modem Baud Rate ..................................
Auto Dial Number ...................................
Second Number ...............................
Modem Initialization String .....................
AUTO DI AL SETTING SCREEN
UP :
DOWN :
SELECT :
YES 2400 1 800 555 - 1234 0 000 000 - 0000 xxxxxxxxxxxxxxxxxxx
CURSOR UP
CURSOR DOWN
CHOOSE
If the auto-dial numbers were specified at time of order or installation, the numbers are pre-programmed into the system. However, if the numbers need to be changed, follow the steps listed below to reprogram the auto-dialer at the SCC.
1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Auto
Dial.
2. Press the Select pad. The Auto Dial screen will appear.
3. Move to and select the first Auto Dial Number.
4. Press the Select pad to move t he arrow to the next digit to the right.
5. When the arrow is on the digit to be changed, press the Up pad to increase the number or press the Down
pad to decrease it. Press Select to set the value and move to the next digit.
6. After all of the changes have been made, press the Select pad again to return to the System Configuration
screen.
7. If required, go to the Second Number screen and enter the correct number.
Operation 51
DISCONTINUED
Modem Baud Rate
This sets the transmission rate at which the system relays data to a terminal through the modem.
Figure 33 Modem Baud Rate
To change the modem baud rate, do the following at the SCC:
1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Auto
Dial.
2. Move to and select the Modem Baud Rate.
3. Press the Up or Down pad to display the desired baud rate.
4. Press the Select pad to set the baud rate and to return to the System Configuration screen.
EXIT
Enable Auto Dial .....................................
Modem Baud Rate ..................................
Auto Dial Number ...................................
Modem Initialization String .....................
AUTO DI AL SETTING SCREEN
Second Number ...............................
UP :
DOWN :
SELECT :
YES 2400 1 800 555 - 1234 0 000 000 - 0000 xxxxxxxxxxxxxxxxxxx
CURSOR UP
CURSOR DOWN
CHOOSE
52 Operation
DISCONTINUED
Maximum Auto-Retransfer Attempts
When a UPS output overload condition exceeds a pre-programmed current-versus-time window (based on the SCC current rating), the UPS automatically transfers the critical load to the bypass line. After the overload condi­tion has been corrected, the UPS attempts to automatically retransfer the critical load to the UPS output (unless zero attempts is selected). The Maximum Auto-Retransfer Attempts limits the number of times (0 to 5) that the UPS attempts to retransfer the load back to the UPS within a one-hour time period.
If more than the selected number of overloads occurs during one hour, the critical load remains on the bypass line and must be manually retransferred to the UPS system. Note that you should determine the cause of any overload condition.
Note that automatic retransfers are initiated only if the critical load was transferred to the bypass line because of a system overload. If an automatic transfer to bypass occurred for any other reason, an automatic retransfer will not be initiated. Refer to 3.4.3 - Automatic Retransfers to UPS.
Figure 34 Maximum Auto-Retransfer Attempts Screen
MAX AUTO-REXFER ATTEMPTS
UPPER LIMIT
5
UP :
DOWN :
SELECT :
LOWER INPUT
0
INCREASE
DECREASE
EXIT
VALUE
3
To change the Maximum Auto-Retransfer Attempts parameter, do the following at the SCC:
1. From the System Configuration Screen, press the Up or Down pad to highlight Maximum Auto-
Retransfer Attempts.
2. Press the Select pad. The screen above will appear.
3. Press the Up pad to increase the value or the Down pad to decrease it.
4. Press the Select pad to set the value and to return to the System Configuration screen.
Operation 53
DISCONTINUED
Remote Monitor
The Remote Monitor Panel (optional) displays eight (8) alarms. These alarms are also available for customer use through a set of contacts on a separate terminal board.
When the New Alarm, System Sum mary Alarm, or Module Summary Alarm is activated, you can get more information at the Operator Display Panel or through a remote terminal. Refer to 3.1.14 - Communication Interfaces.
.
SCC and Module Remote Monitor Indications
SCC Remote Monitor Indications Channel Module Remote Monitor Indications
Load On UPS CH1 Output CB Open Load On Bypass CH2 Battery CB Open Battery Discharging CH3 Battery Discharging Low Battery Warning CH4 Low Battery Warning Overload CH5 Control Failure Ambient Over-Temp CH6 Ambient Over-Temp System Summary Alarm CH7 Module Summary Alarm New Alarm CH8 New Alarm
The following alarms, as well as t hose listed above, will activate the System Summary Alarm or the Module Summary Alarm.
Other Alarms That Activate Summary Alarms
Other Alarms That Activate
System Summary Alarm
Control Power Fail Blower Failed Emergency Off Control Power Fail Module Summary Alarm DC Capacitor Fuse Blown Output Over/Under Frequency DC Ground Fault Output Over-Voltage DC Over-Voltage Shutdown Output Under-Voltage Emergency Off Overload Transfer Equipment Over-Temperature Static Switch Unable Inverter Fault
Other Alarms That Activate
Module Summary Alarm
Low Battery Shutdown Overload Overload Shutdown Rectifier Fuse Blown Reverse Power
54 Operation
DISCONTINUED
3.1.6 Alarm Limit Settings Screen
Go to the Master Menu and move the highlighted cursor to LIMIT SETTINGS. Press the Select pad and the Limit Settings screen is displayed.
The Alarm Limit Settings screen has Security Access to enable an authorized Liebert field-service engineer to adjust the UPS system alarm limit settings.
CAUTION All alarm limit settings are application matched and factory set. They should not
be changed casually. Contact Liebert Global Services for changing the alarm limit settings.
Figure 35 Module Alarm Limit Settings Screen
SECURITY ACCESS
UP :
UP :
DOWN :
DOWN :
SELECT :
SELECT :
CURSOR UP
CURSOR UP
CURSOR DOWN
CURSOR DOWN
CHOOSE
CHOOSE
EXIT
Overload Alarm ...............................
DC Over Voltage ...............................
Battery Discharging ...........................
Low Battery .......................................
Battery Shutdown (15 minutes) ......
Upper Point (60 minutes) ......
Battery Rating (100%) .....................
Battery Rating ...................................
ALARM SETTI NGS
104 % 600 VDC 480 VDC 437 VDC 384 VDC 427 VDC 500 KW 15 m in 250 KW 45 min
Overload Alarm (SCC and modules). This alarm setting initiates an alarm message on the display screen warn­ing the operator that the UPS system output current has exceeded the specified limit. This condition only acti­vates an alarm. The UPS does not shut down, but a separate control circuit will transfer the critical load to bypass if the current and time of the overload condition exceeds system capability.
DC Over-Voltage (modules only). This setting limits the maximum permitted level of the DC bus voltage. When this setting is exceeded, an a larm indication appears on the module display screen. The UPS module is taken off-line (the module output circuit breaker is tripped open), and the input and battery circuit breakers trip open.
Battery Discharging (modules only). When the battery voltage on the DC bus falls below this limit for 5 sec­onds, a Battery Discharging alarm message is displayed on the module screen. This means that the battery is dis­charging due to an input voltage sag or interruption, or a module output overload.
Low Battery (modules only). While the battery is discharging, this alarm warns the operator that the Battery Shutdown level is approaching. This is typically set for a reserve time of approximately five minutes (10 volts above the 60-Minute Battery Shutdown Voltage), based on full load operation.
Battery Shutdown (15 Minutes) (modules only). When the battery voltage decreases to this limit for five sec­onds during the first 15 minutes of the discharge, the battery circuit breaker opens to prevent over-discharge. Note that the rated battery reserve time at your site may be other than 15 minutes.
Battery Shutdown (60 Minutes) (modules only). During extended outages or deep sags of more than 15 min­utes, the shutdown voltage limit will ramp up gradually to this 60-minute limit to prevent lengthy discharge and possible battery damage. The battery circuit breaker opens when the battery voltage and the shutdown limit are equal for five seconds. See the Battery Time screen for more information. Also refer to the battery manufac­turer’s manual.
Battery Rating (100%) (modules only). This setting is the full load discharge rating of the battery in kilowatts for the rated backup period. A typical rating might be 500 kW for 15 minutes.
Operation 55
DISCONTINUED
Battery Rating (modules only). This setting is a battery discharge rating in kilowatts under partial load for an extended period, typically 60 minutes. The UPS uses the two battery shutdown voltage settings a nd the two bat­tery discharge ratings in computing rated and calculated time remaining during a discharge event.
NOTE
The Low Battery alarm setting is designed to be useful at full load battery discharge rates. It is typically set for 10 volts above the 60-Minute Battery Shutdown voltage, to provide some measure of warning under all circumstances. If the discharge period extends past 15 minutes (i. e., the load on the UPS is less than full capacity), the Battery Shutdown voltage setting is gradually and automatically increased to protect the batteries from deep discharge. The Low Battery alarm setting is not automatically increased and should not be relied upon as an accurate indicator of battery time remaining. Instead, the operator should consult the Battery Time screen or Present Status screen to see the calculated time remaining based on actual usage during the discharge period.
56 Operation
DISCONTINUED
3.1.7 Load Transfer Procedures Screen
Go to the SCC Master Menu and move the highlighted cursor to LOAD TRANSFER PROCEDURES. Note that this screen is displayed at the System Control Cabinet but is not required at the UPS modules. Press the Select pad and the Load Transfer Procedures screen is displayed.
The Load Transfer Procedures screen contains instructions to transfer the critical load between the UPS system and the bypass line. Comparisons of the UPS and bypass voltage, frequency, and phase synchronization are dis­played along with transfer status messages and an indication of circuit breaker overlap time. The metered param­eter values on the Load Transfer Procedures screen are updated at half-second intervals.
Refer to 3.3.2 - Load Transfer Procedures for more details.
Figure 36 Load Transfer Procedures Screen
HISTORY STATUS MODULE-0 04/10/97 16:49:21 FRAME 36
HISTORY STATUS MODULE-0 01/17/98 11:21:59 FRAME 10 0
SELECT : MASTER MENU
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000
ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000 **** ACTIVE ALARMS **** Output Ov-volts
**** ACTIVE ALARMS **** Ba tt Discharging Low Batt Warn ing
UPS -
OUTPUT VOLTS
OUTPUT VOLTS
BYPASS -
OUTPUT AMPS
OUTPUT AMPS OUTPUT FREQUENCY
OUTPUT FREQUENCY LOAD KVA
OUTPUT VOLTS BYPASS VOLTS
OUTPUT AMPS
OK TO TRANSFER
BATTERY VOLTS OUTPUT VOLTS
TRANSFER PROHIBIT
OUPUT AMPS BATTERY AMPS INPUT VOLTS INPUT AMPS OUPUT VOLTS OUTPUT AMPS LOAD KVA
VOLTAGE COMPARISON
B-CA-B 480 480481
ON UPS
1
C-A
A
A
480480
380
380
479
410
530
3
380 410
380
1. Adjust the UPS voltage until it equals the
380
2. If the OK TO TRANSFER message is highlighted,
410
0
3. Verify that the transfer was successful by checking the
0
380
4. Press the ALARM RESET button to clear alarms which
410
FREQUENCY
DC
DC
C
B
B
C
60.0 Hz
380
380
380
380
4
60.0 Hz
410
410
530
530
MANUAL
380
380
TRANSFER INSTRUCTIONS
410
410
380
380
bypass voltage with the VOLTAGE ADJUST pot.
380 410
simultaneously press the BYPASS and CONTROL ENABLE buttons.
0 0
breaker status on the "MONITOR/MIMIC" screen.
380 410
are no longer active
390 380 410
-583 0 0
380 410
LOAD
349
270
2
SYNCHRONIZATION
0-30
TIME
HERTZ
HERTZ
50.0
50.0
UPS LEAD = 2 Deg
UP :
UP :
DOWN :
DOWN :
SELECT :
SELECT :
TIMELOAD
0:01
NEXT FRAME
NEXT FRAME
PREVIOUS FRAME
PREVIOUS FRAME
EXIT
EXIT
+30
Item 1 - Voltage Comparisons. This chart shows the UPS and bypass voltage and frequency comparisons between each of the three phases. If the UPS and bypass voltages are not within specified tolerances, a manual transfer is not permitted and TRANSFER PROHIBIT is highlighted.
The Voltage Adjust knob (push-to-turn), located on the SCC Operator Control Panel (Figure 10), is used to match the UPS output voltage to the bypass voltage. When the UPS and bypass voltages match within the spe­cific tolerance, a manual transfer is possible and OK TO TRANSFER is highlighted.
CAUTION The UPS output voltage responds very slowly to inputs from the Voltage Adjust
knob. Make small adjustments and wait several seconds each time for voltage to stabilize before continuing.
Item 2 - Synchronization. This display shows the phase synchronization between the UPS output and bypass power. If the phase displacement is outside of the tolerance, a manual transfer is not permitted and TRANSFER PROHIBIT is highlighted.
During normal operation, the synchronization display should read UPS LEAD from zero to 4 degrees.
Item 3 - Status Messages. Three messages are constantly displayed here. Only the active m essage is high­lighted. If TRANSFER PROHIBIT is highlighted, manual transfers/retransfers cannot be performed, and auto­matic retransfers will not be initiated.
Item 4 - Manual Transfer Instructions. These instructions assist the operator in transferring the critical load between the UPS system and the bypass line.
If the load is on the bypass line, step 2 on the screen will instruct you to press the UPS and Control Enable but­tons to retransfer the load from the bypass line to the UPS system.
Operation 57
DISCONTINUED
3.1.8 Start-Up Procedures Screen
From the SCC Master Menu, move the highlighted cursor to START-UP PROCEDURES. Press the Select pad and the SCC Start-Up Procedures screen is displayed.
This screen contains the steps you must follow to start-up the UPS system. The instructions are listed so you can review them prior to performing the start-up.
Figure 37 SCC Start- Up Procedures Screen
SELECT :
MASTER MENU
START-UP PROCEDURES
1. Wait approximately two (2) minutes before attempting any other action .
2. Select "SYSTEM CONFIGURATION" screen to verify that the correct model number is displayed.
3. Go to the m odules(s) and follow the module "STARTUP PROCEDURES".
4. Select "MONITOR/MIMIC" screen, verify that the output voltages are at the proper nominal level and correct number of modul es online is displayed.
5. If the bypass or static switch breakers are open, refer to Start-up Procedures in the UPS manual for instructions on closing thes e breakers.
6. System is now ready to assume load. Sele c t "LOAD TRANSFER PROCEDURES" screen for this procedure.
Prior to this procedure, supply power to the critical load through the bypass line. Start-up each UPS module according to the module start-up procedures. You can then transfer the load from bypass to the UPS system per instructions on the SCC Load Transfer Procedures Screen.
Refer to 3.3.1 - Start-Up Procedure for more details.
NOTE
If the system was shut down in response to an “Emergency Off” signal (typically because of a load fault), there may be alarm messages on the LCD screen that describe system conditions before (or at the time of) the shutdown. Some or all of the alarm conditions may have already been resolved. To clear these alarm messages, make sure the critical load is on bypass power and turn off the control power (see Figure 8 and Figure 9). Wait at least ten minutes for the control power circuitry to completely de-energize. After ten minutes, turn control power back on and follow the start-up procedures on the UPS and SCC screens.
58 Operation
DISCONTINUED
From the module Master Menu, move the highlighted cursor to START-UP PROCEDURES. Press the Select pad a nd the module Start-Up Procedures screen is displayed.
This two-page screen contains the steps you must follow to start-up each UPS system. The instructions are listed so you can review them prior to performing the start-up.
Figure 38 Module Start- Up Procedures Screen
DOWN :
SELECT :
SELECT :
NEXT PAGE
MASTER MENU
START-UP PROCEDURES
1. Verify that the c ontrol power is applied to the system control cabinet (check the display on the system control cabinet).
2. Wait approximately two (2) minutes before attempting any other action .
3. Select "SYSTEM CONFIGURATION" screen to verify that the correct model is displayed.
4. Select "WALK-IN" screen and do the following:
a) Close module input circuit breaker. Verify that the DC voltage bar on
the display begins to gradually move to the right and the AC input current bars do not move to the right more than 10% (40% for modules with input filters ) after the transformer inrush has subsided.
FIRST PAGE
UP :
MASTER MENU
START-UP PROCEDURES (Cont'd)
b) Verify that the output voltage bar m oves to the right after the DC
bus bar has reached the 90% point. Both bars should settle near their respective 100% levels.
c) If anything happens on the di splay not mentioned in (a) or (b),
immediately open the module input ci rcuit breaker and investigate.
5. If step 4 i s successful , select "MONITOR/MIMIC" screen and verify m odule DC bus and output voltages are at proper nominal level. If so, close module battery circuit breaker.
6. If no alarm s are present on the "MONITOR/MIMIC" screen, the module may be placed online by closing the module output breaker.
Prior to this procedure, supply power to the critical load through the bypass line (at the SCC). When you close the UPS module input breaker, power is provided to the UPS rectifier. The module DC bus voltage ramps up to the nominal battery voltage and the UPS inverter turns on when the DC bus reaches the proper voltage. You can then close the battery circuit breaker (MBD) and the UPS module output circuit breaker to place the UPS module on-line.
Refer to 3.3.1 - Start-Up Procedure for more details.
Operation 59
DISCONTINUED
3.1.9 Shutdown Procedures Screen
Go to the SCC Master Menu and move the cursor to SHUTDOWN PROCEDURES. Press the Select pad and the SCC Shutdown Procedures screen is displayed.
This screen contains the steps you must follow to perform a controlled shutdown of the UPS system. The instruc­tions are listed so you can review them before performing the controlled shutdown.
Figure 39 SCC Shutdo wn Procedures Screen
SHUTDOWN PROCEDURES
1. If load is not already being supplied by the bypass line, select the "LOAD TRANSFER PROCEDURE" screen and follow the instructions to transfer the load to bypass.
2. Go to the modules(s) and foll ow the module "SHUTDOWN PROCEDURES."
3. Press the ALARM RESET button to clear alarms which are no longer active.
4. If necessary for maintenance purposes, open the static switch di sconnect circuit breakers.
5. Wait approximately tw o (2) minutes before attempting any other acti on .
To perform the shutdown procedure, transfer the critical load from the UPS system to the bypass line. Shut down each UPS module according to the module Shutdown Procedures.
Refer to 3.3.3 - Shutdown Procedures for more details, including emergency shutdowns.
60 Operation
DISCONTINUED
Go to the module Master Menu and move the cursor to SHUTDOWN PROCEDURES. Pres s the Select pad and the module Shutdown Procedures screen is displayed.
This two-page screen contains the steps you must follow to perform a controlled shutdown of each UPS module. The instructions are listed so you can review them before performing the controlled shutdown.
Figure 40 Module Shutdown Procedures Screen
DOWN :
SELECT :
SELECT :
NEXT PAGE
MASTER MENU
SHUTDOWN PROCEDURES
1. If load can not be supported by the remaining modul es when this m odule is taken off line, go to the system control cabinet and select the "LOAD TRANSFER PROCEDURES" screen. Follow the instructions to transfer to bypass.
2. Open the m odule output breaker by simultaneous ly pressing the OUTPUT TRIP and CONTROL ENABLE pushbuttons.
3. Open the m odule battery breaker by simultaneously pressi ng the BATTERY TRIP and CONTROL ENABLE pushbuttons.
4. Manually open the input breaker by moving the handle to the OFF position.
FIRST PAGE
UP :
MASTER MENU
SHUTDOWN PROCEDURES (Cont'd)
5. Verify breaker status on the "MONITOR / MIMIC" screen.
6. If neces s ary for maintenance purposes, turn the control power switch (fuse disconnect on som e models) to the OFF position.
7. Wait a minimum of two (2) minutes before attempting any other action.
To perform the shutdown procedure, transfer the critical load from the UPS system to the bypass line (at the SCC). Then trip open the UPS module output and battery circuit breaker (MBD), and manually open the UPS module input circuit breaker. The Control Power switch may be turned Off if required for maintenance proce­dures.
Refer to 3.3.3 - Shutdown Procedures for more details, including module shutdowns for service and emergency shutdowns.
Operation 61
DISCONTINUED
3.1.10 Battery Time Screen (Module Only)
At the Master Menu, move the highlighted cursor to BATTERY TIME. Press the Select pad and the Battery Time screen is displayed.
When AC power is not available to the UPS module, the UPS inverter uses DC power from the battery to supply the critical load. This screen helps the operator assess his power resources to determine if and when the critical load shutdown procedures need to be started.
The Battery Time screen is a line graph that tracks the present battery voltage versus the elapsed time that the battery has been discharging (Figure 41). As the battery voltage decreases, the line representing it moves c loser to intersecting the line that represents the battery shutdown voltage. When the battery starts to discharge, the screen displays a 15-minute graph. If the battery has been providing power for more than 15 minutes, the screen displays a 30-minute graph. If battery power is still available after 30 minutes, a 60-minute graph is displayed (Figure 42).
Figure 41 Battery Time Screen Example - 15 Minute Discharge
VDC
500
480
460
440
420
400
380
360
340
Battery Shutdown = 384
Battery Charge = 5%
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Time (Minutes)
SELECT : MASTER MEN U Low Bat tery Warning Calculated Time (Hrs:Min)
Total 00:15 Remain 0:01
Rated Time (Hrs:Min)
Total 00:10 Remain 0:00
NOTE
If the UPS modules connect to independent battery plants, consult all the individual module screens to get the complete picture. If the modules share a common battery, select one module to do the monitoring and disregard the others.
The screen also displays alarm messages (Battery Discharging, Low Battery Warning, and Battery Shutdown) and a set of five parameters that inform the operator of battery condition and time remaining. The five parameters describing battery resources are:
• Rated Total Time, in hours and minutes, is the amount of battery backup time that should be available under
full rated load, based on system design.
• Rated Time Remaining is the Rated Total Time less the duration of the present discharge event.
• Calculated Total Time is an estimate of the total battery backup time available, based on the initial battery
condition and actual performance while powering the connected load during the discharge event.
• Calculated Time Remaining is a real-time estimation of battery time remaining— with the actual connected
load—before battery voltage drops to the Battery Shutdown setpoint.
• Battery Charge is the approximate percentage of total designed ampere hours of battery capacity presently
available based on recharge/discharge activity.
Values for Calculated Total Time and Calculated Time Remaining will appear on the sc reen approximately two minutes after the beginning of the discharge event. Calculated Time Remaining also appears on the Present Sta­tus Report screen. Both Calculated Total Time and Calculated Time Remaining will be updated every six sec­onds, reflecting actual load changes and battery condition. When the Calculated Times become available, they will be displayed in place of the Battery Discharging message on this screen.
62 Operation
DISCONTINUED
Figure 42 Battery Time Screen Example - 45 Minute Discharge
VDC
500
480
460
440
420
400
380
360
340
Battery Shutdown = 417
Battery Charge = 3%
0 10 20 30 40 50 60
Time (Minutes)
SELECT : MASTER MEN U Low Battery Warning Calculated Time (Hrs:Min)
Total 00:45 Remain 0:01
The Battery Time Remaining graph and the Calculated times are extremely helpful to the operator who has the discretionary authority to order load-shedding activities. The Series 600T automatically samples battery voltage and load current and recomputes every six seconds. This gives the operator fast and accurate feedback on efforts to extend battery time remaining by shutting down non-critical loads.
NOTE
While every effort has been made to make the Rated and Calculated Time Remaining values as accurate as practical, these values must be regarded as approximations. At the beginning of the discharge cycle, the Calculated times could be off by as much as ±20% due to such variables as battery initial charge, age of battery, and the subsequent load-shedding activities of the operator. Within a few minutes, however, these calculations should settle into their design accuracy of ±10%, with the end-of­discharge tolerance being +0, -10% of actual observed time. In addition, the operator can adjust the settings affecting Rated Total Time after gaining experience with the actual battery and connected load.
Rated Time (Hrs:Min)
Total 00:25 Remain 0:00
The Series 600T dynamically adjusts the Battery Shutdown voltage based on battery characteristics and the length of the current discharge event. If a discharge event extends past 15 minutes (i.e., the load is less than the full design rating), the Battery Shutdown voltage setting is gradually and automatically increased, to protect the batteries from deep discharge.
When the battery voltage decreases to a preset limit (see 3.1.6 - Alarm Limit Settings Screen), the Low Battery Warning alarm message appears on the display screen. This warns the operator that the battery voltage is approaching the Battery Shutdown level—about five minutes of time remaining at full rated load.
NOTE
The Low Battery alarm setting is designed to be useful at full load battery discharge rates. Unlike the Battery Shutdown voltage, the Low Battery alarm setting is not automatically increased and should not be relied upon as an indicator of battery time remaining. Instead, the operator should consult the Battery Time screen or Present Status screen to see the Calculated Time Remaining based on actual usage during the discharge period.
If the battery discharges to the Battery Shutdown l evel, represented by the lower line on the Battery Time screen, the battery and input circuit breakers trip open and the UPS module is shut down. This protects the battery from being damaged by an extended deep discharge.
Operation 63
DISCONTINUED
Figure 43 Range of Values for Calculated Battery Times
25
20
15
10
5
0
Calc u lat e d T ime Re m ain ing
2.5 5 7.5 10 12.5 15 17.5 20 22.5 25
Elapsed Time (Minutes)
Upper Limit A ctual Lower Limit
CAUTION When battery shutdown occurs, no power will be supplied to the critical load
unless power is available through the bypass line from the utility source (or from an engine generator set). If you anticipate a battery shutdown (and an engine generator set is not available), either transfer the load to bypass (if available) or perform a controlled shutdown of the critical load.
If the Battery Time screen is displayed while the battery is not discharging, it will display the present Battery Charge percentage and the results of the previous discharge event.
NOTE
1. During initial UPS start-up, the Battery Charge will display 100%, even though actual state of charge may be slightly less. It will normally take three to four days of operation to completely charge the battery. After the battery is fully charged the first time, Battery Charge will be an accurate indication of battery status.
2. If Calculated Time Remaining is less than Rated Time Remaining, a battery problem may be indicated. Battery maintenance personnel should thoroughly examine the battery plant for factors that may reduce battery performance, such as:
• Age of battery
• Excessive battery discharge/recharge cycles
• Bad or weak cells
• Low acid levels in flooded cells
• Loose electrical connections
• Ambient temperature extremes
• Dirty battery jar covers.
3. If the battery plant has been thoroughly examined for proper maintenance and condition, and the Calculated value is still less than 80% of Rated value, contact Liebert Global Services.
The Series 600T records information about each discharge event. This data can be reviewed on the Battery Cycle Monitor screen, as described in 3.1.4 - Status Reports Screens.
64 Operation
DISCONTINUED
3.1.11 Meter Calibration Screen
Go to the Master Menu and move the highlighted cursor to METER CALIBRATION. Press the Select pad and the Meter Calibration screen is displayed.
The Meter Calibration screen enables a Liebert field-service engineer to adjust the calibration of the UPS metered functions at e ach cabinet. Access to these settings is limited by the Security Access control.
NOTE
Bypass Volts are calibrated only at the System Control Cabinet (SCC). Input Amps, D.C. Volts, and D.C. Amps are calibrated only at the UPS modules.
CAUTION Meter calibrations are factory set and should not require adjustment. Contact
Liebert Global Services for meter calibration.
WARNING DO NOT ATTEMPT TO CALIBRATE METERS WITHOUT ADEQUATE
TRAINING. METER CALIBRATION REQUIRES SPECIAL TEST EQUIPMENT, ACCESS TO TEST POINTS IN SENSITIVE CIRCUITRY, AND EXPOSURE TO HAZARDOUS VOLTAGE.
Figure 44 Meter Calibration Screen
SECURIT Y ACCESS
METER CALIBRATION
UP :
DOWN :
SELECT :
CURSOR UP
CURSOR DOWN
CHOOSE
INPUT VOLTS
INPUT VOLTS
INPUT VOLTS
INPUT AMPS
INPUT AMPS
INPUT AMPS
PHASE A-B
PHASE B-C
PHASE C-A
PHASE A
PHASE B
PHASE C
D.C. VOLTS
D.C. AMPS
OUTPUT VOLTS
OUTPUT VOLTS
OUTPUT VOLTS
OUTPUT AMPS
OUTPUT AMPS
OUTPUT AMPS
PHASE A-B
PHASE B-C
PHASE C-A
PHASE A
PHASE B
PHASE C
Operation 65
DISCONTINUED
3.1.12 Battery Equalize Screen
Go to the Master Menu and move the highlighted cursor to BATTERY EQUALIZE. Press the Select pad and the Battery Equalize screen is displayed.
The Battery Equalize screen enables the operator to adjust the battery equalize time. It is also used to choose between auto and manual battery equalize recharging modes. Note that AUTO MODE can be selected only from the System Control Cabinet (SCC). Selections made at the SCC override previous selections made at the UPS modules.
When the input utility power is interrupted, the battery supplies DC power to the UPS module inverters so there is no interruption of power to the critical load. When the AC input power is restored, the battery equalize recharging circuit c an be activated automatically or manually to increase the module rectifier/charger output voltage to recharge the battery. The battery equalize circuit may also be manually activated at any time during normal float (constant) voltage operation. The equalizing time can be adjusted from 0 to 72 hours.
Figure 45 Battery Equalize Screen
SECURIT Y ACCESS
EXIT
EQUALIZE TIME PERIOD (hrs.) ...........
STOP EQUALIZE CHARGE ...................
MANUAL MODE .....................................
AUTO MODE ..........................................
MANUAL / RESET TO AUTO MODE ......
BATTERY EQUALI ZE RECHARGI NG
0 NO NO YES NO
UP :
DOWN :
SELECT :
CURSOR UP
CURSOR DOWN
CHOOSE
CAUTION Do not use the Battery Equalize mode if you have valve-regulated, sealed-cell
(maintenance-free) batteries. Refer to your battery manufacturer’s manual.
EQUALIZE TIME PERIOD. This selection permits the operator to adjust the battery equalize time in one hour
increments from 0 to 72. The battery equalize time must be greater than zero for the battery to begin recharging in both the AUTO and the MANUAL modes. This period is set by use of the Up/Down pads and Select pad.
When the battery is at full voltage (not being recharged), this selection reads EQUALIZE TIME PERIOD (hrs). When the battery is recharging, this selection reads EQUALIZE TIME REMAINING (hrs). After the equalize recharge time has expired, the indication returns to the preset equalize time.
STOP EQUALIZE CHARGE. This selection lets the operator halt the equalizing charge to the battery at any time, whether the circuit was activated automatically or manually.
MANUAL MODE. This mode enables the operator to manually initiate a battery equalize charge to raise the DC bus voltage to correct a non-uniformity in the individual c ell voltages or specific gravity readings.
AUTO MODE (SCC only). When the battery recharge control logic is in the AUTO MODE, the UPS module battery chargers attempt the equalization process only if the EQUALIZE TIME PERIOD is greater than zero, the battery voltage has been at or below the Battery Discharging alarm limit for longer than 30 seconds, and the battery breakers (MBD) are closed.
66 Operation
DISCONTINUED
3.1.13 Alarm and Status Messages
Module Status Messages
The module status messages indicate how many UPS modules are included in the system and the present status of each module.
The following status messages may appear in the module status area.
1. MOD N. A module status message line is displayed for each UPS module in the system. Up to six (6)
modules may be included in a multi-module system. The N in the message will indicate a specific UPS module number, 1 through 6.
2. ON LINE. The UPS module output circuit breaker is closed and power from the module is available to the
SCC. The module output is sharing the critical load if the UPS Output Breaker is closed.
3. OFF-LINE. The UPS module output circuit breaker is open. More specific alarm messages are displayed at
the UPS module.
4. SUM ALM. The Module Summary Alarm has been activated by one of the alarm messages listed in two
—SCC and Module Remote Monitor Indications and Other Alarms That Activate Summary
tables
Alarms
module.
5. COM FAIL. The UPS module is not communicating with the SCC. This could mean loss of power to the
UPS module controls, a disconnected cable, or a control logic failure (detected by watchdog timer. Call Liebert Global Services if you require assistance. To resume communication after control power is restored, sequence display to Master Menu.
Figure 46 SCC Status and Alarm Message Areas
—in 3.1.5 - System Configuration Screens. The specific alarm message is displayed at the UPS
BYPASS INPUT A-B B-C C-A 0V 0V 0V
0 Hz
UPS INPUT PWR
A-B B-C C-A
0V 0V 0V
MOD 1 ON LINE SU M ALM MOD 2 ON LINE SU M ALM MOD 3 ON LINE SU M ALM
MODULE S TATUS
MESSAGES
UPS RATINGS
SCCT 1600
OUTPUT VOLTAGE
A-B B-C C-A
480V 480V 480V
Not OK to Transfer Static Switch Connected
SYSTEM STATUS
MESSAGES
60.0 Hz
LOAD BLOCK
MESSAGES
LOAD
627 KVA / 502 KW
A BC
755A 755A 755A
3 OF 3 MODULES
CONNECTED
REDUNDANT Time To Overload Transfer: XXXX SEC
Byp Not Avail Static Sw Unable Module Sum Alm
ALARM
MESSAGES
Operation 67
DISCONTINUED
System Status Messages
The system status messages indicate whether the static bypass switch is connected or disconnected, through the manually operated Static Switch Disconnects (see Figure 9). The status messages also advise the operator when a transfer or retransfer between the UPS system and bypass line is permitted, based on matching voltage, fre­quency, and phase.
The following status messages may appear in the system status area.
1. Static Switch Connected. The static switch is connected (the disconnect switches are closed—ON) and is
ready provide a current path from the bypass input to the load.
2. Static Switch Disconnected. The static switch is disconnected (the disconnect switches are open—OFF) for
maintenance procedures.
3. OK to Transfer. The UPS system voltage, frequency, and phase match the bypass line. This means that a
transfer between the bypass line and the UPS system is permitted.
4. Not OK to Transfer. Either the UPS or bypass voltage, frequency, or phase is not within the specified
limits or the static bypass switch is not available. Therefore, manually initiated transfer between the bypass line and the UPS system is not permitted. Emergency or overload transfer to bypass may still be available provided the “static switch unable” alarm is not indicating.
Load Block Messages
Status messages in the Load block indicate how many modules are in the system, how many modules are ON LINE, and whether the system is operating in the redundant mode.
The following status messages may appear in the load block.
1. N OF X MODULES CONNECTED. The number N is the number of UPS modules ON LINE. This means
the module output circuit breaker is closed. X is the number of UPS modules in the system (connected to this SCC). This number is set from the System Configuration screen.
2. REDUNDANT. The capacity of the UPS modules ON LINE is sufficient to supply the critical load even if
one module is taken OFF LINE. The critical load will remain on the UPS system if one module goes OFF LINE.
3. NON-REDUNDANT. The critical load will be transferred to bypass if one module goes OFF LINE, and
you must transfer the load to bypass in order to perform maintenance on any UPS module.
4. TIME TO OVERLOAD TRANSFER. During an overload condition, the time remaining before transfer
(in seconds) is displayed at the bottom of the load block. At each Module (MMU), the message is Time to Overload Shutdown.
68 Operation
DISCONTINUED
Alarm Messages
The alarm message area displays the alarm conditions that are present within the UPS system. Alarm messages are displayed in flashing reverse video. During normal operation no alarm messages should be present. Up to four messages are displayed. To see if any additional alarm conditions are present in the UPS system, display the Present Status screen on the control panel.
Table 1 is a complete list of all alarm messages and corrective actions, if any.
The first column lists the alarm message, with related alarms grouped together.
The third column indicates which special functions (if any) are initiated by the alarm.
D - the alarm initiates an auto-dial call through a user-provided modem to a remote terminal. E - message displayed only on Status Report screens including Event History. F - the alarm freezes the History Status Report memory buffer in the cabinet where the alarm is displayed.
Pressing the Alarm Reset pad for 15 seconds will unfreeze the memory buffer. L - the alarm latches the displayed alarm message. Some alarm conditions are temporary (transient) and
may not last long enough to be noticed. Latching the display (keeping i t on) lets you know that an alarm con­dition has occurred. A latching display alarm remains on the display screen until the alarm condition is removed and the Alarm Reset pad is pressed.
R - the alarm is displayed on an (optional) Remote Monitor Panel. This information is also available for customer use through a set of contacts on a separate terminal board.
S - the alarm initiates a summary alarm at the Remote Monitor Panel and at the SCC.
The fourth column provides an explanation of the alarm condition, the critical bus status, and the corrective actions, if any, to remedy the alarm.
Abbreviations Used in Alarm Messages
Auto Automatic
Avail Available
Batt Battery
Byp Bypass
Cap Fuse Capacitor Fuse
Cont Power Control Power
Equip Equipment
H/W Hardware
Inv Fuse Inverter Fuse
OF/UF Over/Under Frequency
Ov-temp Over-Temperature
O-volt Over-Voltage
O-volts Over-Voltage
Ph Seq Phase Sequence
Rect Fuse Rectifier Fuse
Rexfer Retransfer
Shutdn Shutdown
Static Sw Static Switch
Un-volts Under-Voltage
Xfer Transfer
Operation 69
DISCONTINUED
Table 1 Alarm Messages - Meaning and Corrective Action
Alarm
Message AC INPUT Input Fail MMU — The rectifier input line voltage is outside of specified limits or the
DC BUS DC Ground Fault MMU L, S Either the positive (+) or negative (-) DC bus is grounded. No transfer
DC Capacitor Fuse Blown
Battery CB Open MMU R, S The module battery circuit breaker (MBD) is open. This circuit
Battery Discharging
Low Battery Warning
Low Battery Shutdown
DC Over-Voltage Shutdown
BYPASS Load On Bypass SCC D, E, F The critical load is being supplied power from the bypass line, and is
Table 1 Abbreviations
D = auto-dial; L = latches E = reports only; R = remote F = freezes; S = summary D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs D# = auto-dial initiated through Module N (1-6) off-line
Cabinet
Location
Special
Functions
Corrective Action in Brackets [ ]
Meaning and
input c ircuit breaker is opened while the battery circuit breaker remains closed. The battery supplies power to the critical load through the UPS inverter.
or shutdown occurs. [Contact Liebert Global Services at once. Do not attempt to locate or
repair the fault.]
MMU D, F, S At least one DC capacitor fuse has opened. The UPS module is
taken off-line and the input and battery circuit breakers trip open. [Contact Liebert Global Services at once. Do not attempt to reset the
circuit breakers.]
breaker can be opened either manually or automatically in a UPS shutdown procedure. If the UPS is operating with this breaker open,
the critical load is not protected from loss of the utility source power.
[After AC power is restored and the DC bus is at 100% operating voltage, manually close the battery circuit breaker so the rectifier can charge the battery.]
MMU R, S The battery is discharging. This occurs whenever the battery
supplies power to the load for more than 5 seconds because of input power failure, a rectifier problem, or an overload condition. If the input power or a source of auxiliary power is restored to the UPS module, the UPS automatically returns to normal operation.
[Watch the battery voltage carefully. Reduce the load (begin controlled shutdown) to extend the battery back-up time. Reset the UPS alarms after the input power is restored. The message clears after 30 seconds.]
MMU R, S The battery voltage is approaching the minimum discharge voltage
(approximately 5 minutes remaining). [Complete the controlled shutdown of the critical load. Reset the
alarms i f the input power is restored before shutdown.]
MMU D, F, L, S The battery voltage has decreased to the minimum discharge value.
The UPS module is taken off-line (no power to the critical load) and the battery and input circuit breakers trip open.
[Perform a UPS system start-up procedure when AC power becomes available.]
MMU D, F, L, S The maximum preset value of the DC Bus voltage has been
exceeded. The UPS module is taken off-line and the input and battery circuit breakers trip open.
[Contact Liebert Global Services at once. A fault may have occurred within the UPS. Do not attempt to reset the circuit breaker.]
therefore exposed to utility power disturbances. [Clear all of the alarms before attempting to retransfer the load from
the bypass line to the UPS.]
70 Operation
DISCONTINUED
Table 1 Alarm Messages - Meaning and Corrective Action (continued)
Alarm
Message
BYPASS (Contʼd.)
Auto Transfer to Bypass
Auto Retransfer Primed
Manual Reset/ Retransfer
Static Switch Unable
Bypass Not Available
Bypass Phase Sequence Wrong
UPS SYSTEM Input Current
Unbalanced
Control Power Fail
Output Over/ Under Frequency
Output Under­Voltage
Output Over­Voltage
Table 1 Abbreviations
D = auto-dial; L = latches
E = reports only; R = remote
F = freezes; S = summary
D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs
D# = auto-dial initiated through Module N (1-6) off-line
Cabinet
Location
Special
Functions
Corrective Action in Brackets [ ]
SCC D, E, F The critical load has been automatically transferred to the bypass
line. [Use the History Status screen to determine the cause for the
transfer. Clear all of the alarms before attempting to retransfer the load from bypass to UPS.]
SCC — An automatic retransfer will be initiated when the OK to Transfer
condition has been present for 10 seconds, if the overload has dropped below 100% of the rated SCC current and if enough UPS modules are on-line.
SCC — A manual retransfer is required. Either a system overload condition
has lasted more than 5 minutes, or no more auto-retransfer attempts are available. Note that this alarm is only used if auto-retransfer attempts are enabled.
[Perform a manual retransfer if all necessary conditions are present.]
SCC S The UPS output is not synchronized to the bypass power source.
The static bypass switch is disconnected, or it has failed internally. [Emergency and overload transfer to the bypass source is not
available. Manually set the Static Switch Disconnects to ON (closed) if the static switch is disconnected. If the alarm conditions are automatically corrected, reset the alarm to clear it. Contact Liebert Global Services if the alarm stays on.]
SCC — The bypass power source voltage is not within specifications.
[Check the bypass power source.]
SCC — The power conductors on the bypass line are not wired to the UPS in
the required sequence. This alarm should appear only during initial start-up or after a repair to the source power system.
[Disconnect power from the bypass line and correct the wiring. A Liebert Global Services representative must be present during initial start-up of your UPS System.]
MMU E At least one input phase differs from the average current by 10% or
more for four (4) hours. Contact Liebert Gl obal Services. If the condition persists, transfer the load to the bypass line.
SCC
MMU
L, S
L, R, S
The logic control power supply from the UPS output is not operating properly. The UPS module continues operating but will shut down if the input power fails. The SCC continues operating but will shut down if the bypass power fails. Contact Liebert Global Services immediately.
SCC L, S Output frequency differs from the nominal (60 Hz) by more than 0.5
Hz. No transfer or shutdown occurs. [Contact Liebert Global Services at once.]
SCC D, F, L, S The UPS system output voltage is under the minimum (-12%)
deviation from nominal. The load automatically transfers to the bypass line.
[If the alarm condition is no longer present, reset the alarm and retransfer the load from bypass to UPS. Contact Liebert Global Services if alarm persists.]
SCC D, F, L, S The UPS system output voltage is above the maximum (+10%)
deviation from nominal. The load automatically transfers to the bypass line. All UPS modules are taken off-line and are shut down.
[Contact Liebert Global Services at once. Do not attempt to reset circuit breakers.]
Meaning and
Operation 71
DISCONTINUED
Table 1 Alarm Messages - Meaning and Corrective Action (continued)
Alarm
Message
UPS SYSTEM (Contʼd.)
Overload SCC
Overload Transfer SCC D, F, L, S The load on the UPS has exceeded the current versus time window
Module Summary Alarm
Module N Off Line SCC D
Inverter Nonsynchronized
Overload Shutdown
Reverse Power MMU D, F, L, S Excessive reverse power flow from the critical bus into the UPS
Inverter Fault MMU D, F, S At least one of the fuses has opened or an inverter fault was
Communication Failure
Battery Cycle Buffer Wa rning
Table 1 Abbreviations
D = auto-dial; L = latches E = reports only; R = remote F = freezes; S = summary D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs D# = auto-dial initiated through Module N (1-6) off-line
Cabinet
Location
MMU
Special
Functions
R, S
S
Corrective Action in Brackets [ ]
Meaning and
The UPS output current exceeds the rated system load current. This condition causes an alarm only, the UPS does not shut down.
[Determine cause of the overload. Reduce the load until the overload condition is corrected. Reset the UPS alarm.]
of system overload capacity. The UPS system transfers the load to bypass.
[Reduce the load. If the system does not initiate an automatic load retransfer, manually retransfer the critical load from the bypass line to the UPS. Reset the alarm.]
SCC S
R (MMU)
An alarm message (see lists in SCC and Module Remote Monitor
Indications and Other Alarms That Activate Summary Alarms in
3.1.5 - System Configuration Screens) or the watchdog timer has
activated the Module Summary Alarm. [Clear alarm conditions, if possible.] The output circuit breaker of Module N is open. The number N will
R (MMU)
identify the module (1 through 6). [Review active alarms at Module N and clear alarm conditions, if
possible.]
MMU — Inverter output is not synchronized with the UPS system critical bus.
This also means the output circuit breaker is open and should not be closed until the output is in sync. This condition may correct itself. If not, shut down the UPS module and then perform a start-up procedure.
[Contact Liebert Global Services if condition persists.]
MMU D, F, L, S The UPS output current has exceeded 175% of the rated full load or
the overload capacity has been exceeded. The UPS module is taken off-line and shut down.
[Contact Liebert Global Services at once. Do not attempt to reset circuit breakers.]
inverter has occurred, probably because of low inverter output voltage or a phase mismatch. The UPS module is taken off-line and is shut down.
[Contact Liebert Global Services immediately. Do not attempt to reset circuit breakers.]
detected. The UPS module is taken off-line and is shut down. [Contact Liebert Global Services immediately. Do not attempt to
reset the circuit breakers.]
SCC S The COM FAIL status message is as important as an alarm
message. Refer to 3.1.13 - Alarm and Status Messages.
— D, E The optional Battery Cycle Monitor can retain information about the
last 132 battery discharge events. When the storage buffer approaches its capacity, this warning message is broadcast via terminal and modem communication channels, and a complete listing of all records is sent to the terminal port. The message clears after 30 seconds.
72 Operation
DISCONTINUED
Table 1 Alarm Messages - Meaning and Corrective Action (continued)
Alarm
Message
UPS SYSTEM (Contʼd.)
Hardware Shutdown
Emergency Off SCC
COOLING Ambient Over-
Temperature
Blower Failed MMU S A fault in one or more of the blower motors has occurred. This
Equipment Over­Temperature
Over-Temperature Timeout
REMOTE MONITOR PANELS (Refer also to SCC and Module Remote Monitor Indications and Other Alarms That Activate Summary Alarms in
3.1.5 - System Configuration Screens) Load On UPS — R (SCC) The UPS is operating properly. No corrective action is necessary. New Alarm — R (SCC)
System Sum mary Alarm
Module Summary Alarm
Table 1 Abbreviations
D = auto-dial; L = latches
E = reports only; R = remote
F = freezes; S = summary
D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs
D# = auto-dial initiated through Module N (1-6) off-line
Cabinet
Location
Special
Functions
Corrective Action in Brackets [ ]
Meaning and
MMU D# At least one of t he following alarm conditions is present: Inverter
Fault, Rectifier Fuse Blown, Reverse Power, Overload Shutdown, logic power supply failure, or inverter output symmetry failure. The UPS module is taken off-line and is shut down.
[Contact Liebert Global Services at once. Do not attempt to reset the circuit breakers.]
D*, L, S The Emergency Module Off (or Emergency Power Off) switch has
MMU
been pressed, which caused the UPS system to shut down and transfer the load to the bypass line (or all power to the critical load has been shutdown).
[Determine the cause of the emergency condition and correct it if possible. Contact Liebert Global Services if you require assistance.]
MMU R, S The intake air to the UPS module exceeds the specified maximum
temperature. [This c ondition only causes an alarm, but should be corrected
immediately to prevent damage to equipment due to overheating.]
condition only causes an alarm, but if not promptly corrected it could cause an equipment over-temperature condition that would shut down the UPS module.
[Check the blowers for proper operation. Contact Liebert Global Services if you require assistance.]
MMU S Sensors on power semiconductor heatsinks detect temperatures
above the steady state limits for these components. The control logic sets off the alarm but does not shut down the UPS module if the condition lasts less than 10 minutes.
[Check the air intake, air exhaust, and filters. Reduce the load or transfer it to bypass. Contact Liebert Global Services if the alarm persists.]
MMU D, F An Equipment Over-Temperature condition has persisted for more
than 10 minutes. The UPS module is taken off-line and is shut down. [Check the air intake, air exhaust, and filters before attempting to
start-up the UPS.]
Another new alarm message has been registered on the UPS
R (MMU)
system. [Clear the new alarm condition, if possible.]
— R (SCC) One or more of the UPS system alarm messages has been activated
or a control logic failure has been detected by a watchdog timer. [Use the Present Status screen to determine which alarms are
active. Clear the new alarm condition if possible to do so.]
— R (MMU) One or more of the UPS module alarm messages has been
activated. [Use the Present Status screen to determine which alarms are
active. Clear the new alarm condition, if possible to do so.]
Operation 73
DISCONTINUED
Table 2 Alarm Messages - Summary
Alarm Message MMU SCC Special Functions
Input Fail X — —
DC Ground Fault X — L, S
DC Capacitor Fuse Blown X — D, F, S
Battery CB Open X, R — S
Battery Discharging X, R R S
Low Battery Warning X, R R S
Low Battery Shutdown X — D, F, L, S
DC Over-Voltage Shutdown X — D, F, L, S
Load On Bypass — X, R —
Auto Transfer to Bypass — E D, F
Auto Retransfer Primed — X —
Manual Reset/Retransfer — X —
Static Switch Unable — X S
Bypass Not Available — X —
Bypass Phase Sequence Wrong — X —
Input Current Unbalanced E — —
Control Power Fail X, R X L, S
Output Over/Under Frequency — X L, S
Output Under-Voltage — X D, F, L, S
Output Over-Voltage — X D, F, L, S
Overload X X, R S
Overload Transfer — X D, F, L, S
Inverter Non-Synchronized X — —
Module N (1-6) Off Line R X D
Overload Shutdown X — D, F, L, S
Reverse Power X — D, F, L, S
Rectifier Fuse Blown X — D, F, S
Inverter Fault X — D, F, S
Hardware Shutdown X — D#
Emergency Off X X D*, F, S
Ambient Over-Temperature X, R R S
Blower Failed X — S
Equipment Over-Temperature X — S
Over-Temperature Timeout X — D, F
Load On UPS — R —
New Alarm R R —
Module Summary Alarm R X S
System Summary Alarm — R —
D = Auto-Dial initiated D* = Auto-Dial initiated through Auto Transfer to Bypass if load is on UPS D# = Auto-Dial initiated through Module N (1-6) off-line E = message displayed on Status Report screens
F = freezes the History Status Report memory buffer L = latches the d i splayed alarm message R = Remote Alarm Contact (optional on MMU) S = Summary Alarm (System or Module) initiated X = messag e displayed on Monitor/Mimic screen and audible alarm
74 Operation
DISCONTINUED
3.1.14 Communication Interfaces
Your Liebert Series 600T UPS includes the following communication ports:
• Worldwide reporting to a remote terminal through a modem
• Reporting to a local terminal (no modem required)
• Reporting to a local monitor only
• Site reporting to Liebert SiteScan Central Monitoring System
• Reporting via SNMP interface to a building management or network management system
• Selected alarm messages to a Liebert Remote Monitor Panel and to contact closures for customer use
All external communication devices, including the m odem, are optional equipment. Connections to communica­tion ports are made by wiring cables to terminal boards at the SCC. Connection points are shown on the Control Wiring Interconnect Diagram. Contact Liebert Global Services for assistance when attaching an external device to your UPS system.
Any terminal that accepts the standard 7-bit ASCII codes and conforms to the data link requirements can be used to interface with the Series 600T UPS. If a printer is used, the terminal must support it. The UPS does not send or receive any printer control commands.
Data link requirements are:
• Asynchronous RS-232 communication
• Terminals may be configured as DTE or DCE
• Baud Rate:
Modem: 1200 or 2400 Terminal: 2400 only
• Data Bits: 7
• Stop Bits: 1
• Parity: Odd
• Handshaking: Not required
• Full Duplex
Worldwide Reporting
This port transmits UPS system status and history information to a remote terminal in RS-232 format through a PC-compatible modem.
Auto-Dial
The Series 600T UPS communication program will automatically dial a pre-programmed (customer selected) phone number when specified alarm conditions occur. The auto-dial phone number, an alternate number, and the modem baud rate are programmed by using the SCC System Configuration screen. The alarm messages that ini­tiate an auto-dial call are identified in Table 1 .
When the auto-dial function is initiated, automatic dial attempts to the first phone number are made at periodic intervals for 30 minutes. If unanswered, the system rolls over to the second number and repeats calling until con­nection is made or returns to first phone number after 30 minutes.
Once a connection is made to a terminal, the system transmits the information on the Present Status Report screen, then hangs up. The Present Status Report includes the UPS system identification number, date, time, alarm messages and metered parameter indications.
Requesting Information
If your Series 600T is equipped with a modem and telephone line, you can call the UPS and receive system status and historical information on discharge events. You can place the call from either a remote terminal or a personal computer with a communications program.
Follow the instructions for your terminal or your communications program to call the UPS. When you make con­nection, the UPS will send you the greeting: “Hello, you are connected to a Series 600.” At this point, the UPS will respond to your specific requests for information, according to Ta b l e 3.
For example, to see a copy of information on the Present Status Report screen from the SCC (see Present Status in this manual), press the A key (either upper or lower case can be used for all except the date and time com-
Operation 75
DISCONTINUED
mands) and then the Enter key. The Series 600T will send the data, which will be displayed on your screen. To see the Present Status Report screen from, say, Module 1, type A1 and press the Enter key. Please note that the data on the screen is like a snapshot—the status of the UPS at the moment you requested the information. The information sent remotely is not updated, although you can repeat the process at intervals to request the present information.
Some screens, like the Battery Cycle Monitor information, contain data that you may wish to import into a spreadsheet for further calculations. To put this data into a usable format, use the screen-capture feature of your communications software (or a separate screen-capture program) to save all or part of the data to disk. Hint: If you save the file with an extension of “.txt,” it can then be imported into a spreadsheet program and converted to worksheet format.
To terminate your connection to the Series 600T, press the H key and then the Enter key. The UPS will hang up its modem and await your next call.
Local Reporting to a Terminal
This port sends UPS system status and history information to a local terminal in RS-232 format. No modem is required. The Present Status Report screen is sent to the local terminal whenever a new a larm occurs. Commands for requesting information, and for changing the date and time, are in Ta b le 2.
Local Reporting to a Monitor
A monitor connected to this port will display the same alarm information being sent to the local terminal. This monitor does not display information going out through the modem port.
Site Reporting: SiteScan or SNMP
The SiteScan port sends UPS system information to a Liebert SiteScan Central Monitoring System. UPS ope ra­tion, environmental control systems, and facility security can all be monitored from a single location. This infor­mation can also be sent via SNMP interface to a local network or building management system.
If your site has SNMP communications, the optional Liebert SiteNet Integrator allows you to monitor the status of all the dry-contact outputs of the Series 600T. The Integrator module monitors up to ten digital inputs and two temperature/humidity sensors, and can control two external devices with contact closure outputs. It can be pro­grammed to activate local audible and visual alarms in addition to network “traps.”
Remote Monitor Panel
The Liebert Remote Monitor Panel provides an LED indication of the following conditions:
Load On UPS Load On Bypass
Battery Discharge Low Battery Warning Overload Ambient Overtemp
System Summary Alarm New Alarm
This information is also available for customer use through a set of contacts on a separate terminal board.
Alarm messages that activate t he System Summary Alarm are listed in two tables
Monitor Indications and Other Alarms That Activate Summary Alarms Screens.
The Remote Monitor Panel housing is a NEMA Type 1 enclosure, available for either surface-mount or flush­mount installations.
—SCC and Module Remote
—in 3.1.5 - System Configuration
76 Operation
DISCONTINUED
Separate / Simultaneous Outputs
The RS-232 interface can support a modem plus either a local terminal or a local monitor. Likewise, the SiteScan port can support either SiteScan or SNMP communications. Whatever interfaces you use will all operate simulta­neously.
Table 3 Series 600T Terminal Commands
Key(s) Function
A, return AN (N=1 to 6), return
^B (control-B), return ^BN (N=1 to 6) return
C, return ^CN (N=1 to 6), return
F (no return) Freezes data output. This stops the data scrolling on the monitor to allow closer
G, return Resets (unfreezes and clears) the History Status Report memory buffer. This erases
Q (no return) The data output stops (quits). The UPS communication system remains on stand-
d mm/dd/yy, return This entry sets the date (month/day/year) in the UPS system clock. You must
t hh:mm:ss, return This entry sets the time (hour:minute:second) in the UPS system clock. You must
Displays Present Status Report screen. NOTE: For all three report screens, a number 1 through six in place of N will access an individual UPS module. If no number is entered, you will get a report from the SCC.
Displays Event History Report screen, starting with the most recent frame and then scrolling back through earlier frames.
Displays History Status Report screen starting with the most recent frame and then scrolling back through the earlier frames.
study or a printout. This is a toggle switch command. Press the F key again to resume data scrolling.
the alarm messages and meter indications that were stored immediately before and after a significant system fault. NOTE: Do not reset the History Status Report memory buffer until operation and maintenance personnel have reviewed it as a troubleshooting tool.
by, ready to receive the next communication command. NOTE: To return to the beginning of the Event History or History Status Report, press Q, then request your desired report again.
include the slash (/) as you key in the date. Note that the d command must be lower case.
include the colon (:) as you key in the time. Note that the t command must be lower case.
H, Return Prompts the UPS system to hang up its modem (only applicable to the modem
communications port).
I, Return Display Battery Cycle Monitor information for 0-30 second discharge events.
J, Return Display Battery Cycle Monitor information for 31-90 second discharge events.
K, Return Display Battery Cycle Monitor information for 91-240 second discharge events.
L, Return Display Battery Cycle Monitor information for over 240 second discharge events.
M, Return Display Status Summary screen of battery discharge events.
N, Return Show detail information on all battery discharge events in order of occurrence
backspace Moves cursor left to cancel previous entry or command.
(Last-In, First-Out).
Operation 77
DISCONTINUED
3.2 Modes of Operation
This section illustrates the flow of power through circuit breakers, switches, and UPS components during various modes of operation. An SCCB with three modules is shown. The same modes of operation apply to all configu­rations of the Liebert Series 600T UPS multi-module system. Highlighted (thick) lines in the diagrams indicate power flow and power availability.
These illustrations show a three-breaker maintenance bypass because it is most commonly used. Your installa­tion may have a two-breaker, three-breaker, or four-breaker maintenance bypass, or none at all.
These illustrations do not show an alternate power source (generator) and automatic transfer switch (external to the UPS) that might be present at your installation.
The following circuit breaker abbreviations are used:
BFB Bypass Feeder Breaker
BIB Bypass Input Breaker
CB1 Module Input Breaker
CB2 Module Output Breaker
MBB Maintenance Bypass Breaker
MBD Module Battery Disconnect
MIB Maintenance Isolation Breaker
RIB Rectifier Input Breaker
SBB System Bypass Breaker
3.2.1 Load On Bypass
Load on Bypass, with the UPS not available, is shown in Figure 47. The UPS system could be in this mode of operation during either initial start-up or UPS system shutdown and isolation for maintenance.
Figure 47 Load on Bypass (UPS Not Available)
RIB RIB
#2UPS
CB1
R
I
CB2
MBD
Battery
Battery
#3UPS
CB1
R
I
CB2
MBD
Battery
CB1
CB2
RIB BFB
#1UPS
SBS
R
I
SBB
System
Controls
Output
SCCT
MBD
(can accommodate up to 6 UPS modules)
BIB
MBB
SKRU
MIB
To Critical Load
SCCT
78 Operation
DISCONTINUED
3.2.2 OK To Transfer
The OK to Transfer status message will be displayed when the bypass line and UPS system output power are both available, their voltage, frequency, and phase synchronization are matched within specifications, and the Static Switch Disconnects are closed (ON). An alarm message may be displayed to indicate Load On Bypass. If no alarm is displayed, the operating status is Load On UPS.
When the OK to Transfer message is displayed, you can perform a manual transfer of the load from the UPS sys­tem to bypass, or a manual retransfer of the load from bypass to the UPS system.
Use the Load Transfer Procedures screen at the SCC when performing a manual transfer. Refer to 3.3.2 - Load Tra nsfer Procedures.
The UPS system control logic at the SCC will initiate an automatic transfer to bypass if an overload condition exceeds the system current versus time window, or if a UPS module is taken off line while the system is operat­ing in the non-redundant mode. An automatic retransfer to the UPS system may be initiated when recovering from system overloads lasting less than five minutes. Refer to 3.4 - Automatic Operations.
NOTE
When the critical load is being supplied power from the bypass line, it is exposed to utility power disturbances.
Figure 48 Load on Bypass (UPS Available)
Battery
CB1
CB2
RIB RIB
#3UPS
R
I
MBD
Battery
CB1
CB2
MBD
RIB BFB
#2UPS
R
I
CB1
CB2
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
Battery
MBD
SCCT
(can accommodate up to 6 UPS modules)
Operation 79
DISCONTINUED
Figure 49 Load on UPS (Bypass Available)
Battery
CB1
CB2
RIB RIB
#3UPS
R
I
MBD
Battery
CB1
CB2
MBD
RIB BFB
#2UPS
R
I
CB1
CB2
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
Battery
MBD
SCCT
(can accommodate up to 6 UPS modules)
80 Operation
DISCONTINUED
3.2.3 Momentary Overloads
An overload in the critical load will continue to be supplied by the UPS system if the overload condition does not exceed the current versus time curve of overload capacity for either the SCC rating or for the number of modules on-line.
For momentary overloads exceeding 155% of rated system (SCC) current, the static switch turns on for 40 milli­seconds to provide current from the bypass line in parallel with current from the UPS system output. Up to 1000% of rated current can be supplied for less than one cycle, while up to 500% of rated load can be sustained for the full 40 milliseconds of pulsed-parallel operation. By providing two power sources simultaneously, high current can be supplied to the critical load with full output voltage regulation. The critical load can be supported through inrush currents and momentary faults without operating the motorized circuit breakers.
If an overload situation exceeds 40 milliseconds, the UPS system continues to supply power to the critical load if it remains within the current versus time curve of overload capacity. If the system overload capacity is exceeded, the UPS control logic at the SCC initiates an automatic transfer to the bypass line by operating the static bypass switch and the motorized system circuit breakers (SBB and UPS Output).
Refer to 3.4 - Automatic Operations.
Figure 50 Momentary Overl oad (Pulsed Static Bypass Switch)
Battery
CB1
CB2
RIB RIB
#3UPS
R
I
MBD
Battery
CB1
CB2
MBD
RIB BFB
#2UPS
R
I
CB1
CB2
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
Battery
MBD
SCCT
(can accommodate up to 6 UPS modules)
Operation 81
DISCONTINUED
3.2.4 Input Power Failure (Load On Battery)
If the utility AC power source fails, or is outside the acceptable range, the battery plant becomes the power source for the UPS module inverters. The UPS system continues to supply power to the critical load, and also to the controls of the UPS modules and the SCC.
You can use the Battery Time screen at the UPS modules to monitor the present battery voltage compared to the shutdown value. The length of time t he battery can sustain the load depends on the size of the load and the size and condition of the battery plant. The battery plant is usually large enough to supply a 100% rated load for 15 minutes.
Alarm messages that indicate battery status are Battery Discharge, Low Battery, and Battery Shutdown. The voltage limits for these alarms are displayed on the UPS module Alarm Limit Settings screen. These limits were selected for your installation by Liebert Global Services during initial start-up.
The battery block in the UPS module Monitor/Mimic Display indicates Charge or Discharge and the current in Amperes. Maximum battery discharge current ranges from 324 amps (for 150 kVA) to 1620 amps (for 750 kVA). Refer to the separate Installation Manual or drawings for specific data on your system.
Figure 51 Input Power Fail (Load on Battery)
RIB RIB
#3UPS
CB1
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R RR
I
CB2
MBD
Battery
CB1
RIB BFB
#1UPS
SBS
SBB
II
System
Controls
Output
SCCT
MBD
(can accommodate up to 6 UPS modules)
BIB
MBB
SKRU
MIB
To Critical Load
SCCT
82 Operation
DISCONTINUED
3.2.5 One Module Off -Line
A multi-module UPS system can be supplied with a back-up (redundant) UPS module, which is the typical con­figuration. A redundant system includes one more module than the number required to supply the critical load. A redundant system operates in the redundant mode if all modules are ON LINE. Note that the UPS system can also operate in the redundant mode with one module OFF LINE if the critical load is reduced so that not all ON LINE modules are required. The UPS modules share the load, and the critical load will remain on the UPS sys­tem if any one of the modules is disconnected (goes OFF LINE) for maintenance or because of an internal fault.
The system control logic monitors the connected critical load and the number of UPS modules ON LINE. If the UPS system is operating in the redundant mode, the REDUNDANT status message will be displayed at the Sys­tem Control Cabinet (SCC). If the UPS system is operating in the non-redundant mode (redundant module is OFF LINE or was not included in the system configuration), the NON-REDUNDANT status message is dis­played at the SCC. In the Non-Redundant mode, the critical load will be transferred to bypass if any UPS module goes O FF LINE, and you must transfer the load to bypass in order to perform maintenance on any UPS module.
Figure 52 One Module Off-Line (Load on UPS)
RIB RIB
RIB RIB
RIB BFB
RIB BFB
Battery
CB1
CB2
MBD
#3UPS
R
I
#2UPS
CB1
R
I
CB2
CB1
CB2
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
Battery
MBD
Battery
MBD
SCCT
(can accommodate up to 6 UPS modules)
Operation 83
DISCONTINUED
3.2.6 Off Battery
The battery plant can be disconnected from the UPS modules, if required for battery maintenance, by opening the module battery disconnect (MBD) circuit breaker(s). In this situation the UPS system will continue to supply conditioned power to the critical load, but if input power fails, the UPS system cannot supply power to the load.
CAUTION When the UPS system is operating with the module battery disconnect (MBD)
circuit breaker(s) open, the critical load is not protected from loss of the utility source power.
Figure 53 Load on UPS (Battery Not Available)
Battery
CB1
CB2
RIB RIB
#3UPS
R
I
MBD
Battery
CB1
CB2
MBD
RIB BFB
#2UPS
R
I
CB1
CB2
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
Battery
MBD
SCCT
(can accommodate up to 6 UPS modules)
84 Operation
DISCONTINUED
3.2.7 Emergency Modules Off
The Local Emergency Modules Off (LEMO) mode is used to remove power from all UPS system components, and the critical load will continue to be supplied through the bypass line.
The Emergency Module Off control is a guarded pad on the SCC Control Panel (see Figure 10).
Lift the cover and press the pad. The load will be transferred to bypass, and the battery (MBD), input, and output circuit breakers will be opened (tripped). This will remove power from all UPS system components except the controls, system bypass circuit breaker, and the static switch.
Refer to 3.3.3 - Shutdown Procedures.
Figure 54 Emergency Modules Off
RIB RIB
RIB RIB
RIB BFB
RIB BFB
#3UPS
CB1
R
I
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R
I
CB2
MBD
Battery
CB1
MBD
#1UPS#3UPS
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
SCCT
(can accommodate up to 6 UPS modules)
Operation 85
DISCONTINUED
3.2.8 Emergency Power Off
The Remote Emergency Power Off (REPO) mode is used to remove all power from the critical load.
The Remote E mergency Power Off control is a switch located remotely from the UPS system. It will normally be in the same room as the critical load equipment. This mode can also be initiated by an automatic contact closure in the same external circuit as the manually operated switch.
When you operate the Emergency Power Off switch, all UPS circuit breakers are opened including the bypass circuit breaker. All power through the UPS is removed from the load. Typically, the REPO circuit also opens the circuit breakers that provide power to the bypass lines and the UPS controls.
Refer to 3.3.3 - Shutdown Procedures.
Figure 55 Emergency Power Off
RIB RIB
RIB RIB
RIB BFB
RIB BFB
#3UPS
CB1
R
I
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R
I
CB2
MBD
Battery
CB1
MBD
#1UPS#3UPS
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MBB
SKRU
MIB
SCCT
To Critical Load
SCCT
(can accommodate up to 6 UPS modules)
86 Operation
DISCONTINUED
3.2.9 System Shutdown
Perform a System Shutdown procedure when you must disconnect the UPS system components from all power sources when required for maintenance procedures.
Use the Shutdown Procedures screen when performing a manual System Shutdown.
Refer to 3.3.3 - Shutdown Procedures.
Refer to 3.2.10 - Maintenance Bypass.
Before performing any maintenance on your Liebert Series 600T UPS System, observe ALL of the WARN-
INGS in 4.0 - Maintenance.
WARNING LETHAL VOLTAGES ARE PRESENT WITHIN THIS SYSTEM EVEN
WHEN IT IS NOT ON OR WHEN POWER IS NOT BEING SUPPLIED. OBSERVE ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY QUALIFIED TO DO SO!! NEVER WORK ALONE.
Figure 56 System Shutdown
RIB RIB
#3UPS
CB1
R
I
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R
I
CB2
MBD
Battery
CB1
MBD
RIB
#1UPS
SBS
R
I
SBB
System
Controls
Output
MIB
BIB
SKRU
BFB
BFB
MBB
SCCT
To Critical Load
SCCT
(can accommodate up to 6 UPS modules)
Operation 87
DISCONTINUED
3.2.10 Maintenance Bypass
Maintenance Bypass switchgear (cabinet, panelboard, switchboard or custom switchgear) allows you to totally isolate the UPS system from a ll power sources, while you m aintain power to the critical load.
Your installation may have a two-breaker, three-breaker, or four-breaker Maintenance Bypass, or none at all. The main differences are the locations of the Rectifier Input Breaker and the Bypass Input Breaker (BIB).
Another option that may be present at your site is an alternate power source (generator) and an automatic transfer switch (ATS).
Note that to totally isolate the UPS system from all power sources, the Main Input switchgear and battery circuit breakers must also be opened.
CAUTION Instructions for operating the Maintenance Bypass circuit breakers are on the
Maintenance Bypass cabinet. Make sure you understand the proper sequence before operating any circuit breaker. Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load.
Figure 57 Load on Maintenance Bypass (Two Breakers)
RIB RIB
#3UPS
CB1
R
I
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R
I
CB2
MBD
Battery
CB1
MBD
RIB
#1UPS
SBS
R
I
SBB
System
Controls
Output
BIB
MIB
SKRU
BFB
BFB
MBB
SCCT
To Critical Load
SCCT
(can accommodate up to 6 UPS modules)
88 Operation
DISCONTINUED
Figure 58 Load on Maintenance Bypass (Three Breakers)
STANDBY GENERATOR
AUTOMATIC
TRANSFER SWITCH
RIB RIB
#3UPS
CB1
R
I
CB2 CB2
MBD
Battery
Battery
#2UPS
CB1
R
I
CB2
MBD
Battery
CB1
MBD
RIB
#1UPS
SBS
R
I
System
Controls
Outpu t
SBB
SCCT
SCCT
(can accommodate up to 6 UPS modules)
BFB
BFB
BIB
SKRU
MIB
To Cr i tical Load
MBB
Operation 89
DISCONTINUED
3.3 Manual Procedures
The Liebert Series 600T UPS system is designed to function while unattended by an operator. The system con­trol logic at the System Control Cabinet (SCC) monitors the performance of the UPS system, the availability of power sources, and the current required by the critical load.
The system control logic at the SCC:
1. Determines what overload conditions can be sustained without a transfer to bypass.
2. Initiates an automatic transfer to bypass to sustain an overload.
3. Can initiate an automatic retransfer to the UPS after a system overload has been cleared.
4. Initiates an automatic transfer to bypass and emergency module shutdown when a specified UPS fault occurs.
The control logic at each UPS module:
1. Determines what overload conditions can be sustained by the module while it is on-line.
2. Automatically takes the UPS module off line and initiates an emergency module shutdown when selected UPS faults occur.
Refer to 3.4 - Automatic Operations for more details.
Manual procedures available to the operator include Start-Up, Load Transfers, and Shutdowns. These procedures are performed by using the operator control panel and some manually operated circuit breakers and switches.
The LCD display at each UPS cabinet includes a screen to help you with each manual procedure by listing each step you must perform.
This section lists step-by-step controls to operate and conditions to observe in the following manual procedures:
1. Start-Up: including initial start-up, recovering from input power failure, recovering from battery shutdown, and recovering from shutdowns for emergencies or maintenance procedures
2. Load Transfers: including transfers from UPS system to bypass, and retransfers from bypass to the UPS system.
3. Shutdowns: including module shutdowns for maintenance procedures and emergency shutdowns.
90 Operation
DISCONTINUED
3.3.1 Start-Up Procedure
SCC Start-Up
When the UPS system has been shut down, for any reason, use this procedure to start-up the UPS system to pro­vide filtered, reliable
power to the critical load. This procedure gives step-by-step instructions for controls to operate and conditions to observe. Your present situation could be initial start-up or recovering from input power failure, battery shut­down, maintenance shutdown, or an emergency shutdown.
NOTE
The following procedure assumes that the UPS installation inspection and initial start-up have been performed by Liebert Customer Service. A Liebert authorized representative must perform the initial system start-up to ensure proper system operation.
CAUTION The following procedure provides power to the critical load distribution system.
Verify that the critical load distribution is ready to accept power. Make sure that personnel and equipme nt are ready for the critical load distribution sy stem to be energized.
If your installation includes a Maintenance Bypass, you may already be supplying power to the critical load equipment through the Maintenance Bypass. If there is no power to the critical load, apply power through the UPS bypass line per the following procedure.
During a start-up procedure, power is supplied to the critical load through the UPS (internal) bypass line while the UPS system is being energized. Depending on the reason for your UPS system shutdown, you may already have power through the bypass line. You can determine this by observing the Monitor/Mimic Display screen at the System Control Cabinet (SCC) after Control Power is available.
Step 1. Before you apply power to the UPS modules, determine the position of the following circuit breakers and switches:
a. Bypass Input Breaker (BIB) - If this circuit breaker is closed, you may already have power to the
critical load through the bypass line. If this breaker is closed, leave it closed. If it is open, leave it open until you are ready to energize the bypass line.
b. System Bypass Circuit Breaker (SBB) - This motorized circuit breaker (Figure 9) should be closed
unless you are recovering from a Remote Emergency Power Off. You may already be supplying power to the critical load through this breaker. If this breaker is open, you will be instructed to reset it later in this procedure.
c. UPS Output Circuit Breaker - This motorized circuit breaker (see Figure 9) should be open. d. Static Switch Disconnects - These manually operated switches (see Figure 9) will be in the ON
(closed) position unless you are recovering from a shutdown. If these switches are OFF (open), you will be instructed to reset them and turn them on later in this procedure.
NOTE
Depending on SCC model, the static switch disconnects can be two circuit breakers, contactors, or plug-in connections on a drawout carriage assembly. The location could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC cabinet selected for your UPS system.
Operation 91
DISCONTINUED
NOTE
If the system was shut down in response to an “Emergency Off, there may be alarm messages on the LCD screen that describe system conditions before (or at the time of) the shutdown. Some or all of the alarm conditions may have already been resolved. To clear these alarm messages, turn off the control power (see Figure 8 and Figure 9). Wait at least ten minutes for the control power circuitry to completely de­energize. After ten minutes, turn control power back on and wait two minutes before continuing.
CAUTION If you are recovering from a UPS system shutdown for maintenance procedures,
verify that all of the SCC doors are closed and latched. All test equipment must be removed from the system. All electrical conn ections must be secure.
Power must be provided to the UPS controls so the operator can use the LCD display and so the system logic can perform its control functions. Note that you can use the LCD display to monitor UPS system status, even when the UPS modules are not operating.
During a start-up procedure, power is supplied to the critical load through the UPS (internal) bypass line while the UPS modules are being energized. Depending on the reason for your UPS system shutdown, you may already have power through the bypass line. You can determine this by observing the Monitor/Mimic Display screen at the System Control Cabinet (SCC).
Step 2. If the bypass line is not supplying the load, the LCD screen will be blank. Energize the bypass line by operating the following controls:
a. Close the Bypass Input Breaker (BIB). This breaker may be in your Maintenance Bypass cabinet.
NOTE
Wait two minutes after applying bypass power before you operate any other UPS controls.
CAUTION DO NOT assume that the UPS System Bypass Breaker (SBB) is closed.
Instructions for operating the Maintenance Bypass circuit breakers are on the Maintenance Bypass cabinet.
Make sure you understand the proper sequence before operating any circuit breaker. Operating a Maintenance Bypass circuit breaker out of sequence could cut off power to the critical load.
b. Observe the Monitor/Mimic Display screen to determine if your System Bypass circuit breaker (SBB)
is closed and whether the UPS Bypass line is supplying power to the critical load. If your System Bypass circuit breaker is open (as in recovering from an Emergency Power Off or L ow
Battery Shutdown), close this circuit breaker as follows: b1. Open the SCC control panel door and find the Transfer Relay Board (Figure 11). If the red LED
(CR18) labeled TOT S/D (Total Shutdown) is on, press the Bypass Reset switch (SW1 ) on this board. The red LED should turn off.
b2. Set the Static Switch Disconnects (Figure 9) OFF (open).
NOTE
Depending on SCC model, the static switch disconnects can be two circuit breakers, contactors or plug-in connections on a drawout carriage assembly. The location could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC cabinet selected for your UPS system.
92 Operation
DISCONTINUED
b3. Find the Close Bypass switch (SW1) on the System Interface Board (Figure 11). Press this switch
to reset the System Bypass circuit breaker. Check the Monitor/Mimic screen to verify the breaker is closed.
b4. Press two Reset Switches for Static Switch Disconnects behind door below SCC control panel
(see Figure 9).
b5. Set the Static Switch Disconnects to ON (closed ).
c. If the UPS Bypass line is available, but not ye t supplying power to the load, close the circuit breakers
(external to the UPS) required to provide power to the critical load equipment. Follow the three steps shown below.
CAUTION Be sure to operate Maintenance Bypass circuit breakers in the proper sequence.
c1. Verify the Bypass Input Breaker (BIB) and System Bypass circuit breakers are closed.
c2. Close the Maintenance Isolation Breaker (MIB). c3. Open the Maintenance Bypass Breaker (MBB).
Observe the Monitor/Mimic Display screen to confirm that the UPS Bypass line is e nergized and supplying power to the critical load equipment.
At the System Control Cabinet (SCC), press the Select pad to put the Master Menu on the LCD display. Move the highlighted curs or to Start-Up Procedures (use the Up and Down pads). Press the Select pad to display the Start-Up Procedures screen. Return to this screen whenever you need to see the start-up instructions.
On the LCD display, select System Configurati on from the Master Menu. Verify that all of the information con­tained in the System Configuration screen is correct. When the data is correct, press the Select pad until the dis­play returns to the Master Menu.
Perform a module start-up procedure at each module in your UPS system until all required modules are on-line. Then return to the SCC to complete your UPS system start-up.
Use the Monitor/Mimic Display screen at the SCC to determine t he condition of the UPS system. Press the Alarm Reset pad to clear the Alarm Messages. Refer to Ta b l e 1 for an explanation of any remaining alarm mes­sages (except Load On Bypass). Call Liebert Global Services if you cannot clear the remaining alarm messages.
If the only alarm message displayed is Load On Bypass, the UPS system is now ready to provide filtered, unin­terruptible power to the critical load equipment. Refer to 3.3.2 - Load Transfer Procedures to retransfer the load from the bypass line to the UPS system.
Figure 59 SCC Start-Up Procedures Screen
MASTER MENUSELECT :
1. Wait approximately two (2) minutes before attempting any other action .
2. Select "SYSTEM CONFIGURATION" screen to verify that the correct model number is displayed.
3. Go to the m odules(s) and follow the module "STARTUP PROCEDURES".
4. Select "MONITOR/MIMIC" s c reen, verify that the output voltages are at the proper nominal level and correct number of modules online is di splayed.
5. If the bypass or static switch breakers are open, refer to Start-up Procedures in the UPS manual for ins tructions on closi ng these breakers.
6. System is now ready to ass ume load. Select "LOAD TRANSFER PROCEDURES" screen for this procedure.
START-UP PROCEDURES
Operation 93
DISCONTINUED
UPS Module Start-Up
When a UPS module has been shut down for any reason, use this procedure to start-up the UPS module to pro­vide filtered, reliable power to the critical bus. This procedure gives step-by-step instructions for controls to operate and conditions to observe. Your present situation could be initial start-up or recovering from input power failure, battery shutdown, maintenance shutdown, or an emergency shutdown.
Perform this module start-up procedure at each module in your UPS system until all required modules are on­line.
Step 1. Before you apply power to the UPS module, determine the position of the following circuit breakers and switches:
a. Rectifier Input Breaker (RIB) - If this external circuit breaker is closed, you already have power to the
UPS cabinet and possibly power to the controls. If this breaker is closed, leave it closed. If it is open, leave it open until you are ready to apply power to the UPS cabinet.
b. Input Circuit Breaker (CB1) - Verify that this breaker on the front of the UPS module cabinet
(Figure 8) is in the OFF position. c. Mo dule Battery Disconnect (MBD) - Verify that this external breaker is open or tripped. d. Module Output Circuit Breaker (CB2) - Verify that this breaker on the front of the UPS module
cabinet (Figure 8) is in the OFF position. e. Control Power - This manually operated switch (Figure 8) will be in the ON position unless you are
recovering from a maintenance shutdown. If this switch is OFF, leave it OFF until you are ready to
apply power to the UPS controls.
CAUTION
If you are recovering from a module shutdown for maintenance procedures,
verify that all of the UPS system doors are closed and latched, AU test
equipment must be removed from the system. AU electrical connections must be
secure.
Power must be provided to the UPS module controls so you can use the LCD display and so the system logic can perform its control functions. Note that you can use the LCD display to monitor UPS status, even when the UPS module is not on-line. If the LCD display is operating, you already have Control Power. This will be the usual condition, unless you are recovering from a maintenance shutdown.
Step 2. If the LCD screen is not operating, energize Control Power by operating the following two controls:
a. Close the Rectifier Input Breaker (RIB), which is outside the UPS cabinet. This will provide power to
the UPS cabinet but not to any UPS components. b. Open the UPS cabinet door and close the Control Disconnect fuseholders to turn the Control Power ON.
See Figure 8. Close the UPS cabinet door.
NOTE
Wait two minutes after applying Control Power before you operate any other UPS
module controls.
Press the Select pad on the UPS module to put the Master Menu on the LCD display. Move the highlighted cur­sor to Start-Up Procedures (use the Up and Down pads). Press the Select pad to display the Start-Up Procedures screen. Return to this screen whenever you need to see the start-up instructions.
On the LCD display, select System Configurati on from the Master Menu. Verify that all of the information con­tained in the System Configuration screen is correct. When the data is correct, press the Select pad until the dis­play returns to the Master Menu.
94 Operation
DISCONTINUED
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