Liebert Emerson NX UPS System User Manual
Liebert NX UPS
User Manual–10-30kVA, 400V, 50/60Hz
AC Power
For Business-Critical Continuity
TABLE OF CONTENTS
1.0 SINGLE MODULE UPS INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 Location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.1 UPS Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.2 External Battery Room . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1 System Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.2 10 to 30kVA UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.3 Moving the Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.4 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.5 Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.6 Final Positioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.7 Floor Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.4.8 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5 External Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.1 Rectifier and Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.5.2 External Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.5.3 UPS Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.6 Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.6.1 Cable Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.7 Control Cables and Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.7.1 Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
1.8 Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.1 Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.2 Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1.8.3 External Circuit-Breaker Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
1.8.4 Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
1.8.5 Emergency Power Off Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.8.6 External Bypass Switch Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
1.8.7 Battery Start Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.0 BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.3 Battery Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.2 Temperature Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.4 Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.5 Circuit Isolator Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.3.6 Battery Temperature Sensor (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.7 Moving the Battery Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.8 Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3.9 General Arrangement Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
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2.4 Battery Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.4.1 Connection Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.4.2 Fitting the Batteries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.4.3 Connecting the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.4.4 Battery Room Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.5 Battery Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.0 UPS MULTI-MODULE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.2 Paralleled UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.2.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.2.4 Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3 Hot-Standby UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.3.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.4 Dual Bus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.4.1 Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.4.2 External Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.4.3 Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
3.4.4 Control Wires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3.4.5 Extended Dual Bus Synchronization Option (DBS Interface Box) . . . . . . . . . . . . . . . . . . . . . 32
4.0 INSTALLATION DRAWINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1.1 Split-Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
5.1.2 Static Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.1.3 Battery Temperature Compensation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
5.1.4 Redundant Control Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.1.5 Socket Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.2 Multi Module UPS—1+N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5.2.1 Features of NX Multi-Module UPS Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.2.2 Requirements for Paralleling of UPS Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3 Modes of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3.1 Normal Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3.2 Battery Mode (Stored Energy Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3.3 Auto-Restart Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5.3.4 Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.5 Maintenance Mode (Manual Bypass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.6 ECO Mode (Single UPS Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.7 Parallel Redundancy Mode (System Expansion) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.8 Hot-Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.3.9 Frequency Converter Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
5.4 Battery Management—Set During Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.4.1 Normal Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
5.4.2 Advanced Functions (Software Settings Performed by the Commissioning Engineer) . . . . . 44
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5.5 Battery Protection (settings by commissioning engineer) . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6.0 OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.1.1 Power Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6.2 UPS Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.2.1 Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6.2.2 Verify Switching Between Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.3 Switching the UPS from Normal to Maintenance Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.4 Powering Down the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.5 Powering Down the UPS and Maintaining Power to Load . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.6 Emergency Shutdown With EPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.7 Auto Restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.8 Reset After Shutdown for Emergency Stop (EPO Action) or Other Conditions . . . . . . . . . . 50
6.9 Language Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.10 Changing the Current Date and Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.11 Command Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.12 Isolating One Module in a Multi-Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.13 Inserting One Module into a Multi-Module System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.0 OPERATOR CONTROL PANEL AND DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
7.1.1 Mimic Power Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1.2 Audible Alarm (Buzzer) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.1.3 Direct Access Push Buttons (Keys) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.1.4 LCD Monitor and Menu keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.1.5 Detailed Description of Menu Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
7.2 All Status and Event Messages Displayed on the UPS Front Panel. . . . . . . . . . . . . . . . . . . 60
7.3 Prompt (Pop-Up) Windows. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.4 Dynamic Energy Flow Chart and UPS Help Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
7.5 Default Screen Saver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.0 OPTIONS—FOR ASSEMBLY INSIDE THE UPS CABINET . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1 Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1.1 Battery Ground Fault Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
8.1.2 Redundant Fan for Power Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.1.3 OC Web Card - SNMP/HTTP Network Interface Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
8.1.4 Relay Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.1.5 Multiport-4 Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
8.2 OC485 Web Card – Modbus, Jbus, IGM Net . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.2.1 Remote Alarm Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
8.2.2 Dust Filter for 10-30kVA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
9.0 TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
9.1 Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
iii
FIGURES
Figure i Model number nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Figure 1 Residual current circuit breakers (RCCB) symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2 Auxiliary terminal block detail monitoring board (U2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 3 Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4 Jumper connection for BCB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5 Output dry contacts and EPO wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6 Battery start for UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 7 Single temperature sensor and monitor board-U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 8 Battery cabinet bottom cable entry location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9 Battery cabinet with fuse or optional circuit breaker locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10 Battery cabinet internal layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 11 Battery cabinet, bottom entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 12 Battery room design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 13 Emergency power off connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 14 Typical 1+N system block diagram with common input supply, with separate batteries
and optional output / bypass distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 15 Dry contacts, multiple UPS modules with distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16 Connection of 1+N system parallel control cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 17 Hot standby configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18 Typical dual bus system configuration with static transfer switch and Load Bus Synch . . . . . . 31
Figure 19 Connections of a typical dual bus system utilising Load Bus Synch . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 20 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 21 General arrangement—10-30kVA UPS module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 22 10-30kVA NX front view with doors open . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 23 Location of parallel logic board M3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 24 Internal battery layout and connecting—GP12120 F2 (12AH/12V) . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 25 Internal battery layout and connecting—LC-R127R2PG1 (7.2AH/12V) . . . . . . . . . . . . . . . . . . . . 37
Figure 26 Internal battery layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 27 Single unit block diagram with split-bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 28 Multiple battery temperature sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 29 1+N multi-module UPS with external maintenance bypass switch . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 30 Example of configuration for single UPS with external maintenance bypass cabinet. . . . . . . . . 49
Figure 31 UPS control and display panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Figure 32 Graphic LCD monitor windows and keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Figure 33 Menu tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Figure 34 Help screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Figure 35 Default screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Figure 36 Battery ground fault detection set connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Figure 37 Redundant power module fan set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 38 Communication bays and cable location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Figure 39 OC Web Card data summary window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 40 OC Web Card battery data summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 41 SiteNet MultiPort4 Intellislot pin configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 42 OC485 Web card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 43 Dust filter replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
iv
TABLES
Table 1 Maximum steady state AC and DC currents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 2 Distance from floor to connection point on the equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 3 Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 4 Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 5 External circuit-breaker interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 6 Output dry contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7 EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 8 Dimensions and weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 9 UPS operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 10 Rotary switch configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 11 UPS control and display panel components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 12 Rectifier indicator—1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 13 Battery indicator—2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 14 Bypass indicator—3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 15 Inverter indicator—4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 16 Load indicator—5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 17 Status (Alarm) indicator—6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 18 Audible alarm key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 19 Menu key Icons and their meaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 20 UPS system window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 21 Descriptions of UPS menus and data window items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 22 UPS messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 23 Prompt windows, meanings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 24 Dry contact fault alarm signal is available for remote monitoring . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 25 Relay Card pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 26 Relay card jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 27 SiteNet MultiPort4 Intellislot pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 28 NX communication options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 29 Compliance with European, international standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 30 Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 31 Overall efficiency, heat losses and air exchange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 32 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 33 Rectifier AC input (mains) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 34 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 35 Inverter output to critical load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 36 Bypass mains input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . 76
v
Figure i Model number nomenclature
NXe U
NX Product Line
Liebert NXe UPS module ratings:
10, 15, 20, 30kVA (with internal battery)
Example:
0A0 010
Feature Set for Region
A0 - EMEA
Revision
to Base
Unit
UPS Single Module
NXE0A0010U =
B0 - Aust/NZ
C0 - Japan
D0 - China
E0 - Latin Amer
F0 - Other
Output kVA
010
015
020
Input &
Output
Vol tag e
Voltage Code
220/380 F
230/400 U
240/415 G
10kVA module for Europe and Middle East, 400V/230V
output
Options Model
Battery cabinet NXE0NBCS
Battery Ground Fault detection kit NXA0UFXBGF
Battery temperature probe (for external battery) NXA0UFXBTS
Maintenance bypass cabinet (separate bypass input) NXE0NMBX Specify total system kVA
Fan Redundancy kit NXE0UFXRF
Seismic Anchor kit NXA0UFXSAN
Dual bus control cable 05-10-15 metres NXA0UFXD
Parallel control cable kit 05-10-15 metres NXA0UFXP
Relay Card (On Bat, Bat Low, On Byp, Sum, UPS Fail)
MultiPort4 (4 sets On Bat, bat Low)
Web browser/TCPIP/SNMP Card
Jbus/Modbus Card
RAM - Remote Alarm Monitor NXA0CFXRAM Requires RELAYCARD-INT
Modem card NXA0CFXMOD
Extended LBS box NXA0UFXLBS
Air Filter NXA0UFXARF One filter
Dual Bus Extension Kit 50-150 Meters NXXXXMLBSKIT
Individual Battery Monitoring
Identification Note
Specify UPS kVA rating
Specify length in metres
RELAYCARD-INT
MULTIPORT 4
OCWEB-LB
OC485CARD
BDS 40 or
BDS 256
These are Intellislot plug-in cards (3 slots
available).
(XXX: 050 or 150) - Specify length in
meters. Used for extension in length or
dual bus arrangement between Nx and
non-Nx sources'
Specify number of blocks. Consult
Emerson Network Power representatives
for complete configuration
50/60Hz
vi
SAFETY PRECAUTIONS
This manual contains information concerning the installation and operation of this Emerson Network
Power Liebert NX
This manual should be read before commencing installation.
The UPS must be commissioned and serviced by an engineer approved by the manufacturer (or
agent).
Failure to do so could result in personnel safety risk, equipment malfunction and invalidation of warranty.
The Liebert NX has been designed for Commercial/Industrial use only, and is not recommended for
use in life support applications.
This is a low emission CLASS A Uninterruptible Power System (UPS) product. In a residential environment, this product may nevertheless cause radio interference, in which case, the user may be
required to take additional measures.
™
Uninterruptible Power System (UPS).
Conformity and Standards
This equipment complies with CE directives 73/23 & 93/68 (LV Safety) and 89/336 (EMC), with Australia and New Zealand EMC Framework (C-Tick) and with the following product standards for Uninterruptible Power System (UPS).
• EN / IEC / AS 62040-1-1—General and safety requirements for use in operator access area
• EN / IEC / AS 62040-2—EMC requirements; Class A compliant
• EN / IEC / AS 62040-3—Performance requirements and test methods
For more details, see 9.0 - Technical Specifications
Continued compliance requires installation in accordance with these instructions and the use of manufacturer approved accessories only.
WARNING
!
High Leakage Current
EARTH CONNECTION IS ESSENTIAL BEFORE CONNECTING THE INPUT SUPPLY.
Earth leakage current exceeds 3.5 mA and is less than 860 mA.
Transient and steady-state earth leakage currents, which may occur when starting the
equipment, should be taken into account when selecting instantaneous RCCB or RCD devices.
Residual Current Circuit Breakers (RCCBs) must be selected sensitive to DC unidirectional
pulses (class A) and insensitive to transient current pulses.
Note also that the earth leakage currents of the load will be carried by this RCCB or RCD.
This equipment must be earthed in accordance with the local electrical code of practice.
WARNING
!
Back-Feed Protection Notice
This UPS is fitted with a voltage-free contact closure signal for use with an external
automatic disconnect device (supplied by others) to protect against back-feeding voltage into
the bypass input. If this signal is not used by the installer, a label must be added at the
external bypass input disconnect device to warn service personnel that the circuit is
connected to a UPS.
The text to use is the following or equivalent:
ISOLATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS
CIRCUIT.
1
User-Serviceable Parts
All equipment maintenance and servicing procedures involving internal access requires the use of a
tool and should be carried out only by trained personnel. There are no user-serviceable parts behind
covers requiring a tool for removal.
This UPS is fully compliant with safety regulations for equipment located in an operator accessible
area. Hazardous voltage is present within the UPS and battery enclosure but out of reach of non-service personnel. Contact with hazardous voltage is minimized by housing live parts behind safety panels that require a tool for their removal. No risk exists to any personnel when operating the
equipment in the normal manner, following the recommended operating procedures.
Battery Voltage Exceeds 400VDC
All physical battery maintenance and servicing requires the use of a tool or a key and should be carried out only by trained personnel.
WARNING
!
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is potentially
lethal.
Battery manufacturers supply details of the necessary precautions to be observed when working on,
or in the vicinity of, a large bank of battery cells. These precautions should be followed implicitly at all
times.
Attention should be paid to the recommendations concerning local environmental conditions and the
provision of protective clothing, first aid and fire-fighting facilities.
2
Single Module UPS Installation
1.0 SINGLE MODULE UPS INSTALLATION
1.1 Introduction
This following section describes the requirements that must be taken into account when planning the
positioning and cabling of the Liebert NX uninterruptible power supply and related equipment.
This chapter is a guide as to general procedures and practices that should be observed by the installing engineer. The particular conditions of each site will determine the applicability of such procedures.
WARNING
!
Professional Installation Required
Do not apply electrical power to the UPS equipment before being authorised to do so by the
commissioning engineer.
The UPS equipment shall be installed by a qualified electrical tradesperson in accordance
with the information contained in this manual. All equipment not referred to this manual is
shipped with details of its own mechanical and electrical installation.
NOTE
Three-phase, 4-wire input supply required.
The standard Liebert NX UPS is suitable for connection to 3-phase, 4-wire (+ Earth) TN, TT
and IT AC power distribution systems (IEC60364-3). Optional 3-wire to 4-wire conversion
transformers are available. If it is used in IT AC power distribution systems, a 4-pole circuit
breaker must be used on the input and refer to the relative IT Systems’ standard
WARNING
!
Battery Hazards
Special care should be taken when working with the batteries associated with this equipment.
When connected together, the battery terminal voltage will exceed 400VDC and is hazardous.
Eye protection should be worn to prevent injury from accidental electrical arcs.
Remove rings, watches and all other metal objects.
Use only tools with insulated handles.
Wear rubber gloves.
If a battery leaks electrolyte or is otherwise physically damaged, it must be replaced, stored in
a container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with the skin, the affected area should be washed
immediately with water.
1.2 Preliminary Checks
Before installing the UPS, please carry out the following preliminary checks:
1. Visually examine the UPS and battery equipment for transit damage, both internally and
externally. Report any damage to the shipper immediately.
2. Verify that the correct equipment is being installed. The equipment supplied has an identification
tag on the back of the main door reporting: the type, size and main calibration parameters of the
UPS.
3
Single Module UPS Installation
1.3 Location
1.3.1 UPS Room
The UPS and its internal battery is intended for indoor installation and should be located in an environment with clean air and with adequate ventilation to keep the ambient temperature within the
specified operating range (see Table 30).
All models in the Liebert NX UPS range are air-cooled with the aid of internal fans. Cold air enters
through ventilation grilles at the front of the cabinet and hot air is released through the grilles at the
back. Do not cover the ventilation openings.
If necessary to avoid room temperature build-up, install a system of room extractor fans. Optional air
filters are available if the UPS is to operate in a dusty environment.
The UPS heat dissipation detailed in Table 31 can be used as a guide for air conditioning sizing,
depending on the selected mode of operation:
• Normal Mode (VFI SS 111 Double Conversion UPS)
• ECO Mode (VFD SS 311 Stand By UPS)
If in doubt use Normal Mode figures.
NOTE
The UPS is suitable for mounting on concrete or other non-combustible surface only.
1.3.2 External Battery Room
Batteries should be mounted in an environment where the temperature is consistent and even over
the whole battery. Temperature is a major factor in determining the battery life and capacity. Typical
battery manufacturer performance data are quoted for an operating temperature between 20 and
25°C (68 and 77°F). Operating above this range will reduce the battery life while operation below this
range will reduce the battery capacity. In a normal installation the battery temperature is maintained between 15°C and 25°C (59 and 77°F). Keep batteries away from main heat sources or main air
inlets etc.
Where the batteries are located externally to the main UPS cabinet, a battery protection device
(e.g., fuses or circuit breakers) must be mounted as close as possible to the batteries themselves, and
connected using the most direct route possible.
1.3.3 Storage
Should the equipment not be installed immediately, it must be stored in a room for protection against
excessive humidity and or heat sources (see Table 30).
CAUTION
!
An unused battery must be recharged periodically per battery manufacturer
recommendation. Temporarily connecting the UPS to a suitable AC supply mains and
activating it for the time required for recharging the batteries can achieve this.
4
Single Module UPS Installation
1.4 Positioning
The cabinet is mounted on four castor-wheels for ease of positioning and for short distance movement.
Jacking feet are provided to prevent the UPS from moving once it has been wheeled to its final position.
For optimal design life, the place chosen must offer:
•Easy connection
• Enough space to easily work on the UPS
• Sufficient air exchange of enough to dispel heat produced by UPS
• Protection against atmospheric agents
• Protection against excessive humidity and very high heat sources
• Protection against dust
• Compliance with the current fire prevention requirements
• Operating environment temperature between 20°C and 25°C (68 and 77°F). The batteries are at
maximum efficiency in this temperature range (see Table 30).
The UPS cabinet is constructed around a steel chassis with removable panels. The top and side panels
are secured to the chassis by screws.
Access to the power terminals, auxiliary terminals blocks and power switches is from the front. Operational status and alarm information is provided through the front door operator control panel. Models 30kVA and below house both the power components and an internal battery. Cooling air enters
the front of the NX and is exhausted out the rear.
1.4.1 System Cabinets
A UPS may comprise a number of cabinets, depending on the design requirements (e.g., UPS cabinet,
external battery cabinet, external bypass cabinet). In general, all the Liebert cabinets used in a particular installation are of the same height and designed to be positioned side-by-side to form a matching
array.
Refer to 4.0 - Installation Drawings for assistance on positioning the cabinets described below.
1.4.2 10 to 30kVA UPS
The UPS consist of a single cabinet, which uses typically forty (40) 12V battery blocks, fitted internally and connected in series to provide a nominal battery voltage.
the batteries fitted.
An extended battery option is available. This comprises a separate cabinet containing additional batteries that can be connected to the UPS to increase its battery run time.
1.4.3 Moving the Cabinets
WARNING
!
Ensure that the UPS weight is within the designated surface weight loading of any handling equipment. See Table 32.
Ensure that any equipment used to move the UPS cabinet has sufficient lifting capacity.
The UPS is fitted with casters. Take care to prevent the NX from moving when unbolting the
unit from its shipping pallet. Ensure that adequate personnel and lifting aids are available
when removing the shipping pallet.
The UPS may be shipped without
UPS and optional cabinets (battery cabinets, top cable entry cabinets, etc.) can be handled by means
of a forklift or similar equipment.
The UPS cabinet also can be moved short distances by its casters.
NOTE
Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum.
5
Single Module UPS Installation
1.4.4 Clearances
The Liebert NX has no ventilation grilles at either side of the UPS. To enable routine tightening of
power terminations within the UPS, in addition to meeting any local regulations, Liebert recommends providing adequate clearance in the front of the equipment for unimpeded passage of personnel with the doors fully opened. It is important to leave of 150mm (5.9") clearance behind the UPS to
permit adequate circulation of air coming out of the unit.
1.4.5 Access
The component layout of the UPS supports front and top access while servicing, diagnosing and
repairing the UPS, thus reducing the space requirement for side and rear access.
1.4.6 Final Positioning
The UPS cabinets are fitted with casters on the base to allow ease of movement and positioning.
WARNING
!
Casters are strong enough for movement across even surfaces only. Caster failure could occur
if they are subjected to shock loading.
When the equipment has been finally positioned, ensure the adjustable feet are set so that the UPS
will remain stationary and stable.
1.4.7 Floor Anchoring
Diagrams in 4.0 - Installation Drawings show the location of the holes in the base plate through
which the equipment may be bolted to the floor. If the equipment is to be installed on a raised floor it
should be mounted on a pedestal suitably designed to accept the equipment point loading. Refer to the
base view Figure 21 to design this pedestal.
1.4.8 Cable Entry
Cables can enter the Liebert NX UPS and battery cabinet from below. Cable entry is made possible by
removing a blanking piece fitted at the bottom of equipment to reveal the cable entry hole.
1.5 External Protective Devices
Circuit breakers or other protective devices must be installed in the AC supply, external to the UPS.
This chapter provides guidelines for qualified installers who must have knowledge of local wiring
practices pertaining to the equipment to be installed.
1.5.1 Rectifier and Bypass Input
Overcurrent protection must be installed at the distribution panel of the incoming main supply. The
protection must discriminate with the power cables current capacity and with the overload capacity of
the system (see Table 35). As a guideline, a thermomagnetic circuit breaker, with an IEC 60947-2
trip curve C (normal) for 125% of the current listed in Table 1 is suitable.
Split-Bypass—If a split-bypass is used, install separate protective devices for the rectifier and for
the bypass in the incoming mains distribution panel.
NOTE
Rectifier and bypass input sources must be referenced to the same neutral potential.
NOTE
For IT power systems, four-pole protective devices must be used, external to the UPS, both
upstream of the input distribution panel and downstream (toward the load).
6
Single Module UPS Installation
Earth Leakage (RCD):
Any residual current detector (RCD) installed upstream of the UPS input supply must be:
• sensitive to DC unidirectional pulses (Class A)
• insensitive to transient current pulses, and
• must have an average sensitivity, adjustable between 0.3 and 1A.
Figure 1 Residual current circuit breakers (RCCB) symbols
To avoid false alarms, earth leakage monitoring devices when used in systems with split-bypass input
or when used in paralleled UPS configurations, must be located upstream of the common neutral
sinking point. Alternatively, the device must monitor the combined four-wire rectifier and splitbypass input currents.
The residual earth current introduced by the RFI suppression filter inside the UPS is greater than
3.5mA and less than 860mA. Liebert recommends verifying the selectivity with all other differential
devices both upstream of the input distribution board and downstream (toward the load).
1.5.2 External Battery
The UPS and its associated batteries are protected against overcurrents through a DC compatible disconnect device.
1.5.3 UPS Output
Any external distribution board used for load distribution shall be fitted with protective devices that
discriminate with those used at the bypass input to the UPS and with the UPS overload characteristics (see Table 35).
7
Single Module UPS Installation
1.6 Power Cables
The cable design must comply with the voltages and currents provided in this section, follow local wiring practices and take into consideration the environmental conditions (temperature and physical
support media).
For cable entry terminal, refer to Figure 22.
WARNING
!
Table 1 Maximum steady state AC and DC currents
Rating
1. Input mains current listed for common rectifier and bypass AC input. For split input the rectifier current is 94% of the currents
2. Non-linear loads (switch mode power supplies) affect the design of the output and bypass neutral cables. The current
3. Protective earth cable: Connect each cabinet to the main ground system must follow the most direct route possible.
4. When sizing battery cables, a maximum volt drop of 4 VDC is permissible at the current ratings given in Table 1. The load
5. For terminal location – refer to 4.0 - Installation Drawings)
Before starting the UPS, ensure that you are aware of the location and operation of the
external isolators that connect the ups input/bypass supply to the mains distribution panel.
Check that these supplies are electrically isolated and post any necessary warning signs to
prevent their inadvertent operation.
WARNING
!
Failure to follow adequate earthing procedures may result in electromagnetic interference or
in hazards involving electric shock and fire.
Input Mains Current
With Full Battery
Recharge
3ph + N
UPS
(kVA)
10 22 21 20 15 14 13 22
15 33 32 31 22 21 20 33
20 44 43 42 30 29 28 44
30 63 62 61 45 44 42 66
listed.
circulating in the neutral cable may exceed the nominal phase current. A typical value is 1.5 In.
The earth conductor shall be sized in accordance with the AC supply fault rating, cable lengths and type of protection. Typical
cross sectional areas are 2.5mm
equipment is generally connected to a distribution board containing individually protected busbars rather than connected
directly to the UPS output. The output cables from paralleled units to the parallel distribution bus should be of same length so
as to optimise the sharing of current. Do not form coils, so as to minimise the formation of electromagnetic interference.
Nominal Current, Amps Busbar Stud Size
1,2
Output Current
at Full Load
3ph + N
2
(10kVA), 6mm2 (15kVA), 10mm2 (20kVA), 16mm2 (30kVA), as per AS / IEC 60950-1
2
Battery at
End of
Discharge
Input/Output/
Bypass
Cables
Hole
Dia.
(mm)
M6 6 M6 5
External
battery
Cables
(Bolts)
Torque
Load
(Nm) 380V 400V 415V 380V 400V 415V Bolt
Table 2 Distance from floor to connection point on the equipment
Minimum Distance
UPS
Rectifier A.C. Input supply 284 (11-1/5)
Bypass A.C. Input supply 284 (11-1/5)
UPS Output A.C. 369 (14-1/2)
Battery Power 369 (14-1/2)
Auxiliary cables: Monitor board (U2) 1104 (43-1/2)
mm (in.)
8
Single Module UPS Installation
1.6.1 Cable Termination
NOTE
Once the equipment has been finally positioned and secured, connect the power cables as described in
the following procedure.
Refer to the appropriate cable connection drawing in 4.0 - Installation Drawings.
1. Verify that the UPS equipment is isolated from its external power source and all the UPS power
2. Open the door to the UPS cabinet and remove the front protective cover to gain access to the
3. Connect the safety earth and any necessary bonding earth cables to the copper earth busbar
The operations described in this section must be performed by authorised electricians or
qualified technical personnel. If you have any difficulties, do not hesitate to contact our
Customer Service and Support Department. See the back page of this manual for contact
information.
isolators are open. Check that these supplies are electrically isolated and post any necessary
warning signs to prevent their inadvertent operation.
connections bars.
located on the floor of the equipment below the power connections. All cabinets in the UPS must
be connected to the user’s ground connection.
NOTE
The earthing and neutral bonding arrangement must be in accordance with local and national
codes of practice.
Identify and make power connections for incoming cables according to one of the two procedures
below, depending on the type of installation.
Common Input Connections
4. For common bypass and rectifier inputs, connect the AC input supply cables between the mains
distribution panel and the UPS input (mA-mB-mC-N terminals) and tighten the connections to
5Nm (M6 Bolt). Ensure correct phase rotation.
Split-Bypass Connections
5. If a split-bypass configuration is used, connect the AC input supply cables to the rectifier input
busbars (mA-mB-mC-N terminals) and the AC bypass supply cables to the bypass input
(bA-bB-bC-N terminals) and tighten the connections to 5 Nm (M6 Bolt). Ensure correct phase
rotation.
NOTE
For split-bypass operation, ensure that the linking busbars between bypass and rectifier input
are removed.
The AC input and the AC bypass supplies must be referenced to the same neutral point.
Frequency Converter Mode
If a frequency converter configuration is used, connect the AC input supply cables to the rectifier
input busbars (U1-V1-W1-N terminals) to 5Nm for M6 bolts, to 13Nm for M8 bolts or to 26Nm (M10
bolt). Ensure correct phase rotation and tighten the connections. There will not be any AC
bypass supply cables to the bypass input (U3-V3-W3-N terminals).
NOTE
For frequency converter operation, ensure that the linking busbars between bypass and rectifier
input are removed.
9
Single Module UPS Installation
Output System Connections
6. Connect the system output cables between the UPS output (oA-oB-oC-N terminals) and the
critical load and tighten the connections to 5 Nm (M6 Bolt). Ensure correct phase rotation.
WARNING
!
If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, ensure that the system output cables are safely isolated at their ends.
Internal UPS Battery Connection
7. The battery consists of a series string connection of 5 x 8 (or 10) x 12V 6-cell battery blocks.
a. Ensure that the 8 (or 10) battery blocks in each tier (tray) are interconnected.
b. Connect the positive, neutral and negative cables to the UPS terminals.
c. Plug in the cables between the tiers.
d. Ensure correct polarity battery string series connections (i.e., intertier and
interblock connections are from positive to negative terminals.
WARNING
!
Hazardous Battery Terminal Voltage 480VDC
Ensure correct polarity of string end connections to the UPS terminals, i.e., positive to
positive, negative to negative and neutral to neutral, but leave these UPS terminal cables
disconnected until connection is authorised by the commissioning engineer.
Ensure correct polarity of string end connections to the battery circuit breaker and from the
battery circuit breaker to the UPS terminals, i.e., positive to positive and negative to negative,
but disconnect one or more battery cell links in each tier.
Do not reconnect these links and do not close the battery circuit breaker before authorised by
the commissioning engineer.
8. Refit all protective covers removed for cable installation.
10
Single Module UPS Installation
1.7 Control Cables and Communication
1.7.1 Monitor Board Features
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker, battery temperature sensor), communicate with a personal
computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO).
The monitor board, arranged for this purpose, is located on the rear of the operator access door. The
main features are:
• Input and Output dry contacts signal (one pair of contacts of relay)
• Emergency Power Off control (EPO)
• Environmental parameter input interface
• User communication (for data setting and user background monitor)
• Intellislot™ interface
• Modem interface
• Temperature detect interface
Figure 2 Auxiliary terminal block detail monitoring board (U2)
J8
LCD
J1J3
J22
X7
J2
J13
BFP INV ACF
X1 X2 X3
EPO
J10J30J26J4J28J25J2 1
Dry In MBC BCB
J23
J12
J9
J15
J16
J17
Intellislot 2
Intellislot 1
Intellislot 3
The black square ( )
on each slot indicates Pin 1.
X4
J24
X6
PWR
Modem
SNMP Car d
X4
X5
11
Single Module UPS Installation
1.8 Dry Contacts
The UPS provides input dry contacts and output dry contacts.
1.8.1 Input Dry Contacts
There are several input dry contacts at the X3 slot.
Figure 3 Input dry contacts
12V
12V 12V
12V
X3
J4 J26 J30 J10
12V
BtG
GEN
ENV
12V
GND
AUX_ I
X3 Ancillary Control and Alarms
X3 IN DRY: Environmental, Battery Ground Fault and Generator Contacts
The UPS accepts external signalling from voltage-free (dry) contacts connected to finger-proof, push-in terminal X3 IN DRY. Subject to prior software programming, the signalling is accepted by the UPS when
connection between the relevant terminal and the +12V terminal is altered. Cables connected to X3 IN
DRY must be segregated from power circuits (for screening purposes), double insulated and of a typical 0.5
to 1mm
2
cross-section area for maximum runs between 25 and 50 meters (82-164 ft), respectively.
Table 3 Input dry contacts at X3
Position
J4.1 ENV
J4.2 BtG Battery Ground Fault Detection (NC)
J4.3 GEN
J4.4 +12V +12V Power
1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.
Name
Description
3
Battery Room Alarm (NC)
1,2
On Generator (NO)
1.8.2 Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 4 Maintenance bypass cabinet interface
Position
J26.1 T_IT
J26.2 AUX_I Reserved
J26.3 +12V +12V Power
J26.4 GND Power Ground
J30.1 FUSE Reserved
J30.2 F_FAN Fan Fail Alarm (NC)
J30.3 T_OT
J30.4 AUX_O Reserved
1
- Must be configured by software before becoming active
Name
Description
1
Input transformer overtemperature (NC)
1
Output Transformer Overtemperature (NC)
T_IT
T_OT
AUX_O
FUSE
F_F AN
OL
FB
GND
DRV
NOTE
2
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
12
Single Module UPS Installation
1.8.3 External Circuit-Breaker Interface
J10 is the interface to any external battery circuit breaker (BCB).
Table 5
Position
J10.1 DRV BCB Driver Signal - (reserved)
J10.2 FB BCB Contact State -(reserved)
J10.3 GND Power Ground
J10.4 OL BCB On-Line - Input - This pin will become active when BCB interface is connected. (N.O.)
External circuit-breaker interface
Name
Description
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
Figure 4 Jumper connection for BCB interface
UPS Monitoring Board
J10
FB
OL
OL
DRV
GND
Battery Circuit Breaker
Aux – N.O.
Aux – N.O.
2
13
Single Module UPS Installation
1.8.4 Output Dry Contacts
There are three output dry contact relays at the X1 slot (see Figure 5 and Table 6)
Figure 5 Output dry contacts and EPO wiring
+12V
J13
BFP_C
BFP_S
BFP_O
J21 J25 J28
INV_S
INV_C
INV_O
ACF_S
ACF_C
ACF_O
EPO - NCEPO - NO
Table 6 Output dry contact relays
Position
J13.2 BFP_O Bypass feedback protection relay; normally open; closed when bypass SCR is shorted
J13.3 BFP_S Bypass feedback protection relay center
J13.4 BFP_C Bypass feedback protection relay; normally closed; open when bypass SCR is shorted
J21.2 INV_O Inverter mode relay; normally open; closed when UPS is in inverter mode
J21.3 INV_S Inverter mode relay center
J21.4 INV_C Inverter mode relay; normally closed. Opened when UPS is in inverter mode
J25.2 ACF_O Main input fault relay; normally open. Closed when main input is in fault
J25.3 ACF_S Main input fault relay center
J25.4 ACF_C Main input fault relay; normally closed. Open when main input is in fault
Name
Description
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
2
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
X2X1
14
Single Module UPS Installation
1.8.5 Emergency Power Off Input
The UPS has an Emergency Power Off (EPO) function that operates by a button on the control panel
or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 5, is the remote EPO input interface. The EPO has an NO/NC contact
point that becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1
If an external emergency stop facility is required, it is connected terminals X2: 1&2 or X2: 3&4 of the
auxiliary terminal block (X2). It also is connected to the normally open or normally closed remote stop
switch between these two terminals using shielded cable (see Figure 5 and Table 7). If this function
is not used, terminals X2: 3&4 must be opened and X2: 1&2 must be closed.
Table 7 EPO input contact relays
Position Name Description
J28.1 EPO_NC EPO activated when opened to J28.2
J28.2 EPO_NC EPO activated when opened to J28.1
J28.3 EPO_NO EPO activated when shorted to J28.4
J28.4 EPO_NO EPO activated when shorted to J28.3
NOTE
The emergency stop action within the UPS shuts down the rectifier, inverter and static bypass.
It does not internally disconnect the input power supply. To disconnect ALL power to the UPS,
open the upstream feeder breaker(s) when the remote EPO is activated.
NOTE
Normally closed EPO – X2: 1,2, these terminals are supplied factory-linked on the monitor
board and must remain installed if using NC contacts.
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm
2
(16-20AWG) stranded for maximum runs between 25 and 50 meters (82-164ft.) respectively.
X5: Auxiliary DC Power Output
Auxiliary DC power for modem or external SNMP card. The voltage is between 9V to 12V. The maximum current is 500mA.
X6: Analog Input Interface
Two analog signal channels with an input range is from 0 to +12V. The precision of detection is ÷3%.
• X6 pin 1: Not used
• X6 pin 2: +12V
• X6 pin 3: ENV-T – environment temperature detection
• X6 pin 4: GND
X7: External Battery Temperature Detector Interface
Interface for TMP12Z temperature detector, normally connected to an external battery cabinet (see
Figure 7).
Pin reference:
• X7 pin 1: Not used
• X7 pin 2: +12V (Power supply for Temperature Monitoring Probe)
• X7 pin 3: BAT-T (Battery Temperature signal)
• X7 pin 4: GND
15
Single Module UPS Installation
Serial Ports RS232-1 and RS232-2
RS232-1 provides serial data and is intended for direct use with Liebert MultiLink monitoring and
server shutdown software.
RS232-2 provides serial data and is intended for use by authorized commissioning and service personnel.
These serial ports are shared with the optional Web browser, SNMP, ModBus and relay cards. Refer
to Table 28 regarding compatibility of simultaneous use.
Intellislot Web Browser, SNMP, ModBus and Relay Cards Interface
There are three interface slots available for optional Web browser, SNMP, ModBus and Relay cards
as illustrated in 8.0 - Options—For Assembly Inside the UPS Cabinet.
1.8.6 External Bypass Switch Interlock
EXT-Maint X3-1&2 on UPS Parallel Board M3 (leave open if no external bypass switch is used)
Provides external maintenance bypass interlock protection for the UPS. Short circuit means external
bypass closed.
EXT-Out (X3-3&4) on UPS Parallel Board (leave shorted if no external output switch is used). Provides external output interlock protection for paralleled UPS modules. Short circuit means external
output switch closed.
NOTE
UPS Parallel Board M3 is located behind protective covers accessible after opening the UPS
front door – removal of this barrier requires the use of a tool and is restricted to service
personnel.
NOTE
Jumper JP1 (located next to X3) needs to be removed for X3:3&4 to work properly.
1.8.7 Battery Start Facility
1. Rotate the switch to Normal Mode.
2. Verify that the batteries are connected.
3. Press Battery Start Button.
The LCD begins to show startup screens. The rectifier indicator flashes green while the rectifier is
starting up. It stops flashing and becomes solid green about 30 seconds after the rectifier enters
the normal operation state.
4. After UPS has initialized, press Inverter On
Figure 6 Battery start for UPS
Battery Start Button
16
Battery Installation
2.0 BATTERY INSTALLATION
2.1 Introduction
The UPS battery bank consists of battery blocks connected in series to provide a D.C. string voltage as
required by the UPS converter. The 'AUTONOMY TIME' (the time during which the battery can
maintain supply to the load in the event of a mains failure) is limited by the ampere-hour capacity of
the battery blocks and in some cases this results in several strings being connected in parallel.
The NX usually has internal batteries, but longer run time is available by using an external battery
cabinet.
The battery cabinet will be supplied in one of the following forms:
1. Complete installation, comprising the battery cabinet, batteries and protective device.
2. Battery cabinets and protective device only—batteries supplied by others
NOTE
10kVA to 30kVA UPS models contain an internal battery compartment that can accommodate
up to 44 blocks of batteries for 12Ah/12V; 80 blocks of batteries for 7.2Ah/12V
The battery bank may be disconnected from the UPS for maintenance or service.
17
Battery Installation
2.2 Safety
Special care should be taken when working with the batteries associated with the Liebert NX UPS
system. When all the cells are connected together, the battery terminal voltage is potentially hazardous. The battery installation must be segregated from all but appropriately qualified maintenance
personnel by locating the cells in a key-lockable cabinet or in a purpose-designed, dedicated battery
room. When the batteries require maintenance, these precautions must be taken:
• The rotary switch must be turned to Maint. position.
• The input circuit breaker (CB1) must be opened.
• The ANDERSON connector must be disconnected..
NOTE
The fuse on the battery EMI board (UHA241A2-10kkVA, UHK241A2-15/20kVA,
UHS242A2-30kVA) is 600VDC/30A, High Speed Fuse.
NOTE
Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturers manuals. The battery safety information contained in
this section relates to key considerations that must be taken into account during the
installation design process and might affect the design outcome depending on localised
conditions.
WARNING
!
Hazardous battery voltage present behind covers
No user-serviceable parts are located behind covers that require a tool for their removal. Only
qualified service personnel are authorised to remove such covers.
When using internal batteries in 10 to 30kVA units, the batteries are always connected
through power fuses to the UPS and to the segregated terminal bars available for connection
to an external battery.
Isolate any internal battery connections before attempting to access the segregated terminal
bars available for connection to an external battery.
The following general battery safety precautions and warnings should be observed at all
times:
• A battery can present risk of electric shock or burn from high- short-circuit currents.
• The full nominal string voltage, when the battery blocks are interconnected, is 480VDC,
which is hazardous
• Only qualified personnel should install or service batteries.
• Eye protection should be worn to prevent injury from electrical arcs.
• Remove rings, watches, necklaces, bracelets and all other metal objects.
• Use only tools with insulated handles.
• Wear rubber gloves and a rubber apron when handling batteries.
• If a battery leaks electrolyte or is otherwise damaged, it should be placed in a container
resistant to sulfuric acid and disposed of in accordance with local regulations.
• If electrolyte comes into contact with the skin the affected area should be washed immediately with plenty of clean water.
• Batteries must always be disposed of according to local environmental laws.
• When replacing batteries, use the same number and type that were originally fitted.
• Disconnect charging source before connecting or disconnecting battery terminals.
• Determine whether the battery is inadvertently grounded. If it is inadvertently grounded,
remove the source of the ground. Contact with any part of a grounded battery can result in
electrical shock.
18
Battery Installation
2.3 Battery Cabinet
2.3.1 Introduction
This cabinet can also be used in conjunction additional cabinets, to provide the necessary accommodation required by the larger cells associated with system’s having a long autonomy time.
Where two (or more) cabinets are used they are positioned alongside each other and secured and
bonded together. If the cabinet(s) is located immediately adjacent to the main UPS equipment the two
units are bolted together.
2.3.2 Temperature Considerations
Valve-regulated, lead acid battery cells are sensitive to ambient temperature and should be operated
between 15°C and 25°C (59-77°F). Battery capacity is increased by 1% for every 1°C (2°F) increase in
temperature up to 25°C (77°F). Battery life is reduced at temperatures above 25°C (77°F).
When batteries are mounted in the same room as the UPS unit, it is the battery that dictates the
designed maximum ambient temperature, not the UPS. — i.e. in the case of valve-regulated cells, the
ambient room temperature should be kept between 15°C and 25°C (59-77°F), and not between 0°C
and 40°C (32-104°F) (which is the specified main equipment operating temperature range). Temperature deviations are permissible for short periods, provided the average temperature does not exceed
25°C (77°F).
2.3.3 Dimensions
The external dimensions are shown in Table 8. These are the same height and depth as the UPS
module and provide a matching appearance when bolted together. All cabinets are fitted with doors,
which must be fully opened in order to fit or remove the batteries. The door swing must therefore be
taken into consideration when planning the positioning of the cabinets.
2.3.4 Weight
The unladen weight is shown below in Table 8. When designing the battery installation the weight of
the batteries and cables must be added to the unladen weight. This is particularly important when
placing the NX on a raised floor.
Table 8 Dimensions and weight
Optional
Model
Battery Cabinet
Circuit Breaker
Amperes
50A
80A 30kVA 66A
2.3.5 Circuit Isolator Features
The UPS is fitted with Anderson connectors and fuses for connection and disconnection of internal
batteries. External battery banks require battery fuses or circuit breaker (with optional status contacts). Refer to 1.8.3 - External Circuit-Breaker Interface for details.
Maximum
Discharge Current
(at EOD)
10kVA 22A
15kVA 33A
20kVA 44A
External Cabinet
WxDxH mm (in)
820x700x1400
(32-1/4x27-5/8x55)
Cabinet Weight
Without Batteries
kg (lb)
170 (375)
19
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