Unipower Guardian Access 3U, FMPe20.48G, FMPe30.48G, FMP25.48G Instruction Manual
POWERING TECHNOLOGY
Power Supply System
Guardian Access 3U
Instruction Manual
www.unipowerco.com
Document Number: MS0027-MAN rev. 4
guardian_access_3u_ms27-man-rev4-0817.indd
© 2017 UNIPOWER LLC
All Rights Reserved
UNIPOWER LLC • 3900 Coral Ridge Drive, Coral Springs, Florida 33065, USA • sales@unipowerco.com
North America: +1 954-346-2442 • Europe: +44 1903 768200
POWERING TECHNOLOGY
Copyright © 1999-2017 UNIPOWER LLC
All Rights Reserved
Restricted Rights Legend:
Use, duplication, or disclosure by the Government is subject to restrictions as set forth in
subparagraph © (1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS
252.227-7013 or subparagraphs © (1) and (2) of Commercial Computer Software - Restricted
Rights at 48 CFR 52.227-19, as applicable.
For Contact Information, please go to http://www.unipowerco.com/contact/
Refer to the UNIPOWER License Agreement in this package before installing or using this product.
Unless specically noted, all addresses, data characters and persons referenced herein, and all
examples involving names of companies and products, are ctitious examples and are designed
solely to illustrate the use of UNIPOWER products.
Product names, logos, brands, and other trademarks featured or referred to within this product
manual are the property of their respective trademark holders. These trademark holders are not
aliated with UNIPOWER LLC or our products. They do not sponsor or endorse our products.
LIMIT ATIONS AND AUTHORIZA TIONS FOR USE AND PERMITTED APPLICA TIONS
UNIPOWER’s products are not designed, intended for use in, or authorized for use as critical
components in, human life support systems/equipment, equipment used in hazardous environments,
or equipment used in nuclear control equipment or systems. Any such use requires the prior
express written consent of an authorized executive ocer of UNIPOWER LLC, which consent
may be withheld by UNIPOWER LLC in its sole discretion. Users assume all risk and liability for,
and agree to indemnify and defend UNIPOWER from and against any claims for personal injury
(including death) or property damage resulting from any such use or application which is made in
the absence of such prior express written consent.
If you nd errors or problems with this documentation, please notify UNIPOWER. UNIPOWER
does not guarantee that this document is error-free. The information in this document is subject to
change without notice.
Manual No. MS0027-MAN rev. 4
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Contents
Chapter 1 About This Manual ......................................................................................................6
1.1 Objectives ..................................................................................................................................6
1.2 Audience ....................................................................................................................................6
1.3 Document Key ...........................................................................................................................6
1.4 Feedback & Support ..................................................................................................................7
1.5 Disclaimer ..................................................................................................................................7
Chapter 2 System Description ......................................................................................................8
2.1 Overview ....................................................................................................................................8
2.2 System Parameters
2.3 System Components.................................................................................................................13
2.3.1 System Controller ...........................................................................................................13
2.3.2 DC Distribution Unit.......................................................................................................13
2.3.3 Rectier Module .............................................................................................................14
Chapter 3 System Safety..............................................................................................................15
3.1 Safety Warnings and Guidelines ..............................................................................................15
3.1.1 System Markings ............................................................................................................15
3.1.2 Safety Recommendations ................................................................................................15
3.1.3 Installation W arning ........................................................................................................16
3.1.4 Restricted Access Area W arnings....................................................................................16
3.1.5 System Enclosure ............................................................................................................16
3.1.6 Operating Temperature Warnings ...................................................................................16
3.1.7 Electrical Safety Warnings ..............................................................................................17
3.1.8 Grounding .......................................................................................................................18
3.1.9 Batteries ..........................................................................................................................18
3.1.9.1 Lead Acid Batteries .............................................................................................18
3.1.10 In Case of an Accident ..................................................................................................19
3.2 Caution .....................................................................................................................................19
3.2.1 Storage and Transportation .............................................................................................19
3.2.2 Disposal...........................................................................................................................19
3.2.3 Handling Electrostatic Sensitive Devices .......................................................................19
3.2.4 Traceability .....................................................................................................................19
3.2.5 Breakers ..........................................................................................................................20
3.2.6 Hot Surfaces ....................................................................................................................20
...................................................................................................................11
Chapter 4 Installation Guide ......................................................................................................21
4.1 Preparation ...............................................................................................................................21
4.1.1 Installation Overview ......................................................................................................21
4.1.2 Unpacking .......................................................................................................................21
4.1.3 T ools ................................................................................................................................22
4.1.4 Cable Size .......................................................................................................................23
4.2 Rack Mounting .........................................................................................................................24
Manual No. MS0027-MAN rev. 4
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4.3 Cable Entry ..............................................................................................................................26
4.3.1 Remove Top Cover .........................................................................................................26
4.3.2 Cable Entry Openings .....................................................................................................27
4.5 AC Input Connection ...............................................................................................................29
4.6 DC Load Connection ...............................................................................................................31
4.7 Battery Connection ..................................................................................................................32
4.8 Alarm and Signal Connections .................................................................................................32
4.9 Symmetry Connection .............................................................................................................35
4.10 Temperature Sensor Connection ............................................................................................36
4.11 Connecting an RS232 Communication Cable .......................................................................37
4.12 Rectier Installation
...............................................................................................................37
4.13 Reinstalling Top Cover ..........................................................................................................38
Chapter 5 Commissioning
5.1 Commissioning Overview
...........................................................................................................39
.......................................................................................................39
5.2 T ools and Test Equipment ........................................................................................................39
5.2.1 T ools List .........................................................................................................................39
5.2.2 T est Equipment ...............................................................................................................39
5.3 Preparation
5.4 Commissioning procedure
...............................................................................................................................39
.......................................................................................................40
5.5 Test of output voltage ...............................................................................................................41
5.5.1 Float charge (U1) ............................................................................................................41
5.5.2 Adjustment of Float Charge, U1 .....................................................................................41
5.5.3 Boost charging (U2) (if applicable) ................................................................................41
5.6 Battery supervision
..................................................................................................................42
5.7 Battery test ...............................................................................................................................42
5.8 Commissioning record .............................................................................................................43
Chapter 6 Maintenance & Troubleshooting ..............................................................................44
6.1 Maintenance
.............................................................................................................................44
6.1.1 Checking Terminal Connection ......................................................................................44
6.1.2 Other Requirements ........................................................................................................44
6.2 Troubleshooting .......................................................................................................................45
Chapter 7 Replacing Modules .....................................................................................................49
7.1 Controller Replacement
7.2 Rectier Replacement
...........................................................................................................49
..............................................................................................................49
7.3 Battery and Load Breakers Replacement .................................................................................50
7.4 Surge Protection Device Replacement .....................................................................................50
Appendix A - Drawings ................................................................................................................51
A.1 System Layout
A.2 Installation Details - Connections
A.3 Block Diagram
A.4 Detailed Dimensions
Manual No. MS0027-MAN rev. 4
.........................................................................................................................51
...........................................................................................52
........................................................................................................................53
...............................................................................................................54
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FIGURES
Figure 2-1 Power System Overview .............................................................................................8
Figure 2-2 Principal of Operation .................................................................................................9
Figure 2-3 Power System With Extension Rear and Top Cover Kit ..........................................10
Figure 2-4 Power System with Rear and Top Cover Kit ............................................................10
Figure 2-5 Guardian Rectier .....................................................................................................14
Figure 4-1 System Mounting - Cabinet ......................................................................................24
Figure 4-2 System Mounting - Open frame / relay rack .............................................................25
Figure 4-3 Remove Top Cover ...................................................................................................26
Figure 4-4 Remove Top and AC Input Cover .............................................................................27
Figure 4-5 Cable Entry Options ..................................................................................................27
Figure 4-6 Grounding Connection ..............................................................................................28
Figure 4-7 Grounding Connection with Extended Rear Cover - Two Point ..............................28
Figure 4-8 Grounding Connection with Extended Rear Cover - Single Point ...........................29
Figure 4-9 AC Input Terminal Block (1-phase) ..........................................................................30
Figure 4-10 AC Input Terminal Block (3-phase) ..........................................................................30
Figure 4-11 DC Load Connection ................................................................................................31
Figure 4-12 Battery Connection ...................................................................................................32
Figure 4-13 PCC External Board ..................................................................................................33
Figure 4-14 ACC External Board .................................................................................................33
Figure 4-15 ACC Relay Board .....................................................................................................34
Figure 4-16 2-block Symmetry Measurement (for illustration only) ...........................................35
Figure 4-17 4-Block Symmetry Measurement (for illustration only) ..........................................35
Figure 4-18 Temperature Sensor Connection ...............................................................................36
Figure 4-19 RS232 Connection ....................................................................................................37
Figure 4-20 Rectier Installation ..................................................................................................38
Figure 7-1 Unlocking and Removing the Controller ..................................................................49
Figure 7-2 Replacing a Surge Protection Module ......................................................................50
TABLES
Table 4-1 Recommended Electrical Cable Size ........................................................................23
Table 5-1 Float/Boost Charge Voltages .....................................................................................41
Table 5-2 Commissioning Record .............................................................................................43
Table 6-1 Connection Torque Setting Check ............................................................................44
Manual No. MS0027-MAN rev. 4
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Chapter 1 About This Manual
1. About This Manual
This chapter contains an overview of the information that is presented in this Power System
Manual. This includes information on objectives, the intended audience, and the organization
of this manual. In addition, this chapter also denes the conventions used to indicate warnings,
cautions and noteworthy information.
1.1 Objectives
This manual describes the Power System, explains how to unpack and install the system,
how to perform the initial power-up and operational system check.
The information presented in this document is current as of the publication date.
1.2 Audience
This manual is to be used by installers and technicians who are preparing the site for a new
installation and installing the power system. This manual assumes that the technician has an
understanding of power systems in general and understands safety procedures for working
around AC and DC voltage.
The user of this document should be familiar with electronic circuitry and wiring practices
and have some expertise as an electronic, power, or electromechanical technician.
1.3 Document Key
This manual uses the following conventions:
WARNING This symbol indicates a situation that could cause bodily injury .
Always be aware of hazardous conditions when working in or around the
power system.
CAUTION This symbol indicates a situation that might result in equipment
damage. The reader should be aware that their actions could result in
equipment or data loss.
NEED MORE INFORMATION? This symbol is used to reference
information either in this manual or in another document.
NOTE This symbol means the reader should take note. Notes are helpful
suggestions or reminders.
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
T able 1-1 Abbreviations
Abbreviation Description
ACC Advance Controller Card
ACDU AC Distribution
DC Distribution Cabinet
EC Extension cabinet
FMD Fan-cooled Modular Power Converter
FMP Fan-cooled Modular Power Rectier
GDN Guardian system
Genset Diesel Generator
HCC Lite Hybrid Controller Card Lite
LVD Low voltage disconnection
MC Main Cabinet
MCCB Molded Case Circuit Breaker
MCB Miniature circuit breaker
P1 Power One
PBC P1 Battery Cabinet
PBDU P1 Battery Distribution Unit
PCC Prime Controller Card
PDU P1 Distribution Unit
PLD Partial load disconnection
SLI SLI Inverter
1.4 Feedback & Support
For technical support or feedback, please visit http://www.unipowerco.com/contact/.
Alternatively, email: technical.support.repair@unipowerco.com
1.5 Disclaimer
UNIPOWER is not responsible for system problems that are the result of installation or
modication of the instructions provided in this manual.
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
6
4
1
Chapter 2 System Description
2.1 Overview
This chapter contains an overview of the system and a short description of the units in the
system.
The Guardian Access 3U power system is designed to meet the requirements of modern
telecommunications equipment. This power solution provides rectication, system
management and power distribution. The power system is based the Guardian family of
on fan-cooled, hot-swappable rectier modules FMPe20.48G, FMP25.48 or FMPe30.48G;
each with an output of up to 2000W , 2500W or 2900W respectively. T wo additional modules
FMP20.48 and FMPe30.48C at 2000W and 2900W are also available in the Asia / Pacic
region.
The power system can be managed locally through messages and alarms displayed on the
LCD screen of system controller, or remotely using the PC-based PowCom™ software
package.
The power system contains 3 or 5 rectier positions and modules depending on your order,
one system controller, and distribution unit.
The Guardian Access 3U system consists of:
1. System Controller
2. Internal Connection Board
3. Rectier Module
4. Load and Battery Distribution
7
2
Figure 2-1 Power System Overview
5. Alarm Interface Board
6. AC Surge Protection Device (Option)
7. AC Input Terminal Block
5
3
NOTE If you order a power system with 3 rectier positions, the bottom two slots will be
unavailable and should be left blank.
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
The Guardian Access 3U is capable of delivering up to 14.7kW steady state power to the
combined load and batteries. The maximum power available to the load is 10.7kW. The
system is based on hot-swappable 48V rectier modules which are working in parallel with
automatic load sharing.
The power system is normally congured with N+1 redundancy, with N as the number
of rectier modules necessary for feeding the load and charging the battery and 1 as the
redundant rectier module. In normal operation the rectier modules are used to feed the
load and simultaneously maintain the batteries in a fully charged state.
Once the mains input power is failed, the rectiers are shut down and the batteries feed
the load immediately. If the battery voltage drops below a preset level, the Low Voltage
Disconnection (L VD) circuit disconnects the batteries automatically to prevent over-discharge
of the battery to prolong battery life. When the mains input power is restored, the rectiers
will start up automatically to feed the load, close LVD circuit and recharge the batteries.
System performance is supervised and controlled by the controller, PCC or ACC Extended.
The DC output voltage, alarm thresholds, LVD circuit operation, temperature compensated
battery charging can be set by the controller . Any malfunction will be indicated by LED, text
in the display and operation of dry contacts.
However, the system controller is not a single point of failure. In the event of controller
malfunction, basic tasks like feeding the load and charging batteries will be maintained by
the rectier modules directly at preset default values.
The alarm and threshold setting of the power system can be set either through the buttons
and operation menu on the local controller, or remotely through the PowCom™ supervision
software.
Controller
DC Distribution
AC
Rectifier
Rectifier
Load Breakers
LVBD
Battery Breaker
Manual No. MS0027-MAN rev. 4
Battery
Figure 2-2 Principal of Operation
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POWERING TECHNOLOGY
DC & Alarm
Cable Entry
AC Cable Entry
DC & Alarm
Cable Entry
AC Cable Entry
To meet the requirements of dierent application, there are two kinds of Rear and Top Cover
Kit available:
• Rear and Top Cover Kit for cabinets
• Extension Rear and Top Cover Kit for open relay racks.
Figure 2-3 Power System With Extension Rear and Top Cover Kit
NOTE The cable entry on the rear of the shelf is factory supplied and opened. If you want
to route the cables from the bottom or side, remove the knockouts. For AC cable entry , you
have to install the supplied PG21.
Figure 2-4 Power System with Rear and Top Cover Kit
NOTE The Rear and Top Cover Kit and Extension Rear and Top Cover Kit are optional
components and just provided according to your order.
Manual No. MS0027-MAN rev. 4
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2.2 System Parameters
OUTPUT
Power (max) 10.7kW load + 4kW battery charge @ 230/400VAC nominal
9.4kW load + 4kW battery charge @ 120VAC nominal
Output Current (max) 200A load + 75A battery charge @ 230/400VAC nominal
175A load + 75A battery charge @ 120VAC nominal
Voltage 44-57.6VDC
INPUT
Voltage Range 100-120VAC, 1W+N+PE, 50/60Hz
200-240VAC, 2W+PE, 50/60Hz
208-240/360-416VAC, 3W+N+PE, 50/60Hz
Frequency 47-63Hz
Input Current 1-phase 82A @ 100-120VAC, 65A @ 200-240VAC
3-phase 25A per phase @ 230/400VAC
Power factor >0.98
Surge Protection Optional
DC DISTRIBUTION & BATTERY MANAGEMENT
Battery Breakers 1, 2 or 3 x 80A, 100A or 125A
Symmetry Inputs Up to 6
Programmable LVD / PLD 125A or 200A (voltage) / 125A or 200A (voltage/time)
Load Breakers 9 x 18mm / 13 x 13mm, depending on number of battery breakers.
Ratings
(see datasheet for details)
single pole - 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
two pole - 80A, 100A; three pole - 125A, 150A
MONITORING AND CONTROL
Controller PCC or ACC Extended
Local Interface 4 x 20’ LCD, 4-key menu, USB (ACC only) and RS232
Remote Interface Ethernet / Modem using PowCom™ software
Visual Indication Green LED - System On
Yellow LED - Message(s)
Red LED - Alarm(s)
Analog Inputs 12 x voltage inputs (range 0-100VDC) - 6 max. for symmetry
Alarm Outputs 4 x potential free relays (C, NC, NO)
Digital Inputs 2 x, Logic 0: U<10VDC, Logic 1: U>12VDC (ACC only)
Digital Outputs 2 x, open collector type (ACC only)
Temperature measurement 2 x Temperature probe (Battery, Ambient)
CONNECTIONS
Battery connections M8 lugs, +Ve common from bus bar
AC connections Max. 7AWG/10mm
2
, screw type connector
Load breaker connections -Ve termination direct to breakers, +Ve common from busbar
11AWG/4mm²
Alarm connections Max. 14AWG/1.5mm², screw type connector
Manual No. MS0027-MAN rev. 4
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MECHANICAL
Dimensions (WxHxD) 19” (483mm) x 5.2” (133mm) x 16.1” (408mm) std cover | 19.1”
(485)mm ext. cover
Weight of the system
67lbs (30.5kg)
(fully equipped)
Mounting Options 19”/ Mid-mount
Cable Entry Rear Access (top/rear covers have to be removed to make
connections)
STANDARD COMPLIANCE / ENVIRONMENTAL
EMC and Immunity EN 300 386 ; EN61000-6-3 (Emission) ; EN61000-6-2 (Immunity)
Safety IEC60950-1:2005 2 Ed. +A1:2009
Environment
Storage : ETS300 019-2-1, Transport: ETS300 019-2-2, Operation
ETS300 019-2-3, Damp Heat: IEC60068-2-78
Operating Temperature -40°C to +65°C (derated above 55°C)
Storage Temperature -40°C to +85°C
RECTIFIER MODEL FMPe20.48G FMP25.48G FMPe30.48G
Eciency 96% 92.5% 95%
Input Current (max) <11.6A <16.8A <17.0A
Output Current
37.4A 46.7A 54.2A
(53.5V oat)
Output Power 1100W @ >180VAC
2000W @ 90-180VAC
Operating Temperature
55°C 55°C 55°C
1400W @ >180VAC
2500W @ 90-180VAC
1700W @ >180VAC
2900W @ 90-180VAC
(without derating)
Input Voltage
90-300VAC 85-300VAC
(Nominal 100-240VAC)
Output Voltage 44-57.6VDC
Load sharing < 5% of nominal current
Dimensions (HxWxD) 1.6 (41) x 4.2 (107) x 14 (355) ”(mm)
Weight 4.6lbs / 2.1kg
Cooling Fan-cooled, speed controlled
Protection Short circuit, automatic current/power limiting,
input/output overvoltage, thermal
Alarms Fan failure, Short circuit/arcing protection,
High temperature/output voltage Low output voltage,
Input voltage out of range Low fan speed (warning)
Internal communication failure
LED Indication Green:
AC normal operation
Yellow: Steady - Low fan speed, High temperature
Flashing - Communications failure
Red: Module alarm / shutdown
Audible noise <45dBA @ ≤25°C (50% load) | <60dBA (100% load)
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
NOTE For details of FMP20.48 and FMP30.48C available only in APAC region please
see individual datasheets.
2.3 System Components
With the exception of the rectier modules the Guardian Access 3U system is delivered with
all components mounted according to the ordered conguration. The main components are
described below and in later chapters of this manual.
2.3.1 System Controller
The Guardian power system can be controlled by the ACC Extended or PCC controller.
The description and operation of these controllers is covered in separate manuals which
are available at:
ACC Extended: http://www.unipowerco.com/pdf/acc-man.pdf
PCC: http://www.unipowerco.com/pdf/pcc-man.pdf
2.3.2 DC Distribution Unit
The distribution unit includes congurable load breakers, battery breakers, a shunt for
battery current measurement and fuse alarms for load and battery breakers.
The distribution unit has no special operation other than switching the load and battery
breakers on and o. All trip states of breakers are supervised by measuring the voltage
drop across each breaker.
Breakers that are not connected to any load will not cause a breaker alarm even if they
are left open.
A battery fuse alarm may not be triggered instantly when a battery breaker is o. The
alarm is triggered only when the voltage drop between the system voltage and the battery
voltage is more than 1.5V. The interval that the voltage drop increases to 1.5V depends
on the battery status.
Due to a small leakage current (2.5-3mA) through the alarm circuit, the voltage measured
with a Digital Volt Meter (DVM) on an open breaker output will be nearly equal to the
rectier output voltage.
The distribution module has common “+Ve” with load breakers in “-Ve” leg. For more
information see schematic drawing in Appendix A - Drawings.
Manual No. MS0027-MAN rev. 4
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Cooling Fans
Status LEDs
2.3.2.1 Low Voltage Disconnect (LVD) and Dummy LVD
Generally , the system is equipped with low voltage battery disconnection, which prevents
the batteries from deep discharging, thus prolonging the battery life. A disconnection
requires a detected mains failure at the supervision unit.
If disconnection occurs, the batteries will not supply power to the load until they have
been recharged to set voltage level, which can be adjusted by the user.
If disconnection occurs, the batteries will be reconnected when mains supply returns.
A dummy LVD can also be installed into the power system if the Low Voltage
Disconnection function is not needed.
2.3.2.2 Partial Load Disconnection / Load Shedding (PLD)
Partial load disconnection can be congured to be voltage or time dependent, this is
selected when ordering the power system.
At a mains outage the controller will open the PLD contactor when the batteries have
discharged to a certain voltage or if the battery voltage has been under a certain voltage
for a predetermined time. The disconnection has to be set according to the present load
and battery manufacturer’s discharge tables or requirements.
2.3.3 Rectier Module
The fan-cooled rectier converts the AC input to -48VDC output for loads and batteries.
It is designed for parallel operation and plug-in installation in the power shelf and supplies
extremely stable DC power.
Each rectier incorporates an internal microprocessor that sends frequent updates to the
system controller and adjacent rectiers. This ensures accurately controlled load sharing
among rectiers and supplies status and identication information to the controller.
The rectier module features two LEDs for status indication, thermal protection with
power derating, and input over voltage disconnection with automatic reset. The rectier
module is hot-swappable and can be quickly removed and replaced without disrupting
the system or load.
Handles
Manual No. MS0027-MAN rev. 4
Figure 2-5 Guardian Rectier
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Chapter 3 System Safety
3.1 Safety Warnings and Guidelines
The following warnings and guidelines should be followed by properly trained and authorized
personnel when installing, operating, commissioning or maintaining this equipment.
Neglecting the instructions may be dangerous to personnel and equipment.
3.1.1 System Markings
The following markings are found on the Power System:
Ground Symbol
DC Ground Symbol
Product Label - The product label contains the system part number, model number, system
ratings and safety approvals. The label is located inside the system.
Safety Label - The safety label is located inside the system.
3.1.2 Safety Recommendations
Any device that uses electricity requires proper guidelines to ensure safety.
• The Power System should only be installed or serviced by a qualied personnel.
• Always keep tools away from walkways and aisles. Tools present a tripping hazard
in conned areas.
• Keep the system area clear and dust-free during and after the installation.
• Always know the location of emergency shut-o switches in case of an accident.
• Always wear appropriate eye protection and use appropriate tools for working with
high voltage equipment.
• Do not perform any action that creates a potential hazard to other people in the system
area.
• Never work alone in potentially hazardous conditions.
• Always check for possible hazards before beginning work.
• Remove watches, rings and jewelry that may present a hazard while working on the
power system.
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
3.1.3 Installation Warning
The following safety guidelines should be observed when transporting or moving the system:
• Before moving the Power System, read the system specications sheet to determine
whether the install site meets all the size, environmental, and power requirements.
• The system should only be moved by qualied personnel and equipment.
• The Power System should be properly mounted to the building structure at the install
location to prevent bodily injury.
• Installation of the equipment in the rack should be properly installed so that hazardous
conditions are not present due to uneven loading.
• When installing the system in a rack, allow adequate room to prevent blocking of the
vent openings on the power equipment and to allow for optimal air circulation and to
reduce the chance of system overheating.
3.1.4 Restricted Access Area Warnings
The Power System is designed for installation in locations with restricted access often secured
by a locking mechanism. It can therefore be accessed only by a trained service person, who
is fully aware of the restrictions applied to the location, or by an authority responsible for the
location.
NOTE This may be disregarded for systems delivered in a UNIPOWER Outdoor enclosure.
3.1.5 System Enclosure
Appropriate measures need to be taken to avoid intrusion of any unwanted objects or insects
into conductive areas of the power system as there is a potential risk of system damage.
Disclaimer: UNIPOWER LLC assumes no liability or responsibility for system failures
resulting from inappropriate enclosure around the system.
3.1.6 Operating Temperature Warnings
T o prevent the Power System from overheating, an automatic shutdown mechanism has been
installed. It is not recommended to continually operate the Power System in an area that
exceeds the maximum recommended operating temperature.
Manual No. MS0027-MAN rev. 4
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POWERING TECHNOLOGY
3.1.7 Electrical Safety Warnings
The following are electrical safety recommendations for working near the Power System:
WARNING Observe low voltage safety precautions before attempting to work on the
system when power is connected. Potentially lethal voltages are present within the system.
WARNING Caution must be exercised when handling system power cables. Damage to
the insulation or contact points of cables can cause contact with lethal voltages. For safety
reasons, cables should be connected to the power system before power is applied.
• Remove all metallic jewelry like watches or rings that may present a hazard while
working on the power system.
• Before connecting the AC input source to the power system, always verify voltage.
• Verify the AC source capacity. See system specications for AC information.
• All AC connections must conform to local codes and regulations, e.g. ANSI, CEC,
NEC, etc.
• When making AC connections, all AC power and DC load distribution breakers should
be in the OFF position.
• All circuit breakers should meet the original design specications of the system. In
addition, equipment connected to the system should not overload the circuit breakers
as this may have a negative eect on overcurrent protection and supply wiring, causing
system or user harm.
• Verify the DC capacity before making connections. See system specications for DC
information.
• Potentially lethal voltages are present within the system. Ensure that all power supplies
are completely isolated by turning all power switches OFF, disconnecting all relevant
connectors and removing all relevant breakers before attempting any maintenance
work. Do not rely on switches alone to isolate the power supply . Batteries should also
be disconnected.
• Potentially lethal voltages are present within this system. Ensure that low voltage
safety requirements are implemented before attempting to work on the system with
power connected.
• Potentially lethal voltages can be induced if the equipment is not grounded (earthed)
correctly. Ensure that all ground connections are secure.
Manual No. MS0027-MAN rev. 4
Page 17
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