Unipower Guardian Access User manual

Power Supply System
Guardian Access 5U/6U 19” Rack Mount
GDN.S.48.MS31
Instruction Manual
Document Number: MS0031-MAN rev. 7
UNIPOWER, LLC
65 Industrial Park Rd
Dunlap, TN 37327
Phone: [phone]
Toll Free: 1-800-440-3504
Web site: www.unipowerco.com
© 2021 UNIPOWER LLC
All Rights Reserved
POWERING TECHNOLOGY

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POWERING TECHNOLOGY
Document Number: MS0031-MAN rev. 7 guardian_access_ms31-man-rev7-0521.indd
Copyright © 1999-2021 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 https://www.unipowerco.com/contact/
RefertotheUNIPOWERLicenseAgreementinthispackagebeforeinstallingorusingthisproduct.
Unless specically 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
aliated with UNIPOWER LLC or our products. They do not sponsor or endorse our products.
LIMITATIONS AND AUTHORIZATIONS FOR USE AND PERMITTED APPLICATIONS
UNIPOWER’s products are not designed, intended for use in, or authorized for use as critical
componentsin,humanlifesupportsystems/equipment,equipmentusedinhazardousenvironments,
or equipment used in nuclear control equipment or systems. Any such use requires the prior
express written consent of an authorized executive ocer 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.
REV DESCRIPTION CHK’d & APPR’d / DATE
7 ECO # 45810 KH / 05-25-21

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POWERING TECHNOLOGY
Document Number: MS0031-MAN rev. 7 guardian_access_ms31-man-rev7-0521.indd
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
Chapter 2 System Description ......................................................................................................8
2.1 Overview.................................................................................................................................8
2.2 Principal of Operation.............................................................................................................9
2.3 System Parameters................................................................................................................10
2.4 System Components..............................................................................................................12
2.4.1 System Controller ........................................................................................................12
2.4.2 DC Distribution Unit....................................................................................................12
2.4.3 Rectier Module ..........................................................................................................13
2.4.4 Rectier Shelf ..............................................................................................................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 Warning.....................................................................................................16
3.1.4 Restricted Access Area Warnings.................................................................................16
3.1.5 System Enclosure.........................................................................................................16
3.1.6 Operating Temperature Warnings ................................................................................16
3.1.7 Recommended Power Ratings.....................................................................................16
3.1.8 Electrical Safety Warnings...........................................................................................17
3.1.9 Grounding....................................................................................................................18
3.1.10 Batteries .....................................................................................................................18
3.1.10.1 Lead Acid Batteries......................................................................................18
3.1.11 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
Chapter 4 Installation Guide ......................................................................................................21
4.1 Site Requirements.................................................................................................................21
4.2 Unpacking.............................................................................................................................21
4.3 Tools......................................................................................................................................21
4.4 Cable Size .............................................................................................................................22

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4.5 Mounting in a Cabinet / Relay Rack.....................................................................................23
4.6 Removing the Covers (Optional)..........................................................................................24
4.7 Connecting Grounding Cable ...............................................................................................24
4.8 AC Input Connection............................................................................................................25
4.9 DC Load Connection ............................................................................................................27
4.10 Battery Cable and Connection..............................................................................................28
4.11 Battery Installation................................................................................................................29
4.12 Alarm and Signal Connections .............................................................................................30
4.13 Symmetry Connection ..........................................................................................................33
4.14 Temperature Sensor Connection...........................................................................................34
4.15 Rectier Installation..............................................................................................................35
Chapter 5 Commissioning...........................................................................................................36
5.1 Commissioning Overview ....................................................................................................36
5.2 Tools and Test Equipment.....................................................................................................36
5.2.1 Tools List......................................................................................................................36
5.2.2 Test Equipment ............................................................................................................36
5.3 Preparation............................................................................................................................36
5.4 Commissioning procedure....................................................................................................37
5.5 Test of output voltage............................................................................................................38
5.5.1 Float charge (U1).........................................................................................................38
5.5.2 Adjustment of Float Charge, U1..................................................................................38
5.5.3 Boost charging (U2) (if applicable).............................................................................38
5.6 Battery supervision ...............................................................................................................39
5.7 Battery test............................................................................................................................39
5.8 Commissioning record..........................................................................................................40
Chapter 6 Maintenance & Troubleshooting..............................................................................41
6.1 Maintenance..........................................................................................................................41
6.1.1 Checking Terminal Connection ...................................................................................41
6.1.2 Other Requirements.....................................................................................................41
6.2 Troubleshooting....................................................................................................................42
Chapter 7 Replacing Modules.....................................................................................................46
7.1 Controller Replacement........................................................................................................46
7.2 Rectier Replacement...........................................................................................................46
7.3 Battery and Load Breakers Replacement..............................................................................46
7.4 Surge Protection Device Replacement..................................................................................47
Appendix A - Drawings................................................................................................................48
A.1 System Unit Layout ..............................................................................................................48
A.2 Installation Details - Connections.........................................................................................49
A.3 Block Diagram & Schematics...............................................................................................50
A.4 Detailed Dimensions.............................................................................................................53

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FIGURES
Figure 2-1 Power System Overview (6U system shown).............................................................8
Figure 2-2 Principal of Operation .................................................................................................9
Figure 2-3 Guardian Rectier .....................................................................................................13
Figure 2-4 Guardian Rectier Shelf ............................................................................................14
Figure 4-1 Mounting the Subrack (6U system shown)...............................................................23
Figure 4-2 Removing the Top Cover...........................................................................................24
Figure 4-3 Grounding Connection ..............................................................................................25
Figure 4-4 AC Input Terminal Block (1-phase)..........................................................................26
Figure 4-5 AC Input Terminal Block (2-phase)..........................................................................26
Figure 4-6 AC Input Terminal Block (3-phase)..........................................................................26
Figure 4-7 DC Load Connection.................................................................................................27
Figure 4-8 Battery Cable Connection..........................................................................................28
Figure 4-9 Battery Installation (Example only) ..........................................................................29
Figure 4-10 Alarm Interface..........................................................................................................30
Figure 4-11 ACX External Connection Board..............................................................................31
Figure 4-12 ACX Alarm Relay Board...........................................................................................32
Figure 4-13 2-block Symmetry Measurement (for illustration only)............................................33
Figure 4-14 4-Block Symmetry Measurement (for illustration only)...........................................33
Figure 4-15 Temperature Sensor Connection................................................................................34
Figure 4-16 Rectier Installation ..................................................................................................35
TABLES
Table 4-1 Recommended Electrical Cable Sizes.......................................................................22
Table 5-1 Float/Boost Charge Voltages .....................................................................................38
Table 5-2 Commissioning Record.............................................................................................40
Table 6-1 Connection Torque Setting Check.............................................................................41

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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 denes 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.
Chapter 1 About This Manual

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Table 1-1 Abbreviations
Abbreviation Description Abbreviation Description
HCX Advance Hybrid Controller Card MC Main Cabinet
ACD AC Distribution MCCB Molded Case Circuit Breaker
DC Distribution Cabinet MCB Miniature circuit breaker
EC Extension cabinet PBC Battery Cabinet
FMD Fan-cooled Modular Power Converter PBDU Battery Distribution Unit
FMP Fan-cooled Modular Power Rectier PDU Power Distribution Unit
GDN Guardian system PLD Partial load disconnection
Genset Diesel Generator SLI SLI Inverter
HCC Lite Hybrid Controller Card Lite
LVD Low voltage disconnection
1.4 Product Support
Product support can be obtained using the following addresses and telephone numbers.
Corporate oce:
UNIPOWER, LLC
210 N University Dr
Coral Springs, FL 33071
United States
Manufacturing facility:
UNIPOWER, LLC
65 Industrial Park Rd
Dunlap, TN 37327
United States
Manufacturing facility:
UNIPOWER Slovakia SRO
ZLATOVSKA 1279
Business Center 22
91105 Trencin, Slovakia
Phone: [phone]
Toll Free: 1-800-440-3504
Web site – www.unipowerco.com
When contacting UNIPOWER, please be prepared to provide:
1. The product model number, spec number, S build number, and serial number
- see the equipment nameplate on the front panel
2. Your company’s name and address
3. Your name and title
4. The reason for the contact
5. If there is a problem with product operation:
• Is the problem intermittent or continuous?
• What revision is the rmware?
• What actions were being performed prior to the appearance of the problem?
• What actions have been taken since the problem occurred?
1.5 Disclaimer
UNIPOWER is not responsible for system problems that are the result of installation or
modication of the instructions provided in this manual.

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2.1 Overview
This chapter contains an overview of the system and a short description of the units in the
system.
The Guardian system is designed to meet rigid telecom applications with very high reliability
and exibility for future expansion.
Power system unit is congurable to allow an installed capacity up to 11.6kW (5U version)
or 23.2kW (6U version) of rectiers together with DC distribution, controller, and battery
backup.
Options include battery and load disconnects, AC surge protection and DC distribution.
The Guardian access system is ideal for radio base stations, broadband nodes and core sites.
The power system can be managed locally through messages and alarms displayed on the
LCD screen of the system controller, remotely using the PC-based PowComTM software, or
through a web browser with Ethernet connection.
RECTIFIERS
CONTROLLER
BATTERY BREAKERS
ALARM INTERFACE
LOAD BREAKERS
AC INPUT TERMINAL BLOCK
AC SURGE PROTECTION
Figure 2-1 Power System Overview (6U system shown)
Chapter 2 System Description

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2.2 Principal of Operation
The power system is normally congured with N+1 redundancy, with N as the number
of rectier modules necessary for feeding the load and charging the battery and 1 as the
redundant rectier module. In normal operation the rectier 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 rectiers are shut down and the batteries feed
the load immediately. If the battery voltage drops below a preset level, the Low Voltage
Disconnection(LVD)circuitdisconnectsthebatteriesautomaticallytopreventover-discharge
of the battery to prolong battery life. When the mains input power is restored, the rectiers
will start up automatically to feed the load, close LVD circuit and recharge the batteries.
System performance is supervised and controlled by theACXAdvanced controller. 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 rectier 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.
Figure 2-2 Principal of Operation

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2.3 System Parameters
OUTPUT
Power (max) 21.4kW load + 1.8kW battery charge @ 230/400VAC nominal
13.6kW including battery recharge @ 120VAC nominal
Output Current (max) 400A load + 33.6A battery charge @ 230/400VAC nominal
254A including battery recharge @ 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 160A @ 100-120VAC, 135A @ 200-240VAC
3-phase 45A per phase @ 230/400VAC
Power factor >0.98
Surge Protection Optional
DC DISTRIBUTION & BATTERY MANAGEMENT
Battery Breakers 1 to 6 x 100A or 125A
Symmetry Inputs Up to 12
Programmable LVD / PLD 1 x 400A (voltage) / 1 x 125A or 200A (voltage/time) [optional]
Load Breakers 20, 17 or 14 x 18mm, depending on number of battery breakers
Ratings single pole - 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
MONITORING AND CONTROL
Controller ACX Advanced
Local Interface 4 x 20’ LCD, 4-key menu, USB (ACX 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)
Alarm Outputs 4 x potential free relays (C, NC, NO)
Digital Inputs 2 x, Logic 0: U<10VDC, Logic 1: U>12VDC (ACX only)
Digital Outputs 2 x, open collector type (ACX only)
Temperature measurement 2 x Temperature probe (Battery, Ambient)
CONNECTIONS
Battery connections M8 lugs, +Ve common from bus bar
AC connections Max. 4AWG/16mm2, 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

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MECHANICAL
Dimensions (WxHxD) 18.9”/481mm x 8.7”/221mm x 15.6”/396mm - 5U Without Covers
18.9”/481mm x 8.7”/221mm x 16.9”/430mm - 5U With Covers
18.9”/481mm x 10.4”/264mm x 15.6”/396mm - 6U Without Covers
18.9”/481mm x 10.4”/264mm x 16.9”/430mm - 6U With Covers
Mounting Options 19” Rack-Mounting
Cable Entry Rear
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 FMPe30.48G FMPe30.48J
E󰀩ciency (max) 95% 96.2%
Input Current (max) <17.0A <18.5A
Output Current
(53.5V oat)
60.0 @ 48V | 54.2A @ 53.5V 62.5 @ 48V | 56.1A @ 53.5V
Output Power 2900W @ >180VAC
1700W @ 90-180VAC 3000W @ >185VAC 1720W @ 90-185VAC
Operating Temperature
(without derating) 55°C 55°C
Input Voltage
(Nominal 100-240VAC) 85-300VAC
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)

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2.4 System Components
With the exception of the rectier modules the Guardian Access system is delivered with
all components mounted according to the ordered conguration. The main components are
described below and in later chapters of this manual.
2.4.1 System Controller
The Guardian power system can be controlled by the ACX Advanced controller. The
description and operation of these controllers is covered in separate manuals which are
available at:
ACX Advanced: https://www.unipowerco.com/pdf/acx-man.pdf
2.4.2 DC Distribution Unit
The distribution unit includes congurable 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
rectier output voltage.
The distribution module has common “+Ve” with load breakers in “-Ve” leg. For more
information see schematic drawing in Appendix A - Drawings.
2.4.2.1 Low Voltage Disconnect (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.

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If disconnection occurs, the batteries will be reconnected when mains supply returns.
2.3.2.2 Partial Load Disconnection / Load Shedding (PLD)
Partial load disconnection can be congured 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.
2.4.3 Rectier Module
The fan-cooled rectier converts the AC input to -48VDC output for loads and batteries.
Itis designed for parallel operation andplug-in installation in thepower shelf andsupplies
extremely stable DC power.
Each rectier incorporates an internal microprocessor that sends frequent updates to the
system controller and adjacent rectiers. This ensures accurately controlled load sharing
among rectiers and supplies status and identication information to the controller.
The rectier module features two LEDs for status indication, thermal protection with
power derating, and input over voltage disconnection with automatic reset. The rectier
module is hot-swappable and can be quickly removed and replaced without disrupting
the system or load.
Handles
Cooling Fans
Status LEDs
Figure 2-3 Guardian Rectier
The power system is normally congured with N+1 redundancy, with N as the number
of rectier modules necessary for feeding the load and charging the battery and 1 as the
redundant rectier module. In normal operation the rectier modules are feeding the
load and simultaneously maintaining the batteries in a fully charged state.

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2.4.4 Rectier Shelf
The rectier shelf is used for interconnecting the rectier modules. Each rectier shelf
has four module positions. Module position are numbered from the left to right as viewed
from the front.
Figure 2-4 Guardian Rectier Shelf
NOTE The rectier shelves are numbered from top to bottom. The module position is
numbered from the left to right viewed from the front.
NOTE 5U systems incorporate a single rectier shelf with a total maximum capacity of
4 rectier modules. 6U systems incorporate two rectier shelves with a total maximum
capacity of 8 rectier modules.

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Chapter 3 System Safety
3.1 Safety Warnings and Guidelines
Thefollowingwarnings and guidelines should befollowedbyproperlytrained 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 qualied personnel.
• Always keep tools away from walkways and aisles. Tools present a tripping hazard
in conned 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.

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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 specications sheet to determine
whether the install site meets all the size, environmental, and power requirements.
• The system should only be moved by qualied personnel and equipment.
• The Power System should be properly mounted to the building structure at the install
location to prevent bodily injury.
3.1.4 Restricted Access Area Warnings
ThePowerSystemisdesignedfor 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 Thismaybe disregardedforsystemsdeliveredin aUNIPOWEROutdoorenclosure.
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
To 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.
3.1.7 Recommended Power Ratings
Exceeding the following recommended power ratings may result in the system overheating.
• 46-57VDC, 400A at 45°C ambient
• 46-57VDC, 350A at 55°C ambient
• 46-57VDC, 280A at 65°C ambient

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3.1.8 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 specications for AC information.
• All AC connections must conform to local codes and regulations, e.g. ANSI, CEC,
NEC, etc.
• When makingAC connections, allAC power and DC load distribution breakers should
be in the OFF position.
• All circuit breakers should meet the original design specications of the system. In
addition, equipment connected to the system should not overload the circuit breakers
as this may have a negative eect on overcurrent protection and supply wiring, causing
system or user harm.
• Verify the DC capacity before making connections. See system specications for DC
information.
• Potentiallylethalvoltages are present within the system. Ensurethatallpowersupplies
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.

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3.1.9 Grounding
WARNING Grounding connection must be performed before operating the system.
Refer to local codes, e.g. ANSI, CEC, NEC, T1-333, ETSI 300-386-TC specifying the
connection of power system to building ground. In case of any doubt regarding the
grounding connection, please contact a person responsible for the system.
WARNING The system should be hard-wired to the incoming earth ground. A solid high
current ground connection capable of sinking the maximum system current is required.
CAUTION A conductor is connected between the ground point and the 0 VDC bus bar
on the PBDU distribution. This conductor is connected to its own earth bar and not shared
with other safety conductors.
3.1.10 Batteries
WARNING When installing or replacing batteries, there is risk of explosion if an incorrect
battery type is used.
3.1.10.1 Lead Acid Batteries
WARNING This equipment may use Lead Acid Batteries. When handling batteries,
follow the instructions included with the battery set, as the uids contained within these
batteries are known to be a health hazard. The disposal of lead acid batteries is subject to
legal requirements for hazardous waste disposal. Local guidelines should be followed for
disposal.
Ensure the following guidelines are observed when dealing with equipment that may contain
lead acid batteries:
• Any attempt to burn these batteries may result in an explosion and the generation of
toxic fumes.
• Should a lead acid battery suer damage, it must be moved into a well-ventilated area.
Contact with the corrosive uid must be avoided.
• Neutralize any acid corrosion with copious amounts of a solution of baking soda and
water, and then wipe o all traces of soda.
• If the lead acid battery is removed from the equipment, any exposed contact must be
insulated prior to disposal.
• Ensure that protective full-face shields, rubber gloves and aprons are worn and
insulated tools are used when working with the batteries. It is advised also to have
water available in case acid gets in contact with the eyes.

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3.1.11 In Case of an Accident
In the event of an accident resulting in injury:
1. Use caution and check for hazards in the area.
2. Disconnect power to the system.
3. If possible, send someone to get medical aid. If not, check the condition of the victim
and call for help.
3.2 Caution
3.2.1 Storage and Transportation
CAUTION During storage and transportation, the units must remain in their original
packages in order to avoid mechanical damage, maintain tracability, and protect the units
against electrostatic discharge.
3.2.2 Disposal
CAUTION The product should not be disposed with other wastes at the end of its working
life so as to prevent possible harm to the environment or human health from uncontrolled
waste disposal.
3.2.3 Handling Electrostatic Sensitive Devices
CAUTION An electrostatic sensitive device is an electronic component that may be
permanently damaged by the discharge of electrostatic charges encountered in routine
handling, testing and transportation.
3.2.4 Traceability
CAUTION Units are labeled with permanently attached product identication labels.
The labels are designed to be indelible throughout the life span of the equipment, unless
mistreated. Make sure that the product identication labels are present on the equipment
and are not subjected to unusual wear or mistreatment.

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3.2.5 Breakers
Maximum 45°C operating ambient:
1. Up to 32A CB maximum load must not exceed 80% of it’s rating.
2. 40A CB maximum load shall not exceed 30A.
3. 50-63A CB maximum load shall not exceed 35A.
Maximum 55°C operating ambient:
1. Up to 20A CB maximum load must not exceed 80% of it’s rating
2. 25A to 63A CB maximum load must not exceed 60% of it’s rating.
Maximum 65°C operating ambient:
1. Up to 20A CB maximum load must not exceed 80% of it’s rating
2. 25A to 63A CB maximum load must not exceed 50% of it’s rating.
CAUTION Breakers should always be replaced with the same type and rating in order to
avoid damage to system components.
3.2.6 Hot Surfaces
CAUTION Areas of the Power System may become hot. Take precautions and handle
with care to avoid bodily harm.