Huawei UPS5000-A-500 kVA User manual

UPS5000-A-500 kVA
User Manual (e-shelter)
Issue
02
Date
2020-01-10
HUAWEI TECHNOLOGIES CO., LTD.

Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
i
Copyright © Huawei Technologies Co., Ltd. 2020. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
https://e.huawei.com

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About This Document
Purpose
This document describes the UPS5000-A-500 kVAin terms of its features, performance,
working principles, appearance as well as instructions for installation, and operation and
maintenance (O&M).
Intended Audience
This document is intended for:
Sales engineers
Technical support engineers
System engineers
Hardware installation engineers
Commissioning engineers
Data configuration engineers
Maintenance engineers
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol
Description
Indicates a hazard with a high level of risk which, if not
avoided, will result in death or serious injury.
Indicates a hazard with a medium level of risk which, if
not avoided, could result in death or serious injury.
Indicates a hazard with a low level of risk which, if not
avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation which, if not
avoided, could result in equipment damage, data loss,
performance deterioration, or unanticipated results.
NOTICE is used to address practices not related to
personal injury.

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Symbol
Description
Supplements the important information in the main text.
NOTE is used to address information not related to
personal injury, equipment damage, and environment
deterioration.
Change History
Changes between document issues are cumulative. The latest document issue contains all the
changes made in earlier issues.
Issue 02 (2020-01-10)
Added SNMP descriptions to the sections about site configuration.
Added the SNMPV1 and V2 protocol description.
Updated the safety information.
Issue 01 (2019-02-25)
This issue is the first official release.

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Contents
About This Document ............................................................................................................... ii
1 Safety Information ................................................................................................................... 1
1.1 General Safety....................................................................................................................................................... 1
1.2 Personnel Requirements ........................................................................................................................................ 4
1.3 Electrical Safety.................................................................................................................................................... 4
1.4 Installation Environment Requirements.................................................................................................................. 6
1.5 Mechanical Safety................................................................................................................................................. 7
1.6 Device Running Safety.........................................................................................................................................10
1.7 Battery Safety.......................................................................................................................................................11
1.8 Others ..................................................................................................................................................................14
2 Overview ................................................................................................................................. 15
2.1 Model Description................................................................................................................................................15
2.2 Working Principles...............................................................................................................................................15
2.2.1 Conceptual Diagram..........................................................................................................................................16
2.2.2 Working Modes .................................................................................................................................................16
2.2.2.1 Normal Mode .................................................................................................................................................16
2.2.2.2 Bypass Mode..................................................................................................................................................17
2.2.2.3 Battery Mode..................................................................................................................................................18
2.2.2.4 Maintenance Bypass Mode .............................................................................................................................18
2.2.2.5 ECO Mode .....................................................................................................................................................19
2.3 Product Structure..................................................................................................................................................19
2.4 Control Unit.........................................................................................................................................................20
2.4.1 Overview...........................................................................................................................................................20
2.4.2 ECM .................................................................................................................................................................21
2.4.3 Dry contact card ................................................................................................................................................22
2.4.4 Monitoring interface card...................................................................................................................................24
2.5 MDU....................................................................................................................................................................29
2.6 Optional Components...........................................................................................................................................31
3 Installation .............................................................................................................................. 33
3.1 Installation Preparations .......................................................................................................................................33
3.1.1 Site....................................................................................................................................................................33
3.1.1.1 UPS Dimensions.............................................................................................................................................33

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3.1.1.2 Installation Environment.................................................................................................................................34
3.1.1.3 Installation Clearances....................................................................................................................................34
3.1.2 Tools and Instruments........................................................................................................................................35
3.1.3 Preparing Power Cables.....................................................................................................................................36
3.1.4 Unpacking.........................................................................................................................................................39
3.1.5 (Optional) Splitting the Power Cabinet and Bypass Cabinet................................................................................40
3.1.6 (Optional) Combining the Power Cabinet and Bypass Cabinet............................................................................45
3.2 Installing the UPS Cabinet....................................................................................................................................46
3.2.1 Installing the UPS on the Ground.......................................................................................................................46
3.2.2 Installing the UPS on Channel Steel...................................................................................................................49
3.3 Installing Batteries................................................................................................................................................50
3.4 Installing Optional Components............................................................................................................................50
3.4.1 Installing an IP21 Component............................................................................................................................50
3.4.2 Connecting an Ambient T/H Sensor ...................................................................................................................51
3.4.3 Connecting the BCB Box...................................................................................................................................52
3.4.4 Installing a Battery Grounding Failure Detector..................................................................................................52
3.5 UPS Cable Connection Reference.........................................................................................................................53
3.6 Routing Cables.....................................................................................................................................................54
3.6.1 Top Cable Routing.............................................................................................................................................55
3.6.2 Bottom Cable Routing .......................................................................................................................................63
3.7 Remote EPO.........................................................................................................................................................71
3.8 Connecting Communications Cables.....................................................................................................................73
3.9 Installing a Lock...................................................................................................................................................73
3.10 Installation Verification.......................................................................................................................................73
4 User Interface.......................................................................................................................... 76
4.1 LCD Interface ......................................................................................................................................................76
4.1.1 Main Menu........................................................................................................................................................76
4.1.2 System Info Screen............................................................................................................................................77
4.1.2.1 Running..........................................................................................................................................................78
4.1.2.2 Alarms Screen.................................................................................................................................................81
4.1.2.3 Settings Screen ...............................................................................................................................................82
4.1.2.4 Maintenance.................................................................................................................................................110
4.1.2.5 About Screen ................................................................................................................................................113
4.1.3 System Status..................................................................................................................................................113
4.1.4 Common Functions..........................................................................................................................................114
4.2 WebUI................................................................................................................................................................115
4.2.1 Login...............................................................................................................................................................115
4.2.2 Monitoring Page..............................................................................................................................................117
4.2.2.1 Param. Settings Page.....................................................................................................................................117
4.2.2.2 Comm. Config. Page.....................................................................................................................................118
4.2.2.3 Control Page.................................................................................................................................................119

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4.2.3 Query..............................................................................................................................................................119
4.2.3.1 Historical Alarms..........................................................................................................................................119
4.2.3.2 Logs.............................................................................................................................................................119
4.2.4 Config. Page....................................................................................................................................................120
4.2.4.1 User Management.........................................................................................................................................120
4.2.4.2 Site Config. ..................................................................................................................................................120
4.2.4.3 RCCMD.......................................................................................................................................................122
4.2.4.4 Managing the UPS by Using the NMS Complying with RFC1628 Standard...................................................130
4.2.5 Protecting the Server by Using the RCCMD Software......................................................................................132
4.2.5.1 Introduction to the Software..........................................................................................................................132
4.2.5.2 RCCMD Event Shutdown and Message Sending...........................................................................................132
4.2.5.3 UPS Alive Check Function............................................................................................................................133
5 Operations............................................................................................................................. 136
5.1 Powering On and Starting the UPS .....................................................................................................................136
5.1.1 Powering On the UPS......................................................................................................................................136
5.1.2 Starting the Inverter.........................................................................................................................................136
5.1.2.1 Initial Startup................................................................................................................................................137
5.1.2.2 Non-initial Startup........................................................................................................................................143
5.1.3 Powering On Loads .........................................................................................................................................145
5.1.4 (Optional) Setting Parameters for the BCB Box................................................................................................145
5.2 Shutting Down and Powering Off the UPS..........................................................................................................146
5.3 Starting the UPS in Battery Mode .......................................................................................................................148
5.4 Transferring to Bypass Mode..............................................................................................................................148
5.5 Setting ECO Mode .............................................................................................................................................148
5.6 Testing Batteries.................................................................................................................................................150
5.6.1 Forced Equalized Charging Test.......................................................................................................................150
5.6.2 Shallow Discharge Test....................................................................................................................................151
5.6.3 Capacity Test...................................................................................................................................................152
5.6.4 Test Data Download.........................................................................................................................................153
5.7 Transferring to Maintenance Bypass Mode..........................................................................................................154
5.8 Transferring from Maintenance Bypass Mode to Normal Mode...........................................................................154
5.9 Performing EPO.................................................................................................................................................155
5.10 Clearing the EPO State .....................................................................................................................................155
5.11 Exporting Data .................................................................................................................................................156
6 Routine Maintenance........................................................................................................... 157
6.1 UPS Maintenance...............................................................................................................................................157
6.1.1 Monthly Maintenance......................................................................................................................................157
6.1.2 Quarterly Maintenance.....................................................................................................................................158
6.1.3 Annual Maintenance........................................................................................................................................158
6.2 Battery Maintenance...........................................................................................................................................159
6.2.1 Precautions for Battery Maintenance................................................................................................................160

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6.2.2 Monthly Maintenance......................................................................................................................................160
6.2.3 Quarterly Maintenance.....................................................................................................................................161
6.2.4 Annual Maintenance........................................................................................................................................162
7 Troubleshooting................................................................................................................... 163
8 Technical Specifications...................................................................................................... 165
A Alarm List............................................................................................................................. 169
B Acronyms and Abbreviations ............................................................................................ 178

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1 Safety Information
1.1 General Safety
Statement
Before installing, operating, and maintaining the equipment, read this document and observe
all the safety instructions on the equipment and in this document.
The "NOTICE", "CAUTION", "WARNING", and "DANGER" statements in this document
do not cover all the safety instructions. They are only supplements to the safety instructions.
Huawei will not be liable for any consequence caused by the violation of general safety
requirements or design, production, and usage safety standards.
Ensure that the equipment is used in environments that meet its design specifications.
Otherwise, the equipment may become faulty, and the resulting equipment malfunction,
component damage, personal injuries, or property damage are not covered under the warranty.
Follow local laws and regulations when installing, operating, or maintaining the equipment.
The safety instructions in this document are only supplements to local laws and regulations.
Huawei will not be liable for any consequences of the following circumstances:
Operation beyond the conditions specified in this document
Installation or use in environments which are not specified in relevant international or
national standards
Unauthorized modifications to the product or software code or removal of the product
Failure to follow the operation instructions and safety precautions on the product and in
this document
Equipment damage due to force majeure, such as earthquakes, fire, and storms
Damage caused during transportation by the customer
Storage conditions that do not meet the requirements specified in this document
General Requirements
Do not install, use, or operate outdoor equipment and cables (including but not limited to
moving equipment, operating equipment and cables, inserting connectors to or removing
connectors from signal ports connected to outdoor facilities, working at heights, and
performing outdoor installation) in harsh weather conditions such as lightning, rain,
snow, and level 6 or stronger wind.

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Before installing, operating, or maintaining the equipment, remove any conductive
objects such as watches or metal jewelry like bracelets, bangles, and rings to avoid
electric shock.
When installing, operating, or maintaining the equipment, wear dedicated protective
gears such as insulation gloves, goggles, and safety clothing, helmet, and shoes, as
shown in the following figure.
Follow the specified procedures for installation, operation, and maintenance.
Before handling a conductor surface or terminal, measure the contact point voltage and
ensure that there is no risk of electric shock.
After installing the equipment, remove idle packing materials such as cartons, foam,
plastics, and cable ties from the equipment area.
In the case of a fire, immediately leave the building or the equipment area, and turn on
the fire alarm bell or make an emergency call. Do not enter the building on fire in any
case.
Do not stop using protective devices. Pay attention to the warnings, cautions, and related
precautionary measures in this document and on the equipment. Promptly replace
warning labels that have worn out.
Keep irrelevant people away from the equipment. Only operators are allowed to access
the equipment.
Use insulated tools or tools with insulated handles, as shown in the following figure.

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All cable holes should be sealed. Seal the used cable holes with firestop putty. Seal the
unused cable holes with the caps delivered with the cabinet. The following figure shows
the criteria for correct sealing with firestop putty.
Do not scrawl, damage, or block any warning label on the equipment.
Tighten the screws using tools when installing the equipment.
Do not work with power on during installation.
Repaint any paint scratches caused during equipment transportation or installation in a
timely manner. Equipment with scratches cannot be exposed to an outdoor environment
for a long period of time.
Before operations, ensure that the equipment is firmly secured to the floor or other solid
objects, such as a wall or an installation rack.
Do not use water to clean electrical components inside or outside of a cabinet.
Do not change the structure or installation sequence of equipment without permission.
Do not touch a running fan with your fingers, components, screws, tools, or boards
before the fan is powered off or stops running.
Personal Safety
If there is a probability of personal injury or equipment damage during operations on the
equipment, immediately stop the operations, report the case to the supervisor, and take
feasible protective measures.
To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to
telecommunication network voltage (TNV) circuits.

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Do not power on the equipment before it is installed or confirmed by professionals.
1.2 Personnel Requirements
Personnel who plan to install or maintain Huawei equipment must receive thorough
training, understand all necessary safety precautions, and be able to correctly perform all
operations.
Only qualified professionals or trained personnel are allowed to install, operate, and
maintain the equipment.
Only qualified professionals are allowed to remove safety facilities and inspect the
equipment.
Personnel who will operate the equipment, including operators, trained personnel, and
professionals, should possess the local national required qualifications in special
operations such as high-voltage operations, working at heights, and operations of special
equipment.
Professionals: personnel who are trained or experienced in equipment operations and are
clear of the sources and degree of various potential hazards in equipment installation,
operation, maintenance
Trained personnel: personnel who are technically trained, have required experience, are
aware of possible hazards on themselves in certain operations, and are able to take
protective measures to minimize the hazards on themselves and other people
Operators: operation personnel who may come in contact with the equipment, except
trained personnel and professionals
Only professionals or authorized personnel are allowed to replace the equipment or
components (including software).
1.3 Electrical Safety
Grounding
For the equipment that needs to be grounded, install the ground cable first when
installing the equipment and remove the ground cable last when removing the
equipment.
Do not damage the ground conductor.
Do not operate the equipment in the absence of a properly installed ground conductor.
Ensure that the equipment is connected permanently to the protective ground. Before
operating the equipment, check its electrical connection to ensure that it is securely
grounded.
General Requirements
Use dedicated insulated tools when performing high-voltage operations.
AC and DC Power

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Do not connect or disconnect power cables with power on. Transient contact between the core
of the power cable and the conductor will generate electric arcs or sparks, which may cause
fire or personal injury.
If a "high electricity leakage" tag is attached on the equipment, ground the protective
ground terminal on the equipment enclosure before connecting the AC power supply;
otherwise, electric shock as a result of electricity leakage may occur.
Before installing or removing a power cable, turn off the power switch.
Before connecting a power cable, check that the label on the power cable is correct.
If the equipment has multiple inputs, disconnect all the inputs before operating the
equipment.
A circuit breaker equipped with a residual current device (RCD) is not recommended.
A damaged power cable must be replaced by the manufacturer, service agent, or
professionals to avoid risks.
High voltage operations and installation of AC-powered facilities must be performed by
qualified personnel.
Cabling
When routing cables, ensure that a distance of at least 30 mm exists between the cables
and heat-generating components or areas. This prevents damage to the insulation layer of
the cables.
Do not route cables behind the air intake and exhaust vents of the equipment.
Ensure that cables meet the VW-1 flame spread rating requirements.
Bind cables of the same type together. When routing cables of different types, ensure that
they are at least 30 mm away from each other.
If anAC input power cable is connected to the cabinet from the top, bend the cable in a
U shape outside the cabinet and then route it into the cabinet.
When the temperature is low, violent impact or vibration may damage the plastic cable
sheathing. To ensure safety, comply with the following requirements:
Cables can be laid or installed only when the temperature is higher than 0°C. Handle
cables with caution, especially at a low temperature.
Cables stored at subzero temperatures must be stored at room temperature for at least 24
hours before they are laid out.
Do not perform any improper operations, for example, dropping cables directly from a
vehicle.
When selecting, connecting, and routing cables, follow local safety regulations and rules.
ESD
The static electricity generated by human bodies may damage the electrostatic-sensitive
components on boards, for example, the large-scale integrated (LSI) circuits.

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Wear ESD gloves or a well-grounded ESD wrist strap when touching the device or
handling boards or application-specific integrated circuits (ASICs).
When holding a board, hold its edge without touching any components. Do not touch the
components with your bare hands.
Package boards with ESD packaging materials before storing or transporting them.
Figure 1-1 Wearingan ESD wrist strap
Neutral-Ground Voltage
It is recommended that the three-phase loads be equalized and the neutral-ground voltage be
kept at less than 2 V to meet power distribution requirements.
1.4 Installation Environment Requirements
To prevent fire due to high temperature, ensure that the ventilation vents or heat
dissipation system are not blocked when the equipment is running.
Install the equipment in an area far away from liquids. Do not install it under areas prone
to condensation, such as under water pipes and air exhaust vents, or areas prone to water
leakage, such as air conditioner vents, ventilation vents, or feeder windows of the
equipment room. Ensure that no liquid enters the equipment to prevent faults or short
circuits.
If any liquid is detected inside the equipment, immediately disconnect the power supply
and contact the administrator.
Do not expose the equipment to flammable or explosive gas or smoke. Do not perform
any operation on the equipment in such environments.
Ensure that the equipment room provides good heat insulation, and the walls and floor
are dampproof.
Install a rat guard at the door of the equipment room.

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Installation at Heights
Working at heights refers to operations that are performed at least 2 meters above the
ground.
Do not work at heights if the steel pipes are wet or other potential danger exists. After the
preceding conditions no longer exist, the safety director and relevant technical personnel
need to check the involved equipment. Operators can begin working only after obtaining
consent.
When working at heights, comply with local relevant laws and regulations.
Only trained and qualified personnel are allowed to work at heights.
Before working at heights, check the climbing tools and safety gears such as safety
helmets, safety belts, ladders, springboards, scaffolding, and lifting equipment. If they do
not meet the requirements, take corrective measures or disallow working at heights.
Wear personal protective equipment such as the safety helmet and safety belt or waist
rope and fasten it to a solid structure. Do not mount it on an insecure moveable object or
metal object with sharp edges. Make sure that the hooks will not slide off.
Set a restricted area and eye-catching signs for working at heights to warn away
irrelevant personnel.
Carry the operation machinery and tools properly to prevent them from falling off and
causing injuries.
Personnel involving working at heights are not allowed to throw objects from the height
to the ground, or vice versa. Objects should be transported by tough slings, hanging
baskets, highline trolleys, or cranes.
Ensure that guard rails and warning signs are set at the edges and openings of the area
involving working at heights to prevent falls.
Do not pile up scaffolding, springboards, or other sundries on the ground under the area
involving working at heights. Do not allow people to stay or pass under the area
involving working at heights.
Inspect the scaffolding, springboards, and workbenches used for working at heights in
advance to ensure that their structures are solid and not overloaded.
Any violations must be promptly pointed out by the site manager or safety supervisor
and the involved personnel should be prompted for correction. Personnel who fail to stop
violations will be forbidden from working.
1.5 Mechanical Safety
Hoisting Devices
Do not walk under hoisted objects.
Only trained and qualified personnel should perform hoisting operations.
Check that hoisting tools are available and in good condition.
Before hoisting objects, ensure that hoisting tools are firmly secured onto a load-bearing
object or wall.
Ensure that the angle formed by two hoisting cables is no more than 90 degrees, as
shown in the following figure.

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Do not drag steel ropes and hoisting tools or bump hoisted objects against hard objects
during hoisting.
Using Ladders
Use wooden or fiberglass ladders when you need to perform live working at heights.
When a step ladder is used, ensure that the pull ropes are secured and the ladder is held
firm.
Before using a ladder, check that it is intact and confirm its load bearing capacity. Do not
overload it.
Ensure that the ladder is securely positioned. The recommended angle for a ladder
against the floor is 75 degrees, as shown in the following figure. An angle rule can be
used to measure the angle. Ensure that the wider end of the ladder is at the bottom, or
protective measures have been taken at the bottom to prevent the ladder from sliding.
When climbing a ladder, take the following precautions to reduce risks and ensure
safety:
Keep your body steady.
Do not climb higher than the fourth rung of the ladder from the top.
Ensure that your body's center of gravity does not shift outside the legs of the ladder.

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Drilling Holes
When drilling holes into a wall or floor, observe the following safety precautions:
Do not drill holes into the equipment. Doing so may affect the electromagnetic shielding of
the equipment and damage components or cables inside. Metal shavings from drilling may
short-circuit boards inside the equipment.
Obtain the consent from the customer, subcontractor, and Huawei before drilling.
Wear goggles and protective gloves when drilling holes.
When drilling holes, protect the equipment from shavings. After drilling, clean up any
shavings that have accumulated inside or outside the equipment.
Moving Heavy Objects
When removing a heavy or unstable component from a cabinet, be aware of unstable or heavy
objects on the cabinet.
Be cautious to avoid injury when moving heavy objects.
When moving the equipment by hand, wear protective gloves to prevent injuries.
Move or lift the equipment by holding its handles or lower edges. Do not hold the
handles of modules (such as power supply units, fans, and boards) that are installed in
the equipment because they cannot support the weight of the equipment.
Avoid scratching the cabinet surface or damaging cabinet components and cables during
equipment transportation.
When transporting the equipment using a forklift truck, ensure that the forks are properly
positioned to ensure that the equipment does not topple. Before moving the equipment,
secure it to the forklift truck using ropes. When moving the equipment, assign dedicated
personnel to take care of it.
Choose railways, sea, or a road with good condition for transportation to ensure
equipment safety. Avoid tilt or jolt during transportation.
Move a cabinet with caution. Any bumping or falling may damage the equipment.

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1.6 Device Running Safety
The UPS is used for commercial and industrial purposes only. It cannot be used as a power
supply for life support devices.
For power supply systems that are critical to significant economic interests or public order,
such as the national computing center, military command system, emergency command
center, railway signal system and control center, civil aviation and air traffic control center,
airport command center, financial clearing center, and transaction center, the Tier 4 or 3 power
architecture specified in TIA-942 must be used. That is, two power supplies must be used to
supply power to loads.
Ensure that the equipment is used in an environment that meets the product design
specifications (including power grid, temperature, and humidity). Otherwise, the equipment
may become faulty, and the resulting equipment malfunction and component damage are not
covered under the warranty.
The UPS operating environment must meet the requirements for the climate indicator,
mechanically active substance indicator, and chemically active substance indicator in ETSI
EN 300 019-1 class 3.6.
After unpacking the UPS, you are advised to power on the UPS as soon as possible. If you
temporarily do not use the UPS, take appropriate measures to prevent moisture, dust, and
foreign matter from entering the UPS.
After unpacking batteries, you are advised to connect the battery supply as soon as
possible. If you temporarily do not use the batteries, store them in a dry and clean
environment. If batteries are stored for more than 90 days, charge them in time. Otherwise,
the battery lifespan may be affected.
Install the UPS in an area far away from liquids. Do not install it under areas prone to
water leakage, such as air conditioner vents, ventilation vents, or feeder windows of the
equipment room. Ensure that no liquid enters the UPS to prevent short circuits. Ensure that
there is no condensation inside the equipment or equipment room.
If any liquid is detected inside the equipment, immediately disconnect the power supply
and contact the administrator.
Do not expose the equipment to flammable or explosive gas or smoke. Do not perform any
operation on the equipment in such environments.
During installation and maintenance, ensure that sundries do not enter the UPS. Otherwise,
equipment damage, load power derating, power failure, and personal injury may occur.
If the valid mains voltage exceeds 320 VAC, the UPS may be damaged.
A UPS can be used to serve resistive-capacitive loads, resistive loads, and micro-inductive
loads. It is recommended that a UPS not be used for pure capacitive loads, pure inductive
loads, and half-wave rectification loads. AUPS does not apply to regeneration loads.

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Any operation on any electrical device in an environment that has inflammable air can cause
extreme danger. Strictly obey the operating environmental requirements specified in related
user manuals when using or storing the device.
The UPS can be configured with a backfeed protection dry contact to work with an external
automatic circuit breaker, preventing the voltage from flowing back to input terminals over
static bypass circuits. If the installation and maintenance personnel do not need backfeed
protection, paste labels on external mains and bypass input switches, informing that the UPS
is connected to a backfeed protection card. Disconnect the backfeed protection card from the
UPS before operating the UPS.
Do not use the UPS in the following places:
Environments that are close to flammable or explosive materials, dust, corrosive gases or
dust, conductive or magnetic dust, abnormal vibration, or collision
Rooms or outdoor environments where temperature and humidity are not controlled
(with high temperature, low temperature, moisture, direct sunlight, or heat sources)
Non-confined environments near the ocean (0–3.7 km) and indoor or semi-indoor
environments where the temperature and humidity are not controllable, such as simple
equipment rooms, civil houses, garages, corridors, and direct ventilation cabinets near
the sea; or houses with only roofs, railway station platforms, gymnasiums, and
aquariums
Environments that are conducive for the growth of microorganisms such as fungus or
mildew
Environments where rodents (such as mice) and insects exist
1.7 Battery Safety
Basic Requirements
Before operating batteries, carefully read the safety precautions for battery handling and
master the correct battery connection methods.
Do not expose batteries at high temperatures or around heat-generating devices, such as
sunlight, fire sources, transformers, and heaters. Excessive heat exposure may cause the
batteries to explode.
Do not burn batteries. Otherwise, the batteries may explode.
To avoid leakage, overheating, fire, or explosions, do not disassemble, alter, or damage
batteries, for example, insert sundries into batteries or immerse batteries in water or other
liquids.
Wear goggles, rubber gloves, and protective clothing to prevent skin contact with
electrolyte in the case of electrolyte overflow. If a battery leaks, protect the skin or eyes
from the leaking liquid. If the skin or eyes come in contact with the leaking liquid, wash
it immediately with clean water and go to the hospital for medical treatment.
Use dedicated insulated tools.
Move batteries in the required direction. Do not place a battery upside down or tilt it.

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Keep the battery loop disconnected during installation and maintenance.
Use batteries of specified models. Using batteries of other models may damage the
batteries.
Dispose of waste batteries in accordance with local laws and regulations. Do not dispose
of batteries as household waste. If a battery is disposed of improperly, it may explode.
The site must be equipped with qualified fire extinguishing facilities, such as firefighting
sands and powder fire extinguishers.
To ensure battery safety and battery management accuracy, use batteries provided with the
UPS by Huawei. Huawei is not responsible for any battery faults caused by batteries not
provided by Huawei.
Battery Installation
Before installing batteries, observe the following safety precautions:
Install batteries in a well-ventilated, dry, and cool environment that is far away from heat
sources, flammable materials, moistures, extensive infrared radiation, organic solvents,
and corrosive gases. Take fire prevention measures.
Place and secure batteries horizontally.
Note the polarities when installing batteries. Do not short-circuit the positive and
negative poles of the same battery or battery string. Otherwise, the battery may be short-
circuited.
Check battery connections periodically, ensuring that all bolts are securely tightened.
When installing batteries, do not place installation tools on the batteries.
Battery Short Circuit
Battery short circuits can generate high instantaneous current and release a great amount of
energy, which may cause equipment damage or personal injury.
To avoid battery short-circuit, do not maintain batteries with power on.
Flammable Gas