Emerson Liebert NXC User manual

Liebert®NXC from 10 to 20kVA
User Manual
AC Power for
Business-Critical Continuity™

Liebert NXC 10/15/20kVA
UNINTERRUPTIBLE POWER SUPPLY
USER MANUAL
10H52188UM60 - rev. 2

2 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Liebert NXC
All rights, including rights of translation, reproduction
by printing, copying or similar methods, even of parts,
are reserved.
Offenders will be liable for damages.
All rights, including rights created by patent grant or
registration of utility model or design, are reserved.
Delivery subject to availability. Right of technical
modification reserved.
Liebert NXC may differ from the one displayed on the
front cover.

User Manual 10H52188UM60 - Rev. 2 - 09/2012 3
Liebert NXC Contents
Contents
CHAPTER 1 PRODUCT INTRODUCTION.................................................................................................... 5
1.1 Features................................................................................................................................................... 5
1.2 Model Configurations .............................................................................................................................. 5
1.3 Appearance And Components ................................................................................................................. 6
1.3.1 Appearance ..................................................................................................................................... 6
1.3.2 Components.................................................................................................................................... 6
1.3.3 UPS device rear ................................................................................................................................ 8
1.4 Operating Principle .................................................................................................................................. 9
1.5 UPS State And Operation Mode.............................................................................................................. 10
1.5.1 Normal Mode................................................................................................................................. 11
1.5.2 Bypass Mode.................................................................................................................................. 11
1.5.3 Battery Mode................................................................................................................................. 11
1.5.4 ECO Mode (For Single UPS System Only) ........................................................................................ 11
1.5.5 FRC (Frequency Converter) Mode................................................................................................... 11
1.5.6 Fault State ..................................................................................................................................... 11
1.5.7 Maintenance Bypass Mode............................................................................................................. 12
CHAPTER 2 BATTERY ............................................................................................................................ 13
2.1 Brief Introduction................................................................................................................................... 13
2.2 Safety .................................................................................................................................................... 13
2.3 Battery Power Cable............................................................................................................................... 14
2.3.1 Overview ....................................................................................................................................... 14
2.3.2 Installing the Batteries ................................................................................................................... 14
2.3.3 Connecting the Batteries ............................................................................................................... 15
2.4 Battery Maintenance.............................................................................................................................. 18
2.5 Battery Recycling ................................................................................................................................... 18
CHAPTER 3 SINGLE UPS INSTALLATION AND COMMISSIONING ............................................................... 19
3.1 Unpacking Inspection ............................................................................................................................ 19
3.2 Installation Preparation.......................................................................................................................... 19
3.2.1 Location......................................................................................................................................... 20
3.2.2 Environmental Requirement .......................................................................................................... 20
3.2.3 Installation Tools............................................................................................................................ 21
3.3 External protection devices .................................................................................................................... 22
3.3.1 Rectifier And Bypass Input.............................................................................................................. 22
3.3.2 Battery Input (for external Battery)................................................................................................. 24
3.4 Connecting Power Cables ...................................................................................................................... 24
3.4.1 Connecting I/O Cables ................................................................................................................... 25
3.4.2 Connecting and Installing External Battery ..................................................................................... 30
3.5 Single UPS Commissioning..................................................................................................................... 31
3.5.1 Check Before Power-On ................................................................................................................. 31
3.5.2 Single UPS Parameters Setting ....................................................................................................... 31
3.5.3 Normal Mode Start-Up................................................................................................................... 33
3.5.4 Battery Mode Start-Up ................................................................................................................... 33
CHAPTER 4 PARALLEL UPS INSTALLATION AND COMMISSIONING ........................................................... 34
4.1 Features................................................................................................................................................. 34
4.2 Requirements ........................................................................................................................................ 34
4.3 Connecting Power Cables ...................................................................................................................... 34
4.3.1 Connecting I/O Cables ................................................................................................................... 34
4.3.2 Connecting Parallel Cables............................................................................................................. 36
4.3.3 Connecting external Battery Cables ............................................................................................... 37
4.4 Commissioning Parallel System.............................................................................................................. 39
4.4.1 Check Before Power-On ................................................................................................................. 39
4.4.2 Parallel System Parameters Setting................................................................................................ 39
4.4.3 Power-On Commissioning For Parallel System ............................................................................... 40
4.5 Installation And Commissioning For Double Bus System with common neutral ...................................... 40
4.5.1 Introduction .................................................................................................................................. 40
4.5.2 Installing External Protective Device............................................................................................... 41
4.5.3 Connecting Power Cables .............................................................................................................. 41
4.5.4 Connecting LBS Cables................................................................................................................... 41

4 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Contents Liebert NXC
4.5.5 Setting up the Double Bus System parameters............................................................................... 42
CHAPTER 5 OPERATION AND DISPLAY PANEL......................................................................................... 43
5.1 Introduction........................................................................................................................................... 43
5.1.1 LED Indicators................................................................................................................................ 43
5.1.2 Audible Alarm (Buzzer) .................................................................................................................. 43
5.1.3 Control Buttons ............................................................................................................................. 44
5.1.4 LCD And Menu Buttons .................................................................................................................. 44
5.2 LCD Screen Types................................................................................................................................... 44
5.2.1 Start Screen ................................................................................................................................... 44
5.2.2 Primary Screen............................................................................................................................... 45
5.2.3 Default Screen ............................................................................................................................... 45
5.3 Detailed Description Of Menu Items....................................................................................................... 46
5.4 Prompt Window..................................................................................................................................... 48
5.5 UPS Alarm Message List.......................................................................................................................... 48
CHAPTER 6 UPS OPERATION INSTRUCTIONS.......................................................................................... 51
6.1 UPS Start-Up .......................................................................................................................................... 51
6.2 Transfer Procedures Between Operation Modes..................................................................................... 51
6.2.1 Transfer From Normal Mode To Battery Mode................................................................................ 51
6.2.2 Transfer From Inverter Mode To Bypass Mode................................................................................ 51
6.2.3 Transfer From Bypass Mode To Inverter Mode................................................................................ 51
6.2.4 Transfer From Inverter Mode To Maintenance Bypass Mode........................................................... 51
6.2.5 Transfer From Maintenance Bypass Mode To Inverter Mode........................................................... 52
6.2.6 Operation with the external Maintenance Bypass in parallel systems.............................................. 52
6.3 UPS Complete Shutdown ....................................................................................................................... 53
6.4 EPO........................................................................................................................................................ 53
6.5 Auto Restart........................................................................................................................................... 53
6.6 UPS Reset............................................................................................................................................... 54
6.7 Language Selection................................................................................................................................ 54
6.8 Changing Current Date And Time........................................................................................................... 54
6.9 Control Password................................................................................................................................... 54
CHAPTER 7 COMMUNICATION .............................................................................................................. 55
7.1 Installing Intellislot cards........................................................................................................................ 55
7.1.1 Intellislot card Port......................................................................................................................... 55
7.2 Connection cables for dry contact port and opto-coupled port............................................................... 55
7.3 Connecting USB Communication Cables ................................................................................................ 57
CHAPTER 8 MAINTENANCE ................................................................................................................... 58
8.1 Fan Maintenance.................................................................................................................................... 58
8.2 Battery Maintenance.............................................................................................................................. 58
8.3 Cleaning UPS ......................................................................................................................................... 59
8.4 Checking UPS State................................................................................................................................ 59
8.5 Checking UPS Functions......................................................................................................................... 59
CHAPTER 9 PRODUCT SPECIFICATIONS ................................................................................................. 60
9.1 Conformity and Standards ..................................................................................................................... 60
9.2 Environmental Characteristics................................................................................................................ 60
9.3 Mechanical Characteristics..................................................................................................................... 60
9.4 Electrical Characteristics (Input Rectifier) ............................................................................................... 61
9.5 Electrical Characteristics (Intermediate DC Circuit) ................................................................................ 61
9.6 Electrical Characteristics (Inverter Output)............................................................................................. 62
9.7 Electrical Characteristics (Bypass Input).................................................................................................. 62
9.8 Efficiency, Heat Losses and Air Exchange ................................................................................................ 63
CHAPTER 10 OPTIONS .......................................................................................................................... 64
10.1 Option list............................................................................................................................................ 64
10.2 Communication Cables........................................................................................................................ 64
10.3 Battery Cabinet.................................................................................................................................... 64
10.4 Liebert NXC Input Transformer Version ................................................................................................ 65
10.5 Liebert NXC Output Transformer Version ............................................................................................. 65
APPENDIX 1 ABBREVIATIONS ................................................................................................................ 66
APPENDIX 2 INFORMATION FOR THE PROTECTION OF THE ENVIRONMENT ............................................. 67

User Manual 10H52188UM60 - Rev. 2 - 09/2012 5
Liebert NX Product Introduction
Chapter 1 Product Introduction
Liebert NXC UPS (UPS for short) is an intelligent online UPS system with sine wave output developed by Emerson Network
Power. The UPS offers reliable and high quality AC power to the precision instrument.
The UPS is suitable for supplying AC power to small scale computer centers, networks, communication systems, automatic
control systems and precision instruments.
This chapter introduces the features, model configurations, appearance and components, operating principle, UPS state and
operation mode, and specifications of the UPS.
1.1 Features
The UPS features include:
Compatible with two modes: 3-phase and single-phase outputs. The system wiring must be checked and the panel
setting must be conducted manually
Up to 4 units maybe connected in parallel, in order to form a n+1 redundant parallel system
High-frequency, double conversion topology, with high input power factor, wide input voltage range, and output
immunity to grid interference, thus suitable for use in areas with unstable mains supply
High power density
Full digital control technology based on digital signal processor (DSP) to achieve high system reliability with
self-protection and fault diagnosis functions
Intelligent battery management to extend the battery life
Operation and display panel with both LCD and LED indication to help you learn about the system operating state and
operating parameters
Capable of ECO power supply mode, which helps you save energy to the maximum extent
Flexible network management with Emerson monitoring software
Fan fault self-test and automatic recognition functions
SNMP card option, providing network communication function
Can be connected to multiple battery strings, in order to increase autonomy when in battery supply mode
1.2 Model Configurations
Three power ratings are available for Liebert NXC UPS: 10kVA, 15kVA and 20kVA.
The model configurations are shown in Table 1-1.
Table 1-1 Model configurations
Type Description
LI6010… (10kVA)
For single UPS system, for 1 + 1 parallel system and above 1 + 1 parallel system, the external battery cabinet
with larger capacity is recommended
LI6015… (15kVA)
LI6020… (20kVA)

6 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Product Introduction Liebert NXC
1.3 Appearance And Components
1.3.1 Appearance
The UPS device appearance is shown in Figure 1-1.
Front view Rear view
Figure 1-1 UPS appearance
1.3.2 Components
UPS module front panel
As shown in Figure 1-2, the UPS module front panel provides ventilation holes, operation and display panel, LED indicators, DIP
switch and battery cold start button.
Figure 1-2 UPS module front panel
Ventilation hole Operation and display panel
LED indicator
DIP switch and battery
cold start button (with
protective cover)

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Liebert NX Product Introduction
UPS module rear panel
As shown in Figure 1-3 and Figure 1-4, the UPS module rear panel provides parallel ports, Load Bus Synchronization (LBS) ports,
Intellislot cards port, dry contact ports, opto-coupled ports, USB port and ventilation holes. The SIC-SNMP card in the
Intellislot cards port is optional, it is sold separately.
Figure 1-3 UPS module rear panel
Figure 1-4 User dry contact and opto-coupled connectors
Note
Non-authorized personnel are prohibited from opening the UPS chassis cover.
Parallel port LBS port
Intelligent card
port (with
protective cover)
Dry contact port
and opto-coupled ports
USB port
Ventilation hole

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Product Introduction Liebert NXC
1.3.3 UPS device rear
As shown in Figure 1-5, the UPS comprises UPS module, Input/Output MCBs and I/O terminal block.
Figure 1-5 Rear view (terminal housing cover removed)
INPUT/OUTPUT MCBs
UPS MODULE
I/O TERMINAL BLOCK
Screw terminals M6
QS4 (UPS OUTPUT)
QS3 (MAINTENANCE BYPASS)
QS6/7 (INTERNAL BATTERY)
QS1 (PRIMARY MAINS INPUT)
QS2 (BYPASS MAINS INPUT)
FU1/FU2
Supply fuses for LIFE (AC 230V)
max. cables cross-sectional area = 2,5mm2

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Liebert NX Product Introduction
1.4 Operating Principle
The operating principle of the UPS is shown in Figure 1-6.
Figure 1-6 UPS operating principle
1. The UPS is composed of mains input (mains and bypass), I/O filter, rectifier/PFC, charger, inverter, bypass, battery, DSP
controller, System Control Power and UPS output.
2. Under normal mains supply conditions, the rectifier switches on and the charger supplies recharge power to the battery.
Before the UPS is switched on, the load is connected directly to the mains supply via the Bypass. Once the UPS has been
switched on, the mains input supplies DC power to the inverter via the rectifier/PFC section. The inverter then converts DC
power into pure sine wave AC power, and supplies AC power to the load through the electronic transfer switch.
3. If the mains supply is outside the normal operating limits, the rectifier/PFC circuit boosts the battery voltage and supplies it
to the inverter. The inverter then converts it into pure sine wave AC power, and supplies AC power to the load through the
electronic transfer switch.
4. After the mains returns to normal state, the UPS will automatically transfer from battery mode to Normal mode, the mains
supplies DC power to the inverter through the rectifier/PFC circuit, and then the electronic transfer switch supplies AC power
to the load.
Bypass input
Mains input Output
Input filter
Bypass
Inverter Output filter
Rectifier/PFC
Auxiliary
p
ower
Charger
DSP
controller
Battery

10 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Product Introduction Liebert NXC
1.5 UPS State And Operation Mode
The UPS state and operation mode include: Normal mode, Bypass mode, Battery mode, FRC (Frequency Converter) mode,
ECO mode, Fault state and Maintenance Bypass mode. The operation schematic diagrams of Normal mode, Bypass mode,
Battery mode, Maintenance Bypass mode, ECO mode and FRC mode are shown in Figure 1-7.
Figure 1-7 Operation schematic diagram
For the LED indicators introduced in this section, refer to 5.1.1.
Bypass input
Mains input
Normal mode
Output
B
yp
ass in
p
ut
Mains in
p
ut
Bypass mode
Out
p
ut
B
yp
ass in
p
ut
Mains in
p
ut
Maintenance
Bypass mode
Output
B
yp
ass in
p
ut
Mains in
p
ut Out
p
ut
ECO mode
Mains
input
Output
FRC mode
B
yp
ass in
p
ut
Mains in
p
ut
Battery mode
Out
p
ut

User Manual 10H52188UM60 - Rev. 2 - 09/2012 11
Liebert NX Product Introduction
1.5.1 Normal Mode
When the mains input is normal, the load is provided with voltage-stabilized and frequency- stabilized power by the inverter,
and meanwhile the battery is charged.
In Normal mode, the inverter indicators are on (green).
1.5.2 Bypass Mode
If the overload time-out, inverter or rectifier failure appears during the UPS operation in Normal mode, the UPS will transfer to
Bypass mode, that is, the load is powered by the bypass source, which comes directly from the mains input; if the rectifier is
normal, the internal charger will charge the battery. In Bypass mode, the inverter indicators are off.
Note
In the event of mains failure or mains voltage out of range in Bypass mode, the UPS will shut down and stop the output.
1.5.3 Battery Mode
Upon mains failure, rectifier overload or mains voltage out of range, the rectifier and internal charger will become inoperative,
and the battery will supply power to the load through the inverter. The inverter indicators are on together with buzzer
alarming, which notifies you that the UPS is in Battery mode.
Note
1. The battery has been fully charged before delivery. However, transportation and storage will inevitably cause some capacity loss.
Therefore, it is required to charge the battery for eight hours before putting the UPS into operation, so as to ensure the adequate backup
time for battery.
2. The battery cold start can also be used to start the UPS from the Battery (charged) mode upon mains failure. Therefore, the battery
power can be used independently for improving the system availability to some extent.
1.5.4 ECO Mode (For Single UPS System Only)
In ECO mode, the load is powered by bypass when the bypass voltage is normal, and the load is powered by inverter when the
bypass voltage is abnormal. ECO mode is an energy-saving operation mode. For power equipment that is immune to power
grid quality, you can use the ECO mode for power supply through bypass to reduce the power loss.
Note
1. In ECO mode, if the bypass failure or abnormal bypass voltage appears when the output is not overloaded, the UPS will transfer to
Normal mode. However, if the bypass failure or abnormal bypass voltage appears when the output is overloaded, the UPS will not transfer
to Normal mode, but shut down the bypass.
2. In ECO mode, the efficiency of the UPS is up to 98%.
1.5.5 FRC (Frequency Converter) Mode
This mode can be used for mains and load with different frequencies (60/50Hz or 50/60Hz).
1.5.6 Fault State
In Normal mode, the UPS will transfer to Bypass mode in the event of an inverter failure or UPS overtemperature. In Battery
mode (with no bypass mains), the UPS will shut down and interrupt the supply of energy to the load in the event of an inverter
failure or UPS overtemperature. In the Fault state, the fault indicators will turn on, the buzzer will keep beeping, and the
corresponding fault information will be displayed on the LCD.

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Product Introduction Liebert NXC
1.5.7 Maintenance Bypass Mode
If the maintenance and repair for UPS is needed, you can switch the load to the Maintenance Bypass through maintenance
bypass MCB (Miniature Circuit Breaker), and the power to the load is uninterrupted. The maintenance bypass Miniature Circuit
Breaker is located on the rear panel of the UPS device, and the capacity meets the requirements of total load capacities.
Note
If the UPS has a malfunctions and can not work normally, please get in touch with the nearest Emerson branch office or local service center.
It is prohibited to repaire by yourself, as the personnel injury and damage to the equipment may occur.

User Manual 10H52188UM60 - Rev. 2 - 09/2012 13
Liebert NXC Battery
Chapter 2 Battery
This chapter provides relevant information about the battery, including a short introduction, and information on battery
safety, battery power cables, battery maintenance and recycling.
2.1 Brief Introduction
The UPS battery string consists of batteries connected in series in order to supply the rated DC input voltage for the UPS
inverter. The battery backup time (that is, the time that the battery can continue to supply the load for when the mains supply
is interrupted) depends on load level and the ampere-hour capacity of the batteries. Therefore, it may be necessary to connect
several battery strings in parallel.
The NXC UPS includes a battery compartment that can accommodate the internal batteries.
In the case of UPS configurations without internal batteries, the unit must be connected to an external battery cabinet. The
external battery is fitted with a protective device that can be used to isolate the battery in the event of maintenance work. This
device is mounted inside or in close proximity to the battery cabinet.
Note
1. The external battery cabinet for the UPS can hold up to 128 12 V batteries.
2. It must be possible to disconnect the battery from the UPS when carrying out maintenance or service work. The fuse holder can be
switched on or off manually.
3. The requirements of the EC directives are satisfied when battery cabinets are used with original accessories. If alternative batteries are
used, you must ensure that the applicable EC directives are met, and declare conformity.
2.2 Safety
Take special care when working with the batteries associated with the UPS. When all the blocks are connected together, the
battery string voltage can be up to 460 Vdc. This is potentially lethal. Please follow the precautions for high voltage operation.
Only qualified personnel are allowed to install and maintain the battery. To ensure safety, the external batteries are to be
installed inside a lockable cabinet or in a purpose-designed, dedicated battery room, so that they are only accessible to
qualified maintenance personnel.
During battery maintenance, pay attention to the following items:
Ensure that the UPS is in maintenance mode.
The battery block number setting in the background software must be consistent with the actual battery block number.
The battery complete Ah setting must be done in the background software.
If the battery fuses are blown, the UPS must be repaired by authorized service personnel. The fuses must be replaced
using the same type as those that were delivered with the UPS and must be supplied by the same manufacturer.
Note
Full safety instructions concerning the use and maintenance of UPS batteries are provided in the appropriate battery manufacturers’
manuals. The battery safety information contained in this section relates to key considerations that must be taken into account during the
installation design process and might affect the design outcome depending on localized conditions.

14 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Battery Liebert NXC
Warning: Hazardous battery voltage present behind covers
1. No user-serviceable parts are located behind covers that require a tool for their removal. Only qualified service personnel are authorized
to remove such covers.
2. Before working on the copper bars connected to the external battery, please ensure they are disconnected from all power supplies.
3. Observe the following safety precautions when working on the batteries:
1) The battery must be firmly and reliably connected. After the connection is completed, all connections between the terminals and the
batteries must be calibrated. The requirements for torque specified in the instructions or user manual provided by the battery
manufacturer must be satisfied. All connections between the terminals and the batteries must be inspected and tightened at least once a
year. Failure to observe this may result in fire!
2) Inspect the battery appearance before accepting and using the battery. If there is any damage to the packaging, dirty battery terminals,
terminal erosion, rust, or cracks in the enclosures, deformation or electrolyte leakage, replace it with a new product. Failure to do so may
result in battery capacity reduction, electrolyte leakage, or fire.
3) Batteries are very heavy. Please use the proper method when moving and lifting batteries to prevent any injuries or damage to the
battery terminals. Severely damaged batteries may catch fire.
4) The battery terminals must not be subject to any force, such as the pulling force or twisting force exerted by cables. This may damage
the internal connection of the battery and severe damage may result in fires.
5) The battery must be installed and stored in a clean, cool, and dry environment. Do not install the battery in a sealed battery chamber or a
sealed room. The battery room ventilation must comply with EN50272-2001 as a minimum requirement. Failure to follow this instruction
may result in battery bulging, fire, or even injuries.
6) The battery must be kept away from heat sources such as transformers or fire sources. Do not burn the battery or set the battery on fire,
as this may result in electrolyte leakage, battery bulge, fire, or explosion.
7) Do not connect any conductor directly between the positive and negative terminals of the batteries. Remove rings, watches, necklaces,
bracelets, and other metal objects before working on the batteries and ensure that the tools (for example, wrenches) are insulated. Failure
to do so may result in battery burning, explosion, human death or injury.
8) Do not dismantle, modify, or damage the battery. This may result in a battery short circuit, electrolyte leakage, or even injury.
9) Clean the battery enclosure with a damp cloth. To avoid any static or arcing, do not use dry cloths or dusters to clean the battery. Do not
use organic solvent, such as thinner, gasoline, or volatile oil, as this may crack the battery enclosure. In the worst case scenario, this may
result in a fire.
10) The battery contains diluted sulfuric acid. In normal use, the diluted sulfuric acid is absorbed by battery the baffle and pole plates.
However, if the battery is damaged, the acid may leak from the battery. Therefore, use personal protective equipment such as goggles,
rubber gloves, and an apron when working on the battery. The diluted sulfuric acid may cause blindness if it enters the eyes and burns if it
comes into contact with the skin.
11) The battery will be affected by shorting, electrolyte dry-up, or positive-pole plate erosion at the end of its life. If it is still used in this
state, thermal runaway, bulging, or electrolyte leakage may occur. Please replace the battery before it reaches this state.
12) Before connecting or disconnecting the battery connection cables, please isolate the charging power.
13) Check if the battery has been unexpectedly earthed. If this is the case, remove the earth connection. Contact with any part of the
earthed battery may result in an electric shock.
2.3 Battery Power Cable
2.3.1 Overview
Please install and connect the batteries according to the following description and graphic representation.
2.3.2 Installing the Batteries
1. Before installation, check the batteries for signs of damage, inspect and count the accessories, and carefully read this
manual and the user manual or installation instructions provided by the battery manufacturer.
2. There must be a clearance of 10 mm between the vertical sides of the batteries to allow for the flow of air around the
batteries.
3. A sufficient amount of clearance must be maintained between the battery top and the underside of the layer above it to
facilitate battery monitoring and maintenance.
4. The batteries must be installed from the bottom layer upwards to avoid creating a high center of gravity. The battery must
be installed properly and protected from vibrations or shock.
5. An isolating device shall be fitted as close as possible to the battery in accordance with the local installation requirements.

User Manual 10H52188UM60 - Rev. 2 - 09/2012 15
Liebert NXC Battery
6. In the case of a parallel UPS system that uses a common battery bank, an additional isolating device (switch) must be
installed in the dedicated common battery connection to each individual UPS, so that system maintenance can be carried out
correctly. In any event, we advise against using common battery solutions as they reduce the reliability of the system.
7. Measure the battery voltage and calibrate the battery voltage after starting up the UPS.
2.3.3 Connecting the Batteries
1. Check that the battery fuses are not inserted. These must be fitted during commissioning, NOT during installation.
2. If the battery cabinet is installed on a raised floor or side by side with the UPS on a solid floor, the battery power cables and
other cables can enter the UPS cabinet through the base of the cabinet. The cables for connecting the UPS to the battery
cabinets are not included in the delivery. They can be provided by the manufacturer upon request. For the best interference
suppression (to reach class C2 EM) we recommend using shielded battery cables between the UPS cabinet and the battery
cabinet. The shielding must be connected to both the UPS and the battery cabinets.
3. Make the ground connections (PE).
4. When multiple battery strings are used, they must be connected in series and then in parallel. Before applying load and
commencing power-up, be sure to measure the total voltage of the battery strings and make sure that it is correct. The
negative and positive terminals of the battery must be connected to the corresponding negative and positive battery
terminals of the UPS, in accordance with the labels on the battery and the UPS. Reverse battery connection may result in
explosion, fire, damage to the battery, damage to the UPS, or personal injury.
5. After connecting the battery cables, install an insulating shroud for each terminal.
6. The bending radius of the cable is to be larger than 10D, where D is the outer diameter of the cable.
7. After connecting the cables, do not pull on the battery cables or the cable terminals.
8. Do not cross the battery cables during connection and do not tie the battery cables together.
9. To connect the cables for the internal batteries, refer to Figure 2-1 and Figure 2-2. To connect the cables for the external
batteries, refer to the "Battery Installation Manual".

16 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Battery Liebert NXC
ARRANGE THE BATTERIES AND CONNECT THEM AS ILLUSTRATED IN Figure 2-1.
Figure 2-1 Internal Battery Cable Connection
BATTERY SHELF
BATTERY 8
BATTERY 7
BATTERY 6
BATTERY 5
BATTERY 4
BATTERY 3
BATTERY 2
BATTERY 1
XBS
TOP VIEW
FRONT

User Manual 10H52188UM60 - Rev. 2 - 09/2012 17
Liebert NXC Battery
CONNECT THE BATTERY CABLES AS ILLUSTRATED IN Figure 2-2.
Figure 2-2 Internal Battery Cable Connection
For safety reasons, a female connector has been inserted on male connector of battery shelf; disconnect the female connector
in order to connect the XBS... male connector of the battery shelf to the female connector on the UPS.
N.B. The 3rd and 4th strings may also be installed in the field, during the initial installation.
BATTERY STRING 1
BATTERY STRING 2
BATTERY STRING 3
BATTERY STRING 4
XBS1
XBS2
XBS3
XBS4
XBS5
XBS6
XBS7
XBS8
XBS9
XBS10
XBS11
XBS12
XBS13
XBS14
XBS15 XBS16

18 User Manual 10H52188UM60 - Rev. 2 - 09/2012
Battery Liebert NXC
2.4 Battery Maintenance
For battery maintenance and maintenance precautions, refer to IEEE-Std-1188-2005 and the relevant manuals provided by the
battery manufacturer.
Note
1. Check that all safety devices are present and that they function correctly. Check that the battery management parameters are set
correctly.
2. Measure and record the air temperature inside the battery room.
3. Check the battery terminals for damage and heating and ensure that there is no evidence of corrosion. Check the battery enclosure and
terminal covers for damage.
2.5 Battery Recycling
If the battery leaks electrolyte, or is otherwise physically damaged, it should be placed in a container resistant to sulphuric acid
and disposed of in accordance with local regulations.
Disused lead-acid storage batteries are classified as dangerous waste and are critical elements in disused battery pollution
control. Storage, transportation, use, and disposal of batteries must comply with the national and local laws and regulations
on dangerous waste, disused battery pollution prevention, and other standards.
In accordance with the relevant national regulations, disused lead-acid storage batteries must be recycled and must not be
disposed of by other methods. Illegal dumping or any other improper disposal of disused lead-acid storage batteries may
cause severe environmental pollution and those responsible may be liable for prosecution.
As a lead-acid storage battery supplier, Emerson has created an excellent service network and disused battery recycling
system to help customers dispose of lead-acid storage batteries legally and properly. For detailed information about Emerson's
disused battery recycling system, please consult the local customer service center or Emerson sales office. If the customer
disregards these instructions or does not use Emerson's disused battery recycling system, Emerson cannot be held responsible
for any environmental consequences of the failure to dispose of disused battery products correctly.

User Manual 10H52188UM60 - Rev. 2 - 09/2012 19
Liebert NXC Single UPS Installation And Commissioning
Chapter 3 Single UPS Installation And Commissioning
This chapter describes the installation, cable connection and commissioning of the single UPS.
Each site has its peculiarity, so this chapter provides the guidance with general installation procedures and methods for the
installation engineer, who should conduct the installation according to the actual conditions.
Warning: professional installation
The UPS should be installed by a qualified engineer according to the information contained in this chapter. If any problem is found, please
get in touch with Emerson local service center immediately.
The UPS shall not be powered on without approval of the commissioning engineer.
For other equipments which are not introduced in this manual, the detailed information about mechanical installation and electrical
installation are delivered with the equipment.
Note: 3-phase 5-line for power input
The UPS can be connected to 3-phase 5-line (L1, L2, L3, N, PE) TN and TT AC power distribution system (IEC/EN 60364-3).
3.1 Unpacking Inspection
After the UPS arrival, you should unpack it and check the following items:
1. Visually inspect the UPS appearance for transportation damage. If any problem is found, please notify the carrier
immediately.
2. Check the accessories and models against the below delivery list. If any problem is found, please notify the dealer
immediately.
Safety manual
User manual
Test bulletin
Insulating material (28010935)
Copper busbar kit (21500904)
1x connector 3 PIN pitch 3,81mm (14120115)
3x connector 2 PIN pitch 3,81mm (14120116)
7x lugs (1417230))
3.2 Installation Preparation
Prior to transportation, make sure of the height of any doors are sufficient and
there not other obstacles standing in the passage of the UPS. Refer to the following
for dismantling of machine cabinet.
Remove outer packaging and side supporting plates first.
Place dismantled wooden cover in front of the pallet, and then fix the wooden cover to the pallet with the hook provided, so
as to form a ramp, push UPS down the ramp.
Routine maintenance operations may involve removal of front and rear panels. Space must be provided to permit the unit to
be rolled back and forward.
Always install the Stabilizing Brackets to enhance the stabilizing of the UPS. If the UPS needs to be moved after Stabilizing
Brackets have been attached, the Brackets must be removed.
To remove the Stabilizing Brackets, unscrew all the nuts and bolts holding it in place and slide it out from under the UPS.
When the UPS has reached its new position, push the Brackets into its down position again, and tighten the screws.