Liebert GXT2 - 3X1 User manual

GXT2 - 3X1 Intelligent, High
Frequency, Online UPS
10/15/20kVA USER MANUAL
E1-20010329-C-1.0
Liebert Corporation

IMPORTANT INSTRUCTIONS FOR SAFE USE
The UPS must be commissioned by a Liebert - approved engineer
before it is put into service. Failure to observe this condition will
invalidate any implied warranty .
Do not apply power to this equipment before it has been
commissioned by a Liebert - approved engineer. He will validate
the installation work and install ' site information ' into the
micro-controller memory. This information is required to
substantiate any warranty claims that might be made.
If you find any problems with the procedures in this manual, seek
immediate assistance from the Liebert distributor or agent from
whom you purchased the equipment.
Do not attempt to service this product yourself .It contains no user
serviceable parts. All servicing must be referred to qualified
personnel.
Qualified personnel should be consulted if liquid spills into the
product.
The UPS is for indoor use only.
It must be protected from rain or excessive moisture and installed
in clean environment , free from flammable liquids, gasses , or
corrosive substances. Do not put drinks, plants, or any other
containers holding liquids, on top of the unit.
Ventilation grills are provided beneath and at the rear of the
cabinet. Do not block or cover these openings otherwise
overheating may occur and UPS operation become unreliable.
Never poke anything through the ventilation holes or openings.

Do not place magnetic storage media on top of the unit as it can
corrupt the data stored on them.
Electromagnetic Compatibility
WARNING
This is a Class A UPS product. In a domestic environment this
product may cause radio interference, in which case the user
may be required to take additional measures.
Limits on use:
WARNING
This UPS should not be supplied from electrical power
systems of the 'IT' (Impedance a Terre ) type.
(IEC 364-ELECTRICAL INSTALLATION OF
BUILDINGS)

Content
Chapter 1 Introduction 1
1.1 Application 1
1.3 System Function Block 1
1.4 Features 2
Chapter 2 Installation 5
2.1 Unpacking Inspection 5
2.2 Outline and Panel Description 5
2.2.1 Outline 5
2.2.2 Front Panel 7
2.2.3 Rear Panel 8
2.3 Installation 8
2.3.1 Important Note 8
2.3.2 Installation Procedure 10
2.4 Connection of External Batteries 13
Chapter 3 Operation 17
3.1 Operating Mode 17
3.1.1 Normal Mode 17
3.1.2 Bypass Mode 18
3.1.3 Battery Mode 18
3.1.4 ECO Mode 19
3.1.5 Failure Mode 20
3.2 Operation 21
3.2.1 Startup and Initialization 21
3.2.2 Turn On the Inverter 22
3.2.3 Manual Battery Self-testing 24
3.2.4 Turn off the Inverter 25
3.2.5 Totally Shutdown the System 26

3.2.6 LCD Panel Operation 26
Chapter 4 Maintenance and Storage 27
I. Battery Maintenance 27
II. Keep Air Vent Unblocked 28
III. UPS State Check 28
IV. Function Inspection 28
Chapter 5 Troubleshooting 31
Appendix 1 LCD Panel Displays and Operation 35
1. Constitution of Display Panel 35
2. Function of display Panel 36
3. Menu Operation 39
4. Information LCD-displaying Priority 42
Relay Communication Mode 43
Appendix 2 Product Specification 46
Appendix 3 Accessories 49

6 Chapter 1 Product Introduction
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Chapter 1 Introduction
1.1 Application
GXT2-3X1 Series UPS provides high quality AC power to your precision instrument. It
can be applied in Computer Center , Network Management Center, Communication
System, Automation Control System, precision instrument or other Critical Systems.
1.2 Classification
" GXT2-3X1 " Series include 10kVA, 15kVA and 20kVA UPS products, shown in the
following table:
Capacity 10kVA 15kVA 20kVA
Model GXT2-3X1-0100L GXT2-3X1-0150L GXT2-3X1-0200L
Description Extended Battery
Cabinet is required
Extended Battery
Cabinet is required
Extended Battery
Cabinet is required
1.3 System Function Block
System can run with as a single UPS, or in Hot-standby mode to increase the system
reliability (Refer to figure 1-2).
Figure 1-1 single UPS module
Rectifier Inverter
Utility Utility Switch
Load
bypass
bypass breaker
Maintenance bypass
Maintenance
switch
Electronic
Transfer
Switch
Charger
Short circuit cable
for hot standby
Battery
Group1
Battery
Group 2

Chapter 1 Product Introduction 7
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Figure 1-2 hot-standby system
1.4 Features
GXT2-3X1 Series Three phase input/Single phase output 10kVA/15kVA /20kVA UPS
is an advanced, intelligent, Online with Sinusoidal waveform output UPS system. The
system adopts high-frequency double conversion topology structure with high input
power factor, wide input voltage range, with the following Key features:

UPS can operate with loss of input phases (up to 2 phases)
 Digital Signal Processing (DSP) Controlled.

Self- diagnostic

Intelligent battery management
 LCD & LED annunciation

Static by pass

Maintenance bypass

Large internal charger
Rectifier Inverter
Utility
Utility Breaker
Load
bypass
bypass Breaker
Maintenance bypass
Maintenance
switch
Electronic
Transfer
Switch
Charger
Battery
Group1
Battery
Group 2
Backup
UPS
Master UPS

Chapter 2 Installation 9
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Chapter 2 Installation
2.1 Unpacking Inspection
1. Unpack the packing box to move the UPS to position , be careful not to drop it as it is
heavy.
2. In the event of product damage due to transportation, please notify Liebert or its
authorized agent.
2.2 Outline and Panel Description
2.2.1 Outline
Figure 2-1 UPS Front view
LCD Display Panel
Ventilation holes on front panel
Supporting caster
Adjustable Footpad

10 Chapter 2 Installation
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Figure 2-2 Front view without panel
Figure 2-3 LCD display Panel
Air-inlet holes on Front Panel
Utility Switch
Bypass Switch
Maintenance Switch
Off Key
Utility
On/Silence Key
Fault
Enter Key
Bypass
Scroll Key
Battery
LCD Display
Inverter

Chapter 2 Installation 11
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Figure 2-4 rear panel
2.2.2 Front Panel
Parts' Function Description
Input Switch Used for controlling the utility input to UPS.
10kVA UPS uses three-pole 63A/250VAC breaker
15/20kVA UPS uses three-pole 100A/250VAC breaker
Bypass Switch Used for controlling the bypass input to UPS
10kVA UPS uses 80A/250VAC circuit breaker;
15/20kVA UPS uses 125A/250VAC circuit breaker
Maintenance
switch
For switching UPS to maintenance bypass.
Note: To be operated by trained technical Personnel only.
Front Panel air
inlet hole
for ventilation of UPS
LCD Panel and Description is in Appendix 1 in detail.
2.2.3 Rear Panel
Parts' Function Description
Input/output
terminals
Used for UPS input/output cable connection and
external battery connection for UPS
Contact closure port Provide Optical Coupler Dry Contact control
signal, for OS and UPS shutdown.
Alarm relay port bProvide relay Dry Contact alarm/ control signal,
contact closure port
Alarm Relay Port
Ventilation holes
Input/Output Terminals block

12 Chapter 2 Installation
E1-20010329-C-1.0
It can be included in monitoring system defined
by users .
Heat Dissipation and
ventilation holes
Used for heat dissipation and ventilation of UPS
2.3 Installation
2.3.1 Important Note
1. Please position the UPS on the flat ground/surface ..
2. The distance from the rear and side panels of the UPS to the wall or other equipment
should be greater than 20cm, and the air inlets on the front panel and at the bottom of
the UPS should be kept unobstructed to facilitate ventilation and heat dissipation.
3. Please ensure that the UPS is installed in an environment in compliance with UPS
environmental specification.
4. Avoid using the UPS in dusty or corrosive environment.
5. Even if the UPS is shutdown, there could be high voltage inside, untrained personnel
must not open the UPS as there may be danger of electric shock.
6. Install four-pole or three-pole interactive circuit breaker with capacity higher than
80A(suitable for 10kVA system）or 125A（for 15kVA/20kVA system）on the hot line
of Three-phase utility input to isolate the input source in case of emergency. When
using three-pole interactive circuit breaker, utility neutral line need not go through the
circuit breaker and can be connected with UPS' neutral line directly.
7. Please use right cable connection method to ensure the safety of UPS or customer
equipment::
Figure 2-5（a）right cable connection
Input hot
line
Input neutral
line
output
neutral line
U
P
S
Load
V
N
E
4-pole Interactive
circuit breaker
U
W
output hot
line

Chapter 2 Installation 13
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Figure 2-5 （b）wrong cable connection

Warning
Classified according to European standard EN55022 , this is an A level UPS product.
When it is used in family house, it may generate radio interference, user should take
other measures in this condition.
2.3.2 Installation Procedure
1. Prior to any wire connection, please confirm that all the input and output circuit
breakers are in “OFF”state;
2. As shown in Figure 2-6, connect the input cables（three hot lines, neutral line and
earth line）to the correspondent terminals and secure the screw;

Note
Please do not reverse connection of the input hot line and neutral line！
Because the input default configuration of system's U phase is bypass input, please
ensure the proper connection of U phase.
Please don't use the power source socket on the wall as the UPS' input source.
3. Connect the input cables （hot lines, neutral line and earth line）of user's equipment
to the correspondent UPS output terminals refer , figure 2-6 .

Note
When connecting the input and output cables, the input hot line and neutral line must
be connected correctly and the UPS must be connected to earth firmly.
Input hot
line
Input neutral
line
U
P
S
Load
N/E
U
W
V
output hot
line
output
neutral line

14 Chapter 2 Installation
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Figure 2-6（a）10kVA Input/output terminals( upper terminals' block）
Figure 2-6（b）10kVA Input/output terminals (lower terminals' block）
Figure 2-6（c）15/20kVA Input/output terminals (upper terminals' block）
Hot standby L1 End
Battery 1¡ °+¡ ±Terminal
+
-+-
L1 B_L
Hot standby B_N End
B_N
Battery 1¡ °-¡ ±Ter m i n a l
Battery 2¡ °+¡ ±Te r m i n a l
Battery 2¡ °-¡ ±Te r m i n a l
Hot standby B_L End
Output Neutral line
Output phase line
Input Neutral line
Input U phase line
NUVW
LN
Output GND
Input GND
Input V phase line
Input W phase line
-+-
+
L1 B_L B_N
Hot standby L1 End
Battery 1¡ °+¡ ±Te r m i n a l Hot standby B_N End
Battery 1¡ °-¡ ±Te r m i na l
Battery 2¡ °+¡ ±Terminal
Battery 2¡ °-¡ ±Terminal
Hot standby B_L End
NUVW
LN
Output Neutral line
Output phase line
Input Neutral line
Input U phase line
Output GND
Input GND
Input V phase line
Input W phase line
Battery1 + Terminal
Battrery1 - Terminal
Battery2 + Terminal
Battery2 - Terminal
Batter
y
1 + Terminal
Battery1 - Terminal
Battery2 + Terminal
Battery2 - Terminal

Chapter 2 Installation 15
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Figure 2-6（d）15/20kVA Input/output terminals( lower terminals' block）

Note
For 10kVA system, at least 8AWG or 10mm2copper wire should be used for input
neutral line, input U phase line, hot standby L1 terminal, B_L terminal, B_N terminal
and output neutral line and hot line；input V or W phase lines and battery lines should
be 10AWG or 6mm2copper wire at least.
For 15/20kVA system, at least 3AWG or 25mm2copper wire should be used for input
neutral line, input U phase line, hot standby L1 terminal, B_L terminal, B_N terminal
and output neutral line and hot line；input V or W phase lines and battery lines should
be 5AWG or 16mm2copper wire at least.
4. For external battery connection, please refer to the procedures of external battery
cables connection (please refer to figure 2-4);
5. To connect the UPS to servers for OS shutdown, please connect server's serial port
to the contact closure port at the rear of the UPS. Follow installation procedure of OS
shutdown software ( Liebert's multiLink ) for proper installation.
2.4 Connection of External Batteries
1. The system needs to be connected with two strings of 240V batteries, the switch on
the battery cabinet must be in "OFF" position, prior to connecting the batteries.

Note
Batteries of different models and make can not be used together.
2. Confirm that the batteries quantity conforms the UPS' specification, voltage of each
group of batteries should be 240 Vdc nominal or around 250 Vdc measured with a volt
meter.
3. Use a voltage meter to confirm that the voltage across the battery terminals on the
UPS Input/output terminals' block is zero, before connecting the battery cable to the
UPS.
4. According to the wire connection shown in Figure 2-10, connect the positive
pole( red ) and negative pole( black ) to the "+" and "-" battery terminals on terminals'
block respectively and secure the terminals, pay attention not to reverse the batteries
connection . For 15/20kVA UPS, it is necessary to use Ferrite T-core in the
accessories as shown in Figure 2-10;

16 Chapter 2 Installation
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Figure 2-10 connection of external batteries
5. Turn the switch on the battery cabinet to " ON " position.

Note
The battery connection and replacement should be done when the UPS is Completely
switched OFF, if batteries are replaced while UPS is ON (hot - swappable ) pay
attention not to reverse battery polarity. 2.5 Wire Connection for Hot Standby UPS
1. Confirm the input circuit breakers of the master UPS and slave UPS are in "OFF "
state ;
2. Remove the short circuit cable used for hot standby of the master UPS（the short
circuit cable between hot standby L1 terminal and B_L terminal）;
3. Connect the wires according to Figure 2-11.
Battery 1
Battery 2
+
_
+
Battery Cabinet
Breaker of Battery Cabinet
_

Chapter 2 Installation 17
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Figure 2-11（a）Wire connection for 10kVA Master-slave hot standby UPS
Input GND
-
N
+
WVUNL
+-
Backup UPS
B_LL1 B_N
Input W phase line in parallel
Input V phase line in Parallel
Input U phese line in Parallel
Input Neutral line in Parallel
Input GND in Parallel
Output GND in Parallel
Output phase line of Backup UPS is connected to the L
terminal of Master's bypass
Output neutral line of Backup UPS is connected to the N
terminal of Master's bypass
Master UPS
-
VUN
+-+
WLN
B_LL1 B_N
Input Neutral line
Input V phase line
Input V phase line
Input W phase line
Output phase line
Output Neutral line
Output GND

18 Chapter 2 Installation
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Figure 2-11（b）Wire connection for 15/20kVA Master-slave hot standby UPS
Please refer to section 2.3.2 Installation Procedures( item 3 ) for wire connection
requirement for 15/20kVA Master-slave hot standby UPS.

Note
Confirm the right connection of hot line and neutral line and proper earthing. For hot
standby UPS, the batteries of master UPS and slave UPS must be connected
separately.
NUVWLN
+-+- B_LL1 B_N
NUVWLN
-++- B_LL1 B_N
Input GND
Backup UPS
Input W phase line in parallel
Input V phase line in Parallel
Input U phese line in Parallel
Input Neutral line in Parallel
Input GND in Parallel
Output GND in Parallel
Output phase line of Backup UPS is connected to the L
terminal of Master's bypass
Output neutral line of Backup UPS is connected to the N
terminal of Master's bypass
Master UPS
Input Neutral line
Input V phase line
Input V phase line Input W phase line
Output phase line
Output Neutral line
Output GND

Chapter 3 Operation 19
E1-20010329-C-1.0
Chapter 3 Operation
3.1 Operating Mode
3.1.1 Normal Mode
When the input Utility voltage and the load are within specifications, the load is
supplied by inverter, which draws power from rectifier; meanwhile, the charger
float-charges or equalize-charges the battery. When in Normal mode, the Utility
indicator and inverter indicator on the LCD panel be green in colour ,as shown in Fig.
3-1.
Figure 3-1

Note
If the UPS is power by generator set , please follow the requirements below:
1. Start up the generator set first without switching on the loads, connect the UPS to the generator,
then switch on the loads one by one till the generator operates stably (to ensure reliable operation of
the generator, it is recommended that the UPS load be less than 30% of generator capacity).
2. It is recommended that the generator capacity be 1.5~2 times of UPS rated capacity.
3.1.2 Bypass Mode
When utility is present and UPS is not turned on , or in the event of overload or other
faults after the UPS is turned on, the load is supplied by Bypass AC source, which
feeds directly from the Utility input; and meanwhile the charger will charge the battery.
When in Bypass mode, the bypass indicator on the LCD panel turns green, as shown
in Fig. 3-2. Please note: In the event of bypass power failure or bypass voltage falling
outside tolerance when the UPS is in Bypass mode, the UPS will cease to supply
electricity to the load .
220.0V
OUTPUT VOLT

20 Chapter 3 Operation
E1-20010329-C-1.0
Figure 3-2

Note
Under this mode, if the bypass power fails or bypass voltage exceed the bypass
voltage windows. , the UPS will not provide power to the load.
3.1.3 Battery Mode
When the UPS is in Normal mode, in the event of Utility failure or Utility voltage outside
tolerances, the rectifier and charger will turn off , the battery begins to discharge and
supply the load through inverter. When the UPS operates in Battery mode, the battery
indicator and inverter indicator on the LCD panel turns green, as shown in Fig. 3-3,
accompanied with a beep every 3 seconds, giving alarm that the UPS is operating in
Battery mode.
Figure 3-3
In Battery mode, when the battery voltage is low the preset level , there will be a beep
every 1 second, and the LCD screen displays "BATTERY LOW SHUTDOWN
IMMINENT " .

Note:
215.0V
OUTPUT VOLT
220.0V
OUTPUT VOLT