This Manual Contains Important Safety Instructions. Read all safety and operating instructions
before operating the Uninterruptible Power Supply (UPS). Adhere to all warnings on the unit and in
this manual. Follow all operating and user instructions. This equipment can be operated by individuals without previous training.
This product is designed for Commercial/Industrial use only. It is not intended for use with life support and other designated “critical” devices. Maximum load must not exceed that shown on the UPS
rating label. The UPS is designed for data processing equipment. If uncertain, consult your dealer.
See Limited Warranty.
This UPS is designed for use on a properly earthed (grounded), 220-240 VAC, 50Hz or 60Hz supply,
for installation by qualified personnel. A qualified electrician must review and approve customer supplied wiring, circuit breakers, intended loads, and verify correct input, output and earth connections
to ensure compliance with technical standards and local electrical codes of practice. Installation
instructions and warning notices only for use by qualified personnel are located after the UPS operator instructions in this manual.
WARNING
!
This UPS should not be supplied from electrical power systems of the “IT” (Impédance à
Terre) type. (IEC 364-ELECTRICAL INSTALLATION OF BUILDINGS)
ELECTROMAGNETIC COMPATIBILITY—This UPS complies with the requirements of the EMC
Directive 89/336/EEC and the published technical standards. Continued compliance requires installation in accordance with these instructions and the use of manufacturer approved accessories only.
WARNING
!
This is a product for restricted sales distribution to informed partners. Installation
restrictions or additional measures may be needed to prevent radio interference.
Operate the UPS in an indoor environment only in an ambient temperature range of 0-40°C
(32-104°F). Install it in a clean environment, free from moisture, flammable liquids, gases and corrosive substances.
This UPS contains no user serviceable parts. The UPS ON/OFF push buttons do not electrically isolate internal parts. Under no circumstances attempt to gain access internally, due to the risk of electric shock or burn.
Do not continue to use the UPS if the front panel indications are not in accordance with these operating instructions, or the UPS performance alters in use. Refer all faults to your dealer.
Only trained engineers authorized by Liebert should perform troubleshooting. To replace batteries,
refer all servicing to qualified service personnel. Proper disposal of batteries is required. Refer to your
local laws and regulations for disposal requirements.
Never block or insert any object into the ventilation holes or other openings.
DO NOT CONNECT equipment that could overload the UPS or demand DC current from the UPS,
for example: electric drills, vacuum cleaners, laser printers, hairdryers or any appliance using half
wave rectification.
Storing magnetic media on top of the UPS may result in data loss or corruption.
Turn the off UPS and isolate the UPS before cleaning. Use only a soft cloth, never liquid or aerosol
cleaners.
1
GLOSSARY OF SYMBOLS
Risk of electrical shock
!
R
i
-
PbH2SO4
Indicates caution followed by important instructions
AC input
AC output
Requests the user to consult the manual
+
Indicates the unit contains a valve-regulated lead acid battery
Recycle
DC voltage
Equipment grounding conductor
Bonded to ground
AC voltage
ON/Alarm Silence/Battery Test
OFF/Bypass
Indicates the position of a fuse
2
1.0INTRODUCTION
Congratulations on your choice of the Liebert UPStation GXT2-6000RT230 and GXT2-4500RT230
Uninterruptible Power System (UPS). It provides conditioned power to microcomputers and other
sensitive electronic equipment.
Upon generation, AC power is clean and stable. However, during transmission and distribution it
may be subject to voltage sags, spikes, or complete power failure that may interrupt computer operations, cause data loss, or even damage equipment. The UPStation GXT2 protects equipment from
these disturbances.
The UPStation GXT2 comes in nominal power ratings of 4500 VA and 6000 VA. Complete model specifications appear at the end of this manual.
The UPStation GXT2 is a compact, on-line UPS. An on-line UPS continuously conditions and regulates its output voltage, whether mains power is present or not. It supplies connected equipment with
clean sinewave power. Sensitive electronic equipment operates best from sinewave power.
For ease of use, the UPStation GXT2 features a light-emitting diode (LED) display to indicate both
load percentage and battery capacity. It also provides self-diagnostic tests, a combination ON/Alarm
Silence/Manual Battery Test button, a Standby button, user configurable program, and two levels of
alarms when the unit is operating on battery.
The UPStation GXT2 has an interface port for communication between the UPS and a network server
or other computer systems. This port provides detailed operating information including voltages, currents, and alarm status to the host system when used in conjunction with Liebert MultiLink™ software. MultiLink software can also remotely control UPS operation.
Introduction
3
2.0SYSTEM DESCRIPTION
System Description
InputOutput
L1
N
GG
TVSS &
EMI/RFI
Filters
Rectifier
/PFC
DC-to-DC
Converter
Battery
Charger
Dynamic
Bypass
Inverter
Battery
L1
N
2.1Transient Voltage Surge Suppression (TVSS) and EMI/RFI Filters
These UPS components provide surge protection and filter both electromagnetic interference (EMI)
and radio frequency interference (RFI). They minimize any surges or interference present in the
mains line and keep the sensitive equipment protected.
In normal operation, the rectifier/power factor correction (PFC) circuit converts mains AC power to
regulated DC power for use by the inverter while ensuring that the waveshape of the input current
used by the UPS is near ideal. Extracting this sinewave input current achieves two objectives:
• The mains power is used as efficiently as possible by the UPS.
• The amount of distortion reflected on the mains is reduced.
This results in cleaner power being available to other devices in the building not being protected by
the UPStation GXT2.
2.3Inverter
In normal operation, the inverter utilizes the DC output of the power factor correction circuit and
inverts it into precise, regulated sinewave AC power. Upon a mains power failure, the inverter
receives its required energy from the battery through the DC to DC converter. In both modes of operation, the UPS inverter is on-line and continuously generating clean, precise, Regulated Ac Output
Power.
2.4Battery Charger
The battery charger utilizes energy from the mains power and precisely regulates it to continuously
float charge the batteries. The batteries are being charged whenever the UPStation GXT2 is connected to mains power.
4
2.5DC-to-DC Converter
The DC to DC converter utilizes energy from the battery system and raises the DC voltage to the optimum operating voltage for the inverter. This allows the inverter to operate continuously at its optimum efficiency and voltage, thus increasing reliability.
2.6Battery
The UPStation GXT2 utilizes valve-regulated, nonspillable, lead acid batteries. To maintain battery
design life, operate the UPS
in an ambient temperature of 20°C to 25°C (68°F to 77°F). Optional external battery cabinets are
available to extend battery run times.
2.7Dynamic Bypass
The UPStation GXT2 provides an alternate path for mains power to the connected load in the
unlikely event of a UPS malfunction. Should the UPS have an overload, overtemperature, or UPS
failure condition, the UPS automatically transfers the connected load to bypass. Bypass operation is
indicated by an audible alarm and illuminated amber Bypass LED (other LEDs may be illuminated to
indicate the diagnosed problem). To manually transfer the connected load from the inverter to bypass,
press the Standby button once.
NOTE
The bypass power path does NOT protect the connected equipment from disturbances
in the mains supply.
System Description
5
3.0MAJOR COMPONENTS
The GXT2 is composed of three major assemblies to provide easier handling, installation, and versatility.
3.1Main Frame and Electronics
This 5U cabinet is shipped with internal batteries installed and a basic, hardwire distribution box
attached and ready to install.
Figure 1GXT2, front view
Top Trim
(2 pieces;
tower use
only)
Major Components
Lower Bezel &
Battery Access
Door
Status
Indicators
& Controls
Upper
Bezel
!
UPStation GXT
6
Figure 2GXT2, rear view
Battery
Disconnect
Major Components
External Battery
Connector
UPS Output
Circuit Breaker
DB-9
Communication
Port
Removable Power
Distribution Box
Fans
REPO Connector
Relay Card Slot
Serial Card Slot
(SNMP, OCWEB, USB)
3.2Internal Battery Packs
The UPS has two internal battery packs behind a battery access door on the front of the unit. Each
pack is fitted with a connector to link to the UPS.
Figure 3Internal battery pack with connector
7
3.3Removable Power Distribution Box
The UPS arrives with a basic hardwire power distribution pack installed. This box always contains
the UPS input circuit breaker.
Optional versions may be available to replace the standard box for custom installations.
Major Components
Figure 4
Power distribution boxes, basic, optional
Basic Hardwire Power Distribution Box
PD-CEHDWR
NOTE
Hardwire and hardwire/receptacle boxes that include a manual bypass switch allow
AC power to continue to flow from the mains input to the load while the box is removed
from the UPS. For details, refer to 11.2 - AC Power Connections.
Optional Hardwire Power Distribution
Box with Maintenance Bypass Switch
PD-CEHDWRBYP
8
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