Page 1
POWER PROTECTION
UPStation GXT™ 6kVA Maintenance Bypass
USER MANUAL
Transformerless
with Configurable
Output Distribution
Page 2
Page 3
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standard Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BYPASS SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
C
ONFIGURABLE OUTPUT DISTRIBUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
15 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
20 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
30 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Other Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WIRING PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
P
OWER CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WALL-MOUNT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DIAGRAM FOR ATTACHING UNIT TO WALL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
HARDWIRE OUTPUT OPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Start-Up and Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON MAINTENANCE BYPASS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
O
N UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Shutting Down the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
O
N MAINTENANCE BYPASS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Transferring System From UPS to Maintenance Bypass Operation . . . . . . . . . . . . . . . 12
Transferring System From Maintenance Bypass to UPS Operation . . . . . . . . . . . . . . . 12
S
PECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE
INSTRUCTIONS
This manual contains important instructions that
should be closely followed during installation and
maintenance of this UPStation GXT 6kVA
Maintenance Bypass.
This product is designed for commercial / industrial
use only. This product is not intended for use with
life support and other designated “critical” devices.
Maximum load must not exceed that shown on the
Maintenance Bypass Cabinet rating label.
WARNING
!
LETHAL VOLTAGES MAY BE
PRESENT WITHIN THIS UNIT
EVEN WHEN IT IS APPARENTLY
NOT OPERATING. OBSERVE ALL
CAUTIONS AND WARNINGS IN
THIS MANUAL. FAILURE TO DO
SO MAY RESULT IN SERIOUS
INJURY OR DEATH. NEVER
WORK ALONE.
The UPStation GXT 6 kVA Maintenance Bypass is
designed for use on properly grounded (earthed)
208/240VAC 60 Hz supply, for installation by
qualified personnel. This UPS equipment is
intended to be installed by a qualified / certified
electrician who must review and approve customer
supplied wiring, circuit breakers, intended loads
and verify correct input, output and grounded
(earth) connections to ensure compliance with
technical standards and national and local
electrical codes. Installation instructions and
warning notices are in the Cable Installation
section of this manual beginning on page 6.
CAUTION
!
To reduce the risks of fire, connect
only to a circuit provided with
maximum branch circuit
overcurrent protection of 40A in
accordance with applicable
national and local electrical codes.
Install the bypass equipment in a clean
environment, free of conductive contaminants,
moisture, flammable liquids, gases, and corrosive
substances.
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GLOSSARY OF SYMBOLS
Risk of electrical shock
Indicates Warning or Caution followed by important instructions
i
Requests the user to consult the manual
Equipment grounding conductor
On
Off
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GENERAL DESCRIPTION
Congratulations on your purchase of Liebert's
UPStation GXT 6 kVA Maintenance Bypass. As
with every Liebert product, we stand behind our
quality. If you have any questions concerning this
Maintenance Bypass, please feel free to contact
your local sales representative, or call the
appropriate Technical Support number listed on
the back of this manual.
To ensure proper installation and operation of this
unit, please read this manual thoroughly.
While installation must be completed by a
qualified / certified electrician, general operation
may be performed without special training.
SYSTEM DESCRIPTION
The Liebert UPStation GXT 6 kVA Maintenance
Bypass is intended for use with the UPStation GXT
6 kVA UPS. Typical applications include
supporting workstations, servers, network, telecom
or other sensitive electronic equipment.
The UPStation GXT 6 kVA Maintenance Bypass
was designed to provide maximum system
availability to business-critical equipment. The
bypass allows for transfer of connected loads to an
alternate power path, allowing full isolation of the
UPS. After connected loads are switched to
alternate power and the UPS is isolated, the UPS
can be turned off and removed from service with
no interruption of power to connected loads.
The Configurable Output Distribution was
designed to provide maximum flexibility to
business-critical equipment.
Various output receptacle options are available
from 15 A to 30 A. Hardwire options are also
available with a branch rated circuit breaker.
Features
• Supports up to 30A loads
• Compact design
• Highly configurable
• Multiple power path indicators
• High-speed, break-before-make transfer
switch
Standard Components
• Provisions for hardwire output
• Power indicator lamps
• Branch rated circuit breakers
• Easily accessible terminal blocks
Options
• Field-installable output distribution kits
NOTE
The 120V loads need to be balanced on
the UPS output. To do this, when
connecting 120V equipment to the
Maintenance Bypass (MB), start at one
end of the MB and fill in toward the
other end.
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Maintenance Bypass component layout
UPS input power
present (amber)
UPS input
switch
(SW2)
Output
breaker
(CB1)
Bypass availability
indicator (amber)
Bypass
switch
(SW1)
UPS output
availability
indicator
(green)
Configurable
Output
Distribution
TOP VIEW
4312
GND3
GND1
4312312312 122
GND2
Utility
input
TB1
INSIDE VIEW— RECEPTACLE
PLATES AND END PLATE REMOVED
UPS
input
TB2
UPS
output
TB3
Hardwire
output
terminal
block
(TB4)
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MAJOR COMPONENTS
The following is a general description of each
component and its functions. Please review this
section carefully, as it will give you a better
understanding as to how the UPStation GXT 6 kVA
Maintenance Bypass operates.
BYPASS SWITCH
The Bypass Switch allows easy and rapid transfer
of connected loads between the UPS and bypass
source.
CONFIGURABLE OUTPUT DISTRIBUTION
Several receptacle and hardwire options are
available as user-selectable output distribution.
These are factory-configured when ordered and
also allow for field upgrades. Common receptacle
and hardwire options include:
15 Amp Options
5-15R2
L5-15R2
6-15R2-208
6-15R2-240
L6-15R2-208
L6-15R2-240
15A, 120V, 1 Pole Breaker for 1/2" & 3/4" conduit
15A, 208V, 2 Pole Breaker for 1/2" & 3/4" conduit
15A, 240V, 2 Pole Breaker for 1/2" & 3/4" conduit
20 Amp Options
5-20R2 (T-Slot)
L5-20R
L6-20R-208
L6-20R-240
L14-20R-240
20A, 120V, 1 Pole Breaker for 1/2" & 3/4" conduit
20A, 208V, 2 Pole Breaker for 1/2" & 3/4" conduit
20A, 240V, 2 Pole Breaker for 1/2" & 3/4" conduit
30 Amp Options
L5-30R
L6-30R-208
L6-30R-240
L14-30R-240
30A, 120V, 1 Pole Breaker for 1/2" & 3/4" conduit
30A, 208V, 2 Pole Breaker for 1/2" & 3/4" conduit
30A, 240V, 2 Pole Breaker for 1/2" & 3/4" conduit
Other Options
Single Position Blanking Plate
Hardwire Options
Single Position Plate with 1/2", 3/4" and 1"
conduit knockouts
Double Position Plate with 1-3/4" and 2"
conduit knockouts
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CABLE INSTALLATION
WIRING PREPARATION
!
CAUTION
Please read this section
thoroughly before attempting to
install wiring to this unit.
Be sure that the unit is not
connected to any AC mains power
source or UPS before installing
any wiring to this unit. This should
be installed by a qualified/certified
electrician.
For access to terminal blocks, see diagrams on
page 4.
NOTE
The 120V loads need to be balanced on
the UPS output. To do this, when
connecting 120V equipment to the
Maintenance Bypass, start at one end of
the output modules and fill in toward the
other end. Load balancing must be
performed with the UPStation
GXT6000T - 208X and 240X. It is not
required on the GXT6000T-208 because
the unit has no 120V output.
POWER CABLE INSTALLATION
Refer to the chart below when selecting cables:
Power Cable and Protection Ratings
208V 240V
Max Input Current 30 A 30 A
Input Protection 40 A 40 A
Max Output Current 30 A 30 A
2
(6 AWG)
2
(14 AWG)
Terminal Block Details
NOTE
Customer must supply power cables
between Maintenance Bypass and UPS,
utility and load. (GMB12 models are
supplied with an attached input power
cord complete with L14-30 plug.)
Max: 16 mm
Min: 2.5 mm
Torque: 2 Nm (16 in/lb)
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Connecting Maintenance Bypass to UPStation GXT6000T - 208
208
VAC
Output
12 3 4
TB4
Utility
input
L1
L2
GND3
GND2
MAINTENANCE BYPASS
GND1
Utility
TB1
2132132134
UPS input
TB2
UPS output
TB3
NOTE
When using the Maintenance
Bypass with an UPStation
GXT6000T-208, a jumper
(included with the accessory
kit) must be connected to the
TB3 (UPS output) terminal
block on the Maintenance
Bypass between TB3-1 and
TB3-2, as shown.
NOTE
GMB12 models are supplied
with an attached input power
cord complete with L14-30
plug.
L1 L2 L1 L2
Input Output Ext. battery
GXT6000T - 208
+-
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Connecting Maintenance Bypass to UPStation GXT6000T - 208X
120V
208V
120V
Output TB4
12 3 4
GND3
MAINTENANCE BYPASS
GND2
Utility
input
NOTE
GMB12 models are supplied
with an attached input power
cord complete with L14-30 plug.
L2
L1
N
GND1
Utility
TB1
213 213 2134
UPS input
TB2
GEC
L1 L2 N L1
Input Ext. battery
GXT6000T - 208X
UPSoutput
TB3
L2 L2A
Output
+-
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Connecting Maintenance Bypass to UPStation GXT6000T - 240X
120V
GND3
240V
Output TB4
12 3 4
MAINTENANCE BYPASS
GND1
120V
GND2
Utility
L2
input
L1
N
NOTE
GMB12 models are supplied
with an attached input power
cord complete with L14-30 plug.
Utility
TB1
213 213 2134
UPS input
TB2
L1 L2 N L1
Input
GXT6000T - 240X
UPSoutput
TB3
GEC
L2
Output
9
+-
Ext. battery
Page 14
WALL-MOUNT DIAGRAM
DIAGRAM FOR ATTACHING UNIT TO WALL
Use the following diagram, which shows the location and measurements of factory-cut mounting slots,
when preparing to attach the GXT Maintenance Bypass to a wall. Liebert recommends using 1/4-20
mounting screws. Rubber pads are supplied for placing the Maintenance Bypass on the floor.
178mm
7.00"
514mm
20.25"
C
L
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HARDWIRE OUTPUT OPTION
This product is intended to be installed by a
qualified electrician only.
1. COMPLETELY REMOVE ALL POWER FROM
THE FRAME. If the Maintenance Bypass is
connected to the UPS, disconnect external
battery supply.
2. Remove the end cover plate to access the
terminal block (see Accessing terminal
block below).
3. Without disconnecting from the terminal block,
unscrew and pull out the hardwire plate(s).
4. Route all wires from the hardwire plate(s) to
the terminal block.
5. Connect the GROUND wire to the grounding
bar strip (GND1).
Accessing terminal block
6. Connect the remaining wires in accordance
with the wiring diagram (located inside the
base enclosure).
NOTE
When wiring 120 V loads, LINE must be
alternated between TB4-1 and TB4-3 to
balance the 120V load. Connect all
neutral wires to TB4-4.
7. Replace the receptacle plates and the end
cover plate, using care to not damage the
wires.
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OPERATING PROCEDURES
START-UP AND INITIALIZATION
Follow these steps in order to start up the
GXT 6kVA UPS while connected to the
Maintenance Bypass.
ON MAINTENANCE BYPASS
1. Set the Maintenance Bypass switch (SW1) to
UPS position.
2. Close (position I) UPS Input switch (SW2).
3. Close (position I) Output Circuit breaker
(CB1).
ON UPS
1. Close (position I) battery circuit breaker.
2. Close (position I) input circuit breaker.
3. Close (position I) output circuit breaker.
4. After the start-up sequence the UPS will
automatically default to its internal bypass.
The bypass LED will be lit.
5. Press UPS On/Alarm/Battery Test button for at
least one second to turn the UPS on. The
UPS ON LED will be lit.
6. Connected equipment may now be switched
on.
SHUTTING DOWN THE UPS
Use the following procedure to power down the
system.
ON UPS
1. Press Output OFF/Bypass button for at least
1 second, twice, within 4 seconds.
2. Open (position O) UPS output, input and
battery circuit breakers.
ON MAINTENANCE BYPASS
1. Open (position O) output breaker (CB1).
2. Open (position O) UPS input switch (SW2).
TRANSFERRING SYSTEM FROM UPS TO MAINTENANCE BYPASS OPERATION
1. On UPS verify that Bypass LED is lit, if not,
press UPS OFF/Bypass button for at least
one second.
2. On Maintenance Bypass verify that the
Bypass lamp is illuminated.
3. Rotate Bypass switch SW1 to the Bypass
position.
4. Set UPS Input switch SW2 to the Off position
(position O). This will remove power from UPS
input.
CAUTION
!
The connected load is now
powered by the bypass source and
is not protected.
TRANSFERRING SYSTEM FROM MAINTENANCE BYPASS TO UPS OPERATION
1. On Maintenance Bypass close (position I)
UPS Input switch (SW2).
2. On UPS close (position I) input, output and
battery circuit breakers.
3. After the start-up sequence the UPS will
automatically default to its internal bypass.
The bypass LED will be lit.
4. Press UPS ON/Alarm/Battery Test button for
at least one second to turn the UPS on. The
UPS ON LED will be lit.
5. On Maintenance Bypass verify that UPS
Output LED is illuminated.
6. Rotate Bypass switch SW1 to the UPS
position.
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SPECIFICATIONS
Typical Transfer Time
(to or from maintenance bypass)
Input Voltage Nominal 208VAC or 240VAC
Total Current 30A max.
Operating Ambient Temperature 0° to +40° C
Storage Ambient Temperature -20° to +60° C
Dimensions, W x D x H, in (mm) 8.2 x 21.0 x 6.2 (209 x 534 x 158)
Chassis Weight (no receptacles) 10 lbs.
Distribution Module Weights (each) 2 lbs.
Connections to UPS Hardwire Terminal Blocks
Humidity 0 to 95%, non-condensing
Agency/Standards UL 1778, c-UL
< 6 milliseconds
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POWER PROTECTION
UPStation GXT 6kVA Maintenance Bypass
USER MANUAL
The Company Behind the Products
With over a million installations around the globe,
Liebert is the world leader in computer protection
systems. Since its founding in 1965, Liebert has
developed a complete range of support and
protection systems for sensitive electronics:
• Environmental systems—close-control air
conditioning from 1 to 60 tons
• Power conditioning and UPS with power
ranges from 300 VA to more than 1000 kVA
• Integrated systems that provide both
environmental and power protection in a
single, flexible package
• Monitoring and control—from systems of any
size or location, on-site or remote
• Service and support through more than 100
service centers around the world and a 24/7
Customer Response Center
While every precaution has been taken to ensure
the accuracy and completeness of this literature,
Liebert Corporation assumes no responsibility and
disclaims all liability for damages resulting from
use of this information or for any errors or
omissions.
© 2002 Liebert Corporation
All rights reserved throughout the world.
Specifications subject to change without notice.
® Liebert and the Liebert logo are registered
trademarks of Liebert Corporation. All names
referred to are trademarks or registered
trademarks of their respective owners.
SL-23447 (8/02) Rev. 2
Technical Support/ Service
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@liebert.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@liebert.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@liebert.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Italy
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD)
+39 049 9719 111
Fax: +39 049 5841 257
Asia
23F, Allied Kajima Bldg.
138 Gloucester Road
Wanchai
Hong Kong
+852 2 572 2201
Fax: +852 2 831 0114
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