POWER PROTECTION
UPStation GXT™ 6kVA Maintenance Bypass
USER MANUAL
Transformerless
with Configurable
Output Distribution
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TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Standard Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MAJOR COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
BYPASS SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CONFIGURABLE OUTPUT DISTRIBUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
15 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
20 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
30 Amp Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WIRING PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
POWER CABLE INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
WALL-MOUNT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DIAGRAM FOR ATTACHING UNIT TO WALL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
HARDWIRE OUTPUT OPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON MAINTENANCE BYPASS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ON MAINTENANCE BYPASS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
i
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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.
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.
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 60Hz 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
1
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GENERAL DESCRIPTION
Congratulations on your purchase of Liebert's
Features
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.
• Supports up to 30A loads
• Compact design
• Highly configurable
• Multiple power path indicators
• High-speed, break-before-make transfer
switch
Standard Components
To ensure proper installation and operation of this
unit, please read this manual thoroughly.
• Provisions for hardwire output
• Power indicator lamps
• Branch rated circuit breakers
• Easily accessible terminal blocks
While installation must be completed by a
qualified / certified electrician, general operation
may be performed without special training.
Options
SYSTEM DESCRIPTION
• Field-installable output distribution kits
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.
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.
3
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Maintenance Bypass component layout
Bypass availability
indicator (amber)
UPS input power
present (amber)
UPS input
switch
(SW2)
Bypass
switch
(SW1)
Output
breaker
(CB1)
UPS output
availability
indicator
(green)
Hardwire
output
terminal
block
1
2
3 4
Configurable
Output
(TB4)
Distribution
GND3
GND1
1 2 3 1 2 3 1 2 3 4
GND2
TOP VIEW
Utility UPS
input input
UPS
output
TB3
TB1
TB2
INSIDE VIEW— RECEPTACLE
PLATES AND END PLATE REMOVED
4
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MAJOR COMPONENTS
The following is a general description of each
20 Amp Options
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.
5-20R2 (T-Slot)
L5-20R
L6-20R-208
L6-20R-240
BYPASS SWITCH
L14-20R-240
The Bypass Switch allows easy and rapid transfer
of connected loads between the UPS and bypass
source.
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
CONFIGURABLE OUTPUT DISTRIBUTION
30 Amp Options
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:
L5-30R
L6-30R-208
L6-30R-240
L14-30R-240
15 Amp Options
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
5-15R2
L5-15R2
6-15R2-208
Other Options
6-15R2-240
Single Position Blanking Plate
Hardwire Options
L6-15R2-208
L6-15R2-240
Single Position Plate with 1/2", 3/4" and 1"
conduit knockouts
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
Double Position Plate with 1-3/4" and 2"
conduit knockouts
5
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CABLE INSTALLATION
WIRING PREPARATION
POWER CABLE INSTALLATION
Refer to the chart below when selecting cables:
!
CAUTION
Power Cable and Protection Ratings
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.
208V
240V
Max Input Current
Input Protection
Max Output Current
30 A
40 A
30 A
30 A
40 A
30 A
2
Max: 16 mm (6 AWG)
2
Terminal Block Details
Min: 2.5 mm (14 AWG)
Torque: 2 Nm (16 in/lb)
For access to terminal blocks, see diagrams on
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.)
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.
6
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Connecting Maintenance Bypass to UPStation GXT6000T - 208
208
VAC
Output
TB4
1
2
3
4
GND3
MAINTENANCE BYPASS
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.
GND1
Utility
TB1
UPS input
TB2
UPS output
TB3
GND2
1
2
3
1
2
3
1
2
3
4
Utility
input
L1
L2
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
7
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Connecting Maintenance Bypass to UPStation GXT6000T - 208X
120V
208V
120V
Output TB4
1
2
3
4
GND3
MAINTENANCE BYPASS
GND1
Utility
TB1
UPS input
TB2
UPSoutput
TB3
GND2
1
2
3
1
2
3
1
2
3
4
Utility
input
L2
L1
N
GEC
NOTE
L1
L2
N
L1
L2
Output
L2A
GMB12 models are supplied
with an attached input power
cord complete with L14-30 plug.
+
-
Input
Ext. battery
GXT6000T - 208X
8
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Connecting Maintenance Bypass to UPStation GXT6000T - 240X
120V
240V
120V
Output TB4
1
2
3
4
GND3
MAINTENANCE BYPASS
GND1
Utility
TB1
UPS input
TB2
UPSoutput
TB3
GND2
1
2
3
1
2
3
1
2
3
4
Utility
input
L2
L1
N
GEC
NOTE
L1
L2
N
L1
Output
GXT6000T - 240X
L2
+
-
GMB12 models are supplied
with an attached input power
cord complete with L14-30 plug.
Input
Ext. battery
9
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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
10
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HARDWIRE OUTPUT OPTION
This product is intended to be installed by a
qualified electrician only.
6. Connect the remaining wires in accordance
with the wiring diagram (located inside the
base enclosure).
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.
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.
5. Connect the GROUND wire to the grounding
bar strip (GND1).
Accessing terminal block
11
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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.
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.
ON MAINTENANCE BYPASS
1. Set the Maintenance Bypass switch (SW1) to
UPS position.
2. On Maintenance Bypass verify that the
Bypass lamp is illuminated.
2. Close (position I) UPS Input switch (SW2).
3. Close (position I) Output Circuit breaker
(CB1).
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.
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.
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).
6. Connected equipment may now be switched
on.
2. On UPS close (position I) input, output and
battery circuit breakers.
SHUTTING DOWN THE UPS
Use the following procedure to power down the
system.
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.
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.
6. Rotate Bypass switch SW1 to the UPS
position.
ON MAINTENANCE BYPASS
1. Open (position O) output breaker (CB1).
2. Open (position O) UPS input switch (SW2).
12
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SPECIFICATIONS
Typical Transfer Time
(to or from maintenance bypass)
< 6 milliseconds
Input Voltage
Nominal 208VAC or 240VAC
30A max.
Total Current
Operating Ambient Temperature
Storage Ambient Temperature
Dimensions, W x D x H, in (mm)
Chassis Weight (no receptacles)
0° to +40° C
-20° to +60° C
8.2 x 21.0 x 6.2 (209 x 534 x 158)
10 lbs.
Distribution Module Weights (each) 2 lbs.
Connections to UPS
Humidity
Hardwire Terminal Blocks
0 to 95%, non-condensing
UL 1778, c-UL
Agency/Standards
13
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POWER PROTECTION
UPStation GXT 6kVA Maintenance Bypass
USER MANUAL
Technical Support/Service
The Company Behind the Products
Web Site
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:
Monitoring
800-222-5877
Outside the US: 614-841-6755
•
•
•
Environmental systems—close-control air
conditioning from 1 to 60 tons
Single-Phase UPS
800-222-5877
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
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
•
•
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
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.
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
© 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.
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
SL-23447 (8/02) Rev. 2
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