Installation
17
2.5 Cable Connection
The Liebert GXT3 rear panel has an input cable and plug, output receptacles and output cable(s)
(Output cables are on GXT3-3000 models only). Refer to 1.3.2 - Rear Panel Features for details.
The battery cables are supplied with the battery cabinet.
2.5.1 Connecting Input Plug and Loads
The specification of input circuit breaker on the rear panel of UPS is given in Table 2.
1. Plug all loads into the output receptacles on the rear panel of the Liebert GXT3.
2. Insert the input plug of Liebert GXT3 into the input power connection.
2.5.2 Connecting Battery Cables
1. Switch Off the input breaker of the battery cabinet.
2. Take out the battery cable included with the battery cabinet.
3. Connect one end of the battery cable to the external battery connector on the rear panel of the
UPS, and connect the other end to any battery port on the rear panel of the battery cabinet.
4. Switch On the battery breaker on the rear of the external battery cabinet.
5. Use the Configuration Program included with the UPS to specify the number of external battery
cabinets connected to the Liebert GXT3. See Table 14 for approximate battery run times.
NOTE
Ensure that all the loads are turned Off.
Prepare an input power supply that is properly protected by a circuit breaker in accordance
with national and local electrical codes. The wall receptacle must be grounded.
Emerson recommends installing an upstream circuit breaker of the same series as the Liebert
GXT3’s input circuit breaker.
Table 2 Input circuit breaker specification
Model
Rated Circuit
Breaker
GXT3-500RT120 8A
GXT3-700RT120 10A
GXT3-1000RT120 15A
GXT3-1000MT120 15A
GXT3-1500RT120 15A
GXT3-2000RT120 20A
GXT3-3000RT120 30A
GXT3-3000RT208 20A
NOTE
Distribute loads evenly across all receptacles to prevent overloading individual receptacles.
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