Vertiv | Liebert® GXT5™ | Installer/User Guide 25
2.6. Hardwired Input/Output Connections
WARNING! Risk of electric shock
Can cause equipment damage, injury and death. Before beginning installation, verify that all external over-current
protection devices are open (O), and that they are locked-out and tagged appropriately to prevent activation
during the installation, verify with a voltmeter that power is O and wear appropriate, OSHA-approved personal
protective equipment (PPE) per NFPA 70E. Failure to comply can cause serious injury or death. Before proceeding
with installation, read all instructions. Follow all local codes.
Table 2-1 below, lists the four types of I/O connection are available depending on the UPS model. Some models
oer more than one type.
Table 2-1 I/O Connection Types by Model
MODEL LINES IN/OUT CONFIGURATION
5-kVA, 6-kVA 1-in 1-out Common source
8-kVA, 10-kVA 1-in 1-out Common Source or Split bypass
16-kVA, 20-kVA 1-in 1-out or 3-in 1-out Common Source or Split bypass
2.6.1. Branch Circuit Breaker
The installer must provide an upstream branch circuit breaker, see Table 2-2 on the next page, for the ratings. The
input circuit breaker on the distribution box and the output circuit breaker on the rear of the power distribution
box disconnect all power between the main cabinet and the distribution box. Figure 2-4 on the next page, shows
a diagram of the circuit breakers.
Observe the following guidelines and specications when making the hard-wire input and output connections:
• Provide circuit-breaker protection according to local codes. The mains disconnect should be within sight of
the UPS or have an appropriate lock-out.
• Maintain service space around the UPS or use exible conduit.
• Provide output-distributions panels, circuit-breaker protection, or emergency disconnects according to local
codes.
• Do not install input and output wiring in the same conduit.
Models equipped with a manual bypass breaker pass bypass power directly to the bypass breaker from the input
terminal block. The input circuit breaker on the distribution box does not disconnect power from the manual
bypass breaker.
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