Vertiv | Liebert® GXT5™ | Installer/User Guide 31
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 overcurrent
protection devices are open (Off), and that they are locked-out and tagged appropriately to prevent
activation during the installation, verify with a voltmeter that power is Off 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 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 2-5 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.
• We recommend using a Class D circuit breaker.
• 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.
• The input earth leakage current (ELC) generated by the UPS input RFI filter under steady state
nominal voltage conditions is above 3.5mA. However in the practical application environment the earth
leakage current by the UPS cannot be predicted or quantified due to external supply perturbations.
Therefore, we do not recommend the use of an MCB with ELC protection upstream of UPS.
To Next Page
Loading...
Need help?
General
