Liebert UPS System

Chapter 3 Electrical Assembly

Battery

cables

UPS input

input N

UPS output

output N

Fig. 3-1 20/30kVA UPS bottom cable output

Battery cables Rectifier input Bypass input

Bypass N

UPS output

Output N

Fig. 3-2 40/60kVA UPS cable connection at bottom

2. Cable routing

1. Bottom entry configuration – the cables are input and output from the bottom of

the UPS

2. Top entry configuration – the cables are input and output from the top of the

UPS. To do this, punch out the cable entry cut-outs on the top of the UPS,

and feed the cables through the cutouts and guide them through the metal

conduit to the bottom of the UPS. From the front view, the battery cable, the

input power cables of rectifier and bypass input cables should be input from

the left. The output cable and signal cables should be input from the right.

The layout of the cables is shown in Figure 2-8.