8.2.3 External Protective Device
W ARN ING ! H igh earth leakage cu rrent: Earth connectio n is critical b efore connecting the
inpu t supply (including both m ain s supply and battery).
W ARN ING ! T he equip m ent m ust be earthed in accordance w ith the local electrical code of
practice.
Refer to External Protective Device.
8.2.4 Power Cable
The power cable wiring is similar to that of the UPS module. Refer to Wiring of Power Cable.
The bypass and rectifier input supplies must use the same neutral line input terminal. If the input has a current leakage
protective device, the current leakage protective device must be fitted upstream of the neutral line input terminal.
N O T E: The p ow er cables (including the bypass input cables and UPS outp ut cab les) of each UPS
m odule should be of the sam e length and specifications to facilitate load sharing.
8 Parallel System and LBS System
130
Vertiv™ Liebert® APM Plus User Manual
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