Vertiv Liebert APM Plus - External Protective Device; Power Cable; LBS Cable

8.4.2 External Protective Device
Refer to External Protective Device.
8.4.3 Power Cable
The power cable of dual-bus power system is similar to that of single system. 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.
8.4.4 LBS Cable
For 250 kVA dual bus system, connect the optional LBS cables (10 m, 15 m, 20 m) between the LBS ports (J4) or PARA2 and
LBS port the two UPS systems shown in Figure 8.7 on the facing page. The J4 port and PARA port are provided on the front
panel of the bypass control module, as shown in Figure 8.8 on page141.
N O T E: You must use the shortest LBS cable to suit the ap plication and m ust not coil excess.
M eanw h ile, sep arate the L BS cab le from th e p ow er cables to prevent electrical interferences.
8 Parallel System and LBS System
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Vertiv™ Liebert® APM Plus User Manual