Vertiv Liebert EXM2 - External Protective Device; Power Cable

Figure 8.6 LBS system (parallel system )
N O. D esc rip tio n NO. D esc rip tio n
1 Bypass 6 Q2
2 Rectifier 7 Q3
3 UPS 1 8 Q5
4 UPS 4 9 Parallel cable
5 Q1
N O T E: Q 1, Q 2 and Q 5 are optional while Q 3 is stand ard.
N O T E: In a dual-bus system , the two UPS system s m ust have th e sam e power rating, voltage and
freq u ency, and the load should not exceed the power ratin g of a U PS m odule system .
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 Parallel System and LBS System
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Vertiv™ Liebert® EXM2 UPS User Manual