Liebert S600 User Manual page 30

Sharing battery strings (20kVA only)
Using the shared battery strings in the parallel system can save investment in equipment for the users.
1. If the battery strings (four standard battery modules, option) are shared in parallel system, the backup time of the
battery module ranges from two minutes to three minutes at full load.
2. To ensure the abundant backup time of the battery, it is recommended to use the external battery cabinet with big
capacity .
Wiring
Power off the parallel system completely, disconnect the battery MCBs of all single UPSs, and then use battery cables
(refer to 2.4 Connecting Power Cables for the cables and the MCBs) to connect '+', 'N', '-' and 'PE' terminals of the
battery strings respectively to 'BAT+', 'BAT-', 'BAT N' and 'PE' terminals of the corresponding I/O terminal block of
the UPS in the parallel system through each battery MCB, as shown in Figure 3-3.
Figure 3-3
Connection diagram fof shared battery string in 1+1 parallel system
Refer to Figure 3-4 to configure the positive battery string and negative battery string.
Vertiv|Liebert® S600 10kVA ~ 20kVA UPS | User Manual 30