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Parallel UPS Installation And Commissioning
'Bat -' and 'PE' terminals of the corresponding UPS I/O terminal block in parallel system through each battery MCB, as shown
in Figure 4-4.
Figure 4-4 Connection diagram of shared battery string in 1 + 1 parallel system
Refer to Figure 4-5 to configure the positive battery string and negative battery string
Battery cabinet
first Block
Figure 4-5 Internal connection diagram for positive battery string and negative battery string
2. Setting
Power on the system, set each single UPS to shared battery string configuration through the Service Software 'Settings' ->
'Shared Battery' from each UPS unit; set the Service Software 'Settings' -> 'Battery Cells Number' and 'Single Group Batt Cap'
from each UPS unit, and each UPS unit setting must be the same.
1. For the parallel system used the shared battery strings, make sure that the
details of the settings.
2. For the parallel system used the shared battery strings, the 'Single Group Batt Cap' on the
for the total capacity of battery strings, and each UPS can calculate the battery capacity itself automatically.
3. Close the battery MCB of each UPS.
38
UPS 1
Bat＋ Bat N Bat－
PE
UPS 1 MCB
＋
－
PE
Positive battery
string
second Block
Battery string
UPS 2
Bat＋ Bat N Bat－ PE
UPS 2 MCB
＋
－
Negative battery string
third Block
Note
Service Software
User Manual 10H52188UM60 - Rev. 2 - 09/2012
PE
sixteen Block
settings are correct. Refer to 4.4.2 for
Service Software
setting of each UPS stands
Liebert NXC
Bat+
Bat-
PE
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