30 Chapter 3 Parallel UPS Installation And Commissioning
Liebert
®
ITA 5kVA And 6kVA UPS User Manual
thirty seconds, after the UPS has output, the inverter indicator will turn on. Measure that the inverter output voltage is
normal.
2) Close the input MCB, external input MCB, output MCB and battery MCB of the second UPS (if POD is configured,
close the corresponding input MCB and output MCB of the POD). Follow the preceding steps to start the inverter of the
second UPS, check that there is no alarm on the LCD display screen, and confirm that the UPS parallel works
normally.
3) Follow the preceding methods to start up the inverter of the third or the fourth UPS to connect the UPS into the
parallel system.
Warning
During the parallel startup, confirm that the external output MCB of each UPS has been closed, and that all the inverter output of
the UPSs are parallel connected.
