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4.2
Wiring for parallel signal cable
Parallel signal cable connection diagram:
Remove the cover of ‘parallel box’, then connect each UPS one by one with ‘parallel
cable’, make sure the cable is screwed to parallel port tightly.
It is recommended to lock the ‘parallel cable’ (as above) for preventing the parallel ports
suffering an unexpected pulling-force and causing the parallel system fault.
4.3
Parallel system Operation
1.
Turn on the input breakers for the parallel UPS.
2.
Pressing button continuously for one UPS of the system, then the system will
start to turn on and enter line mode.
3.
Regulate the output voltage of each UPS separately, and check if the output voltage
difference is less than 0.5V among the parallel system. If the difference is more than
0.5V, the UPS need to be regulated.
4.
If the output voltage difference is less than 0.5V, pressing button continuously
for one UPS of the system, then the system will turn off. Turn off the input breakers
to let UPS shut down. Then switch on the output breakers for all the UPS.
5.
Turn on the input breakers for the parallel UPS. Pressing button continuously
for one UPS of the system, then the system will start to turn on and enter line mode
and the system will work normally in parallel.
