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 to turn off the system. 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.
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