NOTE2:
For
UPSs with isolation output transformers, the neutral of the input must be connected together after
the input distribution switch. You can connect the input N terminal of each UPS together directly.
4. Parallel Operation
1)
Make sure that the parallel board and OP relay board have been installed correctly.
2)
Make sure that each UPS has the same configuration, including the following parameters:
a)
output voltage,
b)
output frequency,
c)
bypass voltage range,
d)
bypass frequency range,
e)
converter enable or disable,
f)
bypass enable or disable,
g)
bypass open or forbidden,
h)
frequency auto detect enable or disable,
i)
inverter short clear enable or disable
3)
Turn on the UPS into the line mode or battery mode respectively, and measure the output voltage by
multimeter. Make sure the difference of the each phase output voltages among the UPSs is less than
1.5V(typical 1V). If not, you can adjust the inverter voltage of each UPS via LCD as bellow:
Inverter A voltage adjustment
Interface
Setting
Parameter 2:
you may choose
Add
or
Sub
to adjust inverter A
voltage
Parameter 3:
the voltage range is from 0V to 9.9V, the default
value is 0V.
Inverter B voltage adjustment
Interface
Setting
Share current
cable
Share current
cable
