Parallel Operations - PROLiNK Master II Series User Manual

2) Enter password
2) Press "SYS PARSMETER" then go to page 2. Select "Output Settings" and change "3-3" to "3-1".
NOTE: Parameter settings will only be saved when the UPS is off normally with batteries connected.

3- 5 . Parallel Operations

1. Initial startup of parallel systems
Please ensure that all running UPSs are parallel models and have the same configuration.
1) Turn on each UPS in AC mode (See sections 3-4(1). Then, measure the voltage
output of a single-phase inverter for each UPS with a multimeter. Calibrate the inverter output voltage
by configuring the inverter voltage adjustment (See the SETTING
è
CALI Inverter CALI) screen in the LCD menu until the difference in inverter output voltage of each
UPS is within 1V or less.
2) Turn off each UPS (see sections 3-4(7)). Then, follow the wiring procedure in sections 2-4.
3) Remove the port cover of the parallel shared current cable on the UPS, connect each UPS one
by one with parallel wires and shared current cables , then put the cover back on.
4) Turn on the parallel system in AC mode :
a) Turn on the input line breakers of each UPS. If using dual input units, also enable the external
bypass input breaker. After all UPSs enter bypass mode, measure the output voltage between
the two UPSs for the same phase to make sure the phase order is correct. If both voltage
differences are close to zero, it means that all connections are met. Or vice versa, please
check if the cable is connected properly.
b) Turn on the output breaker of each UPS.
c) Turn on each UPS in turn. After a while, the UPS should enter AC mode synchronously and then,
the parallel system is now complete.
è
Advance
36
è è
Maintainer VOL