Njoy Ranger 30KR User Manual page 61

NOTE: The parameter settings will be saved only when UPS shuts down
normally with battery connected.
3.5 Parallel Operation
1. Parallel system initial startup
Please make sure that all of the running UPSs are parallel models and have
the same configuration.
• Turn on each UPS in AC mode respectively (Refer to section 3-4(1).
Then, measure the inverter output voltage of each phase for each UPS
with a multi-meter. Calibrate the inverter output voltage by configuring
inverter voltage adjustment (Refer to SETTING ADVANCE SYS PA-
RAMETERS VOL CALI screen) in LCD menu until the inverter output
voltage difference of each UPS is within 1V or less.
• Turn off each UPS (Refer to section 3-4(7). Then, follow the wiring
procedure in section 2-4.
3) Remove the cover of parallel share current cable port on the UPS,
connect each UPS one by one with the parallel cable and share current
cable, and then replace the cover.
4) Turn on the parallel system in AC mode:
• Turn on the line input breaker of each UPS. If using dual-input unit,
please also turn on the external bypass input breaker. After all UPSs enter
into bypass mode, measure the output voltage between two UPSs for
the same phase to make sure the phase sequence is correct. If these two
voltage differences are near to zero, that means all connections are met.
Otherwise, please check if the wirings are connected correctly.
• Turn on the output breaker of each UPS.
• Turn on each UPS in turns. After a while, the UPSs should enter into AC
mode synchronously and then, the parallel system is now complete.
5) Turn on the parallel system in Battery mode:
• Turn on the battery breaker and external output breaker of each UPS.
• Turn on any UPS. A few seconds later, the UPS will enter into battery
mode.
• Turn on the next UPS in sequence until all the UPSs enter into Battery
mode and add to the parallel system. Now the parallel system is complete.
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