Huawei UPS5000-H-600 User Manual page 149

UPS5000-H-600 kVA-FTN
User Manual (Singapore, 100 kVA Power Modules)
Step 9 Clear the EPO state of each UPS. For details, see
Step 10 Measure the output voltage of each UPS.
1.
2.
Step 11 Turn on the external output power switch for each UPS.
Check that no alarm is generated for any UPS, and then turn on the external
output power switch for each UPS.
Ensure that the output switch on each UPS is ON and the load switch is OFF.
Step 12 Tap Paral. Inv. ON on the LCD screen Common Functions. The system transfers
to inverter mode.
Step 13 Connect batteries to the parallel system.
1.
2.
3.
Issue 02 (2023-11-07)
operations. If the phase sequence is incorrect or the voltage difference for a
phase between any two UPSs is greater than 5 V, power off the parallel
system completely, and check whether the bypass input cables for the UPS
parallel system are properly connected.
CA UTION
Exercise caution when performing operations with power on. There are many
electrified parts in the UPS wiring area. It is recommended that the test be
performed in the external power distribution area of the UPS.
Check that no Bypass abnormal alarm is generated for any UPS in the
system. Then, all UPSs in the system supply power in bypass mode.
Set the multimeter to the AC voltage position, connect the red probe to UPS 1
output phase A, and connect the black probe to UPS 2 output phase A to
measure the output voltage difference between UPSs. Perform the same
operations on phases B and C. Complete the measurement between every
two UPSs in the parallel system. If the phase sequence is correct and the
voltage difference is less than 5 V, perform the subsequent operations. If the
phase sequence is incorrect or the voltage difference for a phase between any
two UPSs is greater than 5 V, power off the parallel system completely, and
check whether the output cables for the UPS parallel system are properly
connected.
CA UTION
Exercise caution when performing operations with power on. There are many
electrified parts in the UPS wiring area. It is recommended that the test be
performed in the external power distribution area of the UPS.
Check that no alarm except the No battery alarm is displayed on the LCD of
each UPS.
Turn on the battery input switch for each UPS. (If there are multiple battery
strings, turn on the switch of each battery string first, and then turn on the
general switch between the battery strings and the UPS.)
Use a multimeter to measure the voltage where the battery switch is located
(if there are multiple battery strings, use a multimeter to measure the voltage
Copyright © Huawei Digital Power Technologies Co., Ltd.
6 Parallel System Commissioning
9.5 Clearing the EPO State.
141