UPS5000-A-400 kVA
User Manual (50 kVA, PF=0.9)
5 Operation Guide
Issue 03 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
159
Figure 5-20
Normal bypass
After you shut down the inverter, the
Bypass mode
alarm is displayed on the LCD.
Figure 5-21
Abnormal bypass
Step 3
After the inverter shuts down, turn off the external output switches.
Step 4
Open the BCB. If multiple battery strings are installed, open the main circuit breaker between
battery strings and the UPS and then open the circuit breaker for each battery string.
Step 5
Turn off the external input switches and the UPS internal switches. There are two types of
UPS internal switches:
To power off a UPS in full configuration (configured with an internal mains input switch,
internal bypass input switch, internal output switch, and internal maintenance bypass
switch), perform the following operations:
a.
Turn off the UPS internal mains and bypass input switches.
b.
Turn off the internal output switch.
c.
Turn off the external mains and bypass input switches.
d.
Open the input surge protection circuit breaker (if any) on the input PDC.