UPS5000-E-(360 kVA-480 kVA)
User Manual (40 kVA Power Modules)
5 Operations
Issue 07 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
174
Procedure
Step 1
Turn off the maintenance bypass switch.
Turn the maintenance bypass circuit breaker from the ON position to the OFF position. The
maintenance bypass circuit breaker is open, and the
Maint. breaker closed
alarm is cleared
from the MDU. Check whether the system is operating in bypass mode by viewing the system
operating status on the LCD or WebUI.
Figure 5-34
Turning off the maintenance bypass switch (UPS in full configurations)
Step 2
Start the inverter.
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5.1.9 Performing EPO
After the EPO button is turned on, the UPS supplies no power and the loads shut down.
In maintenance bypass mode, the UPS continues to supply power even after the EPO
button is turned on.
Press the external EPO switch that connects to the dry contact card or remove the 4-pin
terminal on the EPO port of the dry contact card of the bypass unit.