Transferring From Maintenance Bypass Mode To Normal Mode; Performing Epo - Huawei UPS5000-E Series User Manual

UPS5000-E-(350 kVA–800 kVA)
User Manual (50 kVA Power Modules)
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4.8 Transferring from Maintenance Bypass Mode to
Normal Mode
Context
Before transferring the UPS from maintenance bypass mode to inverter mode,
ensure that the bypass input and output are normal.
Procedure
Step 1 Turn off the maintenance bypass switch.
The Maint. breaker closed alarm disappears from the alarm list. View the system
running diagram on the LCD or WebUI to check whether the system works in
bypass mode.
Step 2 Start UPS inverters.
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4.9 Performing EPO

● After the EPO button is turned on, the UPS supplies no power and the loads
● In maintenance bypass mode, the UPS continues to supply power even after
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.
Issue 15 (2022-01-30)
NO TE
After the system transfers to maintenance bypass mode, the Maint. breaker closed and
Bypass mode alarms are displayed on the LCD.
NO TICE
NO TE
Reinstall the stopper or barrier on the maintenance bypass switch if any.
NO TICE
shut down.
the EPO button is turned on.
Copyright © Huawei Technologies Co., Ltd.
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