UPS5000-E-(350 kVA-800 kVA)
User Manual (50 kVA Power Modules)
5 Operations
Issue 05 (2018-01-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
258
Figure 5-24
Logs
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5.7 Transferring to Maintenance Bypass Mode
Context
You are advised to install a lock on the maintenance bypass switch. The lock core has a
diameter of 5–10 mm.
Strictly observe the following procedure to transfer the UPS to maintenance bypass mode.
Otherwise, loads may power off.
In maintenance bypass mode, the mains supplies power to the loads directly over the
maintenance bypass. If the mains is abnormal, the loads may power off.
Procedure
Step 1
Manually switch the UPS to bypass mode.
Step 2
Close the maintenance bypass switch.
If the maintenance bypass switch is locked, unlock it first.
a locked maintenance bypass switch. After you close the maintenance bypass switch, the UPS
transfers to maintenance bypass mode. The maintenance bypass switch is OFF by default. To
close the maintenance bypass switch, rotate it to the ON position, as shown in
The
Maint. breaker closed
alarm is displayed in the alarm list, as shown in
. The
UPS transfers to maintenance bypass mode.