Huawei UPS5000-E Series, User Manual

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UPS5000-E-(50 kVA-300 kVA)
User Manual (50 kVA Power Modules)
5 Operations
Issue 02 (2017-02-25) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
228
5.7 Transferring to Maintenance Bypass Mode
Context

Installing a lock on the maintenance bypass switch is advised. 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 not normal, the loads may power off.
Procedure
Step 1
Transfer the UPS to the bypass mode by referring to Step 1 in 5.2 Shutting Down and
Powering Off the UPS .
Step 2
Close the maintenance bypass switch by performing the following actions according to the
UPS version being used:

For the UPS5000-E-200K-SM, rotate the handle clockwise 90 degrees (so that the
handle points downwards) as shown in
Figure 5-32 .

For the UPS5000-E-200K-FM, remove the barrier chip on the maintenance bypass
switch and close the switch, as shown in
Figure 5-33 .

For the UPS5000-E-300K-SM/SMT, rotate the handle clockwise 90 degrees (so that the
handle points leftwards) as shown in
Figure 5-34 (for the UPS5000-E-300K-SM) and
Figure 5-35 (for the UPS5000-E-300K-SMT).
The Maint. breaker closed alarm is displayed in the alarm list, as shown in Figure 5-36 . The
UPS transfers to maintenance bypass mode.