Transferring To Maintenance Bypass Mode - Huawei UPS5000-S Series User Manual

UPS5000-S-(350 kVA-800 kVA) User Manual
User Manual

5.7 Transferring to Maintenance Bypass Mode

Context
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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. Figure 5-19 and Figure 5-20 shows
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 Figure 5-21 and
Figure 5-22.
The Maint. breaker closed alarm is displayed in the alarm list, as shown in Figure 5-23. The
UPS transfers to maintenance bypass mode.
Figure 5-19 Locked maintenance bypass switch (400 kVA UPS and 500 kVA UPS)
Issue 05 (2019-02-27)
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.
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