Bypass Mode; Battery Mode - Huawei UPS5000-A User Manual

UPS5000-A-(400 kVA-600 kVA)
User Manual (60 kVA, PF=0.9)
Figure 2-3 UPS conceptual diagram in normal mode

2.2.2.2 Bypass Mode

After power-on, the UPS works in bypass mode if the inverter does not start or has
been manually shut down. In normal mode, the UPS transfers to bypass mode
when it detects power unit overtemperature, overload, or other faults that may
cause the inverter to shut down. The power supply in bypass mode is not
protected by the UPS and therefore tends to be affected by the mains outage and
abnormal AC voltage waveform or frequency.
Figure 2-4 UPS conceptual diagram in bypass mode

2.2.2.3 Battery Mode

If the AC input voltage of the rectifier becomes abnormal, the UPS transfers to
battery mode. The power unit obtains DC power from batteries, which is converted
into AC output over the inverter.
Issue 06 (2022-01-27) Copyright © Huawei Technologies Co., Ltd.
2 Overview
18