Bypass Mode; Battery Mode - Huawei UPS5000-H-400 kVA User Manual

UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Module)
Figure 2-5 UPS conceptual diagram in normal mode

2.5.2 Bypass Mode

When the UPS detects that the power module experiences overtemperature,
overload, or other faults that may shut down the inverter, the UPS automatically
transfers to bypass mode. At the same time, the rectifier is started and charges
batteries over a charger. In bypass mode, loads are powered by the bypass
module. The bypass power supply is not protected by the UPS and therefore is
prone to the mains outage, abnormal AC voltage waveform, or abnormal
frequency.
Figure 2-6 UPS conceptual diagram in bypass mode

2.5.3 Battery Mode

If the mains input is abnormal or the rectifier becomes abnormal, the UPS
transfers to battery mode. The power module obtains energy from batteries, and
the energy is converted into AC output by the inverter.
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