UPS5000-S-1200 kVA
User Manual
2 Overview
Issue 04 (2019-06-25)
Copyright © Huawei Technologies Co., Ltd.
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2.2.2.3 Battery Mode
If the mains input is abnormal or the rectifier becomes abnormal, the UPS transfers to battery
mode. The power module obtains DC power from batteries, and the power is converted into
AC output by the inverter.
Figure 2-5
UPS conceptual diagram in battery mode
2.2.2.4 Maintenance Bypass Mode
The maintenance bypass unit has been installed. When the UPS works in maintenance bypass
mode, the current flows through the maintenance bypass instead of the power module. You
can maintain the circuit inside the cabinet.