UPS5000-S-1200 kVA
User Manual
2 Overview
Issue 04 (2019-06-25)
Copyright © Huawei Technologies Co., Ltd.
36
Figure 2-25
1+1 parallel system schematic diagram
2.4.3 Single UPS Dual-Bus System
The dual-bus system consists of two independent 1.2 MW systems. Each 1.2 MW system
consists of one or two 1.2 MW UPS systems. One of the two UPS systems is a master system,
and the other is a slave system. This design makes the dual-bus system highly reliable and
suitable for loads with multiple input terminals. An optional static transfer switch (STS) can
be installed to start the bus synchronization controller (BSC). The UPS systems work in
normal mode or bypass mode. The conceptual diagram uses a dual-bus system with a single
UPS as an example.