Dual-Bus System - Huawei UPS5000-E Series User Manual

UPS5000-E-(20 kVA-160 kVA)
User Manual (Low voltage)
Figure 2-19 Conceptual diagram of an 1+1 parallel system

2.5.3 Dual-Bus System

A dual-bus system consists of two independent UPS systems. Each of these UPS systems in
turn consists of one or more UPSs connected in parallel. The dual-bus system is highly
reliable and is suitable for loads with multiple input terminals. You can install a static transfer
switch (STS) to start the bus synchronization controller (BSC), while the STS is optional, and
the BSC is a standard configuration. Of the two UPS systems, one is a master system, and the
other is a slave system. The UPS systems work in normal mode or bypass mode. .
Issue 03 (2020-04-27) Copyright © Huawei Technologies Co., Ltd.
2 Overview
35