Single Ups; Dual-Bus System - Huawei UPS5000-E Series User Manual

UPS5000-E-(25 kVA-125 kVA)
User Manual (25 kVA power modules)
Table 2-9 Typical configurations

2.5.1 Single UPS

The UPS5000-E has a modular structure. Its power modules are connected in parallel to
deliver a high loading capability. If a single power module develops a fault, the other power
modules continue working. So long as the load is not too large, this redundant capacity can
continue to provide power and therefore helps ensure reliability.
conceptual diagram of a single UPS.

2.5.2 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.
shows the conceptual diagram of a dual-bus system.
Issue 06 (2020-01-10)
Function
Single UPS
Dual-bus system
Copyright © Huawei Technologies Co., Ltd.
Application Scenario
A single UPS5000-E is applicable to scenarios with light loads. Its
power will be redundant when loads are light as it adopts modular
design.
The dual-bus system is suitable for scenarios where highly reliable
power supply is required. The dual-bus system supplies power to
important loads in large- and medium-sized equipment rooms and
data centers. The dual-bus system is highly reliable, but its
configuration is complex.
2 Overview
Figure 2-2 shows the
Figure 2-18
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