NO TE
A 1+1 parallel system is a typical configuration. You can set the number of requisite UPSs
and redundant ones on the LCD or WebUI.
2.4.1 Single UPS
This series uses a modular design in which multiple power modules are connected
in parallel to deliver a high loading capacity. If a single power module is faulty, the
other power modules continue working. When the load power is small, even a
single UPS can provide redundant capacity, which ensures high reliability.
2.4.2 Parallel System
In a parallel system, mains input, bypass input, and AC output terminals of UPSs
are connected in parallel, separately. Energy control modules (ECMs) on different
UPSs are connected over parallel cables to synchronize UPS outputs to supply
power to loads. If one UPS fails, the other UPSs continue supplying power to
loads.
Figure 2-24 Conceptual diagram of an N+X parallel system
2.4.3 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. Of the two
UPS systems, one 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.
UPS5000-E-(30 kVA–120 kVA)-FM
User Manual
2 Overview
Issue 03 (2022-01-30)
Copyright © Huawei Technologies Co., Ltd.
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