Single Ups; Parallel System - Huawei UPS5000-E Series User Manual

UPS5000-E-(350 kVA–800 kVA)
User Manual (50 kVA Power Modules)
Configuration
Dual-bus system

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 2-36 Conceptual diagram of an N+X parallel system
Issue 15 (2022-01-30)
Application Scenario
The dual-bus system is suitable for scenarios where high
availability requirements are posed for power supply. The
dual-bus system supplies power to important loads in large-
and medium-sized equipment rooms and data centers.
In addition to common parallel system advantages, the dual-
bus system also provides outstanding availability and
eliminates bottleneck failures. However, configuration of the
dual-bus system is complex.
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.
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