Single Ups; 1+1 Parallel System - Huawei UPS5000-S User Manual

UPS5000-S-1200 kVA
User Manual
Configuration
Dual-bus system
N (N>2) 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 1+1 Parallel System

In a 1+1 parallel system, the mains input, bypass input, and AC output terminals
between cabinets are connected in parallel. Energy control modules (ECMs) on
each UPS are connected over parallel cables. The parallel connections synchronize
the UPS outputs to supply power to loads. If one UPS fails, the other UPSs
continue supplying power to loads.
Issue 08 (2020-12-15)
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.
The N bus system is used to supply power to important
loads, such as large cloud computing centers and enterprise
data centers, to ensure high reliability.
The N bus system provides N power routes. A single point of
failure does not lead to a power failure, and therefore the N
bus system provides higher reliability than that of the single-
route power supply system. The reliability of the N bus
system is slightly lower than that of the dual-bus system.
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