Huawei UPS5000-H User Manual page 27

UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Modules)
Parallel System
In a parallel system, mains input, bypass input, and AC output terminals of UPSs
are connected in parallel. ECMs on different UPSs are connected over parallel
cables to synchronize UPS outputs to supply power to loads. If one UPS fails,
another UPS continues supplying power to loads, which ensures system reliability.
Figure 2-2 Typical application scenario of 1+1 parallel system
Dual-Bus System
A dual-bus system consists of two independent UPS systems. Each UPS system
consists of one UPS or multiple UPSs connected in parallel. Of the two UPS
systems, one is the master system and the other is the slave system. The dual-bus
system is highly reliable and is suitable for loads with multiple input terminals.
You can install an optional static transfer switch (STS) to start a bus
synchronization controller (BSC) provided in standard configuration. The UPS
systems work in inverter mode or bypass mode.
Issue 03 (2021-08-03) Copyright © Huawei Technologies Co., Ltd.
2 Product Overview
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