6 Power-On Commissioning
6.1 Checking Before Power-On
● AC power cable colors comply with local regulations.
● The input and output are not short-circuited.
● Cables and terminals are securely connected.
● Battery cables and terminals are connected correctly, and voltages comply
with industry standards.
● The UPSs are properly connected to battery strings.
● Input circuit breakers and load circuit breakers are OFF.
● Power cables and signal cables are correctly identied.
● The phase sequence of the input power is correct.
● Cables are neatly routed and securely bound according to requirements.
● Device installation and cabling facilitate subsequent system maintenance,
capacity expansion, and reconstruction.
● Parallel cables in a parallel system are properly connected.
● Devices are properly grounded.
● The voltage range of the UPS upstream input circuit breaker is 80–280 V AC
(phase voltage), and the rated frequency is 50 Hz/60 Hz.
● If the upstream input switch of the UPS is equipped with a residual current
circuit breaker, you are advised to check the leakage current before installing
the UPS. The leakage current of the UPS is less than or equal to 100 mA.
Ensure that the system leakage current does not exceed the rated value of the
upstream residual current circuit breaker after the UPS is installed. Otherwise,
the circuit breaker may trip for protection.
Example: The upstream residual current circuit breaker for the UPS has a rated
leakage current of 300 mA. The system leakage current reaches 250 mA before
UPS installation. The leakage current of the UPS is less than or equal to 100 mA.
After the UPS is installed, the leakage current of the system may be 250 mA + 100
mA > 300 mA. In this case, the upstream circuit breaker will trip for protection.
UPS2000-H-(6 kVA-10 kVA)
User Manual 6 Power-On Commissioning
Issue 03 (2023-08-20) Copyright © Huawei Digital Power Technologies Co., Ltd. 97
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