Starting The Ups In Battery Mode; Transferring To Bypass Mode - Huawei UPS5000-A-400 kVA User Manual

UPS5000-A-400 kVA
User Manual (60 kVA, PF=0.9)
Step 2 After the inverter shuts down, open the downstream output switch.
Step 3 Open the battery string circuit breaker. If there are multiple battery strings, open the general
circuit breaker between battery strings and the UPS and then open the circuit breaker for each
battery string.
Step 4 Open the UPS mains input switch, bypass input switch, and output switch.
Step 5 Open the upstream mains input and bypass input switches.
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5.3 Starting the UPS in Battery Mode

Procedure
Step 1 Ensure that batteries have been connected properly. Use a multimeter to check that the
absolute voltages of positive and negative battery strings are greater than a certain value
(single battery voltage x number of batteries in the battery string).
Step 2 Open the upstream mains input and bypass input switches, and close the battery circuit
breaker. If there are multiple battery strings, close the circuit breaker for each battery string
and then the general circuit breaker between battery strings and the UPS.
Step 3 Use a multimeter to measure the positive and negative battery string voltages at the UPS
battery input terminal. If the absolute values of the voltages are greater than a certain value
(single battery voltage x number of batteries in the battery string), the batteries are connected
properly.
Step 4 Press and hold down the BATT START button on the bypass unit for at least 2 seconds. The
system automatically enters the battery cold start status. The LCD displays the Huawei logo
and an initialization progress bar.
Step 5 After LCD initialization, start the inverter on the LCD.
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5.4 Transferring to Bypass Mode

Before shutting down the inverter, ensure that the bypass is normal. If the bypass is not
normal, after the inverter is shut down, the UPS supplies no power, and the loads shut down.
Shut down the UPS inverter. Shut down the inverter on the LCD or WebUI, and the UPS
transfers to bypass mode.
Issue 05 (2019-12-24)
If you need to shut down the inverter and transfer the UPS to bypass mode, check that the UPS has not
generated an alarm and perform
Copyright © Huawei Technologies Co., Ltd.
Step 1.
5 Operations
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