Huawei UPS5000-E-30 kVA - Cold-Starting the UPS Using Batteries

Figure 5-3 Bypass fault
NO TE
To shut down the inverter and transfer the system to bypass mode, check that the UPS has
not generated an alarm and perform Step 1.
Step 2 After the inverter shuts down, switch o the UPS output circuit breaker QF3.
Step 3 Switch o the battery string circuit breaker. If there are multiple battery strings,
switch
o the general circuit breaker between battery strings and the UPS and
then switch o the circuit breaker for each battery string.
Step 4 Switch o the UPS input circuit breaker QF1.
Step 5 Switch o the input circuit breaker QF.
----End
5.4 Cold-Starting the UPS Using Batteries
Lead-Acid Battery Cold Start
Step 1 Check that batteries are properly connected. Use a multimeter to measure the
voltage of the entire battery string. The value should be greater than the specied
value (Voltage of a single battery x Number of batteries in the battery string).
Step 2 Switch o the UPS input circuit breaker QF1 and switch on the battery circuit
breaker. If there are multiple battery strings, switch on 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 voltage between the positive and negative
battery strings connected to the UPS battery terminals. If the voltage of the entire
battery string is greater than the
specied value (Voltage of a single battery x
Number of batteries in the battery string), the batteries are connected properly.
Step 4 Hold down the BATT START button on the bypass module for at least 2 seconds.
The system automatically enters the battery cold start status. The MDU displays
the initialization progress bar.
Step 5 After the MDU initialization is complete, start the inverter.
----End
UPS5000-E-(30 kVA–180 kVA)
User Manual (Integrated UPS) 5 Operations
Issue 02 (2022-12-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 131