UPS5000-A-500 kVA
User Manual (e-shelter)
5 Operations
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
148
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 voltage
of a battery string is 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 check that the voltage of battery strings at the UPS battery input terminal
is greater than a certain value (single battery voltage x number of batteries in the battery
string), which indicates that the batteries are connected properly.
Step 4
Press and 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 LCD displays the Huawei
logo and an initialization progress bar.
Step 5
After LCD initialization, start the inverter.
----End
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.
If the inverter is shut down when the input voltage or frequency exceeds the specified threshold, the
UPS supplies no power, and the loads shut down.
5.5 Setting ECO Mode
Context
The UPS is set to non-ECO mode by default. Set the UPS to ECO mode when energy
saving is required.
In ECO mode, the bypass takes priority over the inverter in supplying power. If the
bypass is disconnected, the UPS transfers to normal mode. The transfer time is less than
4 ms under typical working conditions and less than 20 ms under poor working
conditions.
Both a single UPS and the parallel system support the ECO mode for higher efficiency.