UPS5000-H-1200 kVA
User Manual (100 kVA Power Modules)
5 Operations
Issue 01 (2020-07-15)
Copyright © Huawei Technologies Co., Ltd.
142
Step 2
Turn off the mains and bypass input switches in the external input PDC.
Step 3
Power on the lithium battery cabinet by referring to the lithium battery cabinet manual.
Step 4
Use a multimeter to measure the voltages of the positive and negative battery strings
connected to the UPS battery input terminals. If the measured values are consistent with the
voltages displayed on the
System Status
screen of the lithium battery cabinet, the batteries
are properly connected.
Step 5
When the green indicator on the battery control unit in the lithium battery cabinet blinks at 1
Hz or is steady on, press and hold down the
BATT START
button on the UPS bypass control
module for more than 2 seconds. The system automatically enters the battery cold start state.
The MDU displays the Huawei logo and an initialization progress bar.
Step 6
After the MDU initialization is complete, start the inverter.
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5.4 Transferring to Bypass Mode Manually
Before you shut down the inverter, ensure that the bypass is normal. If the bypass is abnormal,
after you shut down the inverter, the UPS supplies no power, and the loads are powered off.
Shut down the inverter on the LCD or WebUI. The UPS automatically transfers to bypass
mode.
If you shut down the inverter when the bypass input voltage or frequency exceeds the specified
threshold, the UPS supplies no power, and the loads are powered off.
5.5 Setting ECO Mode
Prerequisites
The UPS is working in inverter mode.
Context
The UPS is set to non-ECO mode by default. Set the UPS to ECO mode when it is
required.
In ECO mode, the bypass takes priority over the inverter in supplying power. If the
bypass fails, the UPS transfers to inverter mode.
Both a single UPS and a parallel system support ECO mode which ensures a higher
efficiency.
To avoid frequent transfers between ECO mode and normal mode, do not set ECO mode
when the bypass input is unstable or is sensitive to load changes.
ECO mode is not recommended when the load is less than 10%.