Transferring To Bypass Mode - Huawei UPS5000-E-30 kVA-FM User Manual

UPS5000-E-(30 kVA–120 kVA)-FM
User Manual
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Lithium Battery Cold Start
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4.4 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.
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greater than a certain value (single battery voltage x number of batteries in
the battery string).
Turn off the mains and bypass upstream input switches, 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 the battery strings and the UPS.
Use a multimeter to measure the positive and negative battery string voltages
at the UPS battery input terminals. 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.
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 MDU displays the initialization progress bar.
After initialization, start the inverter on the LCD.
Check that the cables between the UPS and the lithium battery cabinet are
properly connected.
Turn off the mains and bypass upstream input switches.
Power on the lithium battery cabinet. For details, see the user manual for the
lithium battery cabinet.
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.
Check that the green indicator on the battery control unit in the lithium
battery cabinet blinks at 1 Hz or is steady on. Then, 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 MDU displays the
initialization progress bar.
After the initialization is complete, start the inverter on the LCD.
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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.
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