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Task
Make sure that the main switch of the Auxiliary service
transformer is opened.
Make sure that all the local regulations, applicable laws, and
standard are met.
Turn the earthing switch on the grid side of the MV switchgear
to the "not earthed" position.
Ask the power grid owner to connect the station to the power
grid. Wait until the station is connected to the power grid
before proceeding.
Turn the disconnecting switch on the grid side of the MV
switchgear to Closed position.
Turn the earthing switch on the MV Transformer side of the
MV switchgear to the "not earthed" position.
Turn the disconnecting switch on the MV transformer side
of the MV switchgear to the closed position.
Close the main breaker of the MV transformer.
Make sure that the voltage level on the low voltage side of
the MV transformer is correct. Adjust the MV transformer tap
settings if needed.
Run the MV transformer with no load for several hours.
Check the MV transformer for any malfunctions. Observe
the temperature, listen to audible changes, etc.
Connecting the AC cabinet
De-energize the MV transformer.
Close the main switch of the Auxiliary service transformer.
Energize the MV transformer.
Close the Auxiliary service transformer primary breaker.
Check that the Auxiliary service transformer secondary
winding voltage level is 230/400 V.
Close the Auxiliary service transformer secondary breaker.
Close the auxiliary breakers one at a time. After closing each
breaker, check the voltage values.
Close the fuse base switches of the inverter inputs one at a
time. Check each fuse base for voltage values directly in the
inverter input, before opening the next fuse base.
Follow the inverter commissioning procedure.
If any other optional equipment is integrated into the MVS such as UPS, communication
equipment and others, then check the equipment's applicable documentation before executing
the start-up procedure.
Start-up and operation 53
Additional information
Contact your local grid and MV
authority.
Applicable for C module MV
switchgear
Contact your local grid and MV
authority. Only authorized personnel
are permitted to make the connections.
Applicable for C module MV
switchgear.
Applicable for V module MV
switchgear
Applicable for V module MV
Switchgear
Applicable for V module MV
switchgear
See MV tansformer documentation
See MV transformer documentation
Also de-energize (open) all other
switches, disconnectors and breakers
of the Auxiliary service board.
Must be 230/400 V ±10%
Maintain "Closed" condition for the
auxiliary service lines with load. Only
open switches/breakers with loads.
Inverters must be de-energized.
See inverter manual.
See inverter manual.
12
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