Additional information
Task
Close the disconnecting devices between the
solar generator and DC input terminals of the in-
verter.
Check that there is sufficient light for the inverters
to be able to feed power to the AC power system
(grid).
Make sure that the inverters operate correctly.
See PVS980 hardware manual
(3AXD50000026013 [EN]).
Measure the DC supply voltage at each input
terminal of the inverter to verify that the polarity
and voltage range conforms to the specifications
of the inverter.
See PVS980 hardware manual
(3AXD50000026013 [EN]).
Close the DC disconnectors of the first inverter
[PVS1].
Repeat the above commissioning tasks for the
second inverter [PVS2].
Make sure that the inverters detect the fault indic-
ations and trip accordingly.
Simulate MV transformer faults (unpowered).
See the project specific circuit diagrams that came
with the PVS980-CS.
Make sure that the inverters and/or the SCADA
system detects the signals.
Simulate MV monitoring status signals (un-
powered).
See the project specific circuit diagrams that came
with the PVS980-CS.
Connecting the PVS980-CS to the power grid
See PVS980 hardware manual
(3AXD50000026013 [EN]).
Make sure that AC disconnectors of both inverters
are open.
Contact your local grid and MV authority.
Make sure that all the local regulations, applicable
laws, and standards required by the local power
grid are met.
Applicable for C module MV switchgear
Turn the earthing switch on the grid side of the
MV switchgear to the “not earthed” position.
Contact your local grid and MV
authority. Only authorized personnel are permitted
to make the connections.
Ask the power grid owner to connect the station
to the power grid. Wait until the station is connec-
ted to the power grid before proceeding.
Applicable for C module MV switchgear.
Turn the disconnecting switch on the grid side of
the MV switchgear to Closed position.
Applicable for V module MV switchgear
Turn the earthing switch on the MV transformer
side of the MV switchgear to the “not earthed”
position.
Applicable for V module MV Switchgear
Turn the disconnecting switch on the MV trans-
former side of the MV switchgear to the closed
position.
Applicable for V module MV switchgear
Close the main breaker of the MV transformer.
Check that MV transformer is de-energized before
adjusting the tap settings.
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.
See MV tansformer documentation.
Run the MV transformer without load for several
hours.
See MV transformer documentation.
Check the MV transformer for any malfunctions.
Observe the temperature, listen to audible
changes, etc.
Connecting the inverters to AC supply
Start-up and operation 49
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