SMA MEDIUM VOLTAGE POWER STATION 500SC-JP - Disconnecting the MV Transformer; Disconnecting the MV Power Station

2. If the supply voltage is also to be disconnected downstream from the supply voltage circuit breaker, switch the
external circuit breaker of the supply voltage off.
Tip: The external circuit breaker of the supply voltage is usually located in a subordinate distribution station.
3. Disconnect any additional external voltage.
4. Switch off the circuit breaker of the grid monitoring.
5. Open the measurement and disconnect terminals.
6. Ensure that no voltage is present.
7. Cover or isolate any adjacent live components.
7.5 Disconnecting the MV Transformer
Connect and disconnect the AC voltage of the MV transformer
Only a duly authorized person is allowed to connect and disconnect the AC voltage of the MV transformer.
Requirement:
☐ The inverters must be switched off (see Section7.4.1, page100).
Procedure:
1. Switch off the transformer panel of the medium-voltage switchgear (see documentation for the medium-voltage
switchgear).
2. Ground the transformer panel (see documentation for the medium-voltage switchgear).
3. Connect the grounding and short-circuiting equipment to the AC busbars of the inverter.
4. Attach magnetic signs indicating the name of the duly authorized person to the transformer panel.
5. Disconnect any additional external voltage.
6. Cover or isolate any adjacent live components.
7.6 Disconnecting the MVPowerStation
Only when the entire MVPowerStation has been disconnected will you be able to work on the devices of the
MVPowerStation without risk.
7 Disconnecting and Reconnecting
SMA Solar Technology AG
System Manual 101MVPS22JP-SH-en-11