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

Depending on how the PV power plant is designed, the automatic reconnection function has to be deactivated in the
superordinate MVPowerStation with order option "Cascade control".
Procedure:
1. Disconnect the inverter (see Section7.4, page100).
2. Disconnect the MV transformer (see Section7.5, page101).
3. Deactivate the automatic reconnection function, if the MVPowerStation has been delivered with the order option
"Cascade control".
• Turn the rotary switch on the control device to the position "On-site operation".
• Press the confirmation button and the automatic button simultaneously on the control device.
☑ The green LED OFF next to the automatic button starts glowing.
• Change the control to LOCAL in the medium-voltage switchgear (see documentation for the medium-voltage
switchgear).
4. Switch off and ground the ring circuit of the medium-voltage switchgear (see documentation for the medium-
voltage switchgear).
5. Disconnect the supply voltage of the station subdistribution (see Section7.3, page99).
6. Disconnect the MVPowerStation from the utility grid at the higher-level medium-voltage switchgear (see
documentation for the medium-voltage switchgear). Always observe the five safety rules.
7. Disconnect any additional external supply voltages.
8. Cover or isolate any adjacent live components.
7.7 Reconnecting the MVPowerStation
Depending on how the PV power plant is designed, the automatic reconnection function has to be activated in the
superordinate MVPowerStation with order option "Cascade control".
Procedure:
1. Reconnect the MVPowerStation from the utility grid at the higher-level medium-voltage switchgear (see
documentation for the medium-voltage switchgear).
2. Unground and switch on the ring circuit of the medium-voltage switchgear (see documentation for the medium-
voltage switchgear).
3. Reactivate the automatic reconnection function, if the MVPowerStation has been delivered with the order option
"Cascade control":
• Turn the rotary switch on the control device to the position "Remote operation".
• Press the confirmation button and the automatic button simultaneously on the control device.
☑ The red LED ON next to the automatic button starts glowing.
• Change the control to REMOTE in the medium-voltage switchgear (see documentation for the medium-
voltage switchgear).
4. Reconnect the supply voltage of the station subdistribution (see Section7.10, page104)
5. Reconnect any additional external supply voltages.
6. Reconnect the MV transformer (see Section7.8, page102).
7. Reconnect the inverter (see Section7.9, page103).
7.8 Reconnecting the MV Transformer
To connect the MV transformer, the medium-voltage switchgear must be switched on.
7 Disconnecting and Reconnecting
SMA Solar Technology AG
System ManualMVPS22JP-SH-en-11102