Reconnecting The Mv Power Station; Reconnecting The Mv Transformer - SMA MEDIUM VOLTAGE POWER STATION 500SC-JP System Manual

7 Disconnecting and Reconnecting
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.
102 MVPS22JP-SH-en-11
SMA Solar Technology AG
System Manual