SMA SC 500CP-US - Manual (Page 88)

14 Disconnecting the Inverter SMA America, LLC
88 SCCP-US-IA-US_en-41 Installation Manual
5. Externally disconnect the AC voltage of the medium-voltage transformer.
6. If no DC Switch is present, disconnect the external AC/DC Disconnect unit.
7. Disconnect the DC voltage in the main distribution or the sub-distribution.
8. If an internal AC Disconnect is present, open the flap of the AC Disconnect and switch the AC Disconnect off.
9. Disconnect the external supply voltage externally.
10. If applicable, disconnect any additional external voltage.
11. Open the door of the interface cabinet.
12. Switch off supply voltage:
• If the supply voltage is supplied externally, switch off the circuit
breaker of the external voltage supply in the inverter.
or
• If the supply voltage is supplied internally, switch off the circuit
breaker of the internal voltage supply in the inverter.
13. Switch off the circuit breaker of the grid monitoring.
14. Disconnect the circuit breaker of the 24 V circuits.