Maintenance In Disconnected State; Safety - SMA SUNNY CENTRAL 500CP-US/CA Maintenance Manual

7 Maintenance in Disconnected State
14. Disconnect the circuit breaker of the 24 V circuits.
15. Open the test and disconnect terminals.
16. Ensure that all poles are free of voltage.
17. Ground and short-circuit the inverter.
18. Cover or shield any adjacent live components.
19. Unscrew the protective cover over the fuses.
20. Remove all DC fuses from all DC fuse holders. Use a suitable tool or safety gloves.

7 Maintenance in Disconnected State

7.1 Safety

Danger to life due to electric shock
High voltages that can result in lethal electrical shocks are present in the live components of the inverter.
• All work must be carried out in accordance with this document.
• Do not touch any live components in the inverter or on the medium-voltage grid. Comply with all applicable safety
regulations for handling medium-voltage grids.
• After disconnection, wait at least 15 minutes until the capacitors have discharged.
• Follow all safety precautions (see Section 2.2).
• Disconnect the inverter (see Section 6).
28 SCCP-US-WH-US_en-31
SMA America, LLC
Maintenance Manual