SMA SC 500CP-US Maintenance Manual - Manual (Page 28)

7 Maintenance in Disconnected State SMA America, LLC
28 SCCP-US-WH-US_en-30 Maintenance Manual
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
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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).