SMA SC 500CP-US Maintenance Manual - Manual (Page 44)

8 Connecting the Control Voltage SMA America, LLC
44 SCCP-US-WH-US_en-30 Maintenance Manual
5. Attach the panels to the inverter using a Torx screwdriver.
Torque: 18 in.-lbs. to 27 in.-lbs. (2 Nm to 3 Nm).
8 Connecting the Control Voltage
Requirements:
☐ The inverter is disconnected (see Section 6).
Procedure:
1. If the voltage is supplied externally, connect it.
2. Switch off the circuit breaker of the external voltage supply and
connect the internal transformer for auxiliary power supply, if
necessary.
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Electric shock due to live voltage
High voltages are present in the inverter and its components. Touching live components results in death or serious injury.
Depending on the function, some maintenance work must be carried out with voltage present.
• Wear Hazard Risk Category 2 personal protective equipment.
• Always perform work in compliance with the regulations specified in 29 CFR, Chapter XVII, Part 1910 (OSHA),
NEC, and NFPA 70E.
• Do not touch any live components in the inverter or the medium-voltage grid.
• Follow the instructions precisely.
• Observe safety messages.