Installation | Grounding
Doc. No. 982056, Version 01, SelectSun 40K
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WARNING
Electrical shock and/or fire
Before making any other connection, you must connect the secondary
ground stud (Protective Earth) to the system ground terminal. This is a
mandatory connection.
To avoid electrical shock and/or fire caused by high discharge current,
establish a ground connection before connecting the inverter to the supply
circuit.
4.8
Grounding
DANGER
Danger to life from electric shock!
The inverter must be earthed with the grounding bolt, otherwise a potential
difference can build up, causing a risk of electric shock!
The inverter features a
threaded bolt at the left bottom side for additional grounding. Grounding is intended
to ensure optimum overvoltage protection. The cross section for the ground must be 16 mm² (AWG 5) for
copper and 25 mm² (AWG 3) for aluminum. Depending on the function and use of the additional ground wire
other wire sizes may be required depending on the local regulation.
The maximum permissible torque for the grounding screw is 10 Nm (7 ft lbs).
Fig. 10: Grounding bolt
4.9
Residual Current Protection
Note:
The photovoltaic power supply inverters without transformers meet the fault
protection requirements according to IEC 60364-7-712 and CEI 64-8/7 can
be operated with a type A residual-current circuit breaker.
The rated leakage current should be at least 300 mA per inverter.
M8 grounding bolt
