Connecting the Protective Grounding
Qualified person
An additional protective grounding of the inverter is required to protect from touch current in case the grounding conductor fails at the terminal of the AC cable.
The inverter features a ground connection with two connection points for protective grounding (e.g., when using a grounding electrode).
The connection points have been labeled with the following symbol: 
The required M6x12 screw with spring washer and washer is included in the scope of delivery of the inverter.
Additionally required material (not included in the scope of delivery):
1 grounding cable
1 ring terminal lug M6
1 heat-shrink tubing
Cable requirements:
Cross-section of the grounding cable if a copper cable is used: at least 10 mm²
Cross-section of the grounding cable if an aluminum cable is used: at least 16 mm²
Procedure:
- Strip the grounding cable insulation.
- Pull the heat-shrink tubing over the grounding cable. The heat-shrink tubing must be below of the stripped cable section.
- Insert the stripped section of the grounding cable into the ring terminal lug and crimp using a crimping tool.
- Pull the heat-shrink tubing onto the crimped section of the ring terminal lug and using a hot-air blower shrink them so that they are in firm contact with the ring terminal lugs.
- Plug washer and spring washer onto the hex head screw and tighten the hex head screw to one of the two connection points for additional grounding (PH3, tightening torque: 6 Nm to 7 Nm).
