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 M5x12 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 M5

Cable requirements:

  • Cross-section of grounding cable corresponds to the grounding conductor at the AC-GRID terminal, but at least 2.5 mm2

Procedure:

  1. Strip the grounding cable insulation.
  2. Crimp the ring terminal lug to the cable.
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  3. Tighten the screw with washer and spring washer at one of the two connection points for the additional grounding (PH2, tightening torque: 1.5 Nm).
    Overview of the Connection Area
    Connecting the Inverter to the Utility Grid