Protective earth
The protective earth is established via the left-hand grounding bolt on the regenerative unit and the mounting plate on the control cabinet. The connection is made via a cable with a ring-shaped cable lug [1]. Use a cable with a cross-section of at least 10 mm2 for a protective conductor.
Optionally, an additional protective earth can be attached via the right-hand grounding bolt of the last regenerative unit.
- ►Make up a cable with a ring-shaped cable lug and a cross-section of at least 10 mm²
- ►Plug the cable with the cable lug [1] onto the left-hand grounding bolt [2] of the first module in the group
- ►Place nut [3] on the grounding bolt [2] on top of the cable lug [4] and screw it tight
- ►Do not use a spring washer [5]
- ►Observe tightening torques:
|
Components |
Tightening torque [Nm] |
|---|---|
|
Serrated hexagonal nut |
2.7 |
- ►Attach the ready-made cable properly to the control cabinet mounting plate. Clean the contact surfaces prior to the assembly and ensure that the mounting plate is not painted.