Connect the power line in accordance with EN 60204.

Provide a permanent connection in accordance with DIN EN 50178, as the leakage current is large than 3.5 mA.

If a fault current protection switch is to be used:

Use a type B fault current protection switch.

This is intended for operation with frequency converters and distinguishes between residual currents in different frequency ranges. This prevents triggering by leakage currents.