① Protective conductor of the power supply cord
② Protective conductor of the converter power supply cord
③ Protective conductor between PE and control cabinet
④ Protective conductor of the motor connection cable
The minimum cross-section of the protective conductors ① … ④ depends on the cross-
section of the power supply or motor connection cable:
• Power supply or motor connection cable ≤ 16mm
2
⇒ Minimum cross-section of the protective conductor = cross-section of the power supply or
motor connection cable
• 16mm² < power supply or motor connection cable ≤ 35mm
2
⇒ Minimum cross-section of the protective conductor = 16mm
2
• Power supply or motor connection cable > 35mm
2
⇒ Minimum cross-section of the protective conductor = ½ cross-section of the power supply
or motor connection cable
Application planning
4.4Requirements for the protective conductor, converter in degree of protection IP20
SINAMICS G220 converter
66 Operating Instructions, 04/2024, FW V6.2, A5E51781573B AB
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