Protective Conductor - Siemens SINAMICS G120 Hardware Installation Manual

Connecting
5.1 Permissible line supplies
5.1.4

Protective conductor

Danger to life caused by high leakage currents for an interrupted protective conductor
The drive components conduct a high leakage current via the protective conductor. Touching
conductive parts when the protective conductor is interrupted can result in death or serious
injury.
● Dimension the protective conductor as stipulated in the appropriate regulations.
Dimensioning the protective conductor
Observe the local regulations for protective conductors subject to an increased leakage current
at the site of operation.
①
②
③
④
The minimum cross-section of the protective conductor
of the line or motor feeder cable:
● Line or motor feeder cable ≤ 16 mm
⇒ Minimum cross-section of the protective conductor = cross-section of the line or motor
feeder cable
● 16 mm² < line or motor feeder cable ≤ 35 mm
⇒ Minimum cross-section of the protective conductor = 16 mm
● Line or motor feeder cable > 35 mm
⇒ Minimum cross-section of the protective conductor = ½ cross-section of the line or motor
feeder cable
44
WARNING
Protective conductor for line feeder cables
Protective conductor for inverter line feeder cables
Protective conductor between PE and the electrical cabinet
Protective conductor for motor feeder cables
① ④
...
2
2
2
Power Module PM230, IP20 / Push-through technology (PT)
Hardware Installation Manual, 08/2016, A5E34331322B AB
depends on the cross-section
2