Requirements For The Protective Conductor - Siemens SINAMICS G120 Hardware Installation Manual

5.2

Requirements for the protective conductor

Overview
A high leakage current flows through the protective conductor in converter operation. The
protective conductor of the converter must not be interrupted for safe touch protection in
converter operation.
This primarily results in requirements for the minimum conductor cross-section of the protective
conductor.
No restriction applies to the length of the protective conductor for touch protection. However,
short protective conductors are advantageous for EMC-compliant installation.
Description
Electric shock due to 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.
• Comply with the requirements for the protective conductor.
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②
③
④
PM250 Power Module
Hardware Installation Manual, 04/2021, A5E36265179B-AB
WARNING
Protective conductor for line feeder cables
Protective conductor for converter line feeder cables
Protective conductor between PE and the control cabinet
Protective conductor for motor feeder cables
5.2 Requirements for the protective conductor
Connection
37