Requirements For The Protective Conductor - Siemens SINAMICS G120 Installation Manual

Connecting
4.1 Permissible line supplies
4.1.4

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.
①
②
③
④
50
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
Hardware Installation Manual, 01/2020, A5E33294624B AL
Power Module PM240-2