Search FAQs
This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
What is the rated earth fault breaking current (Ief1) for medium voltage switches according to IEC 62271-103?
The rated earth fault breaking current is the maximum earth fault current in the faulted phase that the switch shall be capable of breaking at its rated voltage, when used on a non-effectively earthed neutral system.
NOTE: The maximum earth fault breaking current is 3 times the cable-and line charging current occurring in normal conditions.
This covers the most severe case, which occurs with individually screened cables.
NOTE: The maximum earth fault breaking current is 3 times the cable-and line charging current occurring in normal conditions.
This covers the most severe case, which occurs with individually screened cables.
Released for:Schneider Electric Egypt and North East Africa
Explore more
Category:
Range:
Explore more
Category:
Range:
