What is the restricted earth fault protection and why we use it?

Question added by ayman abdelrahem ahmed ahmed , Maintenance and Electrical Testing Engineer , الشركة المصرية لنقل الكهرباء
Date Posted: 2014/02/02

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we use it to protect the busduct from CT to LV panel, where it will detect the current coming back to the CT the the nutral.

Mechanism: the relay will calculate the current coming to LV panel and out, where the net should be ZERO.

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