Restricted Earth Fault Protection|REF relay working principle

In this video the philosophy behind the restricted Earth Fault Protection has been elaborated. Restricted Earth Fault Protection is also known as differential earth fault protection. It is basically earth fault protection but works on differential relay principle.
Restricted Earth Fault Protection is used to detect earth fault inside a machine in general.

The explanation given in the video is applicable for all the below mentioned topic.
1. Restricted Earth Fault Protection philosophy
2. How restricted Earth Fault Protection works
3. REF principle
4. Differential earth fault Protection
5. working principle of restricted Earth Fault Protection relay
6. REF relay
7. Restricted Earth Fault Protection theory
8. REF Protection

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#RestrictedEarthFaultProtection
#REF
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Видео Restricted Earth Fault Protection|REF relay working principle канала ELECTRICAL TECHNOLOGY and INDUSTRIAL PRACTICE