Relay setting calculation|Restricted Earth Fault Protection relay Setting Part-1|CT selection

PART-1
CT RATIO SELECTION FOR REF RELAY SETTING

In this video we have explained calculation of CT ratio for restricted earth fault relay setting calculation. These calculations are required for successful implementation of Restricted Earth fault protection of alternator and Transformer.

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.
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The explanation given in the video is applicable for all the below mentioned topic.
1. REF Relay setting
2. Restricted Earth Fault relay setting
3. Protection
4. REF Relay setting calculation.
5. How to calculate settings for restricted earth fault relays
6. Restricted Earth Fault Protection philosophy of relay setting
2. How restricted Earth Fault Protection relay setting is done
3. REF relay setting principle
4. Differential earth fault Protection setting
5. Setting calculation of restricted Earth Fault Protection relay
6. REF relay setting
7. Restricted Earth Fault Protection CT selection
8. REF Protection of Alternator
9. REF protection of transformer

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