Standby earth fault protection 1

[mokwadi]

How are current transformers and the relay connected for a standby earth fault protection scheme?

 

[RalphChristie]

I haven't seen standby schemes on solidly grounded transformers before, thanks for the correction. Lesson learned!

Raghun:

Remember, on a delta/star transformer, an earth-fault current on the secondary side is seen as a phase-phase fault on the primary side.

Thanks

Regards
Ralph

[red]Failure seldom stops us, it is the fear for failure that stops us - Jack Lemmon[/red]

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