IDMT and Buchholz Relay

A) IDMT relay are mostly used for protection against?
1) Earth Fault 2) Inter turn fault 3) Overloading 4) None of the above
B) Which device is provided as backup of buchholz relay?
C) Name any two devices used for protection of power transformer against internal faults?

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  • Oct 25th, 2015

A) IDMT relay is mostly used for the protection against overloading
B & C) REF & differential protections are used to protect the power transformer from internal faults and one of this both protections may used for backup of Buchholz relay.

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