what is relay type VDG,CDG,VTT ect?



what is relay type VDG,CDG,VTT ect?..

Answer / k.prakashchandra

Generally V =voltage ,D = disc type ,G =IDMT ,T= trip
circuit ,C= current.Hence VDG may be under/over voltage disc
operated IDMTL relay.CDG similarly current relay.VTT could
be voltage operated trip circuit supervision relay.

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