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  1. comuniti

    insulation resistance test with connections on the relay

    Dear all. I have few doubts regarding Insulation resistance testing... - if we do IR test on current or voltage circuit which is completely connected (meaning CT/VT connections are done from the CT/VT and all up to the analog inputs of the protection relay) and if we do IR test with 500 V, is it...
  2. comuniti

    Transformer diff protection connection

    Hi all, I found some old drawings which include TR diff protection (please see attached picture). CT1, CT2, CT3 are connected to Differential relay and CT4 is used for meters (each CT has more cores, but to be easier I shown only that for diff prot.). This connection is a little bit confusing...

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