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  • Users: trbartlett
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  1. trbartlett

    CT parameters

    Hello all, I do not have manufacturers (South Wales Electric??)information on diff cts 2.5P30 F20 (600:2.89). I cannot find rated burden (ohms or VA) on nameplate of switchgear - cannot access HV cabinet to check ct's themselves. I want to work out actual ALF - am i completely stuck not having...
  2. trbartlett

    CT - Measurement + post "CT Sizing" 10/02/10 by jwparker

    I have some questions around the same guys... Retrofitting power monitoring to a sub-station which only has protection ct's fitted. It has been decided that 3 measurment ct's will be installed. Substation 66/11kV. Going on tx size, 400Amps seems to be max constant secondary. Protection CT's are...
  3. trbartlett

    HV transformer - neutral earthing resistor

    I have been told and have no reason to disbelieve that transformers above MV (in my country, 33kV)do not normally have NER's. I have been told that it has something to do with insulation and that it would make the manufacture of a high voltage transformer (i.e. 132/66kV 100Mva)cost prohibitive...

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