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Grounding Question No.16 – NGR protection

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  • #298
    bipul pandey

      i want to know how do u calculate the ohmic resistance value of ngr for transformer protection,say if i do provide u primary seconday voltage ,current of transformer.

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    • #1579
      Hamid

        Please refer to basic conseption and application of grounding systems in reference documents such as IEEE665 ,IEEE142 and BS 7430 , also you can refer to Machine Riddle No.5 and Grounding Riddle No.7 for some design criteria consideration.

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