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Protection Riddle No.81 – Frequency of surges and impulses

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  • #672
    Sinnadurai Sripadmanaban

      What are the frequencies(HZ) of surges/impulses including lightening and switching which travels along transmission lines and pass to ground via SPDs?
      What are the frequencies(HZ) of surges/impulses including lightening and switching which travels along transmission lines and pass to ground via SPDs?

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    • #2375
      Hamid

        From measurements made on communication lines and on utility power lines, both outside and within structures,

        #2378
        Jagadish subbaramaiah

          In addition a detailed explanation given by Mr. Hamid, IEC 60071-4 Document on Insulation coordination can be referred for more details

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