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  • Users: Meinkaun
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  1. Meinkaun

    Resistvity-Zone of Measurement

    Hi,... I am using ETAP for grounding grid simulation. Very shortly, we are arranging for the resistivity tests and I have done some reading to understand these IEEE approved methods. Most of the commercially available softwares including ETAP, SKM, WinIGS have two options: 1) Two Layer Model...
  2. Meinkaun

    Inrush current based on XFMR rating

    Hi,... I am working on a basic feeder protection involving a new 10/12.5 MVA ONFA 69/13.8 KV transformer. The %Z of transformer is 6.4%. I am using ETAP for simulation. Now, When I have to input the value of inrush current, the typical value is 12 times I(full load current). Now what I am...
  3. Meinkaun

    High and Low Gr. System

    Hi, I am sure many have answered this before: Is this thubm rule or there is a logic behind this assumption: 1. Low resistance grounded system: 0-25 A 2. High resistance grounded system-25-600 A Will it be correct to say, if I limit my ground fault current to 50 A, it will be a High...

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