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  • Users: Gonenc
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  1. Gonenc

    Zigzag Grounding Transformer-ETAP

    Hi; I am trying to enter related information to zigzag grounding transformer on ETAP. Our transformer information are below. BUT, when I enter 18,2 ohm/phase to Impedance OHM subtitles, phase to ground current is limit to much. As much as I read, zero sequence of zigzag transformer should be...
  2. Gonenc

    Short Circuit Withstand Capacity of LV Panelboards (Arc Flash Calculation)

    Hi Everyone; I have two question about arc flash analysis; 1- I am doing arc flash analysis for one of our customer. I would like to learn how can we assume short circuit capacity of low voltage switchboard. There is no information on the related project and those switchboard are really old...
  3. Gonenc

    Interesting IT System Protection and 59N

    Hi Everyone, I have isolated system which has 154kv/10.5kv YN/D transformer. I have to do protection for delta side of this system. In case of earth fault, I know that I can not protect my system with current. I should use 59N protection. In case of earth fault in any bus in our system...

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