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Recent content by Khalid1970

  1. Khalid1970

    15 % Transformer Impedance Limitations

    Timmy For the voltage regulation, capacitor banks for the PF correction can help. This issue is discussed as well in the article I put in my reply to your same related thread of today
  2. Khalid1970

    step-up transformer neutral grounding

    Your selection is not OK as I faced this problem before (dY Transformer was the best choice). Now you should ground the generator neutral only and not the Y side of transformer as this will lead to current circulation of the harmonics generated by the generator due to the pitching. Second...
  3. Khalid1970

    Feeder Reactor

    Series reactors used to limit fault current. Various combination for reactors can be applied such as feeders, coupler, etc... I have read an article before by trench (manufacturer) about this issue and it contains a lot of...
  4. Khalid1970

    Determine the momentary dc load

    Hello Gents, Nobody contributed, may be the question is not clear enough. The situation is that we are having 11KV Switchgear (29 breakers) and 132 KV GIS ( 13 bays). Tripping DC is a stand alone while we are having another DC for the control. The continuous load is known and my problem is...
  5. Khalid1970

    Determine the momentary dc load

    Hi, For sizing of DC system of 132/11 KV SS, how to compute the 1 minute DC load required for tripping (how many breakers to be assumed tripping simultaneously). What is the criteria to be followed. Also, should we add to this the closing coil load or choose the. Highest of the two. Thanks.

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