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Simple Calculations will furnish base current and extend current capability for identified transformers as well as maximum short circuit current based on infinite MVA at transformer pirmary. Detailed Calculations will provide base load current and short circuit currents for identified transformers considering primary MVA and impedance details for transformer and Utility.

Transformer Tables will provide based and extend rating currents for various sizes and types of transformers.

Software:GE Transformer And Short Circuit Calculator (MS Excel spreadsheet)
Developer:General Electric
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GE Transformer And Short Circuit Calculator (MS Excel spreadsheet)

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Page edited by E.C. (Google).


  1. Nayeem
    Aug 03, 2015

    Dear Admin,

    I am not able to download the above Spreadsheet.. Please advise how can I get it.

    Thank You.

  2. amr
    Feb 01, 2014

    thank you very much

  3. makoy
    Apr 29, 2013

    need external reference

  4. nasermolki
    Apr 18, 2013

    thanks for your very useful website , I learn so much thing here and find answers of many questions
    but it is more than a month that i can’t download anything , is it something wrong about your site or it is my computer problem ?

  5. quang
    Jan 10, 2011

    GE Transformer And Short Circuit Calculator (MS Excel spreadsheet)

      Jul 08, 2013

      I have a query about On load tap changer employed for power transformer. I worked with MR make OLTC’s diverter switch and loading resistors for tape winding. As my understanding the diverter switch changes the polarity of windings that needs to be added to get voltage addition and subtraction. But, I believe that there are Unidirectional & Bidirectional OLTCs based on charging of transformer practiced either in both way(HV/LV for step up and step down) or only one way ( Either Step up or step down) as a understand.But,my doubt is a transformer can be used either for step up or down, But why the OLTCs are classified as unidirectional and bidirectional. Please give me detail clarification on it.

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