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Calculate fault current

This MS Excel Spreadsheet represents an easy way to calculate fault current by entering few values in indicated fields. You will find sheet with very nice example already fulfilled. Before starting fault current calculation, you will have to choose between Step 1a and Step 1b which are explained below.

Available fault current spreadsheet
Available fault current spreadsheet

Step 1a

Insert available fault current ampere rating from your local Utility.

Step 1b

Insert the the kVA rating power factor (PF) and impedance  (Z) of the transformer is not required to continue. Note: When you insert the kVA rating  power factor and impedance you must select the voltage from the dropdown box Select Voltage & Phase before the value will be calculated.

Software:Fault Current Calculation (MS Excel Spreadsheet)
Developer:John Sokolik
Size:207 KB
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Fault Current Calculation Spreadsheet

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  1. gebre
    Jun 27, 2023

    please we need this Excel should be free for African and Asian peoples.

  2. Carlo
    Apr 20, 2022

    Is there a way to unlock the spreadsheet so I can run calculations on 277/480V?

    • RockElectric
      Sep 15, 2022

      Just use one of the on line password breakers – Google is your friend !

  3. Dennis Moon
    Oct 25, 2021

    I would like to download various MS Excel Spreadsheets offered on the website. Do I have to be a member? If so, what type?


  4. anup paudel
    May 10, 2021

    i use 11/04kv transformer but this sheet no option of this voltage level

  5. Abdullah
    Apr 23, 2021

    Can someone please explain the source of the conductor constant C? What does that signify? What is the unit? What is the equation?

    I know this has something to do with resistance/distance but can’t really relate how

  6. jorge salomon
    Oct 14, 2020

    very good tool for projects.

  7. FAEZ
    Jul 24, 2020

    Very good work.
    Yet could you make an option which allows you to input the cable data in mmsq and not in AWG (European Standards)?
    Thanks in advance.

  8. Charlie Booth
    Jul 24, 2020

    Thanks a lot, it’s a big help. you’re so kind.

  9. Sitarama Murthy Durvasula
    May 21, 2020

    Nice Information . Thanks

    Mar 31, 2019

    The tools are most valuable materials that will empowered young and existing engineers to grow in their field of operations.

    Much useful, thanks.

  11. AMINU
    Jan 19, 2019

    I am an electrical engineer at the Federal College of Education Yola
    I work in the Electrical section of Works Department
    I really really enjoy your articles keep it up please.

  12. Rajendra Rathod
    Nov 16, 2017

    Thank you, sir
    good article

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