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Thread: %Z ?

  1. #11
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    During transformer construction, the manufacturer has a design goal for impedance. ANSI allows for some tolerance in the final result from the design goal # and I think it is 10% plus/minus.

    They would put the tested impedance value on the nameplate, but there are times when you only know the goal value, or only an estimated value (many will guess at 2% for small utility XFMRS and 5.75% for larger), so you take a worst case estimate, which would include a -10% impedance adjustment too.
    Ron

  2. #12
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    Quote Originally Posted by electrofelon View Post
    Wow that is some transformer. Going to have to ponder how they get 2008y/120 voltages
    FM...
    __________________________________________________ ____________________________
    Many people are shocked when they discover I am not a good electrician...

  3. #13
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    Quote Originally Posted by electrofelon View Post
    Wow that is some transformer. Going to have to ponder how they get 2008y/120 voltages
    I have no clue, I just snagged the pic off Google.
    "Electricity is really just organized lightning." George Carlin


    Derek

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