Transformer Rated voltages ?

Discussion in 'General Electronics Chat' started by Panterulez, Apr 1, 2009.

  1. Panterulez

    Thread Starter New Member

    Mar 25, 2009
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    What are the rated primary and secondary voltage in a transformer used for ? I know the ratings do not imply the actual operating voltages but what are they meant for then ?
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    They are meant as the actual operating voltages. Unless you are referring to the hipot rating, which rates the insulation to be good to at least that voltage.
     
  3. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    The rated voltages of a transformer are the voltages it can work continusly wiuthout breaking down.
     
  4. Panterulez

    Thread Starter New Member

    Mar 25, 2009
    7
    0
    Alright . One more question. Why is it during Transfomer testing, for the Open Circuit test, the high voltage side is left open and for the Short circuit test, the low voltage side is shorted. Why can't this be the other way round.
     
  5. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It is left open because no current flows and thus there is no voltage drop across the inductance and resistance of the windings.

    It is shorted to ensure that across the ideal windings of the transformer the voltage drop is zero.

    If you post a circuit it would be explained better.
     
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