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Volatge regulation of a single phase transformer

  1. Apr 14, 2010 #1
    A 10 kVA, 2200/220 V, 50 Hz single phase transformer is tested and the following results are obtained.
    Open circuit test (LV)

    Short circuit test (HV)

    Voc = 220 V

    Vsc = 150 V

    Ioc = 2.5 A

    Isc = 4.55 A

    Poc = 100 W

    Psc = 215 W


    Calculate:
    (i)The transformer parameters and draw the equivalent circuit referred to the high voltage side.

    answered

    (ii)The transformer parameters and draw the equivalent circuit referred to the low voltage side.
    answered

    (iii)The approximate value of secondary voltage at full load of 0.85 lagging power factor. Draw the phaser diagram.
    answered

    (iv)Determine the voltage regulation in percentage for a load condition of half-load efficiency of 0.6 power factor lagging. Draw the phaser diagram.
    i don't know how to calculate V.R for half load efficiency..
    should i calculate the half load efficiency first?
     
  2. jcsd
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