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Electrical Mach...

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  • Question 1
    1 / -0

    A 6.6 kV/ 415 V delta/star connected distribution transformer has 4% resistance and 8% reactance. The voltage regulation of transformer at full load 0.6 Pf lead is ________ (in %)

  • Question 2
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    Transformer connections of two three phase transformers are given in the options. Which of the pair is not suitable for the parallel operation.

  • Question 3
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    A 3-phase, 50 Hz transformer has an iron cross section of 200 cm2. If the flux density be limited to 1.5 wb/m2. The voltage ratio is 4400/220 V, the high voltage side being connected in star and low voltage in delta. Stacking factor is 0.8. The sum of number of turns per phase on high and low voltage winding is

  • Question 4
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    A 500 kVA, 13 kV/ 440V star-star connected transformer is reconnected as delta-star. The rating of the newly connected transformer is 

  • Question 5
    1 / -0

    If the OC test data on delta side of a three phase Y - Δ transformer is 66 kV, 11 A, 45 kW, the magnetizing component of phase current will be ________A.

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