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The resistance and the reactance of a 100 kVA, 11000/400 V,∆ −Y distribution transformer are 0.02 and 0.07 pu, respectively. The phase impedance of the transformer referred to the primary is
  • a)
    (0.02 + j0.07) Ω
  • b)
    (0.55 + j1.925)Ω
  • c)
    (15.125 + j52.94)Ω
  • d)
    (72.6 + j254.1)Ω
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
The resistance and the reactance of a 100 kVA, 11000/400 V, −Y d...
Given that 100KVA, 11000/400V, Delta-star distribution transformer resistance is 0.02pu and reactance is 0.07pu
So
Pu impedance Zpu =0.02+j0.07
Base impedance referred to primary
The phase impedance referred to primary
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Community Answer
The resistance and the reactance of a 100 kVA, 11000/400 V, −Y d...
Three-phase transformer are given as follows:

Resistance (R) = 0.5 ohms per phase
Reactance (X) = 2.0 ohms per phase

To calculate the resistance and reactance per phase, we need to divide the given values by the number of phases.

Resistance per phase (R_phase) = R / 3 = 0.5 / 3 = 0.1667 ohms per phase
Reactance per phase (X_phase) = X / 3 = 2.0 / 3 = 0.6667 ohms per phase

Therefore, the resistance per phase is 0.1667 ohms and the reactance per phase is 0.6667 ohms.
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The resistance and the reactance of a 100 kVA, 11000/400 V, −Y distribution transformer are 0.02 and 0.07 pu, respectively. The phase impedance of the transformer referred to the primary isa)(0.02 + j0.07)Ωb)(0.55 + j1.925)Ωc)(15.125 + j52.94)Ωd)(72.6 + j254.1)ΩCorrect answer is option 'D'. Can you explain this answer?
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The resistance and the reactance of a 100 kVA, 11000/400 V, −Y distribution transformer are 0.02 and 0.07 pu, respectively. The phase impedance of the transformer referred to the primary isa)(0.02 + j0.07)Ωb)(0.55 + j1.925)Ωc)(15.125 + j52.94)Ωd)(72.6 + j254.1)ΩCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The resistance and the reactance of a 100 kVA, 11000/400 V, −Y distribution transformer are 0.02 and 0.07 pu, respectively. The phase impedance of the transformer referred to the primary isa)(0.02 + j0.07)Ωb)(0.55 + j1.925)Ωc)(15.125 + j52.94)Ωd)(72.6 + j254.1)ΩCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The resistance and the reactance of a 100 kVA, 11000/400 V, −Y distribution transformer are 0.02 and 0.07 pu, respectively. The phase impedance of the transformer referred to the primary isa)(0.02 + j0.07)Ωb)(0.55 + j1.925)Ωc)(15.125 + j52.94)Ωd)(72.6 + j254.1)ΩCorrect answer is option 'D'. Can you explain this answer?.
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