27. An unbalanced star-connected load is supplied from symmetrical three-phase mains. The load impedance are Za, Zb, Zc and the positive phase sequences is a, b, c. Calculate the value of the positive phase-sequence current when the line voltage of the three-phase balanced supply is 400 V and Za = (0+j10) 2. Zb=(0-j5) and Zc=(10+j0) [36.6 A] Ans. 27. An unbalanced star-connected load is supplied from symmetrical three-phase mains. The load imped-ance are Z. Z. Z and the positive phase sequences is a, b. c. Calculate the value of the positive phase-sequencecurrent when the line voltage of the three-phase balanced supply is 400 V and Z = (0+j10) 2. Z-(0-j5) 2and Z=(10+ 0).[36.6 A] (Elect. Theory and Meas. London Univ.)

Given data, Line Voltage VL=400 V Impedances, Za=j10 ΩZb=-j5 ΩZc=10 Ω

Answered: An unbalanced star-connected load is…

Introductory Circuit Analysis (13th Edition)

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27. An unbalanced star-connected load is supplied from symmetrical three-phase mains. The load impedance are Za, Zb, Zc and the positive phase sequences is a, b, c. Calculate the value of the positive phase-sequence current when the line voltage of the three-phase balanced supply is 400 V and Za = (0+j10) 2. Zb=(0-j5) and Zc=(10+j0)

[36.6 A] Ans.

27. An unbalanced star-connected load is supplied from symmetrical three-phase mains. The load imped-
ance are Z. Z. Z and the positive phase sequences is a, b. c. Calculate the value of the positive phase-sequence
current when the line voltage of the three-phase balanced supply is 400 V and Z = (0+j10) 2. Z-(0-j5) 2
and Z=(10+ 0).
[36.6 A] (Elect. Theory and Meas. London Univ.)

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