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Unformatted text preview: Problem I
For the circuit in Figure 1, draw single phase equivalent circuit, calculate the magnitude
and the angle of line—to—line and phase voltage at the load as well as the real and reactive power at the load.
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ligpﬂﬂlléw 2 QL$¢=lgZ Kl/A’r Problem 2 a) A circuit consists of two impedances 2121045012, 22:154—40°£2 in parallel
supplied by the source voltage of V=100430°V D termine and draw phasor
diagram for the power of each impedance and tgeo lairce. Also find the power
factor at the source. b) Assume that the real power of the source is to remain unchanged. If the power
factor is to be corrected to pf=l, what element should be connected to the circuit
and what would be the value, real and reactive power of that element? _ \Vlz .. IDOZ _.
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6 t z I L. "“' q Problem 3
Circuit in Figure 2 is supplied by the 100V, 60Hz source. Find the Northon equivalent
circuit. 109 26 mH =30 Figure 2 \OJL
2N = \o;1_1\ Omar330) = CM
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 Spring '08
 Jurkovic

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