8. Two impedances, Z, = 0.8 + j5.6 Q and Zz = 8 - j16 Q, and a single-phase mot are connected in parallel across a 200- V rms, 60HZ supply as shown in figu below. The motor draws 5 kVA at 0.8 power factor lagging. 0.8 + j5.6 Q 8- j16 Q S3 = 5 kVA at 0.8 PF lag 20020° V M a) Find the complex power S,, S2 for the two impedances, and S3 for the motor. b) Determine the total power taken from the supply, the supply current, and the overall power factor.

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter2: Fundamentals
Section: Chapter Questions
Problem 2.29MCQ: The total instantaneous power absorbed by a three-phase motor (under balanced steady-state...
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8.
Two impedances, Z, = 0.8 + j5.6 Q and Z2 = 8 - j16 Q, and a single-phase motor
are connected in parallel across a 200- V rms, 60HZ supply as shown in figure
below. The motor draws 5 kVA at 0.8 power factor lagging.
0.8 + j5.6 Q
8-j16 O
S3 = 5 kVA
at 0.8 PF lag
20020° V
M
a) Find the complex power S,, S2 for the two impedances, and S, for the motor.
b) Determine the total power taken from the supply, the supply current, and the
overall power factor.
Transcribed Image Text:8. Two impedances, Z, = 0.8 + j5.6 Q and Z2 = 8 - j16 Q, and a single-phase motor are connected in parallel across a 200- V rms, 60HZ supply as shown in figure below. The motor draws 5 kVA at 0.8 power factor lagging. 0.8 + j5.6 Q 8-j16 O S3 = 5 kVA at 0.8 PF lag 20020° V M a) Find the complex power S,, S2 for the two impedances, and S, for the motor. b) Determine the total power taken from the supply, the supply current, and the overall power factor.
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