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hw_acpower

# hw_acpower - (real power of 10 kW at a lagging power factor...

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EECE 519 Homework - AC power 1. A residential electric power monitoring system rated for 120 V (rms), 60 Hz source registers power consumption of 1.2 kW, with a power factor of 0.8 lagging. Find (a) The rms current (b) The phase angle (c) The system impedance (d) The system resistance. Ans: (a) I rms = 12 . 5 A (b) θ = 36 . 87 o (c) Z = 9 . 6 6 36 . 87 o Ω (d) R = 7 . 68Ω 2. An electrical load operates at 60 Hz, 120V (rms). the load absorbs an average
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Unformatted text preview: (real) power of 10 kW at a lagging power factor of 0.8. If a capacitor is connected in parallel with the load to improve the power factor, determine the required capacitance to increase the power factor to 0.9. (Ans: C ≈ 490 μF )...
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