Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 12, Problem 34E
To determine
The line current, the phase current and the phase to neutral voltage for the given condition.
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A star-connected three phase power pack is connected to balanced star-connectedload of 2 + j3 Ω. The line current is 2∠0⁰ A. Assuming negligible impedance onthe cable, calculate:a) the phase and line voltages from the source. b) the real and reactive powers of the circuit.
3. A balanced Y-connected load with phase impedance of 5 Ohms @ 12 degrees is connected to a 3-phase source with a line-to-line voltage of 220 Vac. a. find the magnitude of the current in each line
25.4 <-12 degrees A
b. find the power factor
0.978 logging c. calculate the total complex power
9.678 <12 degrees kva d. calculate the total real power e. calculate the total reactive power
A particular balanced three-phase system is supplying a (delta)-connected load with 10kW at a leading power factor of 0.7. If the phase voltage is 208V and the source operates at 50Hz answer the following:
(a) compute the line current
(b) compute the impedance Zp
(c) draw a circuit diagram representing this system.
Chapter 12 Solutions
Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
Ch. 12.1 - Let and . Find (a) Vad; (b) Vbc; (c) Vcd.Ch. 12.2 - Prob. 2PCh. 12.2 - Modify Fig. 12.9 by adding a 1.5 resistance to...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - A balanced three-phase three-wire system has a...Ch. 12.3 - Three balanced Y-connected loads are installed on...Ch. 12.4 - Each phase of a balanced three-phase -connected...Ch. 12.4 - Prob. 8PCh. 12.5 - Determine the wattmeter reading in Fig. 12.24,...Ch. 12.5 - Prob. 10P
Ch. 12 - Prob. 1ECh. 12 - Prob. 2ECh. 12 - Prob. 3ECh. 12 - Describe what is meant by a polyphase source,...Ch. 12 - Prob. 5ECh. 12 - Prob. 6ECh. 12 - Prob. 7ECh. 12 - Prob. 8ECh. 12 - Prob. 9ECh. 12 - Prob. 10ECh. 12 - The single-phase three-wire system of Fig. 12.31...Ch. 12 - Prob. 12ECh. 12 - Referring to the balanced load represented in Fig....Ch. 12 - Prob. 14ECh. 12 - Prob. 15ECh. 12 - Consider a simple positive phase sequence,...Ch. 12 - Assume the system shown in Fig. 12.34 is balanced,...Ch. 12 - Repeat Exercise 17 with Rw = 10 , and verify your...Ch. 12 - Prob. 19ECh. 12 - Prob. 20ECh. 12 - Prob. 21ECh. 12 - Prob. 22ECh. 12 - A three-phase system is constructed from a...Ch. 12 - Prob. 24ECh. 12 - Each load in the circuit of Fig. 12.34 is composed...Ch. 12 - Prob. 26ECh. 12 - Prob. 27ECh. 12 - A three-phase load is to be powered by a...Ch. 12 - For the two situations described in Exercise 28,...Ch. 12 - Prob. 30ECh. 12 - Prob. 31ECh. 12 - Prob. 32ECh. 12 - Repeat Exercise 32 if Rw = 1 . Verify your...Ch. 12 - Prob. 34ECh. 12 - Prob. 35ECh. 12 - Prob. 36ECh. 12 - A wattmeter is connected into the circuit of Fig....Ch. 12 - Find the reading of the wattmeter connected in the...Ch. 12 - (a) Find both wattmeter readings in Fig. 12.39 if...Ch. 12 - Circuit values for Fig. 12.40 are , , , , . Find...Ch. 12 - Prob. 41ECh. 12 - Prob. 42ECh. 12 - (a) Is the load represented in Fig. 12.41...Ch. 12 - Prob. 44E
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- A delta connected balanced 3-phase supply has a line to line voltage of 181 V and supply a line current of 7.6 A to a three phase load. What is the total reactive power supplied by the source if the load power factor is 0.8 lagging (up to two decimal places).arrow_forwardA balanced delta connected load, consisting of there coils, draws 10-√3 A at 0.5 power factor from 100 V, 3 phase supply. If the coils are re-connected in star across the same supply, find the line current and the total power consume.arrow_forwardA balanced 3-phase load of 30 MW is supplied at 136.6 kV and 0.85 pf lagging by means of transmission line. The sending end voltage is 138.9 kV. The value of constant A is 0.9. Find the %regulation of the transmission linearrow_forward
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