Loose Leaf for Engineering Circuit Analysis Format: Loose-leaf
9th Edition
ISBN: 9781259989452
Author: Hayt
Publisher: Mcgraw Hill Publishers
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Chapter 12.3, Problem 4P
A balanced three-phase three-wire system has a Y-connected load. Each phase contains three loads in parallel: −j100 Ω, 100 Ω, and 50 + j50 Ω. Assume positive phase sequence with
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A 3-phase, 50-Hz overhead transmission line 100 km long has the following constants :
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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 530 kV, three phase transmission line with a 350 km length. The series impedance Z =(0.11+j0.72) Ω/ph/km and shunt admittance y = (j73 x e(-7)) S/ph/km. Evaluate the equivalent π-model and T-model parameters.arrow_forwardA 3-phase, 50 Hz overhead transmission line has the following constants :Resistance/phase = 9·6 Ω Inductance/phase = 0·097 mH Capacitance/phase = 0·765 µFIf the line is supplying a balanced load of 24,000 kVA 0·8 p.f. lagging at 66 kV, calculate :(i) sending end current (ii) line value of sending end voltage(iii) sending end power factor (iv) percentage regulation(v) transmission efficiencyarrow_forward:A three-phase, three-wire, ABC system has effective line voltage 173.2 V. Wattmeters in lines A and B read -301 W and 1327 W, respectively. Find the impedance of the balanced Y-connected load. (Answer 10 angle -70° )arrow_forward
- A 3-phase, 50 Hz, overhead transmission line delivers 10 MW at 0·8 p.f. lagging and at 66 kV. The resistance and inductive reactance of the line per phase are 10 Ω and 20 Ω respectively while capacitance admittance is 4 × 10− 4 siemen. Calculate : (i) the sending end current (ii) sending end voltage (line-to-line) (iii) Power angle and sending end pf (iv) transmission efficiency Use nominal T methodarrow_forward3-phase ,50Hz overhead transmission line has the following constanats: resistance/phase=9.6ohms inductance/phase=0.097ohms capictance/phase=0.765uf if the line is supplying a balanced load of 24,000KVA 0.8 p.f lagging at 66kv calculate : sending end current line value of sending end current sending end power factor percentage regulation transmission efficiencyarrow_forwardThe following diagram shows a three-wire single-phase circuit of a house. Consider that the refrigerator consumes 8.5 A, with an inductive angle of 45°. TV and kitchen loads are 200W and 8kW respectively. Calculate: a) Current line 1, line 2 and neutral. b) Total power of the circuit....arrow_forward
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- A 3- phase star connected load has resistance of 10 Ω, inductance of 15.9mH & a capacitive reactance of 8 Ω respectively in R, B & Y phases. If the voltage between line and neutral line is 231V, 50Hz supply, Assume RYB sequence.Calculate the neutral current and Draw the current & voltage phasors.arrow_forwardA 3-phase, 50 Hz, overhead transmission line delivers 10 MW at 0·8 p.f. lagging and at 66 kV. The resistance and inductive reactance of the line per phase are 10 Ω and 20 Ω respectively while capacitance admittance is 4 × 10− 4 siemen. Calculate :(i) the sending end current (ii) sending end voltage (line-to-line)(iii) sending end power factor (iv) transmission efficiencyUse nominal T method.arrow_forwardThree triphasic loads associated in parallel are powered by a balanced triphasic source: LOAD 1: 250 kVA, Power Factor (PF) = 0,8 (delayed) LOAD 2: 300 kVA, PF = 0,95 (advanced) LOAD 3: 450 kVA, PF = 1 If the line voltage is 13,8 kV, calculate the line current (in ampère). Suppose the line impedance is zero.arrow_forward
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How do Electric Transmission Lines Work?; Author: Practical Engineering;https://www.youtube.com/watch?v=qjY31x0m3d8;License: Standard Youtube License