Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Chapter 24, Problem 41P
A balanced, three-phase,
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Three Impedances each of (9 - j18)N are
connected in mesh across a three-phase 415V ac
supply. Determine the phase current, line current,
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Chapter 24 Solutions
Introductory Circuit Analysis (13th Edition)
Ch. 24 - A balanced V load having a 10 resistance in each...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - Repeat Problem 1 if each phase impedance is...Ch. 24 - The phase sequence for the Y-Y system in Fig....Ch. 24 - Repeat Problem 4 if each phase impedance are...Ch. 24 - Repeat Problem 4 if each phase impedance is...Ch. 24 - For the system in Fig. 24.43, find the magnitude...Ch. 24 - Computer the magnitude of the voltage EAB for the...Ch. 24 - For the Y-Y system in Fig. 24.45: a. Find the...Ch. 24 - For the Y-Y system of Fig. 24.46 the impedance of...
Ch. 24 - A balanced load having a 20 resistance in each...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - Repeat Problem 11 if each phase impedance is...Ch. 24 - The phase sequence for the Y- system in Fig....Ch. 24 - Repeat Problem 14 if each phase impedance is...Ch. 24 - Repeat Problem 14 if each phase impedance are...Ch. 24 - Prob. 17PCh. 24 - For the connected load in Fig. 24.49: a. Find the...Ch. 24 - A balanced V load having a 30 resistance in each...Ch. 24 - Repeat Problem 19 if each phase impedance is...Ch. 24 - Prob. 21PCh. 24 - Prob. 22PCh. 24 - Prob. 23PCh. 24 - Repeat Problem 22 if each phase impedance is...Ch. 24 - Prob. 25PCh. 24 - Prob. 26PCh. 24 - Prob. 27PCh. 24 - The phase sequence for the - system in Fig....Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Repeat Problem 28 if each phase impedance is...Ch. 24 - Prob. 31PCh. 24 - Prob. 32PCh. 24 - Prob. 33PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 35PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - Prob. 38PCh. 24 - Prob. 39PCh. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - A balanced, three-phase, -connected load has a...Ch. 24 - A balanced, three-phase, Y-connected load has a...Ch. 24 - Find the total watts, volt-amperes reactive,...Ch. 24 - The Y-Y system in Fig. 24.53 has a balanced load...Ch. 24 - Prob. 45PCh. 24 - Prob. 46PCh. 24 - Repeat Problem 46 for the network in Fig. 24.47.Ch. 24 - For the three-wire system in Fig. 24.55, properly...Ch. 24 - Sketch three different ways that two wattmeters...Ch. 24 - For the Y- system in Fig. 24.56: Determine the...Ch. 24 - For the system in Fig. 24.57: Calculate the...Ch. 24 - For the three-phase, three-wire system in Fig....
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- Three Impedances each of (12 – j20)Q are connected in mesh across a three-phase 415V ac supply. Determine the phase current, line current, active power, reactive power drawn from supply. Also draw the Phasor diagram for the mesh connection and marks the Line current ,phase current line voltage and phase angle between phase current and pahse voltage phase current (Ip) Line current real power reactive powerarrow_forwardIn the circuit in the figure; L1 load draws 15 kVA with lagging power factor 0.6. The L2 load draws 6 kVA with a leading power factor of 0.8. According to this; What is the value of the complex power for the L2 load?arrow_forwarda. Y-Connected b. В 100kW Source 0.9 LAG 80KVA 0.8 LAG Figure 1 80kW 0.85 LAGarrow_forward
- Question 1: Based on figure below: a. Find the total impedance Z, in polar form b. Draw the impedance diagram c. Find the current I and voltages VR, V, and Vc in phasor form d. Draw the phasor diagram of the voltages E, VR, Viand Vc, and the current I. e. Verify Kirchhoff's voltage law around the closed loop. f. Find the average power delivered to the circuit g. Find the power factor of the circuit, and indicate whether it is leading or lagging. h. What happened if Xc= 20 ? Please explain. R- 40 X, = 6N Xc = 10 N %3D + UR + UL + vc e = 70.7 sin 377t|arrow_forwardA balanced delta-connected load is supplied by a 60 Hz 3-phase source with a line voltage of 240 V. Each load phase draws 6kW at a lagging power factor of 0.8. Calculate: a. The load impedance per phase b. The line current c. The value of the capacitance needed to be connected in parallel with each load to minimize the current from the source (PF=1)arrow_forwardTwo delta connected loads are connected in parallel and powered by a balanced Y-connectedsource. The smaller of two loads draws 10 kVA at a lagging power factor of 0.75 and the largerdraws 25 kVA at a leading power factor of 0.8. The line voltage is 400 V. Calculate a) The powerfactor at which the source is operating. b) The total power drawn by the two loads. c) The phasecurrent of each load.arrow_forward
- 2. A voltage applied to a load is V=208420°V and current through load is I=10 &-10° A. Find the following [SO 1] o complex power consumed by load • Is the load inductive or capacitive? o the power factor of the load o the reactive power consumed or generated by the load. o Does the load consume or supply reactive power? 3. A single phase motor draws 20 kVA at 0.70 lagging power factor from a 120 V source. The PUD desires to improve the power factor to 0.9 lagging by connecting a shunt capacitor bank across the terminals of the motor. Determine the size of the capacitor bank in VARS. Calculate the following: [SO 1] a) What are the initial load current, real and reactive powers of the load? b) What are the real and reactive power after adding the capacitor bank? c) What is the kVAr rating of the capacitor bank? (3) d) What is the load current? di) How is the load current affected by the load reactive power?arrow_forward2. For the following system shown in the figure, calculate: a. The current through each phase of the load. b. The total real and reactive power of the three-phase load. c. The power factor at the load side. A 220 V 20° 220VL-120° U8 vol 152 I 220 VI20° 9. M.arrow_forwardTwo impedances are connected in parallel to the supply; the first takes a current of40A at a lagging phase angle of 300, and the second a current of 30A at a leadingphase angle of 450. Draw a phasor diagram to scale to represent the supply voltageand these currents. By calculation, determine the total current taken from the supplyand its phase angle. All currents are expressed in their r.m.s. valuesarrow_forward
- 1. Find the current and voltages Vr,Vl and Vc in phasor form. 2. Verify the kirchoffs volatage law around the closed loop. 3. Find the power factor of the circuit and indicate whether it os leading or laggingarrow_forwardThe following loads are served by a balanced three-phase source: Load 1: 18 kVA at 0.8 pf lagging Load 2: 8 kVA at 0.8 pf leading Load 3: 12 kVA at 0.75 pf lagging. Give the complex power expression for Load 3. Select one: O a. 29.80 +j13.94 O b. O c. 9.00+ j7.94 kVA 6.40 -j4.80 KVA O d. 32.90225.07° KVA O e. 14.40 +j10.80 kVAarrow_forwardThe phase b voltage and the phase b current of a balance three-phase system are V = 220 sin (wt + 210°) and I = 10 sin (wt-180°). * A. 5256.44 W B. 5514.38 W C. 5715.76 W D. 6049.22 Warrow_forward
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