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1 with its current coil in line C and its potential coil across If one wattmeter is connected with 514 ELECTRICAL CIRCUITS-ALTERN R and Xc. following loads: IAB 12/0°, IBC line currents LA, IB, and Ic. 26. The three line voltages in Prob. 25 are 230. 12/-60°, ICA= 16/60°. Calculate the ond what is the totsal

1 with its current coil in line C and its potential coil across If one wattmeter is connected with 514 ELECTRICAL CIRCUITS-ALTERN R and Xc. following loads: IAB 12/0°, IBC line currents LA, IB, and Ic. 26. The three line voltages in Prob. 25 are 230. 12/-60°, ICA= 16/60°. Calculate the ond what is the totsal

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Answer Number 24 Write your Solution Pls Box your Final answer.

a 7.68-kw 0.866 lagging power-factor load connected to lines CN. Calculate (a) the neutral current IN; (b) the line currents IA, IB, and Ic; (c) the total power (8.66 + j5). Calculate (a) the three line currents Calculate the line currents IA, IB, and Ic. 514 18-19). Rand Xc. amp, and load CA is 16/-30° amp. 12/0, IBC 16/60°. Calculate the 12/-60°, ICA = following loads: IAB= line currents LA, IB, and Ic. power? lines C and B, what will each wattmeter register, and what is the tote power to a group of delta-connected impedances whose values are Z.. Z BC = (5 IA, IB, and Ic; (b) the total power. 28. Solve Prob. 25 for a phase sequence EAB, ECA, EBC. 29. Solye Prob. 27 for a phase sequence EAB, ECA, EBC. 30. Three equal impedances, each one equal to (6.12 + j5.13) ohms, are connestal in star and to a three-phase 208-volt source. (b) the total power, (c) the reading on each of two wattmeters properly connected to register the total power. 31. The following information is given in connection with a circuit similar to that of the unbalanced star of Fig. 18.27: line voltages Zc 15/-30°; phase sequence of voltages is EAB, EBC, ECA. Calculate (@) the equivalent impedances Zx, ZY, and Zz of an equivalent delta; (b) the phase cur- rents Ix, Iy, and Iz in the equivalent delta; (c) the line currents IA, IB, and Ic in the actual star-connected system; (d) the total power taken by the load. 32. The following particulars are given for the circuit of Fig. 18-28: EAB EcA tions, calculate (a) the line currents IA, IB, and Ic; (b) the total a phase sequence of EAB, EBC, ECA. 33. Referring to the 120/208-volt three-phase four-wire system of Fig. 18-29, the following information is given in connection with loads delivered by the source 208-volt three-phase motor loads aggregating 75 hp, at a power factor oi 0.8 188 ging and an efficiency of 81 per cent; a 10.8-kw unity-power-factor load conue to lines AN; a 12.5-kw 0.866 leading power-factor load connected to lnes o (10+j0), %3D j8.66), and ZcA = Calculate (a) the line currents, = 246; ZA 15/0°, ZB = 15/30°, %3D E BC = 15. Using Maxwell's loop equa- 230; ZA = 9 +j12; ZB 9 - j12; Zc %3D power. Assume delivered by the source. The phase sequence is EAN, E BN, ECN.
Transcribed Image Text:a 7.68-kw 0.866 lagging power-factor load connected to lines CN. Calculate (a) the neutral current IN; (b) the line currents IA, IB, and Ic; (c) the total power (8.66 + j5). Calculate (a) the three line currents Calculate the line currents IA, IB, and Ic. 514 18-19). Rand Xc. amp, and load CA is 16/-30° amp. 12/0, IBC 16/60°. Calculate the 12/-60°, ICA = following loads: IAB= line currents LA, IB, and Ic. power? lines C and B, what will each wattmeter register, and what is the tote power to a group of delta-connected impedances whose values are Z.. Z BC = (5 IA, IB, and Ic; (b) the total power. 28. Solve Prob. 25 for a phase sequence EAB, ECA, EBC. 29. Solye Prob. 27 for a phase sequence EAB, ECA, EBC. 30. Three equal impedances, each one equal to (6.12 + j5.13) ohms, are connestal in star and to a three-phase 208-volt source. (b) the total power, (c) the reading on each of two wattmeters properly connected to register the total power. 31. The following information is given in connection with a circuit similar to that of the unbalanced star of Fig. 18.27: line voltages Zc 15/-30°; phase sequence of voltages is EAB, EBC, ECA. Calculate (@) the equivalent impedances Zx, ZY, and Zz of an equivalent delta; (b) the phase cur- rents Ix, Iy, and Iz in the equivalent delta; (c) the line currents IA, IB, and Ic in the actual star-connected system; (d) the total power taken by the load. 32. The following particulars are given for the circuit of Fig. 18-28: EAB EcA tions, calculate (a) the line currents IA, IB, and Ic; (b) the total a phase sequence of EAB, EBC, ECA. 33. Referring to the 120/208-volt three-phase four-wire system of Fig. 18-29, the following information is given in connection with loads delivered by the source 208-volt three-phase motor loads aggregating 75 hp, at a power factor oi 0.8 188 ging and an efficiency of 81 per cent; a 10.8-kw unity-power-factor load conue to lines AN; a 12.5-kw 0.866 leading power-factor load connected to lnes o (10+j0), %3D j8.66), and ZcA = Calculate (a) the line currents, = 246; ZA 15/0°, ZB = 15/30°, %3D E BC = 15. Using Maxwell's loop equa- 230; ZA = 9 +j12; ZB 9 - j12; Zc %3D power. Assume delivered by the source. The phase sequence is EAN, E BN, ECN.
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