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)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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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.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9b0b5d3d-5618-4c12-bc0f-6b93979bb4c0%2F5d322abb-7d6e-4dd4-8958-b9de12aa1d4c%2Fqm1jyh_processed.jpeg&w=3840&q=75)
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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