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508 CHAPTER 11 . POLYPHASE CIRCUITS 11.40 In a balanced three-phase system, the source has an...
508 CHAPTER 11 . POLYPHASE CIRCUITS 11.40 In a balanced three-phase system, the source has an aboc phase-sequence and is connected in delta. There are two rallel wye-connected loads. The phase impedance of load i and load 2 is 4 The line impedance connecting the source to the loads is 0.3 + j0.2 2. If the curre IAN! = 10/20-Arms, find the delta currents in the source 4 Ω and 10 +/4 Ω, respectively. nt in the a phase of...
A three-phase line, which has an impedance of (2 + j4) Ω per phase, feeds two...
A three-phase line, which has an impedance of (2 + j4) Ω per phase, feeds two balanced three-phase loads that are connected in parallel. One of the loads is Y- connected with an impedance of (30 + j40) Ω per phase, and the other is delta- connected with an impedance of (60 + j45) Ω per phase. The line is energized at the sending end from a 60-Hz, three phase, balanced voltage source of 120√3 V (rms, line- to-line). Determine...
Problem #1 25 points A balanced three phase 230 V (line to line), 60 Hz source...
Problem #1 25 points A balanced three phase 230 V (line to line), 60 Hz source supplying 800 W to a Y connected load at a power factor of O.7 lagging. Three equal capacitors connected in Y are placed in parallel with the load to improve the power factor. What must be the size of the to yield power factor to unity? What would be required capacitor size if the caps are in delta connected.? Calculate total watt supplied by...
The following three-phase, balanced loads are connected across a three-phase, Y-connected 60 Hz source with a...
The following three-phase, balanced loads are connected across a three-phase, Y-connected 60 Hz source with a line-to-line voltage of 480 V. The loads are described below: • Load 1: ∆-connected, total three-phase apparent power is 30 kVA at 0.95 power factor lagging. • Load 2: ∆-connected, total three-phase active power is 20 kW at 0.7 power factor lagging. • Load 3: Y-connected, phase current is 30 A, and power factor is 0.9 pf leading. (a) Calculate the total complex power...
In a balanced three-phase system, the source is wye-connected and the source voltage of phase A is Van = ∠ 120 20 V. The load consists of two balanced wyes in parallel with phase impedances of 8 + j6 Ω and 12 + j8 Ω. If the line impedance is zero, find t
In a balanced three-phase system, the source is wye-connected and the source voltage of phase A is Van = ∠ 120 20 V. The load consists of two balanced wyes in parallel with phase impedances of 8 + j6 Ω and 12 + j8 Ω. If the line impedance is zero, find the line currents and the phase currents in each load. (Hint: use per phase analysis, then do angle shift for each phase.)
A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 440 V rms....
A balanced positive-sequence wye-connected 60-Hz three-phase source has line-to-line voltages of VL = 440 V rms. This source is connected to a balanced wye-connected load. Each phase of the load consists of a 0.5-H inductance in series with a 50-Ω resistance. Assume that the phase of Van is zero. home / study / engineering / electrical engineering / electrical engineering questions and answers / A Balanced Positive-sequence Wye-connected 60-Hz Three-phase Source Has Line-to-line Voltages ... Question: A balanced positive-sequence wye-connected...
6.12 A three-phase, Y-connected, 460-V (line-line), 37-kW, 60-Hz, four-pole induction motor has the following equivalent-circuit parameters...
6.12 A three-phase, Y-connected, 460-V (line-line), 37-kW, 60-Hz, four-pole induction motor has the following equivalent-circuit parameters in ohms-per-phase referred to the statr: R10.070 R2 0.152 X 0.743 X2 0.764 Xm 40.1 The total friction and windage losses may be assumed constant at 390 W, and the core loss may be assumed to be equal to 325 W. With the motor connected directly to a 460-V source, compute the speed, output shaft torque and power, input power, and power factor and...
A three phase line has an Impedance of 0.4+j2.7 Ω per phase. The line feeds two...
A three phase line has an Impedance of 0.4+j2.7 Ω per phase. The line feeds two balanced three phase loads that are connected in parallel. The first load is absorbing 560.1kVA @ PF=0.707 lagging and the second load absorbs 132kW @ PF=1. The line-to-line voltage at the load side is 3810.5/_30° V. Determine: a) The magnitude of the line voltage at the source side b) Total active & reactive power loss in the line c) Active and reactive power at...
help find those answers please 10) In a certain A-connected balanced load, the line voltages are...
help find those answers please
10) In a certain A-connected balanced load, the line voltages are 230 V and the impedances are 60 35 2. Determine the magnitude of the phase currents A) 1.63 A B) 2.78 A C) 3.83 A D) 4.15 A 11) In a certain Δ-connected balanced load, with line voltages of 230 V and impedances of 60 L35Ώ, determine the total power A) 920.2 W B) 2346.3 W C) 1572.9 w D) 1250.9 W 12) For...
Question: A three-phase line has an impedance of 1 + j2 Ω per phase. The line...
Question: A three-phase line has an impedance of 1 + j2 Ω per phase. The line feeds two balanced three-phase loads that are connected in parallel. The first load is Y-connected and has an impedance of 20+j40 Ω per phase. The second load is ∆-connected and has an impedance of 30-j60 Ω per phase. The line-to-line voltage at the load end of the line is 415V. Taking the phase voltage Va as reference, determine: a) The total current per phase...
508 CHAPTER 11 . POLYPHASE CIRCUITS 11.40 In a balanced three-phase system, the source has an aboc phase-sequence and is connected in delta. There are two rallel wye-connected loads. The phase impedance of load i and load 2 is 4 The line impedance connecting the source to the loads is 0.3 + j0.2 2. If the curre IAN! = 10/20-Arms, find the delta currents in the source 4 Ω and 10 +/4 Ω, respectively. nt in the a phase of...
Problem #1 25 points A balanced three phase 230 V (line to line), 60 Hz source supplying 800 W to a Y connected load at a power factor of O.7 lagging. Three equal capacitors connected in Y are placed in parallel with the load to improve the power factor. What must be the size of the to yield power factor to unity? What would be required capacitor size if the caps are in delta connected.? Calculate total watt supplied by...
6.12 A three-phase, Y-connected, 460-V (line-line), 37-kW, 60-Hz, four-pole induction motor has the following equivalent-circuit parameters in ohms-per-phase referred to the statr: R10.070 R2 0.152 X 0.743 X2 0.764 Xm 40.1 The total friction and windage losses may be assumed constant at 390 W, and the core loss may be assumed to be equal to 325 W. With the motor connected directly to a 460-V source, compute the speed, output shaft torque and power, input power, and power factor and...
help find those answers please
10) In a certain A-connected balanced load, the line voltages are 230 V and the impedances are 60 35 2. Determine the magnitude of the phase currents A) 1.63 A B) 2.78 A C) 3.83 A D) 4.15 A 11) In a certain Δ-connected balanced load, with line voltages of 230 V and impedances of 60 L35Ώ, determine the total power A) 920.2 W B) 2346.3 W C) 1572.9 w D) 1250.9 W 12) For...
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