A single phase line possesses an inductive reactance X of 20 ohms and its connected to...
A single phase line possesses an inductive reactance X of 20 ohms and its connected to a fixed sender voltage of 2000 V. If it is fully compensated, calculate the following:
a. The maximum active power that the line can deliver to a resistive load in kW.
b. The value of the line current in item (a) (polar form)
c. The capacitive reactance that must be installed on the receiver side when the active power is 80 kW.
Homework Answers
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A single phase line possesses an inductive reactance X of 20
ohms and its connected to...
I just need answers to f,g,and h connected motor is connected to Vi-L 120 3T/6 V-rms, 50 Hz three e resistance and inductance of each phase is 8-Ω and 0.04 H, respectively. The PS. A three-phase p...
I just need answers to f,g,and h
connected motor is connected to Vi-L 120 3T/6 V-rms, 50 Hz three e resistance and inductance of each phase is 8-Ω and 0.04 H, respectively. The PS. A three-phase phase source. The wire between a source and the motor has 0.1-Ω of resistance and 1 mH inductance. nd the phase voltage. (2 pts.) a single-phase diagram of the system with its values. (5 pts.) c) Find the line current (magnitude and phase) for...
A three-phase Y-connected motor is connected to VL-L= 120 √3 ∠ ?⁄6 ? — ???, 50...
A three-phase Y-connected motor is connected to VL-L= 120 √3 ∠ ?⁄6 ? — ???, 50 ?? three-phase source. The resistance and inductance of each phase is 8 — Ω and 0.04 H, respectively. The wire between source and the motor has 0.1 —Ω of resistance and 1 ?H inductance. f) Find the line voltage at load side. (3 pts.) g) Determine the capacitive reactance (in Ohms) that should be used to correct the power factor to unity. (Assume Y-connected.)...
5. The line to neutral voltages of a Y-connected three phase source are given by, The...
5. The line to neutral voltages of a Y-connected three phase source are given by, The above three phase source is directly connected to a delta connected balanced three phase resistive load. The resistance in each phase is 10 ohms. Calculate the current phasor 0. Answer- 4. Following three loads are connected in parallel across a single-phase source voltage source: Load 1 absorbs 15 kW and 6.667 kvar; Load 2 absorbs 3 kVA at 0.96PF leading; Load 3 absorbs 15...
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A 208 V, star-connected, 3-phase synchronous motor has a synchronous reactance of 4 ohms/phase and negligible armature winding resistance. At a certain load, the motor takes 7.2 kW at 0.8 pf lagging. If the power developed by the motor remains the same while the excitation voltage is increased by 50% by raising the field excitation, determine (a) the new armature current and (b) the new power factor.
Text problem 2.4: A single-phase source supplies a load of R 25 2 and a reactance...
Text problem 2.4: A single-phase source supplies a load of R 25 2 and a reactance of Xc - are commected in paralel. The " 15 2, both of which are connected in parallel. The voltage across the combination is v(t) - v2(120) cos(wt -45°) v. a) Find V, the total current I, instantaneous current i(t), and the complex power. b) Repeat a) if instead of the capacitive reactance we had inductive reactance of XL = 20 Ω (Partial answer:...
A three-phase line with an impedance of (0.25+j1.25) ohms/phase supplies power to three balanced 3-phase parallel...
A three-phase line with an impedance of (0.25+j1.25) ohms/phase supplies power to three balanced 3-phase parallel connected loads: • Load 1 absorbs a total of 125 kW and 100 KVAR • Load 2 is a delta-connected impedance load with (125+j 40)ohms/phase • Load 3 absorbs 120 kVA at 0.8 power factor (lagging) Given that the line-neutral voltage at the load end of the line is 2400 V, determine the magnitude of the line-to- line voltage at the source end of...
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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...
A three-phase load of 15 kVA with a PF of 0.8 lagging is connected in parallel...
A three-phase load of 15 kVA with a PF of 0.8 lagging is connected in parallel with a three-phase load of 36 kW at 0.6 PF leading. The line-line voltage is 2000V. a) Find the total complex power and power factor. Is it inductive or capacitive? b) How much kVAR is needed to make the PF unity? c) What is the magnitude of the current going into the total load?
1- A 25-kVA, 3-phase, wye-connected, 400-V alternator has a synchronous reactance of 1.6 ohms per phase....
1- A 25-kVA, 3-phase, wye-connected, 400-V alternator has a synchronous reactance of 1.6 ohms per phase. The alternator is to have zero voltage regulation at half-load. Neglecting the armature resistance, find the operating power factor and the developed power 2. A 500-kVA, 3600-V, 3-phase, 60-Hz alternator has an effective armature resistance per phase of 0.40 ohm Mechanical and iron losses is 10 kW, field current at full load unity power factor is 70 A. The exciter voltage is constant at...
I just need answers to f,g,and h
connected motor is connected to Vi-L 120 3T/6 V-rms, 50 Hz three e resistance and inductance of each phase is 8-Ω and 0.04 H, respectively. The PS. A three-phase phase source. The wire between a source and the motor has 0.1-Ω of resistance and 1 mH inductance. nd the phase voltage. (2 pts.) a single-phase diagram of the system with its values. (5 pts.) c) Find the line current (magnitude and phase) for...
5. The line to neutral voltages of a Y-connected three phase source are given by, The above three phase source is directly connected to a delta connected balanced three phase resistive load. The resistance in each phase is 10 ohms. Calculate the current phasor 0. Answer- 4. Following three loads are connected in parallel across a single-phase source voltage source: Load 1 absorbs 15 kW and 6.667 kvar; Load 2 absorbs 3 kVA at 0.96PF leading; Load 3 absorbs 15...
-An electric load consists of a 4Ω resistance, 6Ω inductive reactance and 9Ω capacitive reactance connected in series. The total impedance of the load is connected across a voltage source of 120 V: a) Compute the power factor of the load. Pf- b) Compute the source current c) Compute the real power of the circuit. d) Compute the reactive power of the circuit. Isource
Text problem 2.4: A single-phase source supplies a load of R 25 2 and a reactance of Xc - are commected in paralel. The " 15 2, both of which are connected in parallel. The voltage across the combination is v(t) - v2(120) cos(wt -45°) v. a) Find V, the total current I, instantaneous current i(t), and the complex power. b) Repeat a) if instead of the capacitive reactance we had inductive reactance of XL = 20 Ω (Partial answer:...
A three-phase line with an impedance of (0.25+j1.25) ohms/phase supplies power to three balanced 3-phase parallel connected loads: • Load 1 absorbs a total of 125 kW and 100 KVAR • Load 2 is a delta-connected impedance load with (125+j 40)ohms/phase • Load 3 absorbs 120 kVA at 0.8 power factor (lagging) Given that the line-neutral voltage at the load end of the line is 2400 V, determine the magnitude of the line-to- line voltage at the source end of...
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