KAssignment 28 Problem 3 Review -Part A A motor attached to a 120 V/60 Hz power...
A motor attached to a 120 V/60 Hz power line draws an 7.50 A current. Its average energy dissipation is 840 W. Part APart complete What is the power factor? 0.933 Part B complete What is the rms resistor voltage? 112 V Part C What is the motor's resistance? nothing ΩΩ Request Answer Part D How much series capacitance needs to be added to increase the power factor to 1.0? nothing μF
need correct answer please help ASAP! A motor attached to a 120 V/60 Hz power line draws an 7.60 A current. Its average energy dissipation is 810 W. How much series capacitance needs to be added to increase the power factor to 1.0?
<CH 32-2 HW Problem 32.39 3 of 11 > Review A series RLC circuit with a 140 2 resistor dissipates 78 W when attached to a 120 V/60 Hz power line. Part A What is the power factor? Express your answer using two significant figures ? cos 919 Submit Previous Answers Request Answer Incorrect; Try Again; 5 attempts remaining
An induction motor draws 1.0 kW at 0.8 lagging power factor from a 250 V, 60 Hz source. [38] (a) What value of capacitance must be placed in parallel with the motor to raise the line power factor to 93% lagging? (b) With the capacitor in service, what are the magnitudes of the motor current, capacitor current, and line current? Solution:
A 4 phase, 460 V, 60 Hz, 26.8 hp, 4 pole, Y-connected induction motor draws 25 A at a power factor of 0.9 lagging. Core loss is 900 W, stator copper loss is 1100W, friction and winding losses are 300 W, and stray loss is neglected. The machine shaft rotates at 1738 rpm. Calculate the air gap power and output load torque - [Induction Motor - 15 points) A three-phase, 460 V, 60 Hz, 26.8 hp, 4-pole, Y-connected induction motor...
5.1 (15 pts) Refer to the circuit connected to a 120-V rms, 60-Hz voltage source as shown below. (a) What is the power factor? (b) What is the average power dissipation? (c) In (b), what is the value of capacitance that will give a power factor of 0.95 lagging when connected to the load? 10 0 10Ω 50 mH 50 mH
Problem 3 (25p) A 120-V, 60-Hz, three-phase, Y-connected, 6 poles, wound-rotor, synchronous motor has a synchronous reactance of 3 ohms. The motor takes a current of 10 A at 0.8 pf leading when operating at a certain field current. The load is gradually increased until the motor develops its maximum torque while the field current is held constant. Determine: a) The new line current b) The power factor c) Torque developed by the motor
A single phase motor draws a current of 30 A from a 240 V, 60 Hz. line. Refer to Problem Description 7.2. A capacitor with a reactance of 31 Ω is then connected in parallel with the motor. A Wattmeter connected to the circuit gives a reading of 5.4 kW. How much reactive power does the capacitor deliver? How much net reactive power remains in the circuit? How much apparent power does the circuit now consume? What is the power...
A 1.6-hp, 8-pole, 60-Hz, three-phase induction motor is rated for 820 rpm, 220 V rms (line-to-line), and 4.32 A (line current) at 77.0 percent lagging power factor. Find the full-load efficiency if the motor is delta-connected and if it is wye-connected.
Problem 3 (25 p) A 120-V, 60-Hz, three-phase, Y-connected, 6 poles, wound-rotor, synchronous motor has a synchronous reactance of 3 ohms. The motor takes a current of 10 A at 0.8 pf leading when operating at a certain field current. The load is gradually increased until the motor develops its maximum torque while the field current is held constant. Determine: a) The new line current b) The power factor c) Torque developed by the motor