Plant L: 100kVA, 0.68pf lagging Plant K: 60kVA, 0.65pf lagging It is desired to correct the power factor of the two plants by connecting a synchronous motor. When the synchronous motor is connected, the overall power factor is corrected to 0.95 lagging. At what power factor is the synchronous motor operates if it is operating at 80kW

Plant L: 100kVA, 0.68pf lagging Plant K: 60kVA, 0.65pf lagging It is desired to correct the power factor of the two plants by connecting a synchronous motor. When the synchronous motor is connected, the overall power factor is corrected to 0.95 lagging. At what power factor is the synchronous motor operates if it is operating at 80kW

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter39: Synchronous Motor Operation

Section: Chapter Questions

Problem 11SQ: Varying the DC voltage to the rotor field changes the a. motor speed. b. power factor. c. phase...

See similar textbooks

Similar questions

Overall efficiency of dc generators is usually of the order of 60 to 70% 70 to 80% 80 to 90% 85 to 95%
To change the direction of rotation of a series wound DC generator the general rule is to
I need the curve between the power factor and mechanical load in synchronous motor
Low lagging power factor results in voltage drop which results in poor voltage regulation.
8. A 10 HP, 6 pole, 60 Hz, 3-phase SCRIM delivers 9.9 HP, with an input of 9200 W. The core loss is 450 W, the stator copper loss is 650 W and the rotational losses is 150 W, what is the motor speed?
Question 3 The load sharing between two parallel connected synchronous generators may be adjusted by varying the field strength of the generators input to their prime movers speed of the generators power factor of the generators
D.C shunt generators are most suitable for arc winding
A 50 Hz, 3-phase induction motor is working at a full load speed of 1440 r.p.m. The full load slip will be
estion The generated voltage per phase of an alternator is E0 while the speed of rotor rotation is 3000 rpm. On changing the rotor speed to 750 rpm, the generated emf phase will become O a. 0.25*EO O b. 0.5*EO O c. 0.75*EO O d. EO
An inductive load consumes 10 kW at 0.75 pf lagging. A synchronous motor with a pf of 0.95 leading is connected in parallel with the inductive load. What is the minimum required kVA size of the synchronous motor so that combined load will have a pf of 0.8 lagging
A 50 Hz, 3-phase induction motor is working at a full load speed of 1440 r.p.m. The full load slip will be a. 0.12 b. 0.06 c. 0.08 d. 0.04
Varying the DC voltage to the rotor field changes the a. motor speed. b. power factor. c. phase excitation. d. slip.