A 2.15 KV, 1100-HP, unity power factor, 60-Hz, 2-pole, A-connected synchronous motor has a synchronous reactance of 10.0 0 per-phase and a negligible armature resistance. The friction and windage losses together with the core losses are 4.4 KW. The open-circuit characteristic of this motor is shown below in a tabular form This motor is being supplied from a large power system. How much field current is required to run this motor at 1100 HP, 2.15 KV, and PF = 1? 3.0 3.5 4.0 4.5 5.0 IF (A) O VT,oc 0 1.0 2.0 6.0 7.0 8.0 9.0 10.0 650 1250 1800 2000 2200 2375 2500 2650 2800 2820 2850 2880 Select one: O a. None O b.lE= 4.2 A O c. IF= 5.0 A O d. IF = 3.8 A O e.lF= 6.0 A Clear my choice

A 2.15 KV, 1100-HP, unity power factor, 60-Hz, 2-pole, A-connected synchronous motor has a synchronous reactance of 10.0 0 per-phase and a negligible armature resistance. The friction and windage losses together with the core losses are 4.4 KW. The open-circuit characteristic of this motor is shown below in a tabular form This motor is being supplied from a large power system. How much field current is required to run this motor at 1100 HP, 2.15 KV, and PF = 1? 3.0 3.5 4.0 4.5 5.0 IF (A) O VT,oc 0 1.0 2.0 6.0 7.0 8.0 9.0 10.0 650 1250 1800 2000 2200 2375 2500 2650 2800 2820 2850 2880 Select one: O a. None O b.lE= 4.2 A O c. IF= 5.0 A O d. IF = 3.8 A O e.lF= 6.0 A Clear my choice

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

A 4-pole, 50 Hz, 3-phase induction motor has a rotor resistance / phase of 0.03 ohm and reactance of 0.12 ohm per phase. What is the value of speed at maximum torque? So, we can get
23. As load is increased from no load to full load on a 3-phase squirrel-cage induction motor, what happens to the ..
How can the speed of a shunt DC motor be controlled
The rotor of a four-pole, 50 Hz slip-ring induction motor has a resistance of 0.2 0 per phase and runs at 1425 rpm at full-load. Determine the external resistance per phase which must be added to reduce the speed to 1200 rpm, the torque remaining same in both the cases.
The relation between armature torque and armature current of a DC motor is Parabolic Linear Inverse Exponential
A 200 V dc shunt motor takes a current of 20A on a certain load. R= 12 and Rah= 2002. Find the resistance to be inserted in series with the armature to reduce the speed to 75% of its original value if the load torque is constant.
A 3 phase, 1500 rpm, 2200 V, star connected synchronous motor has an impedance of 0.4+j90 per phase. At some excitation 2900 V is induced in the armature. Find the maximum torque developed by motor before the motor breaks out of synchronism. Also find the load angle this time.
Explain the speed-current, torque-current and speed-torque characteristics of dc series motor.
Draw Torque-speed curve of a three phase induction motor and define Locked rotor torque,Pull- up torque and Breakdown torque.