EBK ELECTRIC MOTOR CONTROL
10th Edition
ISBN: 9780100784598
Author: Herman
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Question
Chapter 46, Problem 8SQ
To determine
Explain the use made of double break contacts or the contacts connected in series such as FA relay contacts across the rheostat and contact M in the armature circuit in Figure 46-4.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Explain how DOL magnetic starter works step by step with diagram and pictures.
List the probable causes if the armature dos notable release after the magnetic starter is de - energized .
Question 11
Design a Duplex layer simplex lap winding DC machine armature winding by providing a complete wiring diagram with the following
Number of Poles: 2
Number of Slots; 8
Thank you and Godbless
ASAP pleasee
Chapter 46 Solutions
EBK ELECTRIC MOTOR CONTROL
Ch. 46 - Prob. 1SQCh. 46 - What physical characteristic distinguishes between...Ch. 46 - Prob. 3SQCh. 46 - What protection is available from excessive...Ch. 46 - How does a field accelerating relay prevent...Ch. 46 - Prob. 6SQCh. 46 - How may more steps of acceleration be added to a...Ch. 46 - Prob. 8SQ
Knowledge Booster
Similar questions
- What is the function of the shunt field rheostat?arrow_forwardExplain how a direct online (DOL) magnetic starter works with diagrams and picturesarrow_forward2. Explain electrical contact resistance. Holm model of electrical contact resistance. Contact hysteresis and main related parameters.arrow_forward
- 5) The deflecting torque of an ammeter varies as the square of the current flowing through it. If a current of 10 A produces a deflection of 90°, what deflection would occur for a current of 5 A when the instrument is (a) spring controlled and (b) gravity controlled? [Ans. (a) 22.5°, (b) 14.5°]arrow_forwardHow does a clamper circuit perform clamping action?arrow_forwardIdentify the DC Generator used for Arc welding purpose. With a neat sketch explain its working. list its advantages & disadvantages??arrow_forward
- A 6 pole dc armature has Simplex lap connected 720 conductors, 3 turns per coil and 4 coil sides per slot. Determine the number of slots in the armature and state whether equalizers can be employed or not ?arrow_forwarda)Please explain the connection methods of Current and Voltage Transformers? b) Control the DC motor speed and direction. Draw the circuit.arrow_forwardExplain the operation of the blowout coil used in dc contactorsarrow_forward
- What is the use of auxiliary contact coil gets the supply in the magnetic controller?arrow_forwardWhile discussing armature testing: Technician A says to test for shorts, place the ohmmeter leads on a commutator segment and armature shaft. Technician B says that continuity should exist between the commutator and the armature shaft. Who is correct?arrow_forwardWhat is armature reaction proportional to?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Delmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningElectricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning