Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 2, Problem 6SQ
To determine
Choose the best option which represents a fractional horse power manual motor starter.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of a motor is called a
A. potentiometer. B. variable reluctor. C. rheostat.D. power resistor.
3. Explain the difference between manual motor starters that provide low voltage release and those that do not.
Technician A says when testing the voltage output, if the charging voltage is too high, the cause could be an open field wire from the regulator. Technician B says a loose or glazed drive belt could be the cause of too high charging voltage. Who is correct?
A only
B only
Both A and B
Neither A or B
Technician A says that poor connection at the generator output wire can cause charging systems problems. Technician B says that many charging system circuits contain a circuit protection device. Who is correct?
A only
B only
Both A and B
Neither A or B
Chapter 2 Solutions
Electric Motor Control
Ch. 2 - If the contacts on a manual starter cannot be...Ch. 2 - If the handle of an installed motor starter is in...Ch. 2 - How may an automatic operation be achieved when a...Ch. 2 - What does the term trip-free mean as it relates to...Ch. 2 - Prob. 5SQCh. 2 - Prob. 6SQCh. 2 - Prob. 7SQCh. 2 - Prob. 8SQCh. 2 - Select the best answer for each of the following....Ch. 2 - Select the best answer for each of the following....
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- What would be the ground fault/ short circuit protection using an inverse time circuit breaker for 240 volt 5 hp motor with 75 temperature? a. 40amps b. 50 amps c. 60 amps d. 70 ampsarrow_forwardWhat is the name of the device shown below? CE O a. DC regulated powersunpy: Ob.C.R.O Oc. Control Panel Od.Function Generatorarrow_forwardExplain all part and its working in motion control lamp diagramarrow_forward
- What is a starterarrow_forwardA motor starter contains protection devices to prevent an overcurrent condition in the motor's circuit. These devices are known as A. thermal overloads. B. circuit breakers. C. thermal links.D. fuses.arrow_forwardUsing the following control devices draw an electrical circuit that will manage the direction of rotation of the DC motor. With the pushbutton in its normal state, the motor should be rotating in one direction. Actuating the pushbutton should reverse the motor’s direction of rotation. 1) Circuit diagram:arrow_forward
- What is a limit switch?arrow_forward10. A type of resistance device that can be placed in a DC motor circuit and varied to limit the speed of amotor is called aA. variable reluctor.B. rheostat.C. power resistor.arrow_forward1. Explain what are Temperature sensors and how does it work. 2. Explain what are Magnetic Switches and how does it work.arrow_forward
- Complete the information in the table about rotary switch 8 way and micro switcharrow_forwardQUESTION 12 The proper way to determine the required over-current protection is to: determine the FLA based on the nameplate. Use the standard rule of thumb that the over-current protection shall be 7 to 10x the locked rotor amps. determine the watts by converting the HP rating on the nameplate to watts. to determine the FLC by looking up the value in the appropriate table(s) in the NEC as they relate to the horsepower of the motor.arrow_forwardHow is the combined pump–motor efficiency of a pump and motor system defined? Can the combined pump–motor efficiency be greater than either the pump or the motor efficiency? Explain.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 Learning
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning