Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 5, Problem 12SQ
To determine
Explain what the code letter on a motor nameplate indicates.
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To what does the code letter on a motor nameplate referencia?
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ENUMERATION. List down or enumerate what are asked for in each number.
1. Common types of light sources.
2. Classes of motor starters.
3. Classification of electric motors
4. Branch circuit classification.
5. Factors in selecting service conductors.
6. Factors in selecting generator
Chapter 5 Solutions
Electric Motor Control
Ch. 5 - In which diagram do the physical locations of the...Ch. 5 - Which diagram conveys as much information as...Ch. 5 - Prob. 3SQCh. 5 - Which control wiring scheme can cause damage to...Ch. 5 - In developing line or wiring diagrams, in which...Ch. 5 - In which control circuit wire are the overload...Ch. 5 - The control circuit is connected to which lines...Ch. 5 - Prob. 8SQCh. 5 - The contactor coil is connected to which line of a...Ch. 5 - What does the X or 1 mean on a target table?
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- 10.a. A normal commutator will have which one of the following colors where the brushes contact thecommutator?A. Slate-grayB. Chocolate-brownC. Auburn-brownD. Black 10.b. If an electronic control system is starting a motor, it will keep start-up current within limits by usingA. an acceleration ramp.B. coast-up system.C. a rheostat and a relay.D. a pulsed diode control.arrow_forwardQUESTION 13 The resistance of the Armature's conductor coil(s) in most motors is: quite high, usually a few thousand ohms or more depending on the size of the motor. Typically an open circuit value on most multimeters quite low, usually a few ohms or less depending on the size of the motor. very high, usually in the megaohms.arrow_forwarda" printed-circuit motor" is another term for a _________motor.arrow_forward
- Question 2: What is the "power swing"? Explain, how power swings may affect the operation of the distance protection relay. Describe the corresponding function of the distance relay against adverse situations caused by power swings.arrow_forwardWhen selecting motor overload protection devices from where is the full load ampere rating taken?arrow_forwardWith the aid of block diagram/circuit connection and relevant equations, describe the working principle of following systems. Emphasis should be given on usage of power electronic converter in the system. Uninterrupted Power Supply(UPS). 2. C Motor Drive.arrow_forward
- The pointer moving across a scale in the speedo meter is an example for ___________ of the instrumentation system. a.Feed back element b.Sensing element c.Data presentation element d.Signal conditioning elementarrow_forward8.a. Which of the following most accurately describes the difference between a contactor and a starter?A. A starter contains a contactor and some additional protective circuitry.B. A starter is always mounted in an enclosure.C. A starter contains reversing contacts.D. A starter is always three-phase while a contactor may be single-phase or three-phase.8.b. The main bus in a motor control center is used toA. reduce the possibility of overload with large loads.B. enclose motors within a protective shield.C. distribute power to all starters in the center.D. reduce the voltage of the plant's supply.arrow_forwardA 460VAC rated, 60 Hz, 125-Hp Three-phase induction type motor is to be connected for across-the-line starting. The nameplate indicates the motor’s maximum ampere rating, 160A. It has a NEMA code letter B. The ambient temp of the installation place is and TW copper will be used. Short-circuit protection device that will be used is Inverse Time Breaker. Calculate the Motor Starter Size.arrow_forward
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