Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 9, Problem 8SQ
Connect the following components in Figure 9–18:
- a. Start push button to the timer coil
- b. Load 1 to NCTC
- c. Load 2 to NOTO
- d. Show proper symbols
FIG. 9–18
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Chapter 9 Solutions
Electric Motor Control
Ch. 9 - List several applications for a motor-driven...Ch. 9 - Which timer is the most commonly used in...Ch. 9 - How is a pneumatic timer adjusted?Ch. 9 - List six factors to be considered when selecting a...Ch. 9 - List several additional factors that will affect...Ch. 9 - Prob. 6SQCh. 9 - Connect these components in Figure 917: a. The...Ch. 9 - Connect the following components in Figure 918: a....
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- Connect these components in Figure 917: a. The start push button on the timer coil b. Load 1 to NOTC c. Load 2 to NCTO d. Show proper symbols FIG 917arrow_forwardSelect the best answer for each of the following. Thermal overload protection a. aids motor warm-up. b. prevents motors from freezing. c. protects motors and conductors from mechanical damage. d. provides overcurrent protection for motors.arrow_forward6.a. Arcing in manual starters is eliminated by the use ofA. overload relays.B. nonconductive contacts.C. blowout coils.D. spring-loaded handles.6.b. Chattering of AC contactors is prevented byA. blowout coils.B. air gaps.C. secondary windings.D. shading poles.arrow_forward
- I want Correct Solution. Double check What is the peak time of the following systems?arrow_forward9. When you're taking a PM motor apart you should exercise special care not to damage theA. brush holders.B. commutator.C. permanent magnets.arrow_forwardDetermine the value of R1 that will ensure proper turn-on and turn-off for the following values: eta = 0.33, valley voltage at 0.8V, valley current at 15 mA, peak current at 35 micro Amperes, and peak voltage at 18V.arrow_forward
- By using 1 push button NC + 2 push buttons N and two contactors that are activated using DC, draw a circuit for run forward, run reverse, and stop!Please explain clearlyarrow_forwardCalculate the coil pitches and indicate the slots into which the first coil should be placed for the following armature windings: (a) 36 slots, four poles; (b) 76 slots, six poles; (c)270 slots, 10 poles. (Our lesson is DC GENERATORS in the subject ELECTRICAL MACHINE 1) PLEASE GAVE ME A CLEAN ANSWER AND SOLUTION. THANK YOUarrow_forward25.a. There are two wires labeled P1 and P2 at a DC motor's junction box. These wires will attach to whatinternal component of the motor?A. A speed potentiometerB. The parallel windingC. GroundD. A thermostat25.b. As you walk up to a machine, you see a technician tapping on the back section of a DC motor with alead mallet. This technician isA. cleaning the commutator.B. checking for end bell cracks.C. looking for weak or worn brushes.D. reseating the rear end bell on the case.arrow_forward
- A control relay with an inrush current and hold-in current of 9A and 2A respectively.If the coil resistance is equal to 135 ohms.Then calculate 2)The coil voltage rating 3)The VA inrush rating. Another question: multiple choices: When the contacts of a timer changes state after the coil is de-energised for a period of time,it is called a?: A)TDOFF B)TDON C) Electromechanical timer D)Electropneounomatic timerarrow_forwardCalculate the reactance voltage for a machine which runs at 900rpm number of commutator segments is 65, brush width is 1.74 (in commutator segments), coefficient of self induction is 153 the conductor current is 27A.arrow_forwardTOPIC: Thyristors and Phase Control Describe and Explain what occurs in each of these circuits when the pushbutton switch is actuated and released.arrow_forward
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