Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Question
Chapter 29, Problem 3SQ
To determine
State which contactor is utilized to close the transition in Figure 29-6.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Moving coil loudspeaker working principle
How long a wire is needed to coil a spring having a mean diameter of 1 inch if there are 8 active coils?
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 timer
Knowledge Booster
Similar questions
- Which of the following applies to an autotransformer starter with a five-pole starting contactor: open transition or closed transition? Locate in Figure 273.arrow_forwardWhy is it necessary to remove the jumpers in Figure 362 if limit switches are used? FIG. 362 Typical elementary diagram of a starter with two points of acceleration for a reversing wound rotor motor.arrow_forwardIn Figure 362, how many different interlocking conditions exist? Name them. Fig. 362 Typical elementary diagram of a starter with two points of acceleration for a reversing wound rotor motor.arrow_forward
- Choose the correct answer 1)A relay is the mechanical equivalent of a: (1) a) Thyristor; b) Diode; c) Transformer; d) Transistor. 2) Overload relays are classified as: (1) a) Electrical or mechanical; b) Thermal or magnetic; c) Analog or digital; d) Current or voltage.arrow_forwardQ1. Draw and label both the power and control circuits of a 3-phase direct-on-line(DOL) starter on an induction motorarrow_forwarda) What applications / experiments are necessary to find the Rc parameter in the equivalent circuit given in Figure 1? b) Write the value of the Ir 'current given in Figure 1 with a sentence in the idle running test of the 3-phase Asynchronous motor.arrow_forward
- What will happen in Figure 21–6 if limit switches are installed and the jumpers from terminals 6 and 7 to the coils are not removed? Herman, Stephen L.. Electric Motor Control (p. 201). Cengage Learning. Kindle Edition.arrow_forwardReferring to Figure 364, why is it not possible to remove all of the resistance from the secondary circuit? Fig. 364 Automatic acceleration of wound rotor motor using a simplified frequency relay system.arrow_forwardDetermine the minimum current for conductors required to connect a motor that has a full-load current of 46 A.arrow_forward
- A TRIAC phase control circuit has a load resistance of 70 and is powered by an AC source of 155 VRMS. With asymmetrical switching, determine the average load voltage in Volts. Assume α+ = 58 degrees and α- = 65 degrees. Express your answer in three decimal places.arrow_forward13.a. A control system that doesn’t return position or velocity information from the motor back to the controlsystem is called a/anA. differential system.B. translated position system.C. directional system.D. open-loop system.13.b. You’re looking at a tachometer feedback signal on an oscilloscope. The waveform takes a long time togo to zero volts. This means that the system isA. critically dampened.B. at high speed.C. reversing direction.D. overdampened.arrow_forwarda long shunt compound generator supplies 100A at a terminal voltage of 250V. the resistance of the armature, shunt field and series field are respectively 0.02,50 and 0.05 ohms. The bhp of the driving engine is 38. Calculate the total copper losses.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning
Electricity for Refrigeration, Heating, and Air C...
Mechanical Engineering
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Cengage Learning