Electric Motor Control
Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
bartleby

Videos

Textbook Question
Book Icon
Chapter 20, Problem 1SQ

Using the schematic diagram in Figure 20–23, determine the number of control wires needed to control the three-phase motor. Use the terminal and wire identification shown in the schematic as well as proper power circuit identification.

Chapter 20, Problem 1SQ, Using the schematic diagram in Figure 2023, determine the number of control wires needed to control

FIG. 20–23

Expert Solution & Answer
Check Mark
To determine

Calculate the number of control wires required to control the three-phase motor in Figure 20–23.

Explanation of Solution

The 3 wires are connected to the externally operated disconnect switch, and the switch is connected to pull box through 3 wires. Four wires are used to connect stations 1 and 2. Four wires and three wires are used to connect station 2 and station 3 to pull box, respectively. The pull box is connected to motor starter using 6 wires, and finally, starter is connected to a three-phase motor using 3 wires. Redraw the given figure with the representation of the required control wires as shown in Figure 1.

Electric Motor Control, Chapter 20, Problem 1SQ

Conclusion:

Thus, the number of control wires required to control the three-phase motor in Figure 20-23 is calculated.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Q1/Sketch the root locus for the system shown in Figure 1 and find the following: a. The exact point and gain where the locus crosses the jo-axis b. The breakaway point on the real axis c. The range of K within which the system is stable d. Angles of departure and arrival R(s) + K(s²-4s +20) C(s) (s+2)(s + 4)
Exam2 Subject: (Numerical Analysis) Class: Third Date: 27/4/2025 Time: 60 minutes Q1. For what values of k does this system of equations has no solution? (use Gauss-Jordan eliminations) kx + y + z = 1 x+ky + z = 1 x+y+kz=1
Consider the Difference equation of a causal Linear time-invariant (LTI) system given by: (y(n) - 1.5y(n - 1) + 0.5y(n = 2) = x(n) a) Implement the difference equation model of this system. b) Find the system transfer function H(z). c) For an input x(n) = 8(n), determine the output response y(n). d) Verify the initial value theorem y(0) with part (c).

Chapter 20 Solutions

Electric Motor Control

Knowledge Booster
Background pattern image
Electrical Engineering
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Electric Motor Control
Electrical Engineering
ISBN:9781133702818
Author:Herman
Publisher:CENGAGE L
Types of Protective Relays and Design Requirements, Part 1a.; Author: GeneralPAC: Power System Tutorials;https://www.youtube.com/watch?v=JYil4T5VSDM;License: Standard Youtube License