Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 21, Problem 12SQ
Convert the control circuit only, Figure 21–11, from the wiring diagram to an elementary diagram. Include the limit switches (RLS, FLS) as operating in the control circuit.
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Why is the Limit Switch important?
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A. The pressure switch, temperature switch, and push button must be closed for the motor to start.
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Explain mounting arrangement and positioning of switch boards
Chapter 21 Solutions
Electric Motor Control
Ch. 21 - How is a change in the direction of rotation of a...Ch. 21 - Prob. 2SQCh. 21 - If a reversing control circuit contains...Ch. 21 - How is auxiliary contact interlocking achieved on...Ch. 21 - After the forward coil has been energized, is the...Ch. 21 - If a mechanical interlock is the only means of...Ch. 21 - If pilot lights are to indicate which coil is...Ch. 21 - What is the sequence of the operations if the...Ch. 21 - In place of the push buttons in Figure 214, draw a...Ch. 21 - From the elementary drawing in Figure 2110,...
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- Draw a control circuit with no-voltage protection. Describe how this method of wiring protects the machine operator.arrow_forwardGive the reason for the following statements: 1) Using a Venturi flow sensor makes the measurement error due to pressure loading is much lower.?2) For the measurement systems, the signal conditioning element is an important one.?3) Null-type AC Bridge can not be used for measuring the inductive impedance.?arrow_forwardWhat are some applications of temperature-actuated switches?arrow_forward
- How many wires are required for a two-wire control device?arrow_forward4. A control system in which the manipulator variable, the control variable for the operation of the system is human is called.... a. Automatic control systemb. Open circuit control systemc. Loop control systemd. Manual control systeme. Closed circuit control systemarrow_forward
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