Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 23, Problem 1SQ
What is the safety feature of a lock-stop push button?
Expert Solution & Answer
To determine
Describe about the safety feature of a lock-stop push button.
Explanation of Solution
Description:
A control circuit of a lock-stop push button can be padlocked in the off position. Due to this, it is difficult for anyone to start a machine. In an emergency situation, a lock-stop push button can be used intentionally to stop the machine or equipment. If anyone unintentionally touches the push button, then the contact will not be released unless the push button reaches the lock position.
Conclusion:
Thus, the safety feature of a lock-stop push button is described.
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Students have asked these similar questions
When a push button is used for the function of start, how are the contacts generally wired?
Write the ladder code to make a "LAMP" turn on when pressing a "START" button, the lamp must follow the activation pattern:
turn on for 5 seconds, turn off for 10 seconds, turn on again for 5 seconds and then remain off.
Add an emergency stop (unlatch).
Your answer
Typed answers are easier for students to read than handwritten notes
What would be the purpose of using an OHA (off-hand-auto) switch instead of a standard HOA (hand-off-auto) switch?
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- Make a Wiring Diagram of Two – Station Start Stop Motor Control.arrow_forwardWhy should electrical contacts never be permitted to open or close slowly?arrow_forwardWrite the ladder code to make a "LAMP" turn on when pressing a "START" button, the lamp must follow the activation pattern: turn on for 5 seconds, turn off for 10 seconds, turn on again for 5 seconds and then remain off. Add an emergency stop (unlatch).arrow_forward
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