Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Textbook Question
Chapter 16, Problem 6SQ
Why should electrical contacts never be permitted to open or close slowly?
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Chapter 16 Solutions
Electric Motor Control
Ch. 16 - What are some applications of temperature-actuated...Ch. 16 - How is the average electrician involved with...Ch. 16 - Should a metal be heated or cooled to make it...Ch. 16 - Prob. 4SQCh. 16 - Prob. 5SQCh. 16 - Why should electrical contacts never be permitted...Ch. 16 - Prob. 7SQCh. 16 - Prob. 8SQCh. 16 - Why are thermistors often used as solid-state...Ch. 16 - What type of chemical is used to cause a pressure...
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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
- What type of pressure switch is generally used to sense small changes in low- pressure systems?arrow_forwardWhat type of switch would be used to open or close a set of contacts at a certain pressure?arrow_forwardWhat determines whether a pressure switch opens or closes on a rise of pressure?arrow_forward
- Why do contactor requires some form of arc suppressionarrow_forwardWhat do the terms normally open and normally closed refer to with regard to a switch or set of contacts? Draw a normally open and normally closed contact.arrow_forwardHow would switches used as safety devices be connected with respect to the loads they are protecting?arrow_forward
- Select the best answer for each of the following. A single-break control is a a. heavy-duty selector switch. b. single-circuit push button. c. standard-duty selector switch. d. double-circuit push button.arrow_forwardwe are interested in an automatic garage gate system for a building. This system includes a gate that goes up or down, a motor to actuate the gate (pull, push) and sensors to collect information (gate open contact, gate closed contact). The sensors are all similar, each signaling to its controller that a contact has taken place. The user has a remote control to control with just two buttons: open, close. The operating principle of the system is as follows. Suppose the gate is closed. The user opens the gate by pressing the Open button on his remote control. He can stop opening by pressing the Open button again, the motor stops. Otherwise, the gate opens completely and triggers a Gate Open sensor which causes the motor to stop. Pressing the Close button causes the gate to close if it is open (partially or fully). The closing can be stopped by pressing the Close button again, the motor stops. Otherwise, the gate closes completely and triggers a Gate Closed sensor which causes the engine…arrow_forwardHow is the average electrician involved with electronic temperature controls?arrow_forward
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