Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 23, Problem 5RQ
To determine
The method used to disconnect the pick-up coil of a DC contactor.
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What happens when the low-voltage current flow inthe coil primary winding is interrupted by the switchingdevice?a. The magnetic field collapses.b. A high-voltage is induced in the coil secondarywinding.c. Both a and b.d. Neither a nor b
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Understanding Motor Controls
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- Why should the secondary winding of a CT never be disconnected from its load when there is current flow in the primary?arrow_forwardA wye-connected load has a phase current of 25 A. How much current is flowing through the lines supplying the load?arrow_forwardIs the resistance in the start winding greater or less than the resistance in the run winding?arrow_forward
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