Understanding Motor Controls
3rd Edition
ISBN: 9781305498129
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 27, Problem 3RQ
To determine
The current rating to be used when sizing the overload heaters.
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the purpose of over load protection on a motor is to protect the
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Understanding Motor Controls
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- The motor nameplate of a wye-delta started motor has a full load current of 287 amperes. What current rating should be used to determine the proper overload heater size?arrow_forwardA large motor has a full load current rating of 425 amperes. Current transformers with a ratio of 600:5 are used to reduce the current to the overload heaters. What should be the full load current rating of the overload heaters?arrow_forwardHow is the speed of a consequent pole squirrel-cage motor changed?arrow_forward
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