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EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Question
Chapter 40, Problem 3RQ
To determine
The current rating that must be used while sizing the overload heaters when the name plate of a part wining motor indicates the full load current of 72 amperes.
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EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
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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_forwardIs the resistance in the start winding greater or less than the resistance in the run winding?arrow_forward
- What conditions must be met before two alternators can be paralleled together?arrow_forwardRefer to Figure 211 to answer the following questions. How much voltage will be applied to coil 1CR when it is energized?arrow_forwardState the physical differences between a run and a start capacitor.arrow_forward
- A wye-connected load has a phase current of 25 A. How much current is flowing through the lines supplying the load?arrow_forwardWhat is the function of the compensating winding?arrow_forwardA three-phase motor nameplate indicates a full load current of 362 amperes. The nameplate indicates that the heaters are to be sized for 125% of motor full load current. Current transformers with a ratio of 600:5 are used to reduce the motor current. Using the chart shown in Figure 4–7B, determine the size of overload heaters needed to protect this motor.arrow_forward
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