Electric Motors and Control Systems
2nd Edition
ISBN: 9780073373812
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 3.2, Problem 8RQ
To determine
The reason for placing a fuse in series with the primary coil winding that protects both the primary and secondary coil winding circuits from excessive current.
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Students have asked these similar questions
The load on the outdoor coil influenced by?
-The location of the indoor coil
-The outdoor temperature and the evaporator heat load
-the voltage supplied to the unit
-all the above factors
What happens when the low-voltage current flow in the coil primary winding is interrupted by the switching device?
The primary winding delivers a high-voltage spark to the plugs.
The magnetic field in the coil primary builds.
The secondary voltage drops to zero volts.
High voltage is induced in the secondary windin
Chapter 3 Solutions
Electric Motors and Control Systems
Ch. 3.1 - Prob. 1RQCh. 3.1 - a. If 1 MW of electric power is to be transmitted...Ch. 3.1 - Compare the type of AC power normally supplied to...Ch. 3.1 - a. Outline the basic function of a unit...Ch. 3.1 - list three factors taken into account in selecting...Ch. 3.1 - When motors and motor controllers are installed,...Ch. 3.1 - a. What types of conduit raceways are commonly...Ch. 3.1 - Compare the function of a switchboard, panelboard,...Ch. 3.2 - Define the terms primary and secondary as they...Ch. 3.2 - On what basis is a transformer classified as being...
Ch. 3.2 - Explain how the transfer of energy takes place in...Ch. 3.2 - In an ideal transformer, what is the relationship...Ch. 3.2 - A step-down transformer with a Wins ratio of 10:1...Ch. 3.2 - A step-up transformer has a primary current of 32...Ch. 3.2 - What is meant by the term transformer magnetizing,...Ch. 3.2 - Prob. 8RQCh. 3.2 - Prob. 9RQCh. 3.2 - Prob. 10RQCh. 3.2 - The primary of a transformer is rated for 480 V...Ch. 3.2 - A single-phase transformer is rated for 0.5 kVA, a...Ch. 3.3 - Explain the way in which the high-voltage and...Ch. 3.3 - Prob. 2RQCh. 3.3 - Prob. 3RQCh. 3.3 - Prob. 4RQCh. 3.3 - Prob. 5RQCh. 3.3 - Prob. 6RQCh. 3.3 - Prob. 7RQCh. 3.3 - Prob. 8RQCh. 3.3 - Explain the basic difference between the primary...Ch. 3.3 - Prob. 10RQCh. 3.3 - Prob. 11RQCh. 3.3 - Prob. 12RQCh. 3.3 - What important safety precaution should be...Ch. 3.3 - Prob. 14RQCh. 3.3 - The control transformer for an across-the-line...Ch. 3.3 - The two primary windings of a dual-primary control...Ch. 3.3 - Prob. 3TCh. 3.3 - A dry-type general-purpose power transformer is...Ch. 3.3 - A current transformer is to be tested in circuit...Ch. 3.3 - Discuss how electric power might be distributed...Ch. 3.3 - A block of several transformers arc fed from...Ch. 3.3 - How would you proceed with a DC resistance check...Ch. 3.3 - Prob. 5DT
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Similar questions
- What size overcurrent device should be used to protect the primary of a 480/120 volt 15 kVA transformer?arrow_forwardIf dual-element time-delay fuses are to be used as the short-circuit protective device, what size fuses should be used to protect the circuit in question #12?arrow_forwardIf an alternator is used to provide variable frequency, how is the output voltage of the alternator controlled?arrow_forward
- Why should the secondary winding of a CT never be disconnected from its load when there is current flow in the primary?arrow_forwardThe large interconnecting line between the indoor and outdoor coil is the _____line.arrow_forwardA delta connection has 30 A of current flowing through each phase winding. How much current is flowing through each of the lines supplying power to the load?arrow_forward
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