Electric Motors and Control Systems
2nd Edition
ISBN: 9780073373812
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Question
Chapter 3.3, Problem 14RQ
To determine
The value of the current flow in the primary.
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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
- A CT has a current flow of 80 amperes in its primary winding and a current of 2 amperes in its secondary winding. What is the ratio of the CT?arrow_forwardWhat are the three types of opposition to current flow that impedance represents?arrow_forwardFour inductors, each having an inductance of 0.6 H, are connected in series. What is the total inductance of the circuit?arrow_forward
- The two popular operating voltages for residences are ______V and _____V.arrow_forwardA 10kW, 120V-DC series generator has an armature resistance of 0.1 ohms and a series field resistance of 0.05 ohms. Assuming that it is delivering rated current at rated speed, find the a) armature current and b) induced emf. (Write only the value without the unit) la = Blank 1 A Ea = Blank 2 V (Round-off to 2 decimal places)arrow_forwardA load impedance of 52 Ω is connected to the secondary winding of the transformer in question 3. How much current will flow in the secondary?arrow_forward
- An inductor has an inductance of 0.025 H and a wire resistance of 3 Ω. How long will it take the current to reach its full Ohm’s law value?arrow_forwardA 10 kVA transformer has a primary voltage rating of 240 volts and a secondary voltage rating of 480 volts. The transformer is connected to a circuit protected by a 100 ampere circuit breaker. The secondary is protected by a 25-ampere fuse. Does the primary require separate overcurrent protection?arrow_forwardQuestion 7 In no-load phasor diagram of the transformer, the core loss component current is with primary voltage. Not yet answered O out of phase & parallel Marked out of O Parallel & in phase 1.00 P Flag question O in phase O Perpendicular & in phase Question 8 In an A.C. circuit, the power measured by using wattmeter is power. Not yet answered Marked out of 1.00 P Flag question Question 9 In step up transformer, secondary turns are less than primary turns. Not yet answered Marked out of Select one: 1.00 P Flag question O True O Falsearrow_forward
- 34. Four 10 mH inductors are in series. The total inductance is ( a) 40,000 μΗ (b) 40 mH (c) 30 H (d) none of abovearrow_forwardMatch the following: Alternating current Alternations Cycle Half cycle Period a. One alternation b. The positive and negative transitions c. Any current that periodically changes direction d. The complete transition through one positive alternation and one negative alternation e. The time required to complete one cycle of an AC waveformarrow_forwardA transformer has a turns ratio of 2;1. What is the peak secondary voltage if 115 Vrms is applied to the primary winding? O 81.3 V O 230 V O 57.5 V O 325 Varrow_forward
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