Connect 1 Semester Access Card For Electric Motors And Control Systems
2nd Edition
ISBN: 9781259550195
Author: Petruzella, Frank
Publisher: MCGRAW-HILL HIGHER 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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Chapter 3 Solutions
Connect 1 Semester Access Card For 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
- For 4 pole d.c machine armature winding with a double layer progressive simplex wave winding with 23 number of slots answer the following: a How many coils are present? b What is the coil span in terms of number of slots? c What is commutator pitch in terms of commutator segments? d How many coils are there between two consecutive commutator segments? e How many parallel paths are present?arrow_forwardIs this armature winding a progressive or a retro-progressive winding? W N Select one: 2 B 4' O a. Both O b. Progressive OC. Neither O d. Retro-progressive B Sarrow_forwardA four-pole lap-wound DC machine armature has 54 slots with single-turn coils. How many armature conductors are required if there are two coil sides per slot?arrow_forward
- Draw the developed diagram for the stator winding of a 3-ph, 2-pole I.M. The winding is double layer with full pitch coil. The number of slots are 2 per pole per phase. Show the direction of current in various phasesarrow_forwardThe circuit for a 20-kVA, 220/3960 V, 50-Hz transformer is shown in Figure (1). The open- circuit test and the short-circuit test was performed on this transformer and the following data were taken: Open-Circuit test: Voc=240 V, Ioc=2.8 A, Poc=260 W Short-Circuit test: Vsc = 350 V, Isc=7.6 A, Psc = 420 W 1) Find the values of Rc, XM, Rp and Xs for this transformer. 2) Find the equivalent circuit of this transformer referred to the high-voltage side and draw the circuit. j 0.163 Q jXM 0.02 02 jXsarrow_forwardDesign a winding diagram given the following specifications. Simplex Lap Progressive Winding No. of Poles = 4 Turn/coil = 1 • Conductor/Slot = 2 No. of Commutator Segments = 28 No. of Slots = 28arrow_forward
- For a four pole, 16 slot armature with two coil-side/slot having wave connected progressive winding has single turn coils has simplex winding. The number of current paths is?arrow_forward8.a. The type of coil usually used in power transformers rated at less than 15,000 volts is theA. shell-form coil.B. core-form coil.C. disk coil.D. cylindrical coil.8.b. In large power transformers, the unequal voltage distribution caused by voltage surges in the winding isprevented by the use ofA. series capacitors.B. parallel inductances.C. static shields.D. low-voltage arresters.arrow_forwardLaminated insulations coated with varnish are normally used in the transformer? A. to reduce reluctance of magnetic path B. to reduce the effect of eddy current C. to increase the reluctance of magnetic path D. to reduce the hysteresis effectarrow_forward
- construct an winding diagram with -4 poles-26 conductors-double layer-simplex wave winding, 2 brushesarrow_forward13.a. Eddy-current loss in the stator core can be reduced by usingA. alloys with low resistivity.B. annealed iron laminations.C. silicon alloys of copper.D. thin laminations of steel.13.b. Which one of the following is damaging to many insulating materials used in alternators?A. Eddy currentsB. SaturationC. CoronaD. Hysteresisarrow_forwardFigure Ql shows a two-legged iron core with air gap on the middle leg. Primary winding and secondary winding are placed around the left and right legs respectively. Nı and N2 are the number of turns of the primary and secondary windings, respectively. The primary current (In) is supplied to the primary winding with the direction indicated in the diagram. Primary Winding Secondary Winding Figure Ql: Two-legged iron core The fringing effect of the air gap plays a role in the flow of the magnetic flux through the secondary winding. Explain how the fringing effect of the air gap can affect the voltage induced across the secondary winding. The explanation should be supported with a relevant equation. |arrow_forward
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