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Electrical Transformers and Rotating Machines

ISBN: 9780766805798 | 0766805794
Edition: 1st
Format: Paperback
Publisher: Cengage Learning
Pub. Date: 8/7/1998

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SummaryTable of Contents
This book is an excellent resource for electrical students and professionals who need a comprehensive explanation of theory and practical applications of electrical machines. The book includes nine experiments enabling readers to reinforce the theory discussed earlier. Students begin wiht single-phase isolation transformers and progress through 3-phase transformers and single and 3-phase motors. Features: -quick access to information on single and three phase transformers, DC generators and motors makes this an ideal book for those in the elect... MORE
Prefaceix
Unit 1 Single-Phase Isolation Transformers
1(57)
Transformer Formulas
2(2)
... MORE
Isolation Transformers
4(54)
Unit 2 Autotransformers
58(10)
Determining Voltage Values
59(2)
Using Transformer Formulas
61(2)
Current Relationships
63(5)
Unit 3 Current Transformers
68(11)
Clamp-On Ammeters
73(6)
Unit 4 Three-Phase Circuits
79(28)
Three-Phase Circuits
80(2)
Wye Connections
82(4)
Delta Connections
86(2)
Three-Phase Power
88(1)
Watts and VARs
89(1)
Three-Phase Circuit Calculations
89(9)
Load 3 Calculations
98(1)
Load 2 Calculations
99(1)
Load 1 Calculations
100(1)
Alternator Calculations
101(1)
Power Factor Correction
101(6)
Unit 5 Three-Phase Transformers
107(26)
Three-Phase Transformers
108(5)
Closing a Delta
113(1)
Three-Phase Transformer Calculations
114(6)
Open-Delta Connection
120(13)
Unit 6 Single-Phase Loads for Three-Phase Transformers
133(10)
Closed Delta with Center Tap
138(1)
Closed Delta without Center Tap
139(1)
Delta-Wye Connection with Neutral
139(4)
Unit 7 Transformer Installation
143(15)
Transformer Protection
143(1)
Determining Interrupting Rating
144(3)
Determining Transformer Fuse or Circuit Breaker Size
147(4)
Overcurrent Protection for Autotransformers
151(1)
Determining Conductor Size for a Transformer
152(6)
Unit 8 Transformer Cooling
158(11)
Air-Cooled Transformers
158(4)
Liquid-Cooled Transformers
162(7)
Unit 9 Transformer Maintenance
169(14)
Safety Procedures
170(1)
Entering a Transformer Tank
171(1)
Maintenance of Small Control Transformers
171(3)
Large Control Transformers Supplying a Motor Control Center
174(1)
Small Dry-Type Transformers for Commercial and Industrial Use
174(1)
Large Industrial Dry-Type Transformers for Use in Unit Substations
175(1)
Media-Cooled Transformers
176(1)
Pad-Mounted Air-Cooled Transformers
177(1)
Internal Inspection and Maintenance
178(1)
Insulation Testing
178(2)
Oil Testing
180(3)
Unit 10 Harmonics
183(13)
Harmonic Effects
184(3)
Circuit Breaker Problems
187(1)
Buss Ducts and Panel Problems
188(1)
Determining Harmonic Problems on Single-Phase Systems
189(2)
Determining Harmonic Problems on Three-Phase Systems
191(1)
Dealing with Harmonic Problems
192(1)
Determining Transformer Harmonic Derating Factor
193(3)
Unit 11 Direct Current Generators
196(40)
What Is a Generator?
197(8)
Armature Windings
205(4)
Brushes
209(1)
Pole Pieces
209(1)
Field Windings
209(3)
Series Generators
212(3)
Shunt Generators
215(5)
Compound Generators
220(1)
Compounding
220(4)
Countertorque
224(1)
Armature Reaction
225(3)
Setting the Neutral Plane
228(2)
Fleming's Left-Hand Generator Rule
230(1)
Paralleling Generators
230(6)
Unit 12 Direct Current Motors
236(38)
DC Motor Principles
236(3)
Shunt Motors
239(4)
Series Motors
243(2)
Compound Motors
245(2)
Terminal Identification for DC Motors
247(1)
Determining the Direction of Rotation of a DC Motor
248(3)
Speed Control
251(2)
Field Loss Relay
253(2)
Horsepower
255(2)
Brushless DC Motors
257(3)
Converters
260(1)
Permanent Magnet Motors
260(8)
Right-Hand Motor Rule
268(6)
Unit 13 Alternators
274(17)
Three-Phase Alternators
274(4)
The Rotor
278(1)
The Brushless Exciter
278(3)
Alternator Cooling
281(1)
Frequency
282(1)
Output Voltage
283(1)
Paralleling Alternators
284(3)
Sharing the Load
287(1)
Field Discharge Protection
287(4)
Unit 14 Three-Phase Motors
291(54)
Three-Phase Motors
292(1)
The Rotating Magnetic Field
292(1)
Synchronous Speed
292(5)
Connecting Dual-Voltage Three-Phase Motors
297(6)
Squirrel-Cage Induction Motors
303(15)
Three-Speed Consequent Pole Motors
318(5)
Four-Speed Consequent Pole Motors
323(1)
Wound Rotor Induction Motors
323(7)
Synchronous Motors
330(7)
Selsyn Motors
337(8)
Unit 15 Single-Phase Motors
345(51)
Single-Phase Motors
345(1)
Split-Phase Motors
346(2)
Resistance-Start Induction-Run Motors
348(7)
Capacitor-Start Induction-Run Motors
355(2)
Dual-Voltage Split-Phase Motors
357(3)
Determining Direction of Rotation for Split-Phase Motors
360(1)
Capacitor-Start Capacitor-Run Motors (Permanent-Split Capacitor Motors)
361(3)
Shaded-Pole Induction Motors
364(3)
Multispeed Motors
367(2)
Single-Phase Synchronous Motors
369(2)
Repulsion Motors
371(1)
Construction of Repulsion Motors
372(3)
Repulsion-Start Induction-Run Motors
375(3)
Repulsion-Induction Motors
378(1)
Stepping Motors
379(9)
Universal Motors
388(8)
Unit 16 Motor Maintenance and Troubleshooting
396(18)
Motor Bearings
397(1)
Direct Current Machines
397(5)
Testing Alternating Current Motors
402(2)
Testing Dual-Voltage Motors
404(10)
Unit 17 Motor Installation
414(27)
Determining Motor Current
415(4)
Determining Conductor Size for a Single Motor
419(2)
Overload Size
421(2)
Determining Locked-Rotor Current
423(2)
Short-Circuit Protection
425(6)
Multiple Motor Calculations
431(10)
Laboratory Experiments
441(66)
Experiment 1 Transformer Basics
442(5)
Experiment 2 Single-Phase Transformer Calculations
447(7)
Experiment 3 Transformer Polarities
454(9)
Experiment 4 Autotransformers
463(6)
Experiment 5 Three-Phase Circuits
469(4)
Experiment 6 Three-Phase Transformers
473(16)
Experiment 7 Rotating Magnetic Field
489(2)
Experiment 8 Three-Phase Dual-Voltage Motors
491(9)
Experiment 9 Single-Phase Dual-Voltage Motors
500(7)
Appendix A Greek Alphabet507(1)
Appendix B Metals508(2)
Appendix C Full-Load Current Direct Current Motors510(1)
Appendix D Full-Load Current Alternating Current Single-Phase Motors511(1)
Appendix E Full-Load Current Alternating Current Three-Phase Motors512(2)
Appendix F NEMA Design Codes for Three-Phase Squirrel-Cage Motors514(2)
Answers to Practice Problems516(3)
Glossary519(8)
Index527

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