Electrical Engineering Interview Questions

Electrical Engineering Interview Questions

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BRAINWAVE

The power to make you an IITian



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Electric Motors and Drives

Electric Motors and Drives Technical Manual

Table of Contents

Section Title Page
Motor Specifications
1.1 Nameplate 1
1.2 Insulation Class 3
1.3 Enclosure Type 11
1.4 Temperature Class 19
1.5 Mounting 30
1.6 Manufacturer’s Identification Number 51
1.7 Terminal Markings 55
1.8 Motor Design 67
1.9 Types of Duty 76
General Characteristics
2.1 System Nominal Voltage 103
2.2 Voltage 104
2.3 Power Factor 112
2.4 Efficiency 113
2.5 Speed 118
2.6 Vibration Characteristics and Balancing 119
2.7 Bearings 141
2.8 Torque 170
Asynchronous Motor Starting Systems
3.1 Starting Methods 175
3.2 Single-phase Motor Starting 187
Motor Protection and Coordination
4.1 Motors Protection 193
4.2 Protection Against Short Circuits 194
4.3 Protection Against Overload 203
4.4 Multifunction Relays 212
4.5 Motor Circuit Breakers 215
Motor Starter Co-ordination
5.1 Concepts 219
5.2 Solutions 220
5.3 Motor Overload Protection 229
5.4 Terminology 241
Motor Efficiency
6.1 Repair-Replace Decision Model 246
6.2 Premium EfficiencyMotors 262
Installation, Testing, and Maintenance
7.1 Installation and Maintenance 273
7.2 Description of Routine Tests 309
7.3 Recommended Winding Tests 321
7.4 Other Tests 322
7.5 Motor Starting Capabilities and Considerations 323
7.6 Maintenance and Reliability 328
7.7 Maintenance Programs 332
7.8 Machinery Condition Monitoring 334
7.9 Maintenance Planning 338

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Power Transformer

2010 Edition Power Transformers Technical Manual

Table of Contents
Introduction
Transformer Core
Transformer Winding
Transformer Insulation (Solid)
Transformer Insulation (Fluid)
Transformer Tanks & Accessories
Transformer Specifications
Reading and Applying Nameplate Information
Transformer Connections
Over current Protection
Overvoltage Protection
Protective Relays
Philippine Electrical Code Provisions on Transformer
Protection
Field testing of Power Transformers
Factory Acceptance Testing of Power Transformers
Appendix
A Comparative Study of IEC 76 and ANSI C57.12
On Transformers

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Handbook of Photovoltaic Science and Engineering

Handbook of Photovoltaic Science and Engineering

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Engineering Electromagnetism

Engineering Electromagnetics

Contents

1. Vector Analysis 1

2. Coulomb’s Law and Electric Field Intensity 26

3. Electric Flux Density, Gauss’s Law, and Divergence 48

4. Energy and Potential 75

5. Conductors and Dielectrics 109

6. Capacitance 143

7. The Steady Magnetic Field 180

8. Magnetic Forces, Materials, and Inductance 230

9. Time-Varying Fields and Maxwell’s Equations 277

10. Transmission Lines 301

11. The Uniform Plane Wave 367

12. Plane Wave Reflection and Dispersion 406

13. Guided Waves 453

14. Electromagnetic Radiation and Antennas 511

Appendix A Vector Analysis 553

Appendix B Units 557

Appendix C Material Constants 562

Appendix D The Uniqueness Theorem 565

Appendix E Origins of the Complex Permittivity 567

Appendix F Answers to Odd-Numbered Problems 574

Index 580

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