Duration 5 Days

Introduction

The focus of this 5-day class is to present a comprehensive overview of electrical theory and principles related to the operation of AC and DC rotating machines, (motors, generators, and alternators). The course will expand basic technical skills related to fundamental concepts while at the same time introducing more advanced topics. Various types of AC and DC motors are discussed during the class giving participants practical solutions to every day field-related problems. A comparison between motors and generators is emphasized as it relates to installation, troubleshooting, maintenance, and testing.
Methods of starting, braking, and controlling the speed of motors is covered as well as correct safety procedures in compliance with NFPA 70E

Who Should Attend

Maintenance supervisors, personal are advised to attend this course.

Course Objectives

1- Understanding methods of starting, braking, and controlling the speed of motors.

2- Applying safety procedures in compliance with NFPA 70E

3- Recognize motor failure causes

4- understanding NFPA 70B Requirements for Motor Testing

Course outline

1. Basic Theory and Fundamentals
2. Magnetism
3. Fundamental Properties
4. Force between Magnetic Poles
5. Magnetic Fields and Flux
6. Electro-Magnetism
7. Electric Current and Magnetism
8. Coils (Inductors)
9. Electromagnetic Induction
10. AC Motor Theory and Construction
11. The Rotating Magnetic Field
12. Types of AC Motors
13. Three-Phase Motors
14. Induction Motors
15. Wound-Rotor Motors
16. Synchronous Motors
17. Single-Phase Motors
18. Motor Data
19. Electrical Rating
20. Power Rating
21. NEMA Design Codes
22. Motor Protection
23. Overcurrent Protection
24. Overload Protection

III. AC Alternator Theory and Construction

1. Principles of Operation
2. Construction of Small Alternators
3. Alternator Controls
4. DC Motor Theory and Construction
5. Operating Theory
6. Construction
7. Self-Excited DC Motors
8. DC Generator Theory and Construction
9. Operating Theory
10. Construction
11. Separately Excited and Permanent Magnetic DC Generators
12. Self-Excited DC Generators
13. AC and DC Motor Control
14. Starting Methods
15. Braking Methods
16. Multi-Speed Motors
17. Adjustable-Speed Motors
18. Mechanical Drive Systems

VII. AC Motor Maintenance and Troubleshooting

1. Visual Inspection
2. Mechanical Maintenance
3. Bearings
4. Alignment
5. Motor Failure Causes
6. Control Circuit Troubleshooting
7. Nameplate Information
8. Motor Winding Identification
9. Wye Identification and Connection
10. Delta Identification and Connection
11. NFPA 70B Requirements for Motor Testing
12. Motor Rotation Test
13. Insulation Test
14. Surge Test

VIII. Final Exam and Paperwork