Standard |
ELT 111 - Single-Phase and Three-Phase
Motors
Introduces the fundamental theories and applications of single-phase and three-phase motors. Topics include: motor theory/operating principles, motor terminology, motor identification, NEMA standards, motor efficiencies, preventive maintenance, troubleshooting/failure analysis, and NEC requirements.
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Competency Areas |
Hours
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Motor Theory/Operating Principles |
Class |
5 |
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Motor Terminology |
D. Lab |
0 |
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Motor Identification |
P. Lab/O.B.I. |
1 |
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NEMA Standards |
Credit |
5 |
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Motor Efficiencies |
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Preventive Maintenance |
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Troubleshooting/Failure Analysis |
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NEC Requirements |
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Prerequisite: |
ELT 109 |
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Corequisite: |
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Course Guide |
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Competency |
After completing this
section, the student will: |
Hours |
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Class |
D.Lab |
P.Lab/ O.B.I. |
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MOTOR THEORY/OPERATING
PRINCIPLES |
10 |
0 |
3 |
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Components |
Identify basic components of an AC motor. |
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MOTOR TERMINOLOGY
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5 |
0 |
0 |
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Components |
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Operating characteristics |
List operating characteristics of single-phase and three-phase motors. |
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MOTOR IDENTIFICATION
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5 |
0 |
3 |
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Single phase motors |
Identify five principal types of single-phase motors: shaded pole, split phase, capacitor, repulsion, and series. |
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Induction motors |
Identify induction motor. |
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Connect fields of a three-phase motor for low or high voltage. |
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NEMA STANDARDS
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5 |
0 |
0 |
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Design motors |
Recognize NEMA design motors A-D. |
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NEMA enclosures |
Recognize NEMA enclosures. |
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Motor insulation |
Determine NEMA class for motor insulation in applications for variable temperatures. |
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MOTOR EFFICIENCIES |
5 |
0 |
0 |
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Motor efficiencies |
Calculate motor efficiencies of single-phase and three-phase motors. |
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PREVENTIVE MAINTENANCE
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5 |
0 |
1 |
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Preventive maintenance |
Plan a preventive maintenance program for AC motors. |
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Apply a preventive maintenance schedule to AC motors. |
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TROUBLESHOOTING/FAILURE ANALYSIS |
5 |
0 |
2 |
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Troubleshooting techniques |
Apply troubleshooting techniques. |
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Analyze performance of AC motors. |
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Determine component failure of AC motors. |
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Thermographic surveys |
Discuss thermographic use. |
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NEC REQUIREMENTS |
10 |
0 |
1 |
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Compliance |
Comply with Code requirements on power supplies, grounding, wiring, and interrupting capabilities. |
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Suggested Resources |
Adams, J., &
Rockmaker, G. (1985). Industrial
electricity: Principles and practices (3rd ed.). New York: McGraw-Hill.
American Productivity
& Inventory Control Society. (1987). Maintenance
and repair operations reprints. Falls Church, VA: Author.
Baitch, T. (1984). Electrical technology. New York: John
Wiley & Sons.
Bloch, H. P., &
Geirner, F. K. (1985). Machinery
component maintenance and repair. Houston, TX: Gulf Publishing.
Center for
Occupational Research & Development Staff. (1985). Preventive maintenance for systems and components. Waco, TX:
Author.
Court, M. (1988). Lab manual for first course in electrical
technology. New York: John Wiley & Sons.
Hughes, E. (1987). Electrical technology (6th ed.). New
York: John Wiley & Sons.
International Atomic
Energy Agency. (1987). Manual on
maintenance of systems and components important to safety. Vienna: Author.
Office of Personnel
Management. (1988). Industrial equipment
mechanic. Syosset, NY: Natl Learning.
Seidler, M. P. (1986).
Sustaining systems: A preventive
maintenance program. Fox Lake, IL: Sustaining Systems.
Schram, P. J., &
Murray, R. H. (1987). The national
electrical code (4th ed.). Quincy, MA: National Fire Protection
Association.