Standard |
Introduces the fundamental concepts, principles, and devices involved in industrial motor control. Emphasis is placed on developing a theoretical foundation of industrial motor control devices. Topics include: principles of motor control, control devices, symbols and schematic diagrams, and Article 430 NEC.
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Competency Areas |
Hours
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Principles of Motor Control |
Class |
2 |
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Control Devices |
D. Lab |
0 |
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Symbols and Schematic Diagrams |
P. Lab/O.B.I. |
3 |
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Article 430 NEC |
Credit |
3 |
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Prerequisite/ Corequisite: |
IDS 105 |
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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PRINCIPLES OF MOTOR CONTROL |
5 |
0 |
5 |
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DC motor controls |
State the function of starter devices in a DC motor circuit. |
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Name types of manual DC motor starters. |
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Name types of automatic DC motor starters. |
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Define the term controller as applicable to DC motor circuits. |
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Describe the methods of controlling the speed of DC motors. |
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AC motor controls |
State the purpose of controllers in AC motor circuits. |
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Name the types of AC motor controllers. |
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Identify the components used in AC motor controls. |
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Describe the methods used to provide circuit protection in AC motor control applications. |
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CONTROL DEVICES |
10 |
0 |
5 |
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Sensing devices |
Identify and describe various devices used for sensing temperature, pressure, level, motion, and position. |
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Switching devices |
Identify and describe the devices used in switching circuits. |
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Overload protection |
Identify and describe the devices used for motor overload protection. |
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Ground fault/short circuit protection |
Identify and describe the devices used for ground fault/short circuit protection. |
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Miscellaneous devices |
Identify and describe various other devices used in motor control circuits. |
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SYMBOLS AND SCHEMATIC DIAGRAMS |
5 |
0 |
3 |
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Symbols |
Identify and draw the various symbols for components and conditional state of devices used in motor control circuits. |
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Schematic diagrams |
Describe a typical motor control schematic diagram. |
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Draw schematic diagrams of various motor control circuits. |
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Interpret schematic diagrams of various motor control circuits. |
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ARTICLE 430 NEC |
10 |
0 |
7 |
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Conductor sizing |
Calculate the size for branch circuit conductors covered by NEC section 430-22. |
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Ground fault/short circuit protection |
Calculate the size for feeder circuit protection covered by NEC section 430-22. |
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Calculate the size for ground fault/ short circuit protection (fuses and circuit breakers) using locked motor current, Table 430-152, and Article 430-52 of the NEC. |
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Disconnects |
Size and locate the motor disconnects according to NEC Part H Article 430. |
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Size controllers according to NEMA standards. |
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Equipment grounds |
Size equipment grounds according to Table 250-95 of the NEC. |
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Overload protection |
Calculate the size of overload protection according to sections 430-74 and 430-34 of the NEC. |
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Control conductors |
Calculate the size of control conductors according to Article 430-72 of the NEC. |
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Sizing raceways |
Size raceway for motor circuits using Chapter 9: Table 3A, 3B, 3C, 4, and 5 of the NEC. |
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Suggested Resources |
Suggested Resources include textbooks shown below or most current edition.
Adams, J., & Rockmaker,
G. (1985). Industrial
electricity: Principles and practices (3rd ed.).
Alerich, W. N. (1991). Electricity three: Motors and generators, controls,
transformers (5th ed.).
Herman, S. L., & Alerich,
W. N. (1992). Industrial
motor control (3rd ed.).
Nadon, J. M., et al. (1989). Industrial electricity.
Stallcup, J. G.
(1990). Motors and transformers based
on the 1990 NEC.
Miller, Rex and Mark (1992) Electric Motor Controls