Maricopa Community Colleges  ELA251AE   19952-20086 
Official Course Description: MCCCD Approval: 07/22/08
ELA251AE 19952-20086 LEC 1 Credit(s) 1 Period(s)
Motor Control Devices
Identification and functions of motor control devices in electrical circuits. Installation techniques include testing and operational checks, troubleshooting methods, and replacement procedures.
Prerequisites: Approval by the Phoenix Electrical Joint Apprenticeship and Training Committee.
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MCCCD Official Course Competencies:
 
ELA251AE   19952-20086 Motor Control Devices
1. Select and explain use of specific electrical tools and instrument necessary to complete electrical installations. (I)
2. Interpret commonly used industrial electrical symbols. (II)
3. Compare and contrast the operation of manual contactors and manual motor starters. (III)
4. Select appropriate magnetic solenoids to replace or repair specific defective components. (III)
5. Select the appropriate AC/DC contactor or magnetic motor starters to replace specific defective components. (III)
6. Read and interpret line diagrams representing complex control circuits. (IV)
7. Identify specific segments of a power distribution network and connect these segments to obtain proper voltages and currents. (V)
8. List the advantages and limitations of both electro- mechanical and solid state relays. (VI)
9. Select and describe the installation of both individual control and photoelectric control devices. (VII, VIII)
10. Identify the basic types of reduced voltage starting systems based on starting current, torque, and cost effectiveness. (IX)
11. Identify the methods for braking and speed control of AC and Dc motors. (X)
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MCCCD Official Course Outline:
 
ELA251AE   19952-20086 Motor Control Devices
        1. Equipment Needs
      A. Electrical Tools
        1. Tools Systems
        2. Tools Type/Selection
        3. Use
      B. Electrical Instruments
      C. Safety
    II. Industrial Electrical Symbols
        A. Language of Control
        B. Line Diagrams
          1. Manual Control Circuits
          2. Automatic Control
          3. Magnetic Control
          4. Logic
            a. Line Diagrams
            b. Basic Control Circuits
      III. Operating Procedures
          A. AC Manual Contactors/Motor Starters Starters
            1. Manual Contactors
            2. Wiring Diagrams
          B. Manual Contactors vs. Manual Starters
            1. Selecting manual Starters
            2. Enclosures
            3. Specific Applications
          C. Magnetism/Magnetic Solenoids
            1. Definition of Magnetism
            2. Solenoids
            3. Troubleshooting Magnetic Solenoids
          D. AC/AC Contactors
          E. Magnetic Starters
        IV. Complex Line Diagrams/Control Circuits
            A. Time Delay
            B. Logic
            C. Reversing Circuits
              1. Single-Phase
              2. Three-Phase
              3. DC Motor Types
          V. Electricity
              A. Generation
              B. Distribution
                1. Power Distribution Systems
                2. Transformers
                3. Switchboards
                4. Panelboards
                5. Motor Control Centers
                6. Busways
            VI. Relays
                A. Types
                  1. Electromechanical
                  2. Solid State
                B. Basic Operation
                C. Troubleshooting
              VII. Individual Control Devices
                  A. Applications
                  B. Installation
                    1. Industrial Pushbottons
                    2. Selector Switches
                    3. Joy Stick
                    4. Limit Switches
                    5. Pressure Controls
                    6. Temperature Controls
                    7. Flow Control
                    8. Liquid Level Control
                VIII. Photoelectric Control Devices
                    A. Applications
                      1. Environmental Influences
                      2. Solid State Sensors
                      3. Hall Effect Sensors
                    B. Installation
                      1. solid State Sensors
                      2. Troubleshooting
                      3. Interfacing Relay/Hall Effect Sensors
                  IX. AC Reduced Voltage Starters
                      A. Definition
                        1. Primary Resistor
                        2. Auto Transformer
                        3. Part Winding
                        4. Wye-Delta
                        5. Solid State
                      B. Basic Reduced Voltage Starting Types
                    X. Accelerating/Decelerating Methods
                        A. Braking
                        B. Speed Control
                        C. NEMA Design
                        D. Multispeed Motors
                        E. Speed Control of DC Motors
                        F. Speed Control of AC Motors
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