Maricopa Community Colleges  TDR124   19886-20086 
Official Course Description: MCCCD Approval: 07/22/08
TDR124 19886-20086 LEC 5 Credit(s) 5 Period(s)
AC Test/Metering/Electrical Devices
Knowledge and skills related to the use of test equipment and metering devices in the utility field, alternating current (AC) generators, AC motors and transformers.
Prerequisites: TDR123.
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MCCCD Official Course Competencies:
 
TDR124   19886-20086 AC Test/Metering/Electrical Devices
1. Explain the need for test equipment and describe the effects of current on a magnetic field. (I)
2. Using a model of a meter identify and describe the types of meter movements. (I)
3. Describe the meter movements and the functions fo zero- adjust, and damping. (I)
4. Explain the difference between direct current DC and AC meters, and describe the use of each meter. (I)
5. Demonstrate reading a shunted ammeter and explain its function. Solve math problems pertaining to the use of shunted meters. (II)
6. Describe how a current meter can measure voltage and demonstrate the proper procedures for connnecting and reading a volt meter on an AC circuit. (II)
7. Given formulas and variables, solve problems using multirange series ohmmeter and describe their use in AC circuits. (II)
8. Demonstrate the use of power meters and formulas for calculating power(including the use of the basic wattmeter). (II)
9. Describe the basic multimeter, multimeter scales, and the use of multimeters in AC circuits. (II)
10. Draw simplified diagrams of an AC generator and describe the compoenents, their functions in relationship to each other, and how they are assembled. (III)
11. Describe the types of AC generators, the differences or similarities between them, and be able to point out the similarities or difference on a simplified line drawing. (III)
12. Name the equipment used in control and metering of AC generators. (III)
13. Describe the difference between an induction motor and synchronous motor, the function of the motor components of each, and their principles of operation. (IV)
14. Describe the importance of the selection of the proper AC motor for the application service and location. (IV)
15. Describe the basic transformer, transformer types, and the use of transformers in AC circuits. (V)
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MCCCD Official Course Outline:
 
TDR124   19886-20086 AC Test/Metering/Electrical Devices
    I. AC Test Equipment and Meter Movement
        A. Introduction to the Need for Test Equipment
        B. Types of Meters
        C. Meter Contruction
        D. Meter Characteristics and Uses
        E. AC vs. Direct Current (DC) Meters
      II. Metering of AC Circuits
          A. Ammeter and Voltmeters
          B. Ohmmeters
          C. Power Meters
            1. Wattmeters
            2. Checking Wattmeter Power Loss
          D. Multimeters
        III. AC Generators
            A. Salient-Pole Type Alternators and Synchronous Motors
            B. Principles of Operation
            C. Components of AC Generators
              1. Rotor
              2. Stators
              3. Excitors
              4. Static Excitors
              5. Frame and Shaft
            D. Types of AC Generators
              1. Single-Phase
              2. Single-Phase Revolving Field Alternators
              3. Two-Phase Revolving Field Alternators
              4. Three-Phase Revolving Field Alternators
            E. Control and Metering
          IV. AC Motors
              A. Principles of Operation
              B. Types of Induction Motors
                1. Shaded-Pole Starting
                2. Split-Phase
                3. Capacitator Start
                4. Capacitator Start-and-Run
                5. Reversing Direction of Rotation
                6. Repulsion and Induction
                7. Brush-Shifting Repulsion
                8. Polyphase Squirrel-Case
                9. Wound-Rotor
              C. Synchronous Motors
              D. Selection of AC Motors
            V. Transformers
                A. Principles of Operation
                B. Types of Transformers
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