Maricopa Community Colleges  UCS158   20022-20086 
Official Course Description: MCCCD Approval: 07/22/08
UCS158 20022-20086 L+L 4 Credit(s) 6 Period(s)
Meter Testing and Polyphase Metering Systems
Polyphase metering systems and meter testing operations for metering technicians. Emphasis on single and polyphase meter testing, polyphase meters and polyphase metering systems. Covers test switch, IT-rated meters, and Blondel's Theorem.
Prerequisites: None.
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MCCCD Official Course Competencies:
 
UCS158   20022-20086 Meter Testing and Polyphase Metering Systems
1. Describe time load testing and comparison testing. (I)
2. Calculate meter accuracy through the application of formulas to known constants. (II)
3. Calculate kilowatt hour usage through the application of formulas to known constants. (III)
4. Describe resistance and phantom load testing, single phase two and three wire, and transformer-rated watt-hour meter test connections. (IV)
5. Describe common watt-hour meter testing procedures, operation, and possible causes for inaccuracy. (V)
6. Explain the basic design of a polyphase watt-hour meter. (VI)
7. Identify and explain the basic classification types of, meter forms, and adjustment procedures for polyphase watt-hour meters. (VII)
8. State Blondel's Theorem and its application to polyphase watt-hour metering. (VIII)
9. Indicate the connection principles for and use of the most common polyphase metering schemes. (IX)
10. Express the purpose of, use of, and connections for transformer based metering. (X)
11. Describe transformer loss compensation and cite the reasons for its necessity. (XI)
12. Define demand metering and cite the reasons for its necessity. (XII)
13. Cite the generic classes of demand metering. (XIII)
14. Explain totalizer operation. (XIV)
15. Describe the types of and protection concerns for telemetering. (XV)
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MCCCD Official Course Outline:
 
UCS158   20022-20086 Meter Testing and Polyphase Metering Systems
    I. Test Methods
        A. Time Load
        B. Comparison
      II. Meter Accuracy
          A. Time Per Disk Revolution Calculation
          B. Disk Revolution Per Time Calculation
        III. Kilowatt Hour Usage Accuracy
            A. Usage Determination
            B. Percent Registration Accuracy
          IV. Meter Load/Connection Tests
              A. Resistance and Phantom Load Testing
              B. Single Phase Two Wire
              C. Single Phase Three Wire
              D. Transformer Rated Watt-Hour Meter
            V. Testing Procedures
                A. Tests
                  1. As Found Testing
                  2. Creep Test
                  3. Full-Load Testing
                  4. Light-Load Testing
                  5. Power Factor Testing
                  6. As Left Testing
                B. Common Meter Inaccuracies
                  1. Slow Meter
                  2. Fast Meter
                  3. Backward Meter
                  4. Creep
                C. Possible Causes For Inaccuracies
                  1. Slow Meter
                  2. Fast Meter
                  3. Backward Meter
                  4. Creep
              VI. Polyphase Watt-Hour Meter Design
                  A. Concepts
                    1. Electric Energy
                    2. Three Phase Power
                  B. Operation
                  C. Design
                VII. Polyphase Watt-Hour Meters
                    A. Classifications
                    B. Forms
                    C. Adjustments
                      1. Power Factor
                      2. Light Load
                      3. Full Load
                      4. Torque-Balance
                  VIII. Blondel's Theorem
                      A. Definition
                      B. Applications
                    IX. Metering Schemes
                        A. Types
                          1. 2 Stator 3 Wire Self-Contained
                          2. 3 Stator 4 Wire Wye Self-Contained
                          3. 3 Element 4 Wire Wye A-Base
                          4. 3 Stator 4 Wire Delta Self Contained
                          5. 2 Stator 4 Wire Delta
                          6. 2 Stator 4 Wire Wye
                          7. Safety Socket
                        B. Connections
                        C. Use
                      X. Transformer Related Metering
                          A. Purpose
                          B. Use
                          C. Connections
                        XI. Transformer Loss Compensation
                            A. Description
                            B. System Necessity
                          XII. Demand Metering
                              A. Concept
                              B. System Necessity
                            XIII. Generic Demand Metering Classes
                                A. Class 1
                                  1. Curve Drawing
                                  2. Pen Recording
                                B. Class 2
                                C. Class 3
                              XIV. Totalizer
                                  A. Definition
                                  B. Methods
                                    1. Mechanical
                                    2. Photoelectric
                                XV. Telemetering
                                    A. Typology
                                    B. Protection Concerns
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