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Electric Power Metering for Single and Three Phase Systems
Rating: 4.3 out of 5(118 ratings)
541 students

Electric Power Metering for Single and Three Phase Systems

Presents the fundamentals of instrument and metering in utilities and industry
Created byGraham Van Brunt P. Eng., B.Sc.
Last updated 9/2017
English
English [Auto],

What you'll learn

  • The student will understand the physics of electrical power, the instrumentation involved in the measurement of single and three phase power flow.
  • Example: Understanding digital & analog Wattmeters, Kwhr Meters, polyphase connections.

Explore related topics

Course content

1 section • 8 lectures • 4h 7m total length

  • Basic Metering Introduction1:03

    Explore revenue type metering for utilities worldwide, covering single and three-phase systems, voltage ranges from residential up to very high voltage, and Measurement Canada's standards, plus cross-walk meter verification.

  • Power & Energy14:54

    Introduce power and energy in electrical systems, define energy as work, explain average and instantaneous power, and show how kilowatt-hour meters capture energy from voltage and current.

  • AC Power50:38

    Explore ac power fundamentals, contrasting scalars and vectors with phasors, and learn polar and rectangular phasor notation, impedance, and rms concepts for a 60 Hz power system.

  • Instrumentation39:28

    Explore instrumentation for electric power metering, detailing instantaneous power in inductive and capacitive loads, real and reactive power, power factor, and both mechanical and electronic watt-hour meters.

  • Single Phase Metering34:09

    Explore single-phase metering, where the self-contained meter uses two wires, potential and current coils, and eddy currents to measure power and angle through cos phi.

  • Instrument Transformers32:47

    Explore instrument transformers for measuring voltage and current in metering and protective relays. Understand current and potential transformers, turns ratios, burden, polarity, and accuracy errors in single and polyphase metering.

  • Three Phase Metering42:23
  • Cross Wattmeter Verification32:24

    Explore cross wattmeter verification in electric power metering, using wattmeter, ammeter, and voltmeter readings to plot current and voltage phasors and determine power factor angles.

Requirements

  • You should have a basic understanding of single and three phase power systems.
  • You should have the basic understanding of an electrical three phase power system.

Description

This course concentrates on the electricity meter, electric meter, electrical meter, energy meter, or kilowatt-hour meter which is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device.

Electric meter or energy meter measurements, the total power consumed over a time interval are examined.

From the Electric utility perspective, electric meters installed at customers' premises for billing and monitoring purposes are examined. The typical calibrated in billing units are developed, the most common one being the kilowatt-hour (kWh) and how they are read once each billing period.

If desired, some meters may measure demand, the maximum use of power in some interval. "Time of use" metering allows electric rates to be changed during a day, to record usage during peak high-cost periods and off-peak, lower-cost, periods.

Single-phase and three-phase metering measurements are also covered.

Learning Outcomes:

  1. Graduates of this course will be familiar with:

  2. What is Electric Power

  3. AC & DC Power

  4. Voltage Current, & Power Vectors (Phasors)

  5. Capacitive & Inductive Loads

  6. Real Reactive & Apparent Power (Watts, Vars, VA)

  7. The Dynamometer Wattmeter

  8. The Energy Meter

  9. Instrument Transformers (Current & Voltage CT's & PT's)

  10. 3-Wire, Single-Phase Metering

  11. Polyphase Energy Meters

  12. 3-Wire, Single-Phase Metering with CT's & PT's

  13. Metering a 3 Phase 4 Wire Load ("Y" Connected)

  14. Metering a 3 Phase 3 Wire Load (Delta Connected)

  15. Metering Measurement Standards

  16. Blondel’s Theorem

  17. Phase & Line Relationship

Who this course is for:

  • Electrical Power Systems Managers, Engineers, Technologists, Maintenance Workers, Students in Engineering
  • Anyone who wants to learn power & energy measurement of a three phase system.

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