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Electrical Power Distribution Systems - Operations and Skills

Electric Power Measurements

Course #: 4019A-B
Duration: 20 hours
Course Prerequisites: Analog Circuit Measurement (Block A23); Introduction to Algebra, Geometry, and Trigonometry (Block X02);
What Students Learn: PART 1 (4019A). Components of Watthour Meters; Current, Voltage, and Power in AC Circuits; Types of Circuits and Their Measurements; Adjustments and Compensation of Meters; Use of Current and Potential Transformers; Register Constants and Multipliers; Meter Mountings and Service Connection Diagrams.
PART 2 (4019B). Watthour Meter Testing and Adjustments; Types of Testing; Testing Methods; Demand Metering; Mechanical Demand Registers; Pulse Devices; Thermal Watt Demand Meters; Measurement of Reactive Power and Apparent Power; Nonsinusoidal Waveforms; Control of Resistance Loads by SCRS; Waveform Analysis, Effect of Nonsinusoidal Waveforms on Measurements.


Course #: 4048
Duration: 10 hours
Course Prerequisites: Transformers (4040); Analog Circuit Measurement (Block A23);
What Students Learn: Definition and Classification of Telemetering; Analog Telemetering Systems; Frequency Telemetering System; Impulse Duration Telemetering System; Digital Telemetering System; Transmission of Data Signals; Telemetering Channels; Computations in Telemetering; Telemetering for Automatic Control; Electric-Power-System Control.

Local Distribution of Electrical Power

Course #: 006038
Duration: 10 hours
Course Prerequisites: Transformers (4040); AC Principles (Block A22); Basic Industrial Math (Block X21);
What Students Learn: The distribution of electrical power is comprised of a total system, starting with the production of electricity and ending with the consumption of electricity. This process includes the planned generation of power based on demand, the long distance transmission system, the local distribution system, and the customer's electrical wiring system. Each of these components includes equipment, material, and many devices that function as individual elements in the successful distribution of usable electrical energy.

In this study unit, students take a tour of the distribution of electrical energy, starting with the various methods of generation, through transmission systems, into the rural and urban substations, and ending at the customer's service entrance.

When students complete this study unit, you will be able to:

  • Identify the three classes of power demands and the trends associated with them.
  • Identify the various methods used in the production of electricity.
  • List the generation, transmission, subtransmission, distribution, and secondary voltage levels.
  • Describe the conductors used in primary distribution systems.
  • Identify the components used in the protection of primary distribution systems.
  • List the clearance requirements associated with secondary distribution.
  • Recognize methods of metering consumer usage of electricity.
  • List the NEC minimum requirements associated with installing services.

    Special Notes: This updated course replaces, Local Distribution of Electrical Power, course 6686.

  • Underground Power Systems

    Course #: 006039
    Duration: 10 hours
    Course Prerequisites: AC Principles (Block A22); Basic Industrial Math (Block X21);
    What Students Learn: Students learned in a previous study unit that the delivery of power includes several systems of components, including the generating plant, transmission system, subtransmission system, and the distribution system. The most visible method of delivering electricity is overhead transmission and distribution. However, an alternative method of getting electricity from the power plant to the customer is underground, both in the transmission and distribution systems.

    This study unit examines methods and equipment associated with the underground primary transmission and distribution, and the secondary distribution, of electricity to the customer.

    When students complete this study unit, you will be able to:

  • List some advantages and disadvantages of underground electrical installations.
  • Identify, cables, ducts, enclosures, and equipment used in underground primary systems.
  • Describe some of the requirements and methods used in the installation of underground secondary electrical service.
  • Describe some of the methods used in the secondary distribution of power in high rise buildings.

    Special Notes: This updated course replaces, Underground Power Systems, course 5959A-B.

  • Switchgear

    Course #: 6613
    Duration: 10 hours
    Course Prerequisites: AC Principles (Block A22);
    What Students Learn: Switchgear and the Power System; Flow of Power; Protection of the Power System; Overlapping Protective Zones; Differential Protection Schemes; Automatic and Manual Control of Generating Stations; Minimum Protection for Generators and Transformers; Protection of Distribution Systems; Circuit Breaker Ratings and Designs; Operation of Circuit Breakers; Interruption of AC and DC Circuits; AC Reclosing Service; Station-Type Cubicle Switchgear; Metal-Clad Switchgear; Low-Voltage Metal-Enclosed Switchgear; Supervisory and Control Switchboards; Switchgear Devices.

    Electric Power Substations

    Course #: 6590A-B
    Duration: 20 hours
    Course Prerequisites: AC Principles (Block A22); Basic Industrial Math (Block X21);
    What Students Learn: PART 1 (6590A). Types, Purpose, Location, and Rating of Transmission and Subtransmission Substations; Protection of Substations; Switching Systems; Switchgear Ratings; Types of Circuit Breakers; Disconnecting Switches; Transformation in Substations; Voltage Control in Substations; Control and Operation of Substations; Construction of Substations.
    PART 2 (6590B). Distribution Systems and Arrangement of Primary and Secondary Feeders; Subtransmission-Supply Arrangement; High-Voltage and Low-Voltage Structures; Transformers; Voltage-Control Equipment; Metering Devices, Control Instruments, and Protective Relays; Rural Substations; Industrial Substations; Direct-Current Substations; Types of Rectifiers Used in Substations.

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