Introduction to Distribution Systems – 7 minutes
Lists the basic components used in a distribution system. Explains the basic differences between primary and secondary distribution systems
Transformers – 9 minutes
Defines the term transformer, and explains in general terms how a transformer works. Using a simplified diagram, identifies basic elements common to most transformers. Shows how to recognize pole top, pad-mounted, and subsurface transformers.
Voltage Regulators and Capacitors – 12 minutes
Defines voltage regulator. Identifies the electrical and physical elements that make up a typical voltage regulator. Explains in general terms how a voltage regulator works. Defines a capacitor and explains in general terms how a capacitor works. Describes a potential safety hazard inherent in all capacitors.
Distribution Lines and Layouts – 9 minutes
Explains how electrical energy flows from the substation to the consumer. Lists three categories of distribution lines and the range of voltage carried by each line. Shows three types of distribution layouts
Protective Devices, Part 1 – 11 minutes
Explains how circuit breakers operate to protect a distribution feeder from the effects of faults. Describes how circuit breakers and fuses are used in a coordinated protective system to protect feeders and laterals from the effects of faults. Explains how sectionalizing can be accomplished to protect customers from long outages.
Protective Devices, Part 2 – 10 minutes
Describes how reclosers and sectionalizers provide coordinated protection for a distribution system. Describes two devices that protect a distribution system from excessive current flow caused by voltage surges.