Series Street Lighting Systems

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Code: SSLA
View for 1 month: $4
Summary

This 58-minute DVD explains how series street lighting systems are designed, operated, and maintained. Using simple schematics, it describe their circuits and components: primary oil switches, relay controls, timing switches, photocells, isolating transformers, incandescent lamps, mercury vapor lamps.

Training Sessions

Circuits and Supply – 5 minutes
Describes a basic series lighting circuit. Uses Ohm‘s Law and animated diagrams to show how a constant current transformer adjusts its output voltage to keep a fixed current flowing into a changing load.

Control Devices – 10 minutes
Shows how a primary oil switch opens and closes the current flow to the primary side of a transformer. Describes photocells and time switches, and demonstrates how they operate. Explains how special relay-type devices are used in street lighting circuits.

Series Systems, Part 1 – 10 minutes
Describes series street lighting systems where lamps and components are connected directly to a constant current transformer secondary. Explains how an incandescent lamp operates, and how a high-voltage head (socket) keeps other lights on when one lamp in the string burns out.

Series Systems, Part 2 – 11 minutes
Describes lighting systems where the lamps are connected through auxiliary isolating transformers. Explains how an isolating transformer works. Shows the parts of a mercury vapor lamp. Using simple schematic diagrams, shows how these components are connected in series lighting systems.

Maintenance and Troubleshooting, Part 1 – 8 minutes
Describes two common maintenance procedures: re-lamping a fixture, and replacing a faulty isolating transformer.

Maintenance and Troubleshooting, Part 2 – 13 minutes
Describes troubleshooting techniques for common problems that can occur in series street lighting systems. Solves two typical field problems by sectionalizing the circuit to locate the problem.

Support Materials Available

Student workbook, instructor guide.