Designed as an introduction to operation and maintenance of overhead electrical distribution systems. Electrical theory application for various distribution line construction and overhead line configurations, energizing and de-energizing techniques, troubleshooting, and grounding of overhead circuits are explored. Single and three phase distribution transformer applications are discussed. Students will be able to identify and demonstrate personal and electrical safety procedures utilized in overhead distribution switching, isolating, testing and diagnostic applications. Overhead service and power quality issues are analyzed in relation to balanced loading and overall customer satisfaction.
Goals, Topics, and Objectives
- Safety Practices
- Overhead Distribution Lines, Construction, Terminations, and Line Tools
- Installation of Overhead Distribution Systems – Source and Load
- Grounding, Shorting, and Bonding Applications
- Overhead Distribution Transformers – Single and Three Phase
- Fusing and Line Protective Devices – Principles and Application
- Testing and Maintenance of Overhead Switchgear
- Overhead Distribution Troubleshooting, Switching, and Isolating
- Protective Procedures for Work on Overhead Distribution Equipment
- Identify the various types of power and neutral conductors used in an overhead electric field installation and their purpose in delivering quality electric service.
- Identify the various types of distribution transformers and their application in providing proper current and voltage in an overhead distribution system.
- Draw an electrical schematic diagram, identifying how connections are made from source to load, including power conductors, single/three phase transformers and switches, and various line protective devices.
- Identify three different types of overhead switching equipment including procedures utilized for isolating and in-line replacement.
- Define the steps of troubleshooting an overhead distribution circuit and methods for identifying fault location and isolating/restoration techniques.
- Identify how a three-phase transformer is protected on source and load sides and disconnecting/isolating techniques.
- Define the application of overhead distribution current transformers, voltage transformers, relay applications and testing methods.
- Identify and describe the inspection, tests, and maintenance of the various types of distribution circuit protection devices and the equipment used to conduct these tests.
- Define sources of electrical and physical hazards at a transformer installation site, and methods of current /voltage protection for working on associated equipment.
- Create an operating sequence for switching to de-energize and isolate a portion of an overhead distribution circuit.
Assessment and Requirements
Labs, quizzes, tests, assignments
To be determined by instructor.