Mechanical Design of Overhead Lines
Author: Velimir Lackovic
Electric power can be transferred either by underground cables or overhead lines. The underground cables are not commonly used for power transmission for two main reasons. Power is transferred over long distances to load centers and the installation costs for underground transmission is significant. Secondly, electric power needs to be transferred at high voltages for economic reasons, and it is very difficult to achieve adequate insulation to withstand such higher pressures. As a consequence, power transfer over long distances is accomplished by using overhead lines.
With the increase in power demand and consequent rise in voltage levels, power transmission by overhead lines has assumed considerable importance. However, an overhead line is subjected to various weather conditions and other external interferences. This requires the use of adequate mechanical safety factors to ensure the continuity of line operation. Typically, the strength of the line must be able to withstand the most severe weather conditions likely to occur.
This course focuses on the different aspects of mechanical design of overhead lines. It is suitable for engineers with a desire to understand basic elements of the overhead line, its design principles, calculation methods and factors that affect overall current carrying capacity. Upon successful completion engineers will be able to address important overhead line design considerations and independently complete different calculations.
Once you complete your course review, you need to take a multiple-choice quiz consisting of forty-five (45) questions to earn 8 PDH credits.
Learning Objectives
This course is intended to provide you with the following specific knowledge and skills:
- Main components of overhead lines
- Insulator types
- String efficiency
- Corona effect and factors that affect it
- Sag in overhead lines
- Factors that affect sag in overhead lines
Download the Course to review and begin earning your PDH credits.
We provide technical courses for PDH credits that meet Board requirements for Professional Engineers, Geologists and Land Surveyors. This courses is guaranteed to be accepted in AK, AL, AR, FL, GA, IA, IL, ID, IN, KS, KY, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, SC, SD, TN, TX, UT, VA, VT, WI, WV, and WY. Before purchasing this course, please confirm that your state Board is listed above.
