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Construction Operation & Maintenance

Overhead Transmission Line

Over the years, TEPCO has coped successfully with the various challenging issues facing overhead transmission lines. The issues include how to build mechanically robust transmission facilities which withstand harsh inclement conditions, such as severe thunderstorms, typhoons, heavy icy rain and snow, and salty rains, etc. We also succeeded in minimizing the effects of corona discharge emitted from wires as well as of thunderbolts, while we need to ensure that we find the exact location of a flashover once a tower is hit by a lightning. We are sometimes required to put transmission towers in a very limited space or reconstruct in urban congested areas, or put towers in a mountainous area, both of which we finished successfully by redesigning the towers so as to fit the environment.

Therefore, if you face similar issues, TEPCO's consulting services are exactly what you need. We would help you find the best solution for design, construction, maintenance, diagnosis with aging, voltage upgrading, fault locating, accurate distance measurement to ambient structures and other miscellaneous issues.

Overheating of Overhead Transmission Wire Splice/Joint
The Cause of overheating
  • Bad construction (position mistake of steel sleeve etc.)
  • Degradation of contact



The Check of compression joints
  • I. Detector of the position of steel sleeve
  • II. Thermal video system
  • III. Thermometer for active line
  • IV. IC tag for temperature measurement


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