TCN Executes Live-Line Maintenance on Zaria–Funtua Transmission Line Without Power Disruption
Oru Leonard
The Transmission Company of Nigeria (TCN) has successfully completed live-line maintenance on the Zaria–Funtua 132kV transmission line without interrupting bulk electricity transmission, reinforcing efforts to improve the reliability of the national grid.
According to a statement by TCN’s General Manager, Public Affairs, Ndidi Mbah, the maintenance exercise was carried out by the company’s Kaduna Region Live-Line Crew between July 4 and July 7, 2026.
The operation involved replacing damaged glass disc insulators on selected transmission towers with a combination of polymer and glass disc insulators to strengthen the integrity and reliability of the transmission line.
The affected towers included T14, T17, T40, T63, T78, T175, T177 and T178, each of which had at least five damaged glass disc insulators requiring replacement.
TCN said the maintenance was executed under energized, or live-line, conditions, eliminating the need for a planned power outage and ensuring uninterrupted bulk electricity transmission throughout the exercise.
The company noted that the successful completion of the project demonstrates its commitment to maintaining a safe, reliable and efficient transmission network through the deployment of modern live-line maintenance techniques.
TCN added that the adoption of advanced maintenance methods will continue to enhance grid stability while minimizing disruptions to electricity supply across the country.
