The Transmission Company of Nigeria (TCN) has successfully completed live-line maintenance on the Zaria–Funtua 132kV Transmission Line without disrupting bulk electricity transmission, reinforcing its commitment to ensuring a stable and reliable national grid.
According to TCN, the maintenance exercise was carried out by the company’s Kaduna Region Live-Line Crew between Saturday, July 4 and Tuesday, 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 restore the integrity and reliability of the transmission line’s insulation strings.
The affected towers were 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 maintenance work highlights its growing capacity to deploy modern live-line maintenance techniques, which enable critical repairs to be carried out without interrupting electricity supply.
TCN reaffirmed its commitment to maintaining a safe, reliable and efficient transmission network through proactive maintenance and the adoption of advanced technologies aimed at improving power system reliability across the country.
