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The Transmission Company of Nigeria (TCN) has announced the tripping of a 100MVA transformer at its Apo 132/33kV Transmission Substation in Abuja.
TCN said the TR4 transformer tripped in the early hours of Wednesday, September 9, 2026, following preliminary findings of oil spillage on the Red Phase High Voltage (HV) bushing of the transformer.
According to the company in a statement by its Management on Wednesday, four 33kV feeders—H31, H33, H35 and H37—are currently out of supply as a result of the incident.
The company said its maintenance team has commenced a detailed investigation to determine the exact cause of the tripping and facilitate the necessary repairs and restoration of the transformer.
TCN regretted the inconvenience the incident may cause customers of the Abuja Electricity Distribution Company (AEDC) supplied through the affected feeders.
It assured electricity consumers that its engineers were working to restore bulk power supply through the affected transformer as quickly as possible.