The Transmission Company of Nigeria has attributed the recent power disruption around Lekki to faults recorded on feeders operated by the Eko Electricity Distribution Company.
TCN made this known in a statement issued by its management on Thursday, saying the clarification was necessary to correct what it described as misleading information regarding the incident at the Lekki Transmission Substation.
According to the transmission company, the Oniru 33kV and Agungi 33kV feeders belonging to EKEDP tripped simultaneously at about 4:34 a.m. on August 26, 2026.
TCN said the feeders tripped following overcurrent and earth-fault indications, which subsequently triggered the inter-tripping of the primary and secondary breakers of its TR1 60MVA, 132/33kV transformer.
The incident, it added, was accompanied by a loud bang and smoke at the substation.
TCN said its maintenance personnel moved in promptly and carried out repairs on the affected equipment, including the rehabilitation of the damaged secondary breaker.
It said both the primary and secondary breakers were restored later the same day.
However, the company explained that the fault reoccurred when EKEDP attempted to close its Oniru feeder on trial.
“Upon EKEDP’s trial closure of its Oniru feeder, the same relay indications caused another trip, necessitating further corrective work,” TCN stated.
The company also rejected EKEDP’s earlier account that its T11 transformer had unexpectedly tripped and was awaiting inspection.
TCN insisted that the transformer itself did not suffer an outage.
“No outage occurred on TCN’s T11 transformer as claimed by EKEDP,” the company said, stressing that the incident was linked specifically to EKEDP’s Oniru and Agungi 33kV feeders.
EKEDP had earlier informed customers that an unexpected system trip had taken the unit out of service, affecting electricity supply along the Oniru 33kV feeder.
The distribution company said it had rerouted and backed up supply where possible while technical teams worked to resolve the problem.
TCN, however, said its own technical team remained at the site and was working with the relevant parties to restore electricity to affected customers as quickly as possible.
The transmission company apologised for the inconvenience caused by the incident and assured customers that efforts were ongoing to normalise supply.
TCN also reiterated its commitment to improving the reliability and resilience of Nigeria’s electricity transmission infrastructure.
“We are committed to working assiduously to put in place a more robust transmission network,” the company said.