The Transmission Company of Nigeria (TCN) has blamed faults on feeders operated by the Eko Electricity Distribution Company (EKEDP) for the recent incident at the Lekki Transmission Substation.
In a statement issued by its management on Thursday, TCN said the clarification was necessary following what it described as misinformation circulated by EKEDP regarding the incident.
According to TCN, EKEDP’s Oniru 33kV and Agungi 33kV feeders simultaneously tripped at about 4:34 a.m. on August 26, 2026, due to overcurrent and an earth fault.
The company said the incident triggered the inter-tripping of the primary and secondary breakers of its TR1 60MVA 132/33kV transformer, resulting in a loud bang and smoke.
TCN disputed EKEDP’s earlier claim that its T11 transformer had unexpectedly tripped and was awaiting inspection.
“Contrary to EKEDP’s claim that TCN’s T11 transformer tripped unexpectedly and was awaiting inspection, the actual incident involved the simultaneous tripping of EKEDP’s Oniru 33kV and Agungi 33kV feeders,” TCN said.
The transmission company said its maintenance team responded promptly, rehabilitated the damaged secondary breaker and restored both the primary and secondary breakers later that day.
However, TCN said the fault recurred 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,” the company said.
TCN maintained that its T11 transformer did not experience an outage as claimed by EKEDP.
“No outage occurred on TCN’s T11 transformer as claimed by EKEDP,” it stated, adding that “the incident was strictly related to EKEDP’s Oniru 33kV and Agungi 33kV feeders.”
The company said its technical team remained at the site and was working to restore electricity supply to affected customers as quickly as possible.
EKEDP had earlier said the affected unit was taken out of service following an unexpected system trip, which disrupted electricity supply along the Oniru 33kV feeder line. The distribution company said it had rerouted and backed up power where possible.
EKEDP also apologised to affected customers and assured them that efforts were ongoing to resolve the fault and restore normal electricity supply.
