By Stella Odueme
The Transmission Company of Nigeria (TCN) has restored the Ajah–Lekki 330kV transmission line to service following the resolution of a technical fault at the Lekki Transmission Substation.
The line was restored at 3:18 p.m. on Wednesday, after TCN engineers resolved a pole discordance issue that prevented the closure of a gas-insulated switchgear (GIS) circuit breaker at the substation.
TCN said the Ajah 330/132/33kV Transmission Substation lost supply from the Egbin–Ajah 330kV Transmission Lines 1 and 2 at about 12:40 p.m. on October 19 due to a system disturbance.
Following the restoration of supply, the Ajah–Lekki transmission line tripped again at 5:02 p.m. because of a three-phase-to-ground fault detected by the Zone 1 protection system.
The line was subsequently patrolled and restored at 6:50 p.m. on October 20. However, the GIS circuit breaker at the Lekki Transmission Substation could not be closed due to pole discordance.
According to TCN management in a statement issued on Wednesday, its engineers resolved the problem and successfully closed the breaker, enabling the transmission line to return to service.
The company appreciated the patience of customers of Eko Electricity Distribution Company (EKEDC) affected by the outage and apologised for the inconvenience caused.