The Transmission Company of Nigeria (TCN) has said that the power outage which occurred in Lokoja during the rains on Friday 23rd February to date was caused by a sharp drop in load by distribution companies, which created extremely high voltage in the grid, causing the lightening arrester in the 150MVA power transformer in the Lokoja Transmission substation to shatter.

In a statement signed by the General Manager (Public Affairs) TCN, said that lightening arresters are one of the items that normally prevent high voltage in the transformer but because the voltage was extremely high it shattered the lightening arrester of the 150MVA power transformer. The chattered lightening arrester punctured the cooling fin of the power transformer causing oil to gush out from the 150MVA power transformer.

TCN’s maintenance engineers quickly mobilized and arrested the oil and made concerted efforts to seal the cooling fin. The engineers were however unable to immediately seal the cooling fin, as the area that needed to be sealed was drenched with oil, making it difficult to seal. The company then proceeded to empty the transformer of oil into drums, clean and allow the affected surface to dry before further attempt was made at sealing the cooling fin. 

Having successfully sealed the transformer on Sunday, 25th February, TCN has proceeded to put transformer oil into the transformer today. This process would be completed today and the transformer energized latest tomorrow, 27th February, 2017 so that normal supply is restored to Lokoja.

Ndidi Mbah

General Manager (Public Affairs)

Transmission Company of Nigeria (TCN)

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