Monday, June 21, 2021

TCN reveals causes of transformers failure


Rayyan Alhassan
Rayyan Alhassan is a graduate of Journalism and Mass Communication at Sikkim Manipal University, Ghana. He is the acting Managing Editor at the Daily Nigerian newspaper, a position he has held for the past 3 years. He can be reached via [email protected], or, or @Rayyan88 on Twitter.
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The Transmission Company of Nigeria, TCN, on Tuesday attributed the failure of five of its transformers at its Abuja, Benin, and Onitsha sub-stations to inadequate protection and investment on the distribution networks.

The Managing Director of TCN, Usman-Gur Mohammed, said this in an interview with News Agency of Nigeria in Abuja on Tuesday.

“Why we are having failures of these transformers is because the distribution companies are not having an investment in their network.

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“Most of these transformers you see here are supplying customers of the Distribution Companies, DisCos directly.

“So there is no protection between our equipment and that of the distribution companies.

“If there is a fault on their side, it hits our transformers directly and that is why we are having these kinds of failure.

“We have lost two transformers in Abuja, we have lost another two in Benin, and we lost one in Onitsha.

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“If we don’t have protection on the side of the Discos, we will continue to lose our transformers.

“Between us and the DisCos, there are supposed to be injection sub-stations where they will also have their protection and our side will also have protection.’’

Mr Mohammed said that out of the 731 interfaces between TCN and the DisCos, only 421 were fully protected, with the remaining interfaces not protected.

“Those areas where we are not fully protected are the areas where TCN is losing its transformers,’’ he added.

He spoke of the need for massive investment on the distribution end to protect TCN’s transformers given the high cost of the transformers.

“To import and install a transformer is close to about two million dollars, so when you lose two million dollars, you know what it means.

“And we don’t want this to continue and that is why we are calling for a policy and regulatory environment that will stop all these.’’

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He, however, said that TCN engineers had been empowered to take over repairs of the failed transformers, adding that the repair of such faulty transformers by the engineers was reducing the cost for the company.

“As I told you previously, it is only in Lagos that we have people who repair these kinds of transformers.

“Since I came in Feb. 2017, I can tell you most of the transformers that have been repaired in Lagos stopped functioning after commissioning.

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“Recently, we took a 60MVA transformer that was repaired in Lagos to Benin, but at commissioning the transformer failed.

“The Karu sub-station transformer that TCN engineers are going to fix will not take more than N5 million, if we are going to transport this transformer to Lagos, which is a 60MVA, it cannot be less than N15 million.

“And that was why we decided to empower TCN engineers to carry out the repairs.

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“Another one failed in Kubwa, which we have not replaced, so when we fix this one we are going to take it to Kubwa so that we replace the failed transformer.’’

He said that TCN had already signed a contract to build an additional two 330KV and three 132 KV sub-stations in Abuja.

“Presently we have two 330KVs, but we are building an additional two, we are building three 132 KVs sub-stations in addition to the five we have in Abuja.

“And so all these new sub-stations that will be built, if the existing ones are not protected the new ones are also not going to be protected.

“That is why there is a need for massive investment in the DisCOs,’’ Mohammed said.

NAN could not, however, reach the Executive Secretary, Research and Advocacy, Association of Nigerian Electricity Distributors, Sunny Oduntan as his mobile line could not be reached at the time of filing this report.


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