Written by Sarah NEGEDU

NEMSA condemns influx of substandard transformers

Management of the Nigerian Electricity Management Services Agency, NEMSA, has decried the influx of substandard transformers into the country, stating that the trend has worsened the power crises in Nigeria.

According to the agency the importation of fake transformers by dealers has is creating additional challenges in the already troubled power sector.

The Managing Director and Chief Electrical Inspector of the Federation, Peter Ewesor, said it had become vital to inform all stakeholders in the sector that the permissible transformers ’ Vector Group specifications were outlined in the extant Nigerian Electricity Supply and Installation Standards.

Speaking at a briefing in Abuja, Ewesor said, “In recent times, we have discovered a lot of unwholesome activities that are going on and so I am going to start by the recent enforcement notice we have issued on certain issues. First is on the type and quality of transformers that are by law permitted to be used in Nigeria which is fully embedded in the NESIS.

“These regulations made it mandatory and clear that for distribution transformers, these are transformers that are used in the distribution sub -sector, from 50 KVA - 2, 500 KVA; they must have a Vector Group, which is called DYN 11. It has got a reason; it has got a purpose.”

He added that, “For power transformers in the distribution subsector too, from 2,500 KVA – 3,000 KVA, the power transformers must be Dyn 1. Before these regulations were made, a lot of analyses had been carried out because there is what we call a sequence of phasing between generation, transmission and distribution.

“But we found out recently that there are a lot of transformers that have come into the country which actually are not meeting that requirement and standard. Basically those transformers cause a lot of hazard in the industry.”

He explained, “Some of these transformers generate what we call harmonics that can heat-up electrical materials and equipment in houses; some of them have internal fault and internal problem which generate heat within the transformers that can make such transformer to explode (which can cause hazard).

“Also, some of them are actually special purpose transformers; they are designed to be used in a special way in some installations. But we found out these have been coming into the country and they are creating a lot of challenges.”

The NEMSA boss also banned the direct connection of electricity consumers to 33 kilovolts in the distribution networks, stating dangers of electrical accidents, especially electrocution. 

He said the 33kV points load locations were potential fault points that could cause tripping of power lines and equipment which led to frequent disruption of smooth power flow to consumers.

“Most often, it also results in dangerous combination of low tension lines from the 33kV point load transformers and those of the 11/0.415kV transformers which constitute serious risk to lives and properties.”

He said with the regime of Meter Asset Providers, more meters would be installed for electricity consumers, but that uncertified meters might not be completely functional and must be avoided.

Ewesor further said, “The general public is therefore called upon to note that any electricity/energy meter that does not carry the above described features: NEMSA Plastic Seal and NEMSA Test Label, shows that the meter has not been tested and certified for use in Nigeria according to the Nigerian Metering Code Version 02.”



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