Demand on dry-type transformers in South Africa is now well beyond ‘niche’ applications, with local specialist Trafo Power Solutions reporting installation of a range of sizes across various sectors.
“In recent months, we have been involved in projects with small 50 kVA low voltage lighting transformers, right up to 4,5 MVA medium voltage customised units,” says David Claassen, managing director of Trafo Power Solutions. “These have been installed in healthcare facilities, commercial buildings, educational institutions, mines and data centres, as well as at solar energy plants.”
Among its recent contracts, the company has supplied a number of lighting transformers. It has also provided outdoor instrument transformers to facilitate measurement of voltage on overhead lines. These cast-resin voltage transformers (VTs) typically have 33 kV, 22 kV and 11 kV primaries with 110 V secondaries with between 50 VA and 500 VA burden.
“These are substantially lighter than their oil-cooled equivalents, and are, of course, safer due to the absence of oil in their design,” he says.
In the mining sector, a recent contract was the installation of 200 kVA dry-type transformers.
Data centres are a fast growing aspect of the country’s digital economy, and Trafo Power Solutions is supporting this segment with cast-resin transformers. It recently delivered and cold-commissioned two 2 MVA units for a data centre in Cape Town.
At three small-scale solar plants, the company is providing three 800 kVA transformers which will step up power from 400 V to 22 kV.
Source: Engineering News