Trafo Power Solutions has customised two dry-type transformers for a coal mine in South Africa\u2019s Limpopo province, allowing the units to be fitted into existing enclosures while meeting the customer\u2019s demanding duty requirements.<\/p>\n\n\n\n
\u201cWhile we would normally supply the transformer together with its enclosure, we are also able to design the solution according to the dimensions available on site,\u201d says David Claassen, managing director of Trafo Power Solutions. <\/p>\n\n\n\n
This required one of the transformers \u2013 a specialised 3900kVA unit \u2013 to be copper-wound to achieve a smaller footprint suitable to the space constraints without compromising the technical performance. With 11kV capacity on the primary windings, this transformer included four separate secondary windings \u2013 for 1810V, 1515V, 1360V and 1210V output respectively. <\/p>\n\n\n\n
\u201cBeing located outdoors on a coal mine, the transformer had to be well protected from fine dust and moisture, requiring a specially designed IP54 enclosure,\u201d says Claassen. \u201cAt the same time, the transformer\u2019s large size meant substantial heat loss, which needed to be extracted from the enclosure. The design therefore included an air-to-air heat exchanger to recycle cool air in a closed loop.\u201d<\/p>\n\n\n\n
The second transformer supplied to the mine was a 1600kVA unit for indoor application, stepping down from 11kV to 550V. Working closely with transformer repair experts Koratech Services, who applied certain modifications to the enclosure, Trafo Power Solutions was able to meet the dimensional and electrical requirement of the application \u2013 complete with control and protection system.<\/p>\n\n\n\n
\u201cUnderground mining often presents space constraints which have to be considered in the design of the transformer or the miniature substation,\u201d he says. \u201cWith our expertise and our strategic partnership with leading Italy-based manufacturer TMC Transformers, we can readily cater for these conditions.\u201d<\/p>\n\n\n\n
He notes that Trafo Power Solutions also supplies dry-type transformers to the marine industry, which requires not only that transformers can be safely employed indoors, but that they often be accommodated in cramped spaces. This experience enhances the company\u2019s technical capability in underground mines. <\/p>\n\n\n\n
Claassen highlights that both transformers were ordered during the tight Level 5 Covid-19 lockdown in South Africa. Despite similar restrictions in Italy, TMC Transformers proceeded with manufacturing, running a 24-hour, three shift operation to ensure the required social distancing. <\/p>\n\n\n\n
\u201cThe high level of collaboration with our strategic partner allowed us to design, build and supply the transformers despite the Covid-19 disruption in 2020,\u201d he says. <\/p>\n\n\n\n
Claassen says the dry-type transformer is ideal for both hazardous and non-hazardous areas of coal mines, as the absence of oil as a coolant makes the solution much safer. There is also much less maintenance required on dry-type transformers. <\/p>\n","protected":false},"excerpt":{"rendered":"
Trafo Power Solutions has customised two dry-type transformers for a coal mine in South Africa\u2019s Limpopo province, allowing the units to be fitted into existing enclosures while meeting the customer\u2019s demanding duty requirements. \u201cWhile we would normally supply the transformer together with its enclosure, we are also able to design the solution according to the … Continue reading DRY-TYPE TRANSFORMERS FROM TRAFO IDEAL FOR COAL MINE<\/span>