Considering the varying nature of operating conditions from one mine to another, Trafo Power Solutions, a specialist in the design and supply of dry-type transformers, will demonstrate at the upcoming Electra Mining Africa 2022 its flexibility and ability to tailor its solutions to meet specific site and customer needs.
Customised for site conditions, cast resin transformers in a specialised IP55 enclosure installed outdoors in a mining application.
“Through many years of experience in the mining industry, pretty much across all commodities, we have recognised that each mine is different and has its own set of challenges,” says David Claassen, Managing Director of Trafo Power Solutions. “A one-size-fits-all approach is not appropriate, and this is why most of our products are custom-designed and -manufactured to suit specific site conditions.”
Because air is used as the cooling medium in dry-type transformers, they are typically installed in indoor environments. However, Trafo Power Solutions has a wealth of experience in supplying dry-type transformers for outdoor applications as well. The design of the enclosure is critical to withstand the commonly harsh conditions and high dust and moisture levels. Despite the restrictive nature of enclosures, the company’s custom design capability guarantees adequate ventilation, while allowing for the necessary levels of ingress protection to keep dust and moisture at bay.
“With our in-house design capability, we are able to custom engineer solutions particularly for challenging underground applications. We can tailor the dimensions, weight and other factors to match the space constraints presented by vertical shafts or decline shafts which are used to take the transformer underground,” Claassen adds.
In the context of a renewed focus on environmental, social and governance (ESG) principles in the mining industry, Claassen says Electra Mining Africa presents an opportunity for the company to showcase how its solutions – dry-type transformers, modular-type and miniature substations, among others – meet the growing requirement for environmentally friendly solutions.
“There is a common understanding that sustainability represents one of the mining industry’s most significant opportunities for long-term value creation, building trust and sustainable growth,” says Claassen. “By using air as the insulating and cooling medium instead of oil, dry-type transformers allow mines to reduce their reliance on fossil fuels.”
As well as sustainability, mines are continually pushing for progress in safety. Claassen says one of the key drivers for using dry-type transformer technology in the mining sector is the safety imperative.
“Mining companies have shown their strong commitment to evaluating their operating practices on an ongoing basis – to work towards a workplace of Zero Harm. The absence of oil in dry-type transformers translates into reduced safety and environmental risk. It means the equipment does not present any chance of leakages and possible fires.”
Dry-type transformers are categorised as F1 in terms of fire resistance ratings, indicating a low level of risk. Cooling options include natural ventilation and forced ventilation, with the availability of air-to-air heat exchangers and auto heat exchangers. This gives dry-type units the significant advantage of having an inherently low risk in terms of safety and environmental impact.
Electra Mining Africa 2022 will take place from 5 to 9 September at the Johannesburg Expo Centre. Claassen is excited that the trade show has come back to life after previously being cancelled due to Covid-19.
“The mining industry is an important sector for us and we look forward to participating at the show in-person and reconnecting with the various stakeholders, from junior and senior mining personnel to original equipment manufacturers,” Claassen concludes.
For more information visit: https://www.trafo.co.za
