Electrical Power & Protection

Trafo dry-type transformers for DRC mine

July 2018 Electrical Power & Protection

Alphamin Resources’ remote Bisie tin mine is being supplied with fit-for-purpose dry-type transformers by Johannesburg-based Trafo Power Solutions, in a fast-track project that will see the complete solution manufactured in just 12 weeks.

Bisie’s location, some 160 km north-east of Goma in the Democratic Republic of Congo’s North Kivu province, places constraints on the transformers’ installation that had to be taken into account during selection and design.

“With a difficult access road to the operation, the substation and transformers have been custom-designed to withstand the many stresses expected during transport,” says Trafo Power Solutions managing director, David Claassen. “To deal with the extreme heat and humidity of over 90%, we have also designed the ventilation and airflow inhouse.”

The delivery will involve the movement of two 3000 kVA cast resin transformers, housed in six metre high cube containers. The consignment will also include the ventilation systems, lighting and small power equipment. These transformers will be used for stepping up the supply from a diesel powered generator plant from 400 V to 11 kV to feed the mine.

Project scope also includes two 100 kVA Dyn11 dry-type lighting transformers for application outdoors.

“The design of these dry-type transformers makes them suitable for the climatic conditions at the mine,” says Claassen. “They require only a minimal movement of air across the windings to cool them, although forced air options can also be employed where necessary if ambient temperatures rise too high.”

The high efficiency of the cast resin design means that heat losses are lower, along with cooling requirements. This efficiency also reduces the energy consumed by these transformers, and hence will reduce diesel consumption in this application.

“An important advantage in this remote location is that dry-type transformers are almost maintenance-free and could last for 25 years without significant attention,” adds Claasen. “Oil-filled transformers require regular maintenance including oil sample analysis to ensure operational consistency and safety.”

With no oil required as a coolant, the dry-type transformer is simple, safe and installable indoors without the need for its own civils infrastructure, such as bund walls and structures to ensure safety and environmental protection.

“Trafo Power Solutions works with customers to engineer technically appropriate and proven solutions for their applications,” concludes Claassen, “the fact that we could design and manufacture within this project’s tight deadline is further evidence of our ability to meet demanding schedules.”

For more information contact Trafo Power Solutions, +27 (0)11 325 4007, david@trafo.co.za, www.trafo.co.za

Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

Simple acquisition of energy consumption values
November 2020, Phoenix Contact , Electrical Power & Protection
By developing the new components of the EMpro product family, Phoenix Contact has found a solution that satisfies most energy data gathering applications.

Siemens Energy turbines generate low-emission power
November 2020 , Electrical Power & Protection
Siemens Energy helps Total achieve low-emission goals for largest LNG project in Africa.

Maintaining battery backup systems
November 2020, Comtest , Electrical Power & Protection
Standby battery backup systems play a critical role in keeping essential operations functional in the event of a utility outage.

Electrical loggers for energy savings
October 2020, Comtest , Electrical Power & Protection
Fluke energy loggers deliver a complete picture to reduce energy costs and improve the bottom line.

Power supply components and services for marine applications
October 2020 , Electrical Power & Protection
Vert Energy works closely with the marine and offshore sector offering the supply of quality branded components and the support of a comprehensive repair and maintenance service.

Mines reduce fire hazards
August 2020 , Electrical Power & Protection
Underground mines in southern, central, and west Africa have been seeing the safety benefits of dry-type transformers from Johannesburg-based Trafo Power Solutions. According to managing director ...

RS Components stocks Eaton contactors
August 2020, RS Components SA , Electrical Power & Protection
RS Components now stocks Eaton’s complete Moeller series of compact DILMT contactors. Easy to integrate in a variety of industrial machines and systems, the contactors enable space savings of up to 40%, ...

Power supplies for building automation
June 2020, Phoenix Contact , Electrical Power & Protection
The new Step Power power supplies from Phoenix Contact are specifically tailored to the needs of modern building automation. With their comprehensive approval package, which includes the standard ...

Skid-mounted dry-type transformer
June 2020 , Electrical Power & Protection
In a specialised application on a coal mine, Trafo Power Solutions recently supplied a dry-type transformer mounted on a mobile skid. “The harsh environment of a coal mine required us to specially ...

Customised transformers for renewables and beyond
June 2020 , Electrical Power & Protection
A focus on application engineering allows Trafo Power Solutions to supply customised dry-type transformers for a range of sectors including renewable energy. “We begin at the proposal stage by engaging ...