17 mini substations for Zambian mine
Seventeen custom mini substations designed for transport and cooling constraints will supply critical underground mining power.
Image credit: Trafo Power Solutions
Trafo Power Solutions has secured an order to supply seventeen specially designed mini substations for an underground copper mine in Zambia, reinforcing its reputation for customised electrical solutions in challenging environments.
The units include 800 kVA and 1,000 kVA transformers and are engineered to meet tight space restrictions and operational demands, allowing them to be transported underground using the mine’s shaft cage. Each substation contains medium and low voltage switchgear along with the transformer, distributing power to mining equipment and essential infrastructure.
David Claassen, Managing Director of Trafo Power Solutions, explains: “The first priority was the size of the shaft cage. We carefully designed the units for easy transport and deployment while ensuring they would operate reliably underground.”
A key design consideration was ensuring adequate cooling despite the compact dimensions. By optimising airflow and accounting for transformer energy losses, the dry-type transformers maintain safe and efficient operation. Their oil-free design also enhances safety in confined underground conditions, reducing fire risks.
The mini substations can be relocated as mining progresses, easily loaded onto rail cars and moved to new locations. Manufactured in South Africa under a tight schedule, the units passed factory acceptance tests before shipment. Local support in Zambia will provide ongoing service and maintenance, ensuring reliability throughout the project’s lifespan.
“These dry-type transformers offer a robust, safe solution for demanding mining applications,” Claassen adds.
Source: Trafo Power Solutions
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