Bespoke transformer solutions for heavy-duty industrial and mining applications

Hexagon Electrical – specialists in high-performance electrical equipment, continues to meet the demanding needs of the mining and industrial sectors in Africa, through the design, manufacture and repair of custom transformers that comply with rigorous technical standards.

The company’s range of oil-cooled and dry-type transformers, as well as mini-substations, are engineered to exact customer specifications, using high-quality copper windings for enhanced efficiency and durability. With winding capacities extending from 10 kVA to 20 MVA and voltages up to 33 kV, the company serves a broad range of mission-critical applications that require operational resilience and precise engineering.

Hexagon Electrical’s range includes surface and pole mount distribution transformers, miniature substations for industrial and mining applications and mobile miniature substations for underground applications. System and machine specific transformers are designed to customer specifications and specialised zone area classified transformers are suitable for safe use in hazardous areas.

The Brakpan-based company operates a fully equipped facility with heavy-lift overhead cranes, efficiently handling large-scale transformers. Advanced testing infrastructure meets regulatory testing requirements up to 50% of full-load current for 20 MVA units.

The highly skilled inhouse team designs each transformer in line with Minimum Energy Performance Standards (MEPS), a key benchmark in improving operational efficiency. MEPS compliance supports lower total cost of ownership, by reducing energy losses and aligning with sustainability goals increasingly mandated by end-users and regulators across Africa.

According to David Dyce, CEO of Hexagon Electrical, “Energy efficiency is no longer an option. It is a fundamental part of how we design for optimum performance and long-term value. Our transformers are built to not only operate efficiently in harsh and remote conditions, but to deliver energy savings and reduce maintenance over their service life.

“Our bespoke solutions, which focus on engineering integrity and design adaptability, are backed by the team’s extensive experience in power systems design and a commitment to meeting stringent technical standards that shape energy-intensive industries.”

The company offers onsite servicing and diagnostics through mobile field teams. Services include oil purification, condition assessments and repair work, ensuring customers can extend the operating life of their equipment without unnecessary downtime or costly offsite transport. These services are particularly valued by clients in deep-level mining and remote industrial zones, where logistics and safety considerations demand on-location reliability.

Apart from transformers, Hexagon Electrical manufactures and refurbishes a full range of certified electrical machines, including flameproof and non-flameproof motors, enclosures, switchgear and ventilation systems. The company’s long-standing involvement in Africa’s core industries is underpinned by a philosophy of mechanical precision and electrical reliability.