Trafo Delivers Custom Mini Substations to Power Zambian Underground Copper Mine

Why It Matters

The deployment provides a safe, space‑efficient power solution that mitigates fire risk and supports rapid mine expansion, setting a new standard for underground electrification in Africa.

Key Takeaways

• Seventeen mini substations customized for Zambian underground copper mine.
• Units sized for shaft cage transport, 800‑kVA and 1,000‑kVA.
• Dry‑type transformers reduce fire risk, no oil leakage.
• South African factory delivered units with in‑country support in Zambia.

Pulse Analysis

Trafo Power Solutions’ delivery of seventeen custom mini substations marks a significant engineering feat for Zambia’s expanding underground copper operations. The compact 800 kVA and 1,000 kVA units were designed around the mine’s restrictive shaft‑cage dimensions, allowing safe loading onto rail cars and rapid relocation as the mining face advances. By integrating medium‑ and low‑voltage switchgear with dry‑type transformers, the substations provide reliable power distribution while meeting the stringent space and weight constraints typical of deep‑level mining environments.

The choice of dry‑type transformers addresses two critical concerns in subterranean settings: fire safety and maintenance simplicity. Unlike oil‑filled alternatives, dry‑type units eliminate the risk of combustible fluid leaks, a key factor for regulators and operators focused on minimizing ignition sources underground. Trafo’s engineering team also optimized airflow within the reduced‑size enclosures to manage transformer losses, ensuring that heat dissipation meets ambient temperature expectations without compromising performance. This thermal management strategy underscores the company’s expertise in adapting proven technology to harsh, confined conditions.

Beyond the hardware, Trafo’s South African manufacturing hub delivered the substations on a tight schedule, completing factory acceptance tests before shipment. The partnership with a local Zambian service provider guarantees on‑site support, spare‑part logistics, and rapid response to any operational issues, reinforcing the project’s long‑term reliability. For the broader mining sector, the project illustrates how modular, custom‑engineered power solutions can accelerate development timelines, reduce capital expenditures, and enhance safety standards, setting a benchmark for future underground electrification initiatives across Africa.