25 Units of S11-1250kVA/11kV Transformers for a Deep-Level Gold Mine in South Africa

Project Overview

HBTP supplied 25 units of S11-1250/11 transformers for a deep-level underground gold mine reaching 3,500m depth in the Witwatersrand Basin, South Africa. The project represents a significant deployment in the gold mining sector, requiring transformers engineered for reliable operation under demanding conditions.

Project Background

South Africa's Witwatersrand Basin has produced over 40% of all gold ever mined. This deep-level mine operates at depths exceeding 3,500 meters, where temperatures reach 40°C and humidity is high. Underground electrical equipment must meet strict mining safety standards.

Customer Requirements

Our Solution

HBTP supplied its S11-series transformers, engineered specifically for gold mining applications. The high-quality CRGO silicon steel core with step-lap mitered joints minimizes no-load losses, while copper windings provide enhanced short-circuit withstand capability and long service life.

Quality & Testing

Underground units passed flameproof certification and internal pressure tests. All units underwent humidity cycling tests for underground conditions. Electrical tests complied with SANS standards for mining equipment.

Delivery & Installation

Surface transformers were delivered to the mine's headgear, while underground units were lowered down the shaft in sections for assembly underground. HBTP provided technical support for underground installation and commissioning.

Project Outcomes

All 25 transformers were successfully energized and are operating at rated capacity. The project was completed on schedule, and the customer has reported excellent performance with no unplanned outages attributed to transformer equipment. HBTP's reliable power distribution solution has contributed to the project's overall success and operational efficiency.