Gateway Metalworks fabricated and installed a heavy-gauge steel protection cage around a live Eskom mini substation. The structure shields the transformer from theft, tampering and accidental contact, while keeping full access for authorised technicians.

Mini substations sit exposed on pavements and verges across South Africa. They draw constant attention from copper thieves and vandals. Each breach cuts power to entire neighbourhoods and costs municipalities millions in repairs.

This project delivered a custom-welded cage sized to the existing concrete plinth. The enclosure uses a galvanised steel frame with welded mesh infill panels. A lockable service door gives Eskom crews safe entry for maintenance.

THE CHALLENGE

• Protect a live transformer without disrupting power supply during installation.
• Match the footprint of an existing concrete base with zero tolerance for misalignment.
• Resist angle grinder attacks, bolt cutters and prying tools.
• Allow airflow to prevent transformer overheating.
• Provide technicians with quick access for scheduled maintenance.

THE APPROACH

Gateway Metalworks designed a modular cage with these specifications.

• Frame: 50mm square tube, hot-dip galvanised
• Mesh: Heavy gauge welded mesh, anti-cut profile
• Door: Reinforced single leaf with anti-drill lock housing
• Base fixing: Chemical anchor bolts into the existing concrete plinth
• Ventilation: Full mesh walls allow continuous airflow
• Finish: Galvanised coating for 25 plus year corrosion resistance