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ASKM1-400/3P MCCB Solution for South African Gold Mine

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Solution Delivered

AISAKI implemented its ASKM1-400/3P Molded Case Circuit Breaker (MCCB) in a deep-level gold mining operation in Johannesburg, South Africa, ensuring robust circuit protection for underground ventilation and pumping systems.


Project Overview

Location: Witwatersrand Basin, South Africa (World’s deepest gold mines)

Application: Power Distribution Protection for Underground Infrastructure


AISAKI’s Scope:

  • Installed 45 units of ASKM1-400/3P MCCBs (400A, 3-pole configuration)

  • Configured with Adjustable Thermal-Magnetic Protection

  • Integrated with mine’s PLC-based monitoring system




Key Technical Specifications

  • Rated Current: 400A

  • Breaking Capacity: 50kA at 400V

  • Protection Features: Overload + Short Circuit Protection

  • Environmental Rating: IP55 (Dust Protected / Water Jet Resistant)

  • Operating Temperature: -20°C to +60°C



Challenges Overcome


  • High Humidity Underground – Corrosion-resistant coating on all metal parts

  • Vibration & Shock – Reinforced mechanical structure for seismic stability

  • Limited Maintenance Access – Long-life contacts (30,000+ operations)



Customer Benefits


1. Improved Safety

  • Instantaneous trip prevented cable fires in confined spaces

  • Visible trip indicators allowed quick fault identification

  • Padlockable handles ensured LOTO compliance


2. Cost Savings

  • 20% lower energy losses vs. previous breakers

  • Tool-free adjustments reduced maintenance time by 35%

  • Standardized footprint simplified retrofits


3. Smart Features

  • Optional communication module for remote monitoring

  • Compatible with IoT platforms for predictive maintenance

  • Ready for future DC applications in battery-powered systems

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 +86-514-83872888
No.5 Chuangye Road, Chenji Town, Yizheng City, Yangzhou City, Jiangsu Province, China.

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