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DC circuit breaker DC circuit breaker DC circuit breaker Contactor Contactor Contactor Contactor High voltage integrated system High voltage integrated system High voltage integrated system Trolley lines Diesel engine Inverter cabinet Rectifier Inverters (x2)

Sécheron develops and manufactures electrical equipment to meet the needs of the mining industry. Specifically, we provide a broad range of products and solutions for high-voltage circuits to ensure the safe, reliable, and efficient operation of diesel-electric mining haul trucks with trolley assist. Our products and solutions ensure:

  • Electrical safety: DC circuit breakers protect the high-voltage DC circuit from overloads and short circuits. In the event of a fault the DC circuit breaker safely disconnects the mining haul truck’s high voltage circuit from the catenary. Unlike a fuse, the DC circuit breaker is simply reclosed once the fault has been cleared.
  • Flexibility: All breakers are available with either an electrical or magnetic holding mechanism; the magnetic mechanism remains closed without a control current. An optional indirect release is also available.
  • Reliability: The direct overcurrent release can be adjusted to higher thresholds than the accepted short-time overload current during start-up and load changes to avoid nuisance tripping during operation. In the event of a severe system fault, the direct-overcurrent release rapidly opens the main contacts to interrupt the short circuit current even at maximum supply voltage.
  • Efficiency: Drive control with contactors to connect the AC machine drive either to the diesel generator or to the catenary for a more efficient full electric drive.

Main benefits

  • Expert knowledge of electrical safety solutions
  • A wide range of products and solutions
  • Off-the-shelf products and custom solutions
  • System design and integration capabilities
  • Extensive testing for high uptime
  • Customer support throughout the product lifecycle
  • Proven designs accepted worldwide


  • Supply program industry