Diesel-electric mining haul trucks

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.