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    1. News

    Little modules make big difference in truck production

    March 4, 2004
    Power-distribution units from E-T-A Circuit Breakers cut nearly three weeks off the production of large mining trucks.
    Sherri Carmody
    The T 282 mining truck from Liebherr Mining Equipment stands almost 25-ft tall, is 47.5-ft long, and almost 30-ft wide, with a capacity of 400 tons. An ac electric drive powers the two-axle truck.
     
    Power-distribution units from E-T-A plug in behind the driver's seat and hold 28 thermal-type circuit breakers.
     
    Units use E-T-A's 482-Series thermal circuit breakers rated for 10-g shock vibration from 10 to 2,000 Hz.

    Power-distribution units from E-T-A Circuit Breakers, Mount Prospect, Ill. (www.etacbe.com), cut nearly three weeks off the production of large mining trucks. The PDUs go inside T 282, two-axle, electric-drive haul trucks made by Liebherr Mining Equipment, Newport News, Va. (www.liebherr.com).The original design mounted 20 thermal circuit breakers in a bulky dashboard unit, a process that took about three weeks to complete.

    In contrast, the PDUs install in one day with a multisocketed connector that mates with a connector in the truck wiring behind the driver seat. Added space afforded by the design let eight more circuit breakers be installed for a total of 28. The breakers protect truck electrical systems including computer instrumentation, lighting systems, and cabin components, even a CD player.

    -- Miles Budimir

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