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  • Users: dwil
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  1. dwil

    Altitude Derating

    All, Can anyone explain the logic (physics) behind the need to derate at altitide. To my twisted way of thinking, it is the opposite to what I would have thought. At altitude, air is less dense, and I would have thought that this would have made it a better insulator - apparently it does not...
  2. dwil

    Substation/Switchroom Fire Suppression

    G'Day All, What are the latest trends with the type of fire suppression systems being used in substations and switchrooms containing H.V, M.V. and L.V. switchgear and MCCs? What is being used instead of Halon? Is there an alternative to CO2? Thanks.

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