The article link discusses the use of dry compressed air as the working gas in a high voltage switch. This switch was originally designed to operate in an insulating gas made with Sulfur Hexafluoride compound HF6 that are nasty to work with and hard on the actual atmosphere we breathe. Air is universally addictive, and rather OK to use as a non conductive gas to quench are ionization and provide heat dissipation in the switch. It turns out that it is effective and works. As voltages were increased, the only test modification needed was the increase in air pressure inside the switch. Nitrogen is 78 % of air, and a good insulator. It is also more insulating as it is compressed. The dielectric value of air is high at 1.0003XXX Permittivity (not ohms) Jim
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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