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 - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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