This may be getting a bit away from the intent of this thread, but if I'm not mistaken, corona breakdown voltage increases with pressure (except for very low pressures, where the opposite is true). Ref: Paschen's Law: V is a function of p x d, where p is the pressure and d is the gap distance
So, breakdown at higher pressure occurs at a higher voltage. As I recall, the curve of voltage vs. pressure looks a bit like a Nike swoosh logo (no trademark infringement intended). I can't find my copy of the curve (I know it's here somewhere), and I don't recall at what pressure the voltage potential bottoms out, but I seem to recall that its around 40 volts at some small fraction of 1 atmosphere. DB > ---------- > From: plaw...@west.net[SMTP:plaw...@west.net] > Sent: Wednesday, November 25, 1998 8:09 AM > To: emc-p...@majordomo.ieee.org > Subject: Re: Medical Devices in Hyperbaric Chamber > > 1) In a high-pressure atmosphere, convection cooling of power devices > should be > OK. > > 2) Corona/voltage breakdown through the air would happen at a lower > voltage > level. > > These are based on the idea that there's little convection/corona in > vacuum > environments. > > As others have indicated, the gas in the chamber could play an important > part > of the product safety as well. > > -- > Patrick Lawler > plaw...@west.net > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > j...@gwmail.monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
