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Article #21562Re: HV Cap Fun!
From: Arnie Frisch
Date: Wed, 31 May 1989 23:20
Date: Wed, 31 May 1989 23:20
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In article <1418@ns.network.com>, logajan@ns.network.com (John Logajan) writes: > In article <7487@bsu-cs.bsu.edu>, dhesi@bsu-cs.bsu.edu (Rahul Dhesi) writes: > > You can discharge some electrolytic > > capatitors, remove the short circuit, and after a few minutes the > > capacitor regains a smaller charge. > > This is not uncommon especially in high-voltage capacitors, including Another problem is that some capacitors can assume a charge after they have been shorted as a result of changing temperature. This is especially true of ceramic capacitors. You discharge it at 20 degrees C and then you just heat it up to - say 50 degrees C - and you find it's charged up to a significant voltage again, maybe enough to give you a nasty jolt. (It happened to me.) Arnold Frisch Tektronix Laboratories
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!zephyr!tektronix!tekcrl!tekgvs!arnief From: arnief@tekgvs.LABS.TEK.COM (Arnie Frisch) Newsgroups: sci.electronics Subject: Re: HV Cap Fun! Summary: Then there's the effect of temperature..... Message-ID: <5248@tekgvs.LABS.TEK.COM> Date: 31 May 89 23:20:12 GMT References: <4924@m2c.M2C.ORG> <3186@kitty.UUCP> <7487@bsu-cs.bsu.edu> <1418@ns.network.com> Organization: Tektronix Inc., Beaverton, Or. Lines: 20