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Total 9 documents matching your query.

1. [Amps] soft start circuits (score: 1): Author: "David Lisney" <g0fvt@lisney.org.uk>; Date: Thu, 8 Jan 2004 17:04:35 -0000; Hi, I have used soft start in a big 13.8v power supply, it uses much the same VA rating transformer that a medium sized linear would use (about 2500-3000VA). In my example mains (240v) is initially a; /archives//html/Amps/2004-01/msg00092.html (7,689 bytes)
2. RE: [Amps] soft start circuits (score: 1): Author: "PAUL HEWITT" <wd7s@att.net>; Date: Thu, 8 Jan 2004 09:19:30 -0800; The SSR manufacturers recommend MOV's at the line side terminal to avoid DV/DT turn-on. Cheers, Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.net ____________________; /archives//html/Amps/2004-01/msg00093.html (8,628 bytes)
3. Re: [Amps] soft start circuits (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Thu, 08 Jan 2004 10:26:31 -0800; PAUL HEWITT wrote: The SSR manufacturers recommend MOV's at the line side terminal to avoid DV/DT turn-on. And don't forget RF filtering to avoid RF turn-off (I learned this the hard way). -- 73, Vic; /archives//html/Amps/2004-01/msg00094.html (6,802 bytes)
4. Re: [Amps] soft start circuits (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Thu, 8 Jan 2004 23:57:19 +0000; PAUL HEWITT wrote: --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On Behalf Of David Lisney Sent: Thursday, January 08, 2004 9:05 AM one minor bug is that; /archives//html/Amps/2004-01/msg00095.html (9,991 bytes)
5. RE: [Amps] soft start circuits (score: 1): Author: "PAUL HEWITT" <wd7s@att.net>; Date: Thu, 8 Jan 2004 17:09:36 -0800; I normally use these as the HV supply master mains switch in the amplifier and have never had a dv/dt problem. If MOV's make you nervous, spark gaps are also suggested. According to Crydom their prod; /archives//html/Amps/2004-01/msg00096.html (11,242 bytes)
6. Re: [Amps] soft start circuits (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Fri, 9 Jan 2004 09:21:10 +0000; PAUL HEWITT wrote: I normally use these as the HV supply master mains switch in the amplifier and have never had a dv/dt problem. What makes me nervous about SSRs as safety-critical circuit breakers; /archives//html/Amps/2004-01/msg00102.html (9,335 bytes)
7. Re: [Amps] soft start circuits (score: 1): Author: R.Measures <r@somis.org>; Date: Fri, 9 Jan 2004 07:05:09 -0800; ** Good point, Ian. Sometimes mo' high-tech is not mo' bettah. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-01/msg00105.html (7,786 bytes)
8. RE: [Amps] soft start circuits (score: 1): Author: "PAUL HEWITT" <wd7s@att.net>; Date: Fri, 9 Jan 2004 09:03:03 -0800; HI Ian For safety I still use common sense, fuse every thing and use a plug! My experience with mechanical relays here is the exact opposite, I've welded them closed twice!! Not all faults occur on t; /archives//html/Amps/2004-01/msg00108.html (10,716 bytes)
9. Re: [Amps] soft start circuits (score: 1): Author: R.Measures <r@somis.org>; Date: Fri, 9 Jan 2004 09:55:29 -0800; ** The HV filter capacitor in the anode-supply protects against spikes provided that FWB or FWD rectification is employed. ** Good MOVs have straps for leads instead of wires. ______________________; /archives//html/Amps/2004-01/msg00113.html (9,378 bytes)

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