From owner-freebsd-stable Mon Mar 13 18:11:12 2000 Delivered-To: freebsd-stable@freebsd.org Received: from mail.enteract.com (mail.enteract.com [207.229.143.33]) by hub.freebsd.org (Postfix) with ESMTP id B04EC37B6CB for ; Mon, 13 Mar 2000 18:11:02 -0800 (PST) (envelope-from jim@nasby.net) Received: from nasby.net (sysnasby@2.nasby.dsl.enteract.com [216.80.51.18]) by mail.enteract.com (8.9.3/8.9.3) with ESMTP id UAA11164; Mon, 13 Mar 2000 20:10:40 -0600 (CST) (envelope-from jim@nasby.net) Message-ID: <38CD9FA1.FCF32B57@nasby.net> Date: Mon, 13 Mar 2000 20:10:41 -0600 From: "Jim C. Nasby" Organization: distributed.net X-Mailer: Mozilla 4.7 [en] (WinNT; U) X-Accept-Language: en-US,en MIME-Version: 1.0 To: Peter Jeremy Cc: Kris Kirby , blk@skynet.be, freebsd-stable@FreeBSD.ORG Subject: Re: Weirdest crash I ever saw... References: <00Mar14.115543est.115313@border.alcanet.com.au> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Peter Jeremy wrote: > > Note that ferro-resonant transformers have an output waveform close to > a square-wave. They also current-limit at close to their rated output > current - which means loads with large inrush currents will cause > serious voltage droop. Finally, the output voltage is quite frequency > sensitive - don't try to use a 50Hz unit at 60Hz or vice versa. > Don't try to use any 60Hz 'machine' (to a EE, a transformer is often considered a 'machine') at 50Hz unless you know what you're doing. You have to derate the device for operation at the lower frequency. Generally speaking, you can go from 50Hz to 60Hz though. -- Jim C. Nasby (aka Decibel!) /^\ jim@nasby.net /___\ Freelance lighting designer and database developer / | \ Member: Triangle Fraternity, Sports Car Club of America /___|___\ Give your computer some brain candy! www.distributed.net Team #1828 Get paid to surf!! http://www.enteract.com/~nasby/alladvantage.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message