Date: Mon, 13 Mar 2000 20:10:41 -0600 From: "Jim C. Nasby" <jim@nasby.net> To: Peter Jeremy <peter.jeremy@alcatel.com.au> Cc: Kris Kirby <kris@hiwaay.net>, blk@skynet.be, freebsd-stable@FreeBSD.ORG Subject: Re: Weirdest crash I ever saw... Message-ID: <38CD9FA1.FCF32B57@nasby.net> References: <v04220814b4f307e1b3bf@[195.238.24.123]> <Pine.BSF.4.10.10003131518340.29922-100000@barricuda.bsd.nws.net> <00Mar14.115543est.115313@border.alcanet.com.au>
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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
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