Date: Sun, 31 May 1998 20:38:47 -0500 (CDT) From: Leon Schumacher <goebel@tranquility.net> To: Christopher Martin at Home <psycho@keyworld.net> Cc: Steve Ames <steve@ns1.cioe.com>, freebsd-isp@FreeBSD.ORG Subject: Re: Backup Power? Message-ID: <Pine.BSF.3.96.980531203556.6440E-100000@tranq1.tranquility.net> In-Reply-To: <199805311752.TAA07646@mail.keyworld.net>
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Steve- The autochange-over switch is called a double pole double throw switch. This is a must or you can literally kill someone who is trying to repair the line (while you are providing power for yourself). Power will feed down the line in reverse, and when it hits the transformer, rather than step down the current, it will step up the current. In some cases this can take 120/240V power that you are producing and transform it to 7000+ volts... Leon Schumacher Tranquility Internet On Sun, 31 May 1998, Christopher Martin at Home wrote: > You need a generator, an automatic changeover switch on mains AND a UPS. > > -- > Christopher Martin > BDM -KeyWORLD http://www.keyworld.net > > ---------- > > From: Steve Ames <steve@ns1.cioe.com> > > To: freebsd-isp@FreeBSD.ORG > > Subject: Backup Power? > > Date: Friday, May 29, 1998 10:38 PM > > > > > > This is more than a little off topic, but here goes. > > > > My company operates a number of remote POPs and we want to upgrade > > our backup power. Our minimum target is 2 hours (would like to > > get closer to 8) and most POPs consist of 4-6 Adtran CSU, a Cisco > > 4000 and a couple of Ascend Max 4048. > > > > I've queried a couple of UPS manufacturers and they're going to quote > > me up something but I'm not sure UPSs are the way to go... anyone > > played with other options such as generators? > > > > -Steve > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > > with "unsubscribe freebsd-isp" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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