Date: Sun, 16 Nov 1997 09:55:56 -0500 (EST) From: Andrew Webster <andrew@guardian.fortress.org> To: Dev Chanchani <dev@wopr.inetu.net> Cc: freebsd-isp@freebsd.org Subject: Re: Power Message-ID: <Pine.BSF.3.96.971116095333.1042B-100000@guardian.fortress.org> In-Reply-To: <Pine.BSF.3.95q.971115130536.14527A-100000@wopr.inetu.net>
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You might want to look into regenerative type UPSes. These don't really care what you feed them because they regenerate the AC at all times. Check out Liebert and Excide for these type of systems. Typically though you will only find this in 3KVA & up models which is what you should be using anyway. On Sat, 15 Nov 1997, Dev Chanchani wrote: > > We had an extended power outage last night. After realizing that our UPS's > would not keep our network up for the black-out, I ran to sears with a > credit card and bought a Craftsman generator. > > My lesson in power began :) > > I was wondering if anyone has been through this and could help me on a > couple of points: > > We have our servers, switches and routers plugged into APS UPS's (600's > and 650's). The UPS's are plugged into surge protectors. The surge > protectors are plugged into 15 AMP 12 guage 100 ft extension coards. We > ran the extension cords (took them out of the wall) and plugged them into > the generator. The 650 UPS could not take it, it was flipping between > generator power and UPS power every second. So... my questions are as > follows: > > 1. Can you plug a UPS -> Surge protector -> generator > 2. Are there any specifics I should look for when planning the power setup > of new servers and racks. > 3. How much output does a genarator need per server (as a rule of thumb)? > 4. Was the UPS switching from internal power to external power because the > generator power was fluctuating, not enough power, etc? > > If anyone has experience with this type of stuff, any help and information > would be greatly appreciated. > > Thanks in advance! > > PS: To anyone who does not have experience in this, you might want to take > a look, because its not fun to learn these things in total darkness in a > ice storm.. ;) > > Andrew Webster andrew@pubnix.net Key fingerprint = CF E8 16 B8 A6 DB E3 C9 83 E7 96 24 25 58 15 6E PubNIX Montreal Connected to the world Branche au monde P.O. Box 147 Cote Saint Luc, Quebec H4V 2Y3 tel 514.990.5911 http://www.pubnix.net fax 514.990.9443home | help
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