Message-ID: <Pine.BSI.3.96.981110090707.24839A-100000@ux1.cyberenet.net> Date: Tue, 10 Nov 1998 10:06:08 -0500 From: mailto:tuandbob@cyberenet.net Subject: Re: DEVEL-L Digest - 8 Nov 1998 to 9 Nov 1998 To: mailto:DEVEL-L@AMERICAN.EDU
On Tue, 10 Nov 1998, Automatic digest processor wrote, in part:?? : Cliff Missen <mailto:cmissen@BLUE.WEEG.UIOWA.EDU> ?? : mailto:DEVEL-L@AMERICAN.EDU <DEVEL-L@AMERICAN.EDU> ?? : 1998?11?6? 14:08 ?? : Low cost power protection?
Hey AFRIK-IT and DEVEL-L'ers!
[Portions deleted]
I've abandoned the ivy covered halls of the University of Iowa and taken up residence at the University of Jos in central Nigeria. We're constructing a WAN and setting up an Intranet (cargo culting in anticipation of a real Internet connection...) and running into serious power protection problems.
So I'm looking for information on home-grown power protection. Is it possible to couple a UPS with a larger battery to handle a larger amount of computers? (We have two classrooms with 30 computers each.) What are other solutions you've found to protect your power, data, and telecomm lines from surges and lighting? How about building-wide power protection? Classroom power protection and conditioning?
[You may have to set up your own electronics load distribution circuit(s). This will also provide some practical experience for your students.]
I should mention that I've got a copy of the PolyPhaser web site (www.polyphaser.com) as well as their very informative book, "The 'Grounds' for Lightning Protection."
[PolyPhaser is my suggestion for phone and power line protection. PolyPhaser gives radio amateurs (hams) some extra help, so they may help a group like yours. Have your UI friend contact someone in the "radio amateur" department and "gently turn" the subject to charitable projects.]
If you have Web sites for me to explore, please send the pertinent pages or the URLs. We do not have Internet access, but I have a grad student in Iowa who can grab the Web site and burn it onto a CD for me. (Called "DHL-Net"...)
[Exeltech ("http://www.exeltech.com" and "mailto:info@exeltech.com") has modular DC to AC inverters, 115vac/230/240 vac at 50, 60 and 300 Hz up to 20 kilowatts. Using a separate inverter, rather than an integrated (limited capacity) UPS, you can build a custom UPS with the load capacity you need, and the battery reserve you need, and import only the items you have to. Using a locally made battery charger and already available batteries will reduce the cost. Local products are more likely to survive local conditions, and are likely to be cheaper. The PTT or phone company might be able to help you with the chargers and battery acquisition and installation.]
[Bob]