MAE-East still no generator

Sun Sep 8 17:30:11 UTC 1996

Trace makes wonderful stuff, but it is designed to be wall mounted,
not rack or cabinet mounted.  

Of course, a completely PV exchange point with no connection to the
grid _at all_ would be pretty cool.  Is there any marketing demand for
an environmentally-friendly NAP?  :)

                                        ---Rob

   Date: Sun, 8 Sep 96 9:43:50 PDT
   From: Rob Liebschutz <rob at rjl.com>
   Cc: nanog at merit.edu
   Sender: owner-nanog at merit.edu

   In the Alternative energy arena, Trace Engineering makes a 4000 and
   5500 watt 48 VDC sine wave inverter that supports stacking of two
   inverters to double the capacity/reliability.  It's probably not
   designed to be rackmountable though.

   For smaller applications, Exeltech makes physically compact solid
   state sine wave inverters ranging from 250 - 6000 watts.

   If your running AC equipment with non-switching type power supplies,
   like CSU/DSU's, monitors or MUXes watch out for any inverter that does
   not generate a true sine wave.  Square waves and modified sine waves
   can fry such equipment.

   And Yes, you do need hefty wiring on DC equipment due to the voltage
   drop created when transmitting high current at low voltage.  I have a
   400 amp hour battery bank in my van with a 1200 watt inverter mounted
   about 10 feet away and I used 2/0 (that's pronounced 2 ought - heaver
   than 0 gauge) wire for a proper connection.  There are formulas for
   calculation of the correct wire gauge.

   Heavy wire that is flexible enough to be routed around corners and
   through racks is made of braided conductors and is commonly available
   from welding suppliers.

   Trace Engineering can be reached at 206-435-8826.
   Exeltech can be reached at 817-595-4969.

   I could provide lists of vendors of such equipment if that is
   appropiate.

   Rob