I'm up On Nov 28, 2012, at 8:30 PM, William Korthof wrote: > You could use a 120:120volt, with both the first and second inverters using > the same phase, but the xfmr secondary used to supply 120 volts out of phase > from the primary for the slave. Voila, auto-transformer 120:240 split phase > power. Downsides are the heavy loading all on one phase and neutral, and xfmr > losses... > > Alternate option is to get an isolation transformer with 208 primary and > 120/240 secondary. Bond the midpoint. > Better phase balance, but xfmr losses. > > /wk > > William Korthof > 714.875.3576 > Sustainable Solutions > #956904 > > ------------------------- > From: Christopher Warfel > > We were asked to replace two failed Trace SW4048 inverters with two > Outback GT3048 inverters. Upon start up the slave inverter would not > connect. We did not realize that the building service is 208, 3 phase. > The bypass is 120/240 which the SW4048s could connect to without a > problem. Outback says their inverters will not connect to this system > because of the phase angle of 120 and their software. > > The phases are always going to be at this rotation, so I don't see a > transformer helping solve the problem, but this is something I am really > unfamiliar with. > > So the input at the inverter panel is two 120 volt phase at 120 degrees. > The output to the EP is 120/240. > > I am asking if anyone has an idea of how to fix this problem? > ------------snip--------------- > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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