Hi Norm, The first paragraph does not make sense to me. How can you add power to the AC input and charge the batteries from it at the same time? Ahmet
> From: [email protected] > To: [email protected] > Date: Fri, 15 Apr 2011 18:19:49 -0400 > Subject: Re: [Liveaboard] EXT :Re: Power Issue > > > The below is an old message that somehow got sidetracked. Perhaps it may > be useful to someone yet... Norm > > > > > My Trace 12VDC 2.5KW inverter has an input for 120vac and an output for > 120vac. When 120vac appears on the input the inverter instantly connects > the input to the output and disconnects itself. Then it synchronizes > itself to the input (takes about five seconds), then parallels itself to > the input so it adds its power to that of the input's (and also starts > charging the batteries). So everything is automatic and no magic smoke > gets out. > > Otherwise a Ship's Power switch is needed to insure the 120vac goes to > where it should without fireworks or shrinking wallet syndrome. > > A long time ago I was on a boat in Ft Lauderdale that used a range > receptacle for each source of power. The boat was powered by a range > pigtail. He would simply plug the boat into whatever power source he > wished. I did this at first but eventually went to a rotary selector > switch. The switch has: Shore Power, 8KW diesel genset, 20KW shaft > generator and Ground. I put the ground there in case I got nervous during a > thunderstorm but I don't think I've ever used it. The inverter is > downstream from the switch and is always on. > > The 7.5KW (Groban Supply) isolation transformer is connected to any 240vac > source selected (almost always the 8KW genset, occasionally shore power > when I am hauled out for annual maintenance) and powers it down to 120vac > which feeds all boat 120vac loads through the Inverter. So the transformer > really doesn't function as an isolation transformer to isolate the ship > from shore power since I so rarely get shore power from a dock these days, > but as a device to balance the load on the genset. > > > Norm > S/V Bandersnatch > > > > Norm, what do you do normally do about this? Or do you just have an > > isolation transformer? > > > > > > Ben > > > _______________________________________________ > Liveaboard mailing list > [email protected] > To adjust your membership settings over the web > http://liveaboardonline.com/mailman/listinfo/liveaboard > To subscribe send an email to [email protected] > > To unsubscribe send an email to [email protected] > The archives are at http://www.liveaboardonline.com/pipermail/liveaboard/ > > To search the archives > http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here > http://www.gnu.org/software/mailman/mailman-member/index.html
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