I wondered the same thing. If a person fed the secondary side of a transformer, and the primary side was fed from a service with GFP, would it mater if the GFP was able to be backfed?
Hope the question makes sense! Jesse Sent from my iPhone On Mar 25, 2011, at 1:13 PM, "Glenn Burt" <[email protected]> wrote: > We have had success in many cases, contacting the manufacturer of the > installed breaker and asking if the device was suitable for backfeeding (ala > solar). Some will certify that it is OK, some do not. > > Glenn Burt > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Hans > Frederickson > Sent: Friday, March 25, 2011 1:16 PM > To: 'RE-wrenches' > Subject: [RE-wrenches] Backfeeding GFP devices > > Wrenches, > I'm looking at a fair number of school projects these days. So far, every > school service I've looked at has a ground fault protection device at the > main service disconnect. I just completed a 75kW school project where we did > a line side tap. The panel gear was old, maybe 1960s Federal Pacific. > Lately, I've been looking at schools with newer gear. > > In SolarPro 2.4, the "Can We Land?" article mentions the possibility of > getting a GFP device that is capable of being backfed. Has anyone seen or > used such a device in conjunction with a big service? Are there any known > manufacturers of GFP devices that are listed for backfeeding? For a current > project, I would like to backfeed a GFP device that is controlling a 3000A > switch on a 480V service. > > Also, because I'm a curious person, I'm wondering if anyone has ever backfed > a GFP device not listed for that use, perhaps without realizing it, and what > the result was? > > Thanks, > -Hans > > Hans Frederickson > Estimator / Project Manager > Frederickson Electric, Inc. > (360) 385-1395 > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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 > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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 > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] 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
