HI all FYI I am rushed with problems, but I hope this helps. My 12 inverter Outback system supports 3 phase 120/208 volt, But it can not do standalone operation on any more than 2 inverters legally. (therefor no Stand alone 3 phase with my system) In my case Outback demonstrated 3 phase standalone, but there are 1741 issues I believe. I also know they are close, but are putting some final touches on the last of some problem.
Sorry for so little information, Darryl --- On Tue, 7/29/08, Phil Undercuffler <[EMAIL PROTECTED]> wrote: > From: Phil Undercuffler <[EMAIL PROTECTED]> > Subject: Re: [RE-wrenches] Three-Phase Generator feeding Series/Parallel Quad > Stack > To: "RE-wrenches" <[email protected]> > Date: Tuesday, July 29, 2008, 11:59 AM > William, I believe you're right about the 180 degree / > 120 degree differential. This is similar to the condition > that fried the input relays on a handful of XW inverters > which were connected to 120/208 three phase inputs. In > fact, Xantrex published a technical bulletin about the > issue, available at > http://www.xantrex.com/web/id/246/p/docs/pt/18/product.asp > > To quote, "Input power ... cannot be simply derived > from a phase or line voltage of a three phase 208:120Y or > 240VΔ AC source. Instead of cancelling each other as they > would with a split-phase source, each 120° out-of-phase > leg effectively creates a short circuit (limited by the > impedance of the transformer and the wiring), which leads > to very high currents flowing on the neutral line causing > imminent failure of the inverter's AC relay > board." > > The bad news is, Classic Stacking won't solve the > problem; Classic is limited to two inverters max, and this > installation is a quad. I'm also not sure whether the > excessive current flowing on neutral issue would be > resolved with the elimination of the transformer, and > whether the problem would then just move upstream to the > next weakest link, the input relays of the FX. > > Xantrex's solution in that technical bulletin (big > transformer taking off 1 leg of 3 phase service, converting > to 240v) obviously won't work to balance the generator, > nor will parallel stacking the quad stack. I would look > into rewiring the genset for 120/240v output, or go hunting > for three phase converters. > > > ------------------------------------------------------------ > > Phil Undercuffler > Director, Battery-based and Off-grid > Conergy, Inc. > Our World is Full of Energy > > 1730 Camino Carlos Rey Suite 103 > Santa Fe NM 87507 USA > Office | 505.216.3841 > Fax | 505.473.3830 > www.conergy.us > > ------------------------------------------------------------ > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of William Miller > Sent: Tuesday, July 29, 2008 9:30 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] Three-Phase Generator feeding > Series/Parallel Quad Stack > > Nick: > > Here's my best guess: The X240 is configured to work > with power legs with > 180 degree phase differential. A 3 phase source has 120 > degree phase > differential. This 120 degree phase differential shows as > some degree of > direct short to the source. > > Solution: I would forego the X240 and change the stacking > configuration to > Classic stacking. Eliminate any shared neutrals to avoid > neutral over-current. > > William Miller > > > At 08:09 AM 7/29/2008, you wrote: > >Hello good folks in the RE world! An off grid customer > of mine has a VFX > >Quad Stack wired exactrly like page 20 in the FX > manual, including the > >X-240 balancing transformerconnected to the panel > output legs. He has been > >feeding it with two legs of a three-phase diesel > generator. IS THIS A > >COMPLETE NO-NO??? HE KNOWS THAT IT WILL RESULT IN AN > UNBALANCED GEN > >OUTPUT, BUT SO FAR IT HAS BEEN WORKING OK, BUT WITH THE > FOLLOWING GLITCH: > >WITH THE GENSET OFF------THE OUTBACK POWER PANELOUTPUT > BUSSES ARE BOTH > >ENERGISED ONLY WHEN THE x-240 BREAKERS ARE ON. AS SOON > AS THE GENERATOR > >STARTS (AGS SYSTEM) THIS 20 AMP DOUBLE BREAKERSEE PAGE > 20, X-240) TRIPS > >IMMEDIATLEY, LEAVING HALF THE LOADS WITHOUT POWER (NO > OUTPUT FROM THE LEG > >2 INVERTERS TO THE HOT 2 OUT BUSS) i'M BAFFELED, > COULD SOMEBODY PLEASE > >EXPLAIN THIS SITUATION TO ME SO THAT i CAN HELP THEM > OUT? Another > >electrician told them that a buck/boost transformer (on > the gen > >output?)would be the fix. Thanks a bunch in advance for > your help in this > >serious matter. Nick Houser Off Grid Services, Powell > River, BC > > > _______________________________________________ > List sponsored by Home Power magazine > > [email protected] > > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out participant bios: www.mrsharkey.com/wrenches/ > > _______________________________________________ > List sponsored by Home Power magazine > > [email protected] > > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out participant bios: www.mrsharkey.com/wrenches/ _______________________________________________ List sponsored by Home Power magazine [email protected] http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out participant bios: www.mrsharkey.com/wrenches/
