Again this is FMI for my information, Did not Square D change there rating for PV systems? Darryl
--- On Fri, 6/26/09, Phil Undercuffler <solarp...@gmail.com> wrote: > From: Phil Undercuffler <solarp...@gmail.com> > Subject: Re: [RE-wrenches] fronius IG Plus practical engineering WAA??? <snip> > > This confirmed my understanding > that the limiting factor > on the 30A switch > > in a photovoltaic applications is > not 30A * 0.8. The limiting factor > is 18A > > per pole or 11.5A Isc per pole. > > <unsnip> > > > > To clarify – the 18A per pole / > 11.5A Isc per pole only > applies if you are using the limited listing for PV > applications, with one > string or subarray per pole. If you > wire > the HU361RB disconnect with two poles connected in series, > then you may run the > switch at 100% of its rating. > > > > Therefore, you can stuff up to 24 > amps Isc (24 * 1.25 = > 30) through a single disconnect if the poles are wired in > series, or you can > run 3 subarrays each with no more than 11.5A per pole if > wired in > parallel. > > > > Sometimes it’s good to have > options. > > > > > > > > Phil Undercuffler > > Director, Battery-based and > Off-grid > > Distribution Sales Group > > Conergy > > Our World Is Full of Energy > > 1730 > Camino Carlos Rey Suite 103 > > Santa > Fe, NM 87507 > > p.undercuff...@conergy.us > > Direct > | > 505.216.3841 > > Toll Free | 888.396.6611 x4841 > > Fax | 505.473.3830 > > www.conergy.us > > > > -----Inline Attachment Follows----- > > _______________________________________________ > 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 > > _______________________________________________ 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