Any time we do a ground array, at the array location we combine the strings and have a disconnect and it has come in handy to On Oct 6, 2014 10:41 AM, "Mark Westbrock" <westbr...@positiveenergysolar.com> wrote:
> If you don't want to combine strings at the array, then I would use a > Square D HU361 for each string. It is a lot of hardware, but not too > expensive and very straightforward for a lay person to shut off without > risk. > > Cheers, > > Mark > > ---- > *Mark Westbrock* > Field Manager & Employee-Owner > NM EE98J Journeyman Electrician > NABCEP Certified PV Installation Professional > NABCEP Certified PV Technical Sales > > > <http://positiveenergysolar.com/> > > Positive Energy, Inc. > 510 S. Main St. > Las Cruces, NM 88001 > office: 575-524-2030 > cell: 575-640-2432 > m...@positiveenergysolar.com <westbr...@positiveenergysolar.com> > www.positiveenergysolar.com > > > > <http://www.nabcep.org/installer-locator?state=NM> > <http://www.nabcep.org/installer-locator?state=NM> > <http://www.solarreviews.com/installers/positive-energy-solar/> > <http://www.bcorporation.net/> > > On Mon, Oct 6, 2014 at 1:13 PM, All Solar, Inc. <allso...@scswifi.net> > wrote: > >> How about the Midnite Solar four pole disconnect? >> Can't remember the model number but recently installed one on a two >> string TL input circuit. They are made for disconnecting both positive and >> negative. >> >> Jeremy Rodriguez, >> President >> >> All Solar, Inc. >> 1463 M >> Penrose Colorado 81240 >> 719-372-3808 office >> 719-372-3804 fax >> www.asolarelectric.com >> >> Sent by Jeremy's iPhone. Sorry for typos and shorthand! >> >> On Oct 6, 2014, at 12:40 PM, "William Miller" <will...@millersolar.com> >> wrote: >> >> Wrenches: >> >> >> >> We are getting up to speed on using transformer-less inverters. I have >> advocated long for the additional safety offered by these inverters but I >> am realizing the trade-offs with the new technology: The implementation >> gets more complicated with the requirement for PV wire, OCPD and >> disconnecting means for plus and minus and plus providing Arc Flash rated >> equipment. >> >> >> >> I am currently designing a system that will locate the PV about 400 feet >> from the residence. The system will utilize 2 Solectria 5200 watt >> inverters at the residence. I would like to provide disconnecting means >> for the 4 strings at the array, in case of any needed service or >> excavating. Preferably I’d like the disconnecting means to be deployable >> by a lay person (i.e. the gardener). >> >> >> >> Finding an 8 pole, arc flash, 600 VDC rated disconnect is not easy. I >> could install an Outback 8 circuit combiner with 8 touch-safe fuse >> holders. The new combiners have had dead-fronts for a while now. The >> gardener needs only to have a Philips screw driver to open this cover. Any >> better ideas out there? >> >> >> >> Thanks, >> >> >> >> William >> >> >> >> >> >> <image002.jpg> >> Lic 773985 >> millersolar.com <http://www.millersolar.com/> >> 805-438-5600 >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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