Are they single or three phase inverters? Connected on the load or supply side?
Brian > On Aug 4, 2014, at 7:09 PM, Chris Mason <cometenergysyst...@gmail.com> wrote: > > If you are using a load center to aggregate the inverter outputs, swap the 3 > pole breaker for three single poles. Hopefully you can demonstrate only one > inverter works. > If the UL listing tests and certifies for this, why do they need to do it in > the field? Next they will want you to set up a full lab test suite. > > >> On Mon, Aug 4, 2014 at 8:56 PM, Jerry Shafer <jerrysgarag...@gmail.com> >> wrote: >> If you using a AC disconnect shut off power to it install a jumper on two of >> the legs just testing once inverter is back on line pull the switch and see >> what happens. Swap jumper location and tetest, once you tesy all legs remove >> jumper wires. >> >>> On Aug 4, 2014 7:43 AM, "Rebekah Hren" <rebekah.h...@gmail.com> wrote: >>> Al, >>> I have witnessed this test in NC several times, but with medium voltage >>> connected systems, not systems connected to a building service. A medium >>> voltage subcontractor used a disconnect stick to open one phase at a time >>> at the fused cutout point of delivery to the distribution network (on the >>> high side of the transformers) . We learned to do the test early in the >>> morning with the array divided in subsections to keep the current as low as >>> possible at the POD because there is an arc pulled when one phase is >>> opened. >>> >>> The phase current was being monitored during the test to insure that the >>> inverters stopped exporting current to the other two phases when one phase >>> was lost. >>> It's been awhile, so there may be a better/safer way to do this test for MV >>> connected systems now that I'm not aware of...would be happy to hear about >>> it if so. >>> >>> If this is a PV system connected to a building service this wouldn't be the >>> way to do this test. >>> Cheers, >>> Rebekah Hren >>> >>> >>> >>>> On Mon, Aug 4, 2014 at 11:24 AM, Allen Frishman <amfr...@aeonsolar.com> >>>> wrote: >>>> Wrenchers, >>>> The Ct Utility company CL&P requires the following as part of the >>>> verification test. >>>> "Because this is a three-phase service, the witness test must also >>>> demonstrate that the inverter shuts down upon loss of each individual >>>> phase" >>>> >>>> Any recommendations on how to do this test safely? >>>> Al Frishman >>>> AeonSolar >>>> >>>> (917) 699-6641 - cell >>>> (888) 460-2867 >>>> www.aeonsolar.com >>>> >>>> >>>> >>>> _______________________________________________ >>>> 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 >>> >>> >>> >>> -- >>> Tel: 336.266.8800 >>> NABCEP Certified Solar PV Installation Professional™ 091209-85 >>> NC Licensed Electrical Contractor >>> >>> _______________________________________________ >>> 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 > > > > -- > Chris Mason > NABCEP Certified Solar PV Installer™ > Solar Design Engineer > Generac Generators Industrial technician > > www.cometsolar.com > 264.235.5670 > 869.662.5670 > Skype: netconcepts > _______________________________________________ > 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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