Good feedback. I'll note that we haven't seen any issues with the Eaton 60A, but we decided to go with Square D because it is robust and cost effective.
Jason Szumlanski Florida Solar Design Group On Mon, Jan 3, 2022, 4:49 PM Dave Tedeyan <d...@sungineersolar.com> wrote: > Hi All, > I thought I would follow up to report that I swapped out the old GE 60A > switch with a SQD one, and there have been no blown fuses since! > Cheers, > Dave > > On Tue, Nov 2, 2021 at 4:50 PM Jerry Shafer <jerrysgarag...@gmail.com> > wrote: > >> looks like one more failure, once they start there is no going back as >> the fuse retainer loses its spring >> >> On Tue, Nov 2, 2021 at 1:38 PM Jason Szumlanski < >> ja...@floridasolardesigngroup.com> wrote: >> >>> Ugh - no joke - we just found another one this morning with a blown >>> fuse. Pic attached. It's really a nightmare. >>> >>> Check out how discolored the top of the left fuse is (again). Always the >>> same fault... >>> >>> Jason Szumlanski >>> Florida Solar Design Group >>> >>> >>> >>> >>> On Mon, Nov 1, 2021 at 8:43 PM Jason Szumlanski < >>> ja...@floridasolardesigngroup.com> wrote: >>> >>>> See attached image. Notice the discoloration on the top of the left >>>> fuse. It's always the same thing, same place. >>>> >>>> Jason >>>> >>>> On Mon, Nov 1, 2021, 8:30 PM Jason Szumlanski < >>>> ja...@floridasolardesigngroup.com> wrote: >>>> >>>>> I should also mention that it has nothing to do with ambient heat. >>>>> This has occured in all seasons and with disconnects in direct sunlight on >>>>> a south wall and disconnects in air conditioned garages. >>>>> >>>>> It's just a garbage product. We switched to Square D for 60A D222NRB >>>>> fusible disconnects and are also using their 100A circuit breaker >>>>> enclosures which are cost effective. The D223NRB is also a good fusible >>>>> disconnect, but pricey. >>>>> >>>>> Jason >>>>> >>>>> >>>>> On Mon, Nov 1, 2021, 8:24 PM Jason Szumlanski < >>>>> ja...@floridasolardesigngroup.com> wrote: >>>>> >>>>>> It's the disconnect. We had dozens of this subpar disconnect design >>>>>> fail on Enphase systems. The 2 Pole has the same issue. >>>>>> >>>>>> GE gave us some nonsense answer that it's General Duty and not >>>>>> designed for continuous high power. Even 40A combined Enphase systems >>>>>> will >>>>>> blow a 60A fuse. >>>>>> >>>>>> What you will find is the fuse will blow on one side and then >>>>>> replacements will blow at decreasing intervals until it blows daily. Our >>>>>> experience is the left side (of the 2-pole) is far more problematic for >>>>>> some odd reason. It's not the fuse brand either. >>>>>> >>>>>> I believe the design fault is how the blades only hit a single >>>>>> contact on one side when they close. The Square D alternative has the >>>>>> blade >>>>>> slipping between two contacts. >>>>>> >>>>>> Sadly we have had to replace so many of these and most are supply >>>>>> side interconnections, which make it tricky and expensive. >>>>>> >>>>>> Jason Szumlanski >>>>>> Florida Solar Design Group >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> On Mon, Nov 1, 2021, 4:26 PM Dave Tedeyan <d...@sungineersolar.com> >>>>>> wrote: >>>>>> >>>>>>> Hi All, >>>>>>> >>>>>>> I am servicing a system that keeps blowing fuses on the AC side, >>>>>>> although it >>>>>>> appears that everything is sized correctly. It is a SolarEdge >>>>>>> SE11400A-US inverter. >>>>>>> Max continuous output current is 47.5A x 1.25 = 59.4A. There is a >>>>>>> GE TG3222R >>>>>>> 60A AC disconnect, and it is wired up with #6 THHN wire. The >>>>>>> terminals were tight >>>>>>> and there was no evidence of arcing or burning in the past. This is >>>>>>> indoors, and not >>>>>>> exposed to sunlight. No extra conductors are in the conduit. >>>>>>> >>>>>>> But they say that they need to replace a fuse roughly once per >>>>>>> month. Has anyone >>>>>>> seen this before? Could there be some kind of fault in the inverter >>>>>>> itself that >>>>>>> occasionally induces extra current? Is there any way to tweak the >>>>>>> settings so that it >>>>>>> actually produces a bit more than 11.4kw? I appreciate your >>>>>>> thoughts. >>>>>>> >>>>>>> Cheers, >>>>>>> Dave >>>>>>> >>>>>>> -- >>>>>>> [image: Logo] <https://www.sungineersolar.com/> >>>>>>> Dave Tedeyan, P.E. >>>>>>> Owner | Sungineer Solar >>>>>>> p: he | him | his >>>>>>> a: 1653 Slaterville Rd. | Ithaca, NY 14850 >>>>>>> w: www.sungineersolar.com <http://www.sungineersolar.com/> >>>>>>> c: (607) 288-2898 >>>>>>> _______________________________________________ >>>>>>> List sponsored by Redwood Alliance >>>>>>> >>>>>>> Pay optional member dues here: http://re-wrenches.org >>>>>>> >>>>>>> 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 >>>>>>> >>>>>>> There are two list archives for searching. When one doesn't work, >>>>>>> try the other: >>>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>>>>> >>>>>>> List rules & etiquette: >>>>>>> http://www.re-wrenches.org/etiquette.htm >>>>>>> >>>>>>> Check out or update participant bios: >>>>>>> http://www.members.re-wrenches.org >>>>>>> >>>>>>> _______________________________________________ >>> List sponsored by Redwood Alliance >>> >>> Pay optional member dues here: http://re-wrenches.org >>> >>> 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 >>> >>> There are two list archives for searching. When one doesn't work, try >>> the other: >>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>> >>> List rules & etiquette: >>> http://www.re-wrenches.org/etiquette.htm >>> >>> Check out or update participant bios: >>> http://www.members.re-wrenches.org >>> >>> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> 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 >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> > > -- > [image: Logo] <https://www.sungineersolar.com/> > Dave Tedeyan, P.E. > Owner | Sungineer Solar > p: he | him | his > a: 1653 Slaterville Rd. | Ithaca, NY 14850 > w: www.sungineersolar.com <http://www.sungineersolar.com/> > c: (607) 288-2898 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > 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 > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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