I do not have an answer either but it sounds like a string intermittent fault I had a somewhat similar where when it rained a fuse would blow. it was caused by a screw penetrating a wire
On Sat, Mar 17, 2018 at 10:26 PM, Jerry Shafer <jerrysgarag...@gmail.com> wrote: > Wrenches > I have a question that I do not have an answer for that I can prove, here > it is, I have 25 ABB 20 k. three phase inverters on a .5 meg ground mount > site , I have also seen this on systems with SMA tripower and Fronius 8.2 > and trio inverters on roof mounted systems, intermittently one combiner > will blow a fuse and 9 times out of 10 it will be a negative fuse. PPA > holders or CFO's of these systems would like to know why and other than a > wake up surge or shade issue which could effect the negative side but > that's really a stretch to say for sure. We have sites located in dry and > wet locations around the islands, we have different brands of inverters but > the fuses are what the inverter manufacture included in their > combiner/switches. I am proposing to only use a slow blow fuse in the > future with all of our new systems regardless of what is included in the > combiners but with hundreds of fuses out there its a tough call to replace > as they fail or just for it and change them all in advance per site. I Look > forward to your thoughts and ideas, maybe its something else altogether. > Jerry > > _______________________________________________ > 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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