[RE-wrenches] Fuses

[Darryl Thayer]

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 <jerrysgarage01 at 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 at 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
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20180318/c8c8f650/attachment.htm>