Always as close to the batteries as practical, remember is does not have to be at the end, between any dattery in that string, as a safe precausion at the 24 volt point is nice at it will keep the peak voltage at 24 vs the bank of 48 if in open position. Jerry
On Dec 3, 2017 5:10 PM, "jay" <[email protected]> wrote: > So I”m curious about the location of your breakers. Can you elaborate > about that? > > Thanks > jay > > peltz power > > > > On Dec 2, 2017, at 1:51 PM, Gary Willett <[email protected]> > wrote: > > > > JERRY: > > > > I always specify separate breakers per string (175A or 250A, depending > on string ampacity) mounted as close to the battery bank as possible. And I > require that if I am to be engaged for maintenance (planned or unplanned) > after commissioning. Shunt-trip breakers facilitate meeting Rapid Shutdown > requirements. > > > > Separate string breakers make battery maintenance and trouble shooting > so much easier and well worth the first cost investment. Especially so when > you have bad or weak cells/batteries, uneven string discharge/charge > current, and need to isolate the culprit(s). > > > > If I have a maintenance arrangement with the customer, individual string > breakers allow me to quickly/safely perform string/battery SOH (state of > Health) testing with an internal resistance tester and/or a load test on > individual batteries without removing wiring/busbars/etc. > > > > Regards, > > > > Gary Willett PE > > Icarus Engineering / Solar Services LLC > > > > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: http://www.mail-archive.com/[email protected]. > 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: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/[email protected]/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
