I'm assuming it's a balanced 3-phase interconnection, which fits with the reported phase current of 42 A:
(3 x 5000 W) / 208 V / 1.73 = 41.7 A Or more simply: 24 A per inverter x 1.73 = 41.5 A However, no one reviewing a single-line should have to guess about the service type.... On Aug 30, 2012, at 3:12 PM, Dave Click wrote: > I've seen that one a lot, too. And not to quibble, but the 1-line depicts > this correctly (no inline fuse shown in the inverter DC disconnect box), > though there should be a note making this more explicit. > > Speaking of sunny days turning off the system, how about the 3 30A inverter > breakers' combined feed going into a 55A breaker. Also... a 55A breaker? > Really? I guess the designer wanted to leave a little headroom to avoid > scaring the 60A disconnect. > > DKC > > On 2012/8/30 14:35, Andrew Truitt wrote: >> >> Ahh yes, the old "combine strings before landing on a fused DC input >> terminal" trick. Sure to blow the fuse the first sunny day. This is >> why SMA created their fuse-bypass DC input terminal. I take it the >> installer was not aware of this... >> >> >> >> For a brighter energy future, >> >> >> Andrew Truitt >> NABCEP Certified PV Installerâ„¢ (ID# 032407-66)____ >> >> Principal >> Truitt Renewable Energy Consulting____ >> >> (202) 486-7507 <tel:%28202%29%20486-7507>____ >> >> http://www.linkedin.com/pub/andrew-truitt/8/622/713 >> >> >> >> "Don't get me wrong: I love nuclear energy! It's just that I prefer >> fusion to fission. And it just so happens that there's an enormous >> fusion reactor safely banked a few million miles from us. It delivers >> more than we could ever use in just about 8 minutes. And it's wireless!" >> >> ~William McDonough >> >> >> >> >> >> >> On Thu, Aug 30, 2012 at 11:53 AM, Jason Szumlanski <ja...@fafcosolar.com >> <mailto:ja...@fafcosolar.com>> wrote: >> >> I was sent to look at another contractor's work, and found three >> SB5000 inverters with blown string input fuses. I was able to >> determine the reason pretty quickly, and was later sent the original >> 1-Line, which was installed per the drawings. The 1-Line came from a >> "leading system integrator" who shall remain nameless. >> >> See anything wrong? >> >> https://www.sugarsync.com/pf/D6539806_8669786_010829 >> >> Just goes to show you - the contractor needs to take responsibility >> and verify the specifications are correct, safe, and code compliant. >> >> Jason Szumlanski >> Fafco Solar >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> <http://www.re-wrenches.org/etiquette.htm> >> >> Check out participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org> >> >> >> >> >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Options & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org