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 Installer™ (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
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