Thanks David, I was in residential mode and just saw the 240V listed in
the OCPD table!
On 2012/8/30 16:47, David Brearley wrote:
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 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 <[email protected]
<mailto:[email protected]>> 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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