Kaneka GSA? [RE-wrenches]

[Jeffery Wolfe, Global Resource Options]

We worked with Outback awhile ago to get some 3A circuit breakers for
their stuff for use with Kaneka. They now have them, 150VDC, 100% rated.
So if you're using Kaneka with batteries (lots of wiring) you can string
in 2 parallel strings at least though one CB. No similar solution for
the higher voltage of grid-tied.

Jeff

Jeffery D. Wolfe, P.E.
Global Resource Options, Inc., Solar Energy Solutions
-----Original Message-----
From: Bill Brooks [mailto:bill at brooksolar.com] 
Sent: Wednesday, August 16, 2006 5:04 PM
To: RE-wrenches at topica.com
Cc: 'Travis Creswell, Ozark Solar'
Subject: RE: Kaneka GSA? [RE-wrenches]


So Matt,

What would the appropriate fuse rating be for two series strings in
parallel? 

Assuming the Isc is 1 amp, then Imax = 1 amp x 1.25 = 1.25 amp
[690.8(A)].

Therefore you must subtract the 1.25 amps from the 5 amp rating so the
max fuse rating is 3.75 amps

Two strings in parallel have a max current of 2.5 amps (1.25 x 2), and
the minimum series fuse rating is 2.5 amps x 1.25 = 3.1 amps [690.8(B)].
So the correct number is 3.5 amps.

The only fuse allowable for this arrangement of two strings in parallel
is a
3.5 amp fuse. I'd be interested to see if they have this in their
literature.

Bill.


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