Sq D as combiner box [RE-wrenches]
Phil Undercuffler
phil at positivenergy.com
Wed Apr 4 07:51:21 PDT 2001
Can't see why not, although my understanding is that the Heineman breaker
will not provide the AIC that the QO needs--you must use a current limiting
fuse.
Also no reason why you can't make it a surface mount box at the power
center, run separate conductors for each series string (easier to pull 4
pairs of #6 or 8 than one pair of 1/0, after all). You could tie the busses
together to eliminate double lugging and use a backfed (backsupplied?)
breaker as the array disconnect.
Phil Undercuffler
Positive Energy
----- Original Message -----
From: David Palumbo, Independent Power & Light <ipl at sover.net>
To: Wrenches <RE-wrenches at topica.com>
Sent: Wednesday, April 04, 2001 9:12 AM
Subject: Sq D as combiner box [RE-wrenches]
> Are Square D breakers considered suitable for series fusing pv array?
> You would still have a Heinemann breaker, or RK5 fuse, or Class T fuse in
> your DC disconnect box for catastrophic protection.
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