HU361 as Combiner/Disconnect [RE-wrenches]
mlafferty at universalenergies.com
mlafferty at universalenergies.com
Tue Jun 3 11:03:52 PDT 2003
Matt Lafferty
Universal Energies Institute
mlafferty at universalenergies.com
(916) 422-9772
(916) 628-7694 Cell
(916) 914-2247 Fax
www.universalenergies.com
-----Original Message-----
From: Jeff Clearwater [mailto:clrwater at earthlink.net]
Sent: Tuesday, June 03, 2003 10:58 AM
To: RE-wrenches at topica.com
Subject: HU361 as Combiner/Disconnect [RE-wrenches]
Hey Folks,
Any reason an HU361 couldn't be used as a 2 string (or even 3 string)
combiner/disconnect for a single SB? (as long as the combined
string amperage is below the "fuse rating" of each panel?)
Wired as follows:
________ + to SB
l l
0 0 0
0 0 0
l l
l l
l l
+ + from String 2
from String 1
I often use both a rooftop combiner disconnect like the PSSB and then
also put a HU361 in the power shed or basement in cases where one
wants to be able to shut down DC both on roof and near the Sunny Boy.
I have been using the PSSB on the roof (relying on Outback's rating
of being able to put two conductors into a single pole of a PSSB)
with the HU361 in the basement.
But I've never liked the PSSB as a combiner of two conductors on that
PSSB pole. One because I can't test each string separately without
rewiring and 2 because of the risk of one high voltage wire popping
out of that breaker screw. But it dawned on me that reversing the
two pieces of equipment would provide a better combiner. I could
then use two HU361s for that matter as they are cheaper than the PSSB.
Any thing I'm not thinking of here?
Jeff C.
--
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design Associates
Sustainable Energy & Water Solutions for Home & Village
877-SOLARVillage
PO Box 115
Boonville, CA 95415
61 Baker Rd
Shutesbury, MA 01072
413-256-6777, 413-825-0372 (Fax)
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