e you hit a nerve. Good luck.. let us know. dbDan BrownFoxfire Energy Corp.Renewable Energy Systems(802)-483-2564www.Foxfire-Energy.comNABCEP #092907-44
Original Message
Subject: [RE-wrenches] ground fault
From: mac Lewis <maclew...@gmail.com>
Date: Tue, October 02, 2012 8:5
Colleagues:
I have been concerned with fundamental problems with how ground fault
detection is accomplished in PV systems. So much so that I wrote two case
studies. See: http://millersolar.com/case_studies/case_studies.html My
conclusions may not be accurate, but I belive the questions are
Matt,
I agree with you on about 98% of this. You are 200% correct that a
faulted high-voltage or high-current PV array is a serious and
dangerous situation and that the person looking for the trouble in a
faulted PV array needs the proper tools and knowledge of how all the
components work. B
Colleagues:
I have been saying for some time that we need to rethink PV ground fault
indicator systems. The fundamentals of existing GFI systems is for the
bond between the grounded-conductor and the grounding-conductor to be
opened upon a ground fault. This bond is important for safety and
e arcing when you land/un-land the jumper &/or remove the fault. If the
sun is shining and you have a DC fault, you will have arcing at some point
when you make/break the circuit. Hopefully it's safely contained and
localized to the contacts of a service disconnect!
Pray for Sun!
Matt Lafferty
: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Tom DeBates
Sent: Monday, April 05, 2010 7:04 PM
To: re-wrenches@lists.re-wrenches.org
Subject: [RE-wrenches] ground fault troubleshooting
hello Wrenches,
We recently had an interesting
hello Wrenches,
We recently had an interesting (amusing?) experience that I thought might be
worth sharing and to get some feedback.
I received a call from a fellow contractor that had a ground fault in his PV
system (Wattsun DA tracker, 24 Siemens (Shell?)110, 1 string, Sunny Boy 2500).
The
Has anyone had any experience with a Magnum 4024 inverter
(sine wave) and breaker box mounted ground fault breakers?
A customers fellow just wired a ground fault outlet and it flashes on and
off with the inverter on, not in sleep mode.
I don't know if it's wired correctly or the brand but th
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