Jerry,
What unit did you use?
Mark Frye
On 2/2/2015 7:43 AM, Jerry Shafer wrote:
Wrenches
We have installed some of these rapid shut down units and they are
always located close to the array and ours kill the DC instantly as
long as the inverter was running when this accures did not test it
with inverters already off.
Jerry
On Feb 2, 2015 5:34 AM, "Christopher Warfel"
<cwar...@entech-engineering.com
<mailto:cwar...@entech-engineering.com>> wrote:
We have a interpretation problem among some people I work with
with, and 690.12 Rapid Shut Down and the the 10 second time for
reducing ac and dc conductors to 240ma, and 30V. The word
"initiation" seems to indicate that all affected conductors need
to be at these levels within 10 seconds of de-energizing either
the ac or dc conductors. If so, then the disconnects need to be
co-located to meet this requirement if this interpretation is correct.
I have read Mr. Brook's article in Solar Pro, but AHJs may feel
differently.
Would anyone care to weigh in on their interpretation?
Thank you, Chris
--
Christopher Warfel, President
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
401-466-8978 <tel:401-466-8978>
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