Looks like they use 24VDC for contactor activation, not 120VAC.
*From:*RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]
*On Behalf Of *Mark Frye
*Sent:* Monday, February 02, 2015 1:29 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Rapid Shut Down and the 10 Second Rule
Questions
OK. So did you run a line 120V up to the box on the roof to energize
the coil of the relay up there?
Mark Frye
On 2/2/2015 9:13 AM, Jerry Shafer wrote:
The units we have used have a large contactor inside the combiner
box made by AMtec Solar. this was required to control the shut
down includes a fire button done on the ground floor
Jerry
On Mon, Feb 2, 2015 at 5:49 AM, Mark Frye <ma...@berkeleysolar.com
<mailto:ma...@berkeleysolar.com>> wrote:
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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