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I see. So they have another box on the ground floor with the "kill"
switch and that box includes a 120/240 vac to 24vdc xfrm to drive
the contactor coil on the roof? So you run 120/240 vac to the box
with the "kill" switch?<br>
<br>
Mark Frye<br>
<div class="moz-cite-prefix">On 2/2/2015 10:52 AM, Glenn Burt wrote:<br>
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Looks
like they use 24VDC for contactor activation, not 120VAC.<o:p></o:p></span></p>
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style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
RE-wrenches
[<a class="moz-txt-link-freetext" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On
Behalf Of </b>Mark Frye<br>
<b>Sent:</b> Monday, February 02, 2015 1:29 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Rapid Shut Down and
the 10 Second Rule Questions<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">OK. So did you
run a line 120V up to the box on the roof to energize the coil
of the relay up there?<br>
<br>
Mark Frye<o:p></o:p></p>
<div>
<p class="MsoNormal">On 2/2/2015 9:13 AM, Jerry Shafer wrote:<o:p></o:p></p>
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<div>
<p class="MsoNormal">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<o:p></o:p></p>
</div>
<p class="MsoNormal">Jerry<o:p></o:p></p>
</div>
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<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On Mon, Feb 2, 2015 at 5:49 AM, Mark
Frye <<a moz-do-not-send="true"
href="mailto:markf@berkeleysolar.com" target="_blank">markf@berkeleysolar.com</a>>
wrote:<o:p></o:p></p>
<div>
<p class="MsoNormal">Jerry,<br>
<br>
What unit did you use?<span style="color:#888888"><br>
<br>
<span class="hoenzb">Mark Frye</span></span> <o:p></o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 2/2/2015 7:43 AM, Jerry
Shafer wrote:<o:p></o:p></p>
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<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p>Wrenches<br>
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.<br>
Jerry<o:p></o:p></p>
<div>
<p class="MsoNormal">On Feb 2, 2015 5:34 AM,
"Christopher Warfel" <<a
moz-do-not-send="true"
href="mailto:cwarfel@entech-engineering.com"
target="_blank">cwarfel@entech-engineering.com</a>>
wrote:<o:p></o:p></p>
<p class="MsoNormal"
style="margin-bottom:12.0pt">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.<br>
<br>
I have read Mr. Brook's article in Solar Pro,
but AHJs may feel differently.<br>
<br>
Would anyone care to weigh in on their
interpretation?<br>
<br>
Thank you, Chris<br>
<br>
<br>
<br>
<br>
<br>
-- <br>
Christopher Warfel, President<br>
ENTECH Engineering, Inc.<br>
PO Box 871, Block Island, RI 02807<br>
<a moz-do-not-send="true"
href="tel:401-466-8978" target="_blank">401-466-8978</a><br>
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