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Right, so the the "kill" switch is not really needed, but yet it is
required....! ?<br>
<br>
<div class="moz-cite-prefix">On 2/2/2015 1:09 PM, Jerry Shafer
wrote:<br>
</div>
<blockquote
cite="mid:CAMUFgmWXnheGJvRK8ET+v=fzGUkr4=ZVdO6_vmpyRqSWppgouA@mail.gmail.com"
type="cite">
<p dir="ltr">You pull the meter you close the contact thats it so
ypu dont hit the button but same results</p>
<div class="gmail_quote">On Feb 2, 2015 11:06 AM, "Mark Frye" <<a
moz-do-not-send="true" href="mailto:markf@berkeleysolar.com">markf@berkeleysolar.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> I really do wonder
then...<br>
<br>
Right now, you go up to the burning house and pull the
meter, bingo, no AC anywhere. So why do we need the "kill"
switch next to the service (or where ever).... IF you drive
the roof top contactor with 120vac or with 24 vdc made from
a power supply powered by 120vac. Either way, pull the
meter, no more AC and no more power to the contactor coil on
the roof, so DC limited to the location of the contactor. <br>
<br>
Not really sure how the requirement for the stop switch got
into the Code.<br>
<br>
Mark Frye<br>
<br>
<div>On 2/2/2015 11:11 AM, Mark Frye wrote:<br>
</div>
<blockquote type="cite"> 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>On 2/2/2015 10:52 AM, Glenn Burt wrote:<br>
</div>
<blockquote type="cite">
<div>
<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.</span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p>
<div>
<div style="border:none;border-top:solid #b5c4df
1.0pt;padding:3.0pt 0in 0in 0in">
<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 moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org"
target="_blank">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</span></p>
</div>
</div>
<p class="MsoNormal"> </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</p>
<div>
<p class="MsoNormal">On 2/2/2015 9:13 AM, Jerry
Shafer wrote:</p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<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</p>
</div>
<p class="MsoNormal">Jerry</p>
</div>
<div>
<p class="MsoNormal"> </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:</p>
<div>
<p class="MsoNormal">Jerry,<br>
<br>
What unit did you use?<span
style="color:#888888"><br>
<br>
<span>Mark Frye</span></span> </p>
<div>
<div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"> </p>
<div>
<p class="MsoNormal">On 2/2/2015 7:43
AM, Jerry Shafer wrote:</p>
</div>
<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</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:</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>
<br>
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