<div dir="ltr"><div>You can use a Fluke 435 series, it will reveal any harmonics and record the energy levels for each harmonic. It has a scope feature. You can rent one pretty cheaply and record 24 hours of data. I can send you a sample report from mine if you want.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Nov 13, 2016 at 9:36 PM, Dave Tedeyan <span dir="ltr"><<a href="mailto:dtedeyan@taitem.com" target="_blank">dtedeyan@taitem.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Howie, <div>Yes, we have actually already replaced both inverters on site and the</div><div>issues are still happening. At this point I doubt that we could have </div><div>gotten 4 units with faulty arc fault sensors...</div><div><br></div><div>Drake, </div><div>I am beginning to think that it may be some noise from the utility.</div><div>Would you know of a way to test for this? eGague unit maybe?</div><div><br></div><div>Cheers, </div><div>Dave</div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div class="m_-3403618299612289586gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><span class=""><div><br></div><div><b><font face="arial, helvetica, sans-serif">--</font></b></div><div><b><font face="arial, helvetica, sans-serif"><br></font></b></div><div><b><font face="arial, helvetica, sans-serif">Dave Tedeyan</font><br></b></div><div><b>Project Engineer</b></div><div><br></div><div><b>Taitem Engineering, PC</b></div></span><div>109<font color="#000000"> S. Albany Street, Ithaca, NY 14850</font></div><div><font color="#000000">Voice: <a value="+16072771118">(607) 277-1118 x121</a></font></div><div><a href="http://www.taitem.com/" target="_blank"><font color="#000000">www.taitem.com</font></a></div></div></div></div><div><div class="h5">
<br><div class="gmail_quote">On Fri, Nov 11, 2016 at 10:15 AM, Drake <span dir="ltr"><<a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank">drake.chamberlin@<wbr>redwoodalliance.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
Electrical noise coming in from the utility side can also cause an arc
fault code.<span><br><br>
At 07:32 AM 11/11/2016, you wrote:<br>
</span><blockquote type="cite" class="m_-3403618299612289586m_-8393085904659791530cite"><span>This array is a ground mount, so
not on a roof, and no radio towers nearby.<br><br>
As for grounding, The array and the shed with the interconnection point
are in the same area.<br></span>
There are a couple ground rods there, which everything on the AC side is
connected to, <br>
including a #6 wire from each inverter. there is just a #10 ground coming
from the array to the inverters. <br><span>
The house is a couple hundred feet away and has its own grounding
electrode system.<br><br>
Jerry,<br>
The inverters are new (replaced 2 months ago), but it is a good idea to
check firmware.<br>
As for AC loads, nothing stands out as the types of things you mentioned,
although there<br>
may be a well pump. They also do have a large water storage tank for
heating, but they<br>
say that they have not needed to use it yet this year. Then there is also
the generator...<br><br>
Thanks for your recommendations.<br>
-Dave<br><br>
<br><br>
<font face="arial"><b>--<br><br>
Dave Tedeyan</b></font><br>
Project Engineer<br>
<br>
<b>Taitem Engineering, PC<br>
</b></span>109Â S. Albany Street, Ithaca, NY 14850<br>
Voice:Â <a href="http://??" target="_blank">(607) 277-1118 x121</a><span><br>
<a href="http://www.taitem.com/" target="_blank">www.taitem.com</a><br>
<br>
On Thu, Nov 10, 2016 at 9:51 PM, Jerry Shafer
<<a href="mailto:jerrysgarage01@gmail.com" target="_blank">jerrysgarage01@gmail.com</a>
> wrote:<br>
</span><dl>
<dd>Dave.<br>
</dd><dd><span>We have many TL-22 in the field and they will detect faults even when
they are normal contactor faults, have you made sure the SW is the
latest, last I checked it is 2.65.3R and it may have a patch in there,
you can turn off the feature for testing only and see if you melt
something down but if you do please be on site as a arc may happen. Do
you have a well, AC system with contacts, welders, compressors, anything
that has a dry contacts that brakes under load, this is another place I
would look. Every time we have had a code out it was real weather from
something normal or a wire issue. Not to brag but we have hundreds in the
field from the 3's to the 24's and as much as I dread getting a call with
this issue I can usually find the problem and it can be either AC or
DC.<font color="#888888"><br>
</font></span></dd><dd><font color="#888888">Jerry <br>
</font></dd><br>
<dd><span>On Thu, Nov 10, 2016 at 8:14 AM, Dave Tedeyan
<<a href="mailto:dtedeyan@taitem.com" target="_blank">dtedeyan@taitem.com</a>>
wrote:<br>
</span><dl>
<dd>Hi All, <br><br>
</dd><dd><span>Maybe someone will have some ideas for why a couple inverters keep
arc faulting:<br><br>
</span></dd><dd><span>-There are two SB7000TL-22 inverters, Sunpower branded.<br>
</span></dd><dd><span>-3 Strings of 7 SPR-327's to each inverter. Kept separate until the
inverter.<br>
</span></dd><dd><span>-Ground mount about 50' from the shed where the inverters are located
(indoors)<br>
</span></dd><dd><span>-Simple grid connected system, no batteries.<br>
</span></dd><dd><span>-There is a whole house generator co-located in the shed.<br>
</span></dd><dd><span>-We interconnect by using piercing taps on the line side of the
generator transfer switch<br>
</span></dd><dd><span>-There has been only one power outage there since the system was
installed in April, but the generator fires up weekly.<br><br>
</span></dd><dd><span>-The arc faults have been happening on both inverters. Sometimes only
one at a time, sometimes both will go within a day of each other.<br>
</span></dd><dd><span>-The events have been approximately one a month, but sometimes more,
sometimes less.<br><br>
</span></dd><dd><span>-We have already checked every single connection in the system twice,
by two different people.<br>
</span></dd><dd><span>-We have replaced the underground wires (and they looked just
fine)<br>
</span></dd><dd><span>-We have replaced all home runs.<br>
</span></dd><dd><span>-We have replaced both inverters.<br>
</span></dd><dd><span>-Arc faults are still happening.<br>
</span></dd><dd><span>-Arc faults are not always on the same day/time of the week.<br><br>
</span></dd><dd>I am wondering if this can be caused by the generator? <br>
</dd><dd><span>Has anyone run into a situation like this or something
similar?<br><br>
</span></dd><dd>Thanks for your help,<br>
</dd><dd>Dave<span class="m_-3403618299612289586HOEnZb"><font color="#888888"><br><br>
</font></span></dd><dd><span class="m_-3403618299612289586HOEnZb"><font color="#888888"><font face="arial">--<br><br>
</font></font></span></dd><dd><font color="#888888"><font face="arial">Dave Tedeyan</font></font></dd><font color="#888888"><br>
</font><dd><span class="m_-3403618299612289586HOEnZb"><font color="#888888">Project Engineer<br>
<br>
</font></span></dd><dd><span class="m_-3403618299612289586HOEnZb"><font color="#888888">Taitem Engineering, PC<br>
</font></span></dd><dd><span class="m_-3403618299612289586HOEnZb"><font color="#888888">109Â S. Albany Street, Ithaca, NY 14850<br>
</font></span></dd><dd><span class="m_-3403618299612289586HOEnZb"><font color="#888888">Voice:Â <a href="http://??" target="_blank">(607) 277-1118 x121</a></font></span><div><div class="m_-3403618299612289586h5"><br>
</div></div></dd><dd><a href="http://www.taitem.com/" target="_blank">www.taitem.com</a><br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Chris Mason<div><div style="color:rgb(136,136,136)"><span style="font-size:13px">NABCEP Certified Solar PV Installer™</span></div><div style="color:rgb(136,136,136)"><span style="color:rgb(34,34,34)">Solar Design Engineer</span></div><div style="color:rgb(136,136,136)"><span style="font-size:13px">Generac Generators Industrial technician</span></div></div><div style="color:rgb(136,136,136)"><span style="font-size:13px"><br></span></div><div><a href="http://www.cometenergysystems.com" target="_blank">www.cometsolar.com</a></div><div>264.235.5670</div><div>869.662.5670</div><div>Skype: netconcepts</div></div></div>
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