<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">
I also had a faulty 15 A breaker on an array with less than 11 amps short circuit current. It tripped intermittently maybe 4 or 5 times over a year, so we swapped it out. Perhaps they had a bad batch?<div>I was going to test it at the shop, but didn't have a chance yet.<br><div><br><div> <span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div>Solarray.com<span class="Apple-tab-span" style="white-space:pre"></span></div><div>NABCEP # 04170442<span class="Apple-tab-span" style="white-space:pre"><span class="Apple-style-span" style="white-space: pre; "> </span></span></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span> </div><br><div><div>On Jul 27, 2009, at 6:04 PM, Kent Osterberg wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"> Allan,<br> <br> I've had trouble with breakers opening when they shouldn't. On an array of two strings of Mitsubishi 175s (Isc = 7.9A) I had two 15-A breakers open. Last week, I had a low-power call from a customer with three strings of Evergreen 190s (Isc = 7.1A); one 15-A breaker in the combiner was open. Most of my installs are around 3000 ft elevation, so the irradiance is possibly a little higher than normal, but not by enough that it should be an issue for 15-amp breakers. If this is a wide-spread problem, I'd expect others on this list to have noticed.<br> <br> As others have mentioned, it is important to take precautions to make sure that stranded wires are well tightened in these breakers. I tighten, wiggle, re-tighten, and then check again later. On systems where I've had breakers open, loose connections haven't been the issue.<br> <br> Kent Osterberg<br> Blue Mountain Solar, Inc.<br> <a href="http://www.bluemoutainsolar.com/">www.bluemoutainsolar.com</a><br> <br> <br> Allan Sindelar wrote: <blockquote cite="mid:000f01ca0e7c$35346440$6401a8c0@pelapallan" type="cite"> <pre wrap="">I have had no problems to date, Kent. Can you be more specific as to what
problems you have had?
Allan Sindelar
<a class="moz-txt-link-abbreviated" href="mailto:Allan@positiveenergysolar.com">Allan@positiveenergysolar.com</a>
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
<a class="moz-txt-link-abbreviated" href="http://www.positiveenergysolar.com">www.positiveenergysolar.com</a>
-----Original Message-----
Is it just me, or have other wrenches had problems with the CBI circuit
breakers used in the Outback or Midnite combiner boxes?
Kent Osterberg
Blue Mountain Solar, Inc.
<a class="moz-txt-link-freetext" href="http://www.bluemountainsolar.com/">http://www.bluemountainsolar.com/</a>
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