<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Even though the CBs may be more convenient, I'd opt for the Class T fuses because they are current limiting whereas CBs are generally not. In a direct short, the inrush current is huge. The T fuse will clamp that for a brief time and then blow. That works in your favor for heavy motor starting surges as well. I agree with Ray about the Boltswitch products. Well built and hell for stout.<div>Bob-O</div><div><br><div><div>On Apr 8, 2013, at 7:13 AM, Ray Walters wrote:</div><br class="Apple-interchange-newline">
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<div class="moz-cite-prefix">I know you said that you would prefer
breakers, but I've used Boltswitch pullout disconnects with class
T fuses on many systems. In the past 15 years, I've only blown 1
class T fuse, and they do offer better circuit protection. Here's
a PDF of some class T rated fused switches that are rated from 200
amp to 1200 amp DC. See the series T models.<br>
<pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
On 4/8/2013 7:57 AM, William Dorsett wrote:<br>
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<div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Have
you tried Eaton/Heinemann breakers? Old number is (410)
546-9778. They’ve had some jumbo breakers that Trace used to
use on their battery disconnects.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bill
Dorsett<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Manhattan,
KS<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<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"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<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>Troy Harvey<br>
<b>Sent:</b> Sunday, April 07, 2013 9:39 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:Allan@positiveenergysolar.com">Allan@positiveenergysolar.com</a>; RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Fuse sizing in battery
circuits<o:p></o:p></span></p>
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</div><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal">Allan,<o:p></o:p></p>
<div><p class="MsoNormal"><o:p> </o:p></p>
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<div><p class="MsoNormal">that is a good graph. Thanks. The time vs
current is way different than whst I've seen from fuse
charts in the past.<o:p></o:p></p>
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<div><p class="MsoNormal"><o:p> </o:p></p>
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<div><p class="MsoNormal">I'd rather use DC-breakers, but I'm
having trouble finding 350AMP DC breakers for 350MCM cable.
Any resources?<o:p></o:p></p>
</div>
<div><p class="MsoNormal"><o:p> </o:p></p>
<div>
<div><p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:6.5pt;color:black">thanks,<br>
<br>
Troy Harvey<br>
---------------------<br>
Principal Engineer<br>
Heliocentric<br>
801-453-9434<br>
<a moz-do-not-send="true" href="mailto:taharvey@heliocentric.org">taharvey@heliocentric.org</a><br>
<br>
</span><span style="color:black"><o:p></o:p></span></p>
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