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<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Who was
the inverter manufacturer? Please respond off list, I just had to ask.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>I would
have sent it off list but it came as a bounced message.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Thanks,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=4 color=black face=Calibri><span
style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>Bob<o:p></o:p></span></font></p>
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style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:"Tahoma","sans-serif";font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Kurt Albershardt<br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, May 16, 2010 6:14 PM<br>
<b><span style='font-weight:bold'>To:</span></b> RE-wrenches<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [RE-wrenches] AC
breakers used in DC applications<o:p></o:p></span></font></p>
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12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Voltage is not the issue here, it is current, and battery fault
currents can be staggering - far more than one would ever encounter in a
typical AC system fed from a distribution transformer. I have seen a 200A
Class T fail to act on an 48V inverter fault which resulted in welding the
metal tabs of the fuse holder (which had been greased with copper-laden Penetrox
E) to their sockets. That indicates a fault current well north of 200,000
amps, quite possibly sseveral times that. A fire ensued, which triggered
the gas protection system and fortunately resulted in almost no peripheral
damage. It did cost about $10k to recharge and recertify the Inergen
system. The inverter manufacturer was quite cagey on warranty replacement
until they saw the photos - at which point a replacement miraculously arrived
by overnight air.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On May 15, 2010, at 9:43 , Drake Chamberlin wrote:<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>I did see a QO breaker
fail to trip on a 24 volt DC system with only battery voltage behind it.
It burned a #12 wire completely in two. <br>
<br>
<br>
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>The 48v is a max rating not a nominal rating.<br>
So yes only good for 12 and 24v systems.<br>
<br>
However with CBI breakers I don't understand why the need for QO for DC
anymore?<br>
<br>
jay<br>
<br>
peltz power<br>
On May 15, 2010, at 6:28 AM, Rebekah Hren wrote:<o:p></o:p></span></font></p>
<p><font size=3 color=blue face="Times New Roman"><span style='font-size:12.0pt;
color:blue'>Drake Chamberlin<br>
Athens Electric<br>
OH License 44810<br>
CO License 3773<br>
NABCEP </span></font><font size=1 color=blue><span style='font-size:7.5pt;
color:blue'>TM </span></font><font color=blue><span style='color:blue'>Certified
PV Installer <br>
Office - 740-448-7328<br>
Mobile - 740-856-9648 </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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