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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Matt,<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>They claim to use a bi-polar array with 600Vdc per pole. All
bipolar arrays must be grounded, so they must be grounded. They claim to be
grounded through the ac service transformer while operating. They are fundamentally
similar to many ungrounded designs. So, it IS grounded during operation every
time the transistor closes, which is very fast, so they don’t spend much
time ungrounded during operation—maybe never because they are operating
on 3 phases. The neutrals would have to be white.<o:p></o:p></span></p>
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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.<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
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<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"'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Matt
Lafferty<br>
<b>Sent:</b> Monday, May 03, 2010 1:28 PM<br>
<b>To:</b> RE Wrenches<br>
<b>Subject:</b> [RE-wrenches] AEI Solaron Inverters - DC Grounded or Ungrounded<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Wrenches,</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Can
anyone DEFINITIVELY tell me whether the DC systems on AEI
Solaron based plants is grounded or ungrounded during operation? </span><o:p></o:p></p>
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<p class=MsoNormal> <o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Have
you tested your theory in the field? What marking requirements do you suggest
for the neutrals?</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks!</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Matt
Lafferty</span><o:p></o:p></p>
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