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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><font size=4 color=black face=Calibri><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'>This will make it interesting to everybody with a grid tie inverter, can we open up the specs to let them work with the “new test variation”? The other option is that the inverters will spend a lot more time off line.<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'>Bob Ellison<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><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><font size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext;font-weight:bold'>From:</span></font></b><font size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> 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>Roy Butler<br><b><span style='font-weight:bold'>Sent:</span></b> Sunday, June 26, 2011 1:45 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] National grid hertz adjustment<o:p></o:p></span></font></p></div></div><p class=MsoNormal><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>I saw this as well, came over the AP news wire on Friday, June 24th.<br>I've been trying to figure out what they hope to gain by allowing more<br>frequency variation.....puzzling at best!<br><br><o:p></o:p></span></font></p><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Roy Butler<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>NABCEP Certified Solar PV Installer®<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>NYSERDA eligible PV & wind installer<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Four Winds Renewable Energy, LLC<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>8902 Route 46<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Arkport, NY 14807<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>607-324-9747<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a href="http://www.four-winds-energy.com">www.four-winds-energy.com</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Although no trees were killed in the sending of this message, <o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>a large number of electrons were terribly inconvenienced.<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre><p class=MsoNormal><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><br>On 6/26/2011 1:31 PM, North Texas Renewable Energy Inc wrote: <o:p></o:p></span></font></p><div><p class=byline><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>This article in the local paper sounds a little like potential trouble for grid connected inverters. I looked around on the NERC www site without finding the report mentioned. Any other wrenches seen anything about this experiment?</span></font><o:p></o:p></p><p class=byline><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>Jim Duncan</span></font><o:p></o:p></p><p class=byline><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif"'>By Seth Borenstein The Associated Press</span></font><o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>WASHINGTON -- A yearlong experiment with the nation's electric grid could mess up traffic lights, security systems and some computers -- and make plug-in clocks and appliances like programmable coffee makers run up to 20 minutes fast.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>"A lot of people are going to have things break, and they're not going to know why," said Demetrios Matsakis, head of the time service department at the U.S. Naval Observatory, one of two official timekeeping agencies in the federal government.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Since 1930, electric clocks have kept time based on the rate of the electrical current that powers them. If the current slips off its usual rate, clocks run a little fast or slow.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Power companies now take steps to correct it, keeping the frequency of the current as precise as possible.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The North American Electric Reliability Corp., which oversees the U.S. power grid, is proposing an experiment that would allow more frequency variation without corrections, according to a June 14 company presentation obtained by The Associated Press.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The test is tentatively set to start in mid-July.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tweaking the power grid's frequency is expensive and takes a lot of effort, said Joe McClelland, head of electric reliability for the Federal Energy Regulatory Commission.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>"Is anyone using the grid to keep track of time?" McClelland said. "Let's see if anyone complains if we eliminate it."<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>No one is quite sure what will be affected. This won't change the clocks in cellphones, GPS or even on computers.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>But wall clocks and those on ovens and coffee makers -- anything that flashes "12:00" when it loses power -- may be a bit off every second, and that error can grow with time.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>VCRs or DVRs that get their time from cable systems or the Internet probably won't be affected, but those with clocks tied to the electric current will be off a bit, Matsakis said.<o:p></o:p></span></font></p><p><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>According to the June presentation, East Coast clocks may run up to 20 minutes fast over a year, but West Coast clocks are only likely to be off by eight minutes. In Texas, it's only an expected speedup of two minutes. <o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color=black face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><br>Read more: <a href="http://www.star-telegram.com/2011/06/24/3178359/test-of-electric-grid-could-be.html#ixzz1QOzHwezw"><font color="#003399"><span style='color:#003399'>http://www.star-telegram.com/2011/06/24/3178359/test-of-electric-grid-could-be.html#ixzz1QOzHwezw</span></font></a><o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color="#1f497d" face=Calibri><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span></font><o:p></o:p></p></blockquote><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>List sponsored by Home Power magazine<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Options & settings:<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>List rules & etiquette:<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Check out participant bios:<o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><o:p></o:p></span></font></pre><pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><div class=MsoNormal align=center style='text-align:center'><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'><hr size=1 width="100%" noshade style='color:#ACA899' align=center></span></font></div><p class=avgcert><font size=3 color=black face="Times New Roman"><span style='font-size:12.0pt'>No virus found in this message.<br>Checked by AVG - <a href="http://www.avg.com">www.avg.com</a><br>Version: 10.0.1388 / Virus Database: 1513/3728 - Release Date: 06/26/11<o:p></o:p></span></font></p></div><hr noshade="noshade" size="1"><a></a><p class="avgcert" align="left" color="#000000">No virus found in this message.<br>
Checked by AVG - <a href='http://www.avg.com'>www.avg.com</a><br>
Version: 10.0.1388 / Virus Database: 1513/3728 - Release Date: 06/26/11</p></body></html>