<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>I have not studied this but many people use speed drives to improve the efficiency of pumps, also a Drive I like is teh ABB and it can use the DC bus voltage to control drive speed increasing the capability, with caveats. </DIV>
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<DIV>DT<BR></DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> "toddcory@finestplanet.com" <toddcory@finestplanet.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> RE-wrenches <re-wrenches@lists.re-wrenches.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Sun, April 17, 2011 2:38:31 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [RE-wrenches] irrigation and direct solar<BR></FONT><BR><FONT size=4 face=arial>
<P>How about looking into a more efficient pump first?</P>
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<P>Todd</P>
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<P>On Saturday, April 16, 2011 8:00pm, "Darryl Thayer" <daryl_solar@yahoo.com> said:<BR><BR></P>
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<DIV>That is 480 x 1.73 x40 A x.8 or 26 kW in the peak of the day, five or 6 big trackers, or about 50 kW of fixed array. ( I assure they want 40 amp breaker?</DIV>
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<DIV>I have run 3 phase speed drives from solar array directly into the DC Bus of the speed drive. But it is best if it has a gen support. No need to invert just DC from array to speed drive and generator is auto loaded. If the solar can take the entire load, the gen does no work.</DIV>
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<STRONG><SPAN style="FONT-WEIGHT: bold">From:</SPAN></STRONG> "allsolar@scswifi.net" <allsolar@scswifi.net><BR><STRONG><SPAN style="FONT-WEIGHT: bold">To:</SPAN></STRONG> re-wrenches@lists.re-wrenches.org<BR><STRONG><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></STRONG> Sat, April 16, 2011 9:29:47 PM<BR><STRONG><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></STRONG> [RE-wrenches] (no subject)<BR></SPAN><BR>Wrenches,<BR><BR>I have been contacted by an irrigation company who would like to explore<BR>options of remote irrigation systems.<BR><BR>He tells me they need 480vac 3 phase at 40A.<BR><BR>Is that even possible? I did not believe it would be.<BR><BR>Jeremy<BR>ALL SOLAR INC.<BR><BR>_______________________________________________<BR>List sponsored by Home Power magazine<BR><BR>List Address: <A href="mailto:RE-wrenches@lists.re-wrenches.org" rel=nofollow target=_blank
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