[RE-wrenches] irrigation and direct solar

[Darryl Thayer]

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.  


DT




________________________________
From: "toddcory at finestplanet.com" <toddcory at finestplanet.com>
To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
Sent: Sun, April 17, 2011 2:38:31 PM
Subject: Re: [RE-wrenches] irrigation and direct solar

How about looking into a more efficient pump first?
 
Todd
 
 
 
On Saturday, April 16, 2011 8:00pm, "Darryl Thayer" <daryl_solar at yahoo.com> 
said:


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?
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.
DT



________________________________
From: "allsolar at scswifi.net" <allsolar at scswifi.net>
To: re-wrenches at lists.re-wrenches.org
Sent: Sat, April 16, 2011 9:29:47 PM
Subject: [RE-wrenches] (no subject)

Wrenches,

I have been contacted by an irrigation company who would like to explore
options of remote irrigation systems.

He tells me they need 480vac 3 phase at 40A.

Is that even possible?  I did not believe it would be.

Jeremy
ALL SOLAR INC.

_______________________________________________
List sponsored by Home Power magazine

List Address: RE-wrenches at lists.re-wrenches.org

Options & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org

List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org

List rules & etiquette:
www.re-wrenches.org/etiquette.htm

Check out participant bios:
www.members.re-wrenches.org
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20110417/f7692953/attachment-0004.html>