Hi Kurt, A very good idea.
Do you know how much more efficient the 3 phase is vs the single? Thanks, jay peltz power On Jun 24, 2010, at 10:41 AM, Kurt Albershardt wrote: > Once you determine the real pump requirements (as others have mentioned, this > is critical - IME particularly if the "well guy" sized and sold the pump) and > if a larger than SQflex pump is needed, I have had good luck using VFDs to > drive three-phase pumps with single phase power. You can pay Franklin the > big $$ for their system, but a commodity VFD from someone like Automation > Direct will set you back about $100/HP and (up to 3 HP) will accept single > phase input power. This gets you sophisticated motor protection, > programmable ramp soft starts, restart delays, and a plethora of input and > output terminals for shutdown switches, PID sensor inputs, etc. and will > allow you to create all manner of interesting system behavior. Most also > include a (software programmable) runtime limitation or alarm which can > prevent scenarios like Chris described below. 3-phase motors are more > efficient anyway so I seriously doubt we will sell a traditional single phase > pump or fan again. > > > > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@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
