John - A resistance test of each leg will show you the cable + windings that should be roughly 1 ohm, and they should be equal within .1 ohm. This will verify if the cable, splices and motor windings are OK. But, it won’t tell you if there is a mechanical issue. I may be able to help you directly, or else refer you to a solution. I’ll write to you off-list if you don’t mind.
As an aside, if I may put on my educator hat: The industry uses the term 3-phase to refer to conventional 3-ph AC pumps. Your helical rotor pump, we refer to as “brushless DC” or the better, but less common term “electronically commutated motor (ECM)”. It does use a form of 3-ph, via 3 wires, but we name it something more specific to distinguish it from the conventional AC. — Windy > On Sep 21, 2018, at 1:10 PM, re-wrenches-requ...@lists.re-wrenches.org wrote: > > From: John Blittersdorf <john.blittersd...@gmail.com > <mailto:john.blittersd...@gmail.com>> > Subject: Re: [RE-wrenches] High Volume Solar Pumping > Date: September 21, 2018 at 6:28:50 AM MDT > To: RE-wrenches <re-wrenches@lists.re-wrenches.org > <mailto:re-wrenches@lists.re-wrenches.org>> > > > Hi Windy, > I have a question about 3 phase pumps but slightly off topic for this > thread. I have a Lorentz pump I bought from you 18 years ago and is at 480 > feet and my well will only > give me 1 gpm with occasional air coming up . I replaced the control board 3 > years ago and it had been working fine. It quit a few months ago right when > we were getting into a drought here in Vermont. How can I be sure it is a > controller issue and not the pump itself. My spring has dried up and I am > now pumping from my other building and another spring 800' away using a > Shurflow 12v pump. It is not doing well. You mentioned a Lorentz > distributor which triggered me to jump in here. Is there a way to determine > if the pump is good with resistance test of each leg? Or leg to leg with > wires disconnected from controller? > > John Blittersdorf > CV Wind Service (and Solar)
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