Allan, Yeah. If I could talk him into a better pump (it's the money!) the whole issue would go away. Sort of. Like a lot of folks, they save their dough and pay for improvements piecemeal, and the pump is the last big hit (if they only knew!) being saved for.
Matt ---- Allan Sindelar <[email protected]> wrote: > Matt and boB, > This is only somewhat relevant, but may help: > A few days ago, on initial bootup of a new system with a Magnum MS4024AE, we > easily ran a 1HP submersible at nearly 500' head plus pressurizing (single > pump system). However, this was a Grundfos SQ, so the soft-start made it > much easier. Steady draw was about 88ADC at 25 VDC, or around 2200 watts. I > had cautioned the client that this combination wasn't certain to work, > although I expected that it would. > > Allan Sindelar > [email protected] > NABCEP Certified Photovoltaic Installer > EE98J Journeyman Electrician > Positive Energy, Inc. > 3201 Calle Marie > Santa Fe, New Mexico 87507 > 505 424-1112 > www.positiveenergysolar.com > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of boB Gudgel > Sent: Thursday, July 30, 2009 4:45 PM > To: Matt > Cc: RE-wrenches > Subject: Re: [RE-wrenches] Power Factor > > Matt wrote: > > Possibly a PF question, or maybe one for Magnum - boB, > > > > One of the guys at work is (almost) running a 3/4 hp sub pump with a Magna > AE 48. Or rather, he isn't. According to him when he first fired it up, it > operated the pump just fine. The next time he tried, though. he couldn't > even get a buzz out of the starter. No workee. > > > Sounds kind of like a "pump is broken or worn out" problem, doesn't it ? > > If there is enough ac voltage applied to the pump, the it should do > ~something~, or lights should dim or some > kind of sign should show itself, wouldn't you think ? Otherwise, I > would suspect it might be a surge problem. > > Is there a pilot light or something ? Maybe a fuse blew or breaker > tripped somewhere ? (when the pump went off?) > > Doesn't sound like a PF problem though... However, since you mention > it, with loads that are not a 1.0 power factor, > at least for displacement power factor, when reactive phase shift is > involved, the inverter must be able to "sink" current > from the stored reactive energy as well as be a source to the motor. > The Magnum does that just fine, as does any other > decent inverter. > > Maybe Tony, Eldon or Gary at Magnum has seen this before ? 425-353-8833 > > boB > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > 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 > _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] 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
