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 al...@positiveenergysolar.com 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: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] 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: 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
