Ear plugs?
William Miller Miller Solar.com 805-438-5600 www.millersolar.com On Thu, Jan 23, 2025 at 7:44 PM John Blittersdorf via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > The only thing I could find in the whole system that was not up to snuff > was incomplete separation of neutrals and grounds in the sub-panel. In > other words more than one ground to neutral bond. But the fact remains that > this > system worked flawlessly for 26 years! I also removed the ground wire > from the transformer but still no difference. What am I missing? > > On Thu, Jan 23, 2025 at 10:35 PM John Blittersdorf < > john.blittersd...@gmail.com> wrote: > >> Steve, I took my scope meter today and checked wave forms at all >> points. All were clean sine waves. I checked the breaker connections and >> all connections back to the inverter and all were tight. >> Voltage drop when pump kicked on was small and only about 1 volt when >> running. Amp were 12 on both legs. >> >> On Thu, Jan 23, 2025 at 9:48 AM Jay via RE-wrenches < >> re-wrenches@lists.re-wrenches.org> wrote: >> >>> Are the amps leg the same? >>> Jay >>> >>> On Jan 22, 2025, at 9:29 PM, Steve Higgins via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>> >>> How do their clocks run? Is the Xfmer quiet down when the generator >>> runs? >>> >>> If you have an O-scope, check the output waveform off the inverter. My >>> guess is that the output waveform will be deformed, causing extra noise for >>> the Xfmer. You might be able to see this on the frequency as well. It >>> should be solid at 60Hz, but if it's drifting or way off the high side, >>> FETS have probably failed. >>> >>> If you pull the top cover off the inverter the and you look at the FET >>> board, it'll be the fets closest to the Fan on the AC board. >>> >>> >>> <image.png> >>> >>> Steve Higgins >>> >>> >>> >>> >>> On Wed, Jan 22, 2025 at 7:32 PM John Blittersdorf via RE-wrenches < >>> re-wrenches@lists.re-wrenches.org> wrote: >>> >>>> Christopher, >>>> Update on the Transformer Humming. Installed a new PSX-240 from Kirk >>>> and it is LOUDER than the T-240 that I took out. >>>> I have a call into the well driller to see if they have a record of the >>>> pump size or other details. When connected >>>> directly to the grid via transfer switch, still loud noise... same with >>>> battery only. I did not check the 120VAC 30 amp break >>>> in the backed up loads sub panel. All other wiring was redone as I >>>> switched the pump directly to the grid until I received the >>>> new transformer and back to the inverter again. so all the connections >>>> were redone except the 120 breaker. >>>> >>>> John >>>> >>>> >>>> On Wed, Jan 22, 2025 at 10:30 AM Howie Michaelson via RE-wrenches < >>>> re-wrenches@lists.re-wrenches.org> wrote: >>>> >>>>> John, >>>>> If you need a T240 (internal or external), I have a few used ones (and >>>>> maybe a new one) in storage. >>>>> Howie >>>>> >>>>> >>>>> On Wed, Jan 22, 2025, 10:14 AM Christopher Warfel via RE-wrenches < >>>>> re-wrenches@lists.re-wrenches.org> wrote: >>>>> >>>>>> I could be a loose electrical or mechanical connection. It's been >>>>>> installed for a while and connections could have loosened up from >>>>>> expansion and contraction. >>>>>> >>>>>> On 1/18/2025 9:06 AM, John Blittersdorf via RE-wrenches wrote: >>>>>> > Hi Wrenches, >>>>>> > I have a customer with an SW4024 installed in 2003 with the Trace >>>>>> > T220 transformer for >>>>>> > her well pump. Recently it has started making a lot of noise when >>>>>> the >>>>>> > well pump comes on. >>>>>> > I checked the current on the well pump and it seems to be in the >>>>>> > normal range. I have never had a transformer failure. Could this >>>>>> be a >>>>>> > failing transformer? >>>>>> > >>>>>> > Also, I have not been able to source a new one (Outback T240). Are >>>>>> > there other brands >>>>>> > some of you may have used for a step up transformer? >>>>>> > >>>>>> > John Blittersdorf >>>>>> > >>>>>> > _______________________________________________ >>>>>> > List sponsored by Redwood Alliance >>>>>> > >>>>>> > Pay optional member dues here: http://re-wrenches.org >>>>>> > >>>>>> > List Address: RE-wrenches@lists.re-wrenches.org >>>>>> > >>>>>> > Change listserver email address & settings: >>>>>> > >>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>>>> > >>>>>> > There are two list archives for searching. When one doesn't work, >>>>>> try the other: >>>>>> > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ >>>>>> > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >>>>>> > >>>>>> > List rules & etiquette: >>>>>> > http://www.re-wrenches.org/etiquette.htm >>>>>> > >>>>>> > Check out or update participant bios: >>>>>> > http://www.members.re-wrenches.org >>>>>> > >>>>>> -- >>>>>> Christopher Warfel, PE >>>>>> ENTECH Engineering, Inc. >>>>>> PO Box 871, Block Island, RI 02807 >>>>>> (401) 447-5773 >>>>>> >>>>>> _______________________________________________ >>>>>> List sponsored by Redwood Alliance >>>>>> >>>>>> Pay optional member dues here: http://re-wrenches.org >>>>>> >>>>>> List Address: RE-wrenches@lists.re-wrenches.org >>>>>> >>>>>> Change listserver email address & settings: >>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >>>>>> >>>>>> There are two list archives for searching. 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