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
>>>>>> >
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>>>>>> --
>>>>>> Christopher Warfel, PE
>>>>>> ENTECH Engineering, Inc.
>>>>>> PO Box 871, Block Island, RI 02807
>>>>>> (401) 447-5773
>>>>>>
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