T-240 circuit problem [RE-wrenches]

[Ray Walters]

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Hi All;

Ample water storage  is a good idea; pumping it into the house and thinking 
its potable is NOT. I would recommend a sealed system for water supply to 
the house and a  cistern (rain catch possibly) with a pressure pump to a 
yard hydrant for fire protection and gardening. I've seen most cistern 
systems fail water quality tests due to coliform type bacteria. Unless you 
want to start chlorinating the cistern regularly, I'd look at the sealed 
system only.
Not to be a lawyer, but the liability of customers contracting Giardia 
isn't worth it.

Ray Walters
Taos Power, SolarRay

At 04:06 PM 8/30/2003 -0700, you wrote:
>Bob-O et al,
>
>It's good to know that the SQ will work with inverters. Maybe I need to
>change my AC pump supplier. I don't see the reason to run a pressurizing sub
>pump - sans water tank though. If you live outside the distributed water
>supply, you'd have to be slightly out of yer gourd NOT to have a nice, big
>holding tank, a 4" supply to (at least) one hydrant, and a booster pump for
>other purposes, unless there's a good fall from the tank. This is like
>running an off-grid house with four T-105's and hoping that the power input
>never goes off!
>
>Matt T
>
>  Message -----
>From: "Bob-O Schultze, Electron Connection" <econnect at snowcrest.net>
>To: <RE-wrenches at topica.com>
>Sent: Saturday, August 30, 2003 3:07 PM
>Subject: Re: T-240 circuit problem [RE-wrenches]
>
>
> > Matt, Dave, etal,
> > I've got a few SQE pumps running on sine wave inverters with no
> > worries both in 120V (now discontinued, I think) and 240V through a
> > T240.  I did, however, have one bummer SQE which worked out of the
> > box but poorly. More poorly on the inverter than the genny. Dontcha
> > hate that? Grundfos gave my supplier credit for it eventually, but it
> > was a hassle with me having to buy a second pump to get the client
> > back in water. I was very unimpressed by the glacial speed at which
> > Grundfos dealt with the problem.
> > Best, Bob-O
> >
> > >Dave,
> > >
> > >As I remember, the SQ is a variable speed, constant pressure pump, which
> > >includes an inverter within the pump itself. They might be trying to run
>an
> > >inverter with another inverter - a function which is highly improbable,
>if
> > >not impossible. (This according to Hays Pump who also make a similar type
>of
> > >pump I was interested in powering with a 4048 a few years ago)
> > >
> > >This pump will run great on generator power or grid, but not on inverter
> > >power.
> > >
> > >Matt T
> > >
> > >
> > >----- Original Message -----
> > >From: "David Palumbo, Independent Power & Light" <ipl at sover.net>
> > >To: "Wrenches" <RE-wrenches at topica.com>
> > >Sent: Saturday, August 30, 2003 8:54 AM
> > >Subject: T-240 circuit problem [RE-wrenches]
> > >
> > >
> > >>  A customer reports the following:
> > >>
> > >>  240v water pump operating off of OutBack FX2024 inverter by way of a
>Trace
> > >>  T-240 (we specked Trace because T-240 comes with box and customer did
>not
> > >>  have OutBack AC box on his system) making loud "grinding noises" while
> > >>  attempting to power the water pump. The pump is a Grundfos SQ sub pump
> > >>  pumping into a standard pressure tank setup. FX inverter appears to be
> > >>  operating fine as he reports no problems with other loads.
> > >>
> > >>  TriMetric system monitor showed current going from normal 45 amps dc
>at
> > >24v
> > >>  up to 90 amps during this episode. He reported that these numbers were
> > >>  jumping back and forth violently and the TriMetric meter actually
>re-set
> > >>  itself to 100% at this time.
> > >>
> > >>  I told him to check all his connections etc. He said he had already
>done
> > >>  that. I had him then disconnect the pump feed wire from the T-240 and
> > >>  connect the pump directly to his 240v generator output. He called back
> > >later
> > >>  to report that he tried this and the water pump worked fine directly
>from
> > >>  the generator.
> > >>
> > >>  He has had the T-240 working in his system since early spring with
>good
> > >>  performance until now.
> > >>  The circuit is as follows: FX2024 > 120vac load ctr > 15A breaker >
> > >pressure
> > >>  switch > T-240 T-former > 240v Grundfos SQ sub pump.
> > >>
> > >>  Do Transformers go bad? Or what else might cause this problem?
> > >>
> > >>  Thanks,
> > >  > Dave
> >
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>
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