T-240 circuit problem [RE-wrenches]

[Matt Tritt]

Maybe 13's a charm? We've never had a problem powering standard sub's with
inverters, but like I said, were advised against inverter to inverter
connections by the manufacturer of a similar type pump. They were concerned
about "locking" between the two units since both use an "artificial"
sinewave. I could be they were wrong about his, but they said warranty would
be void if we did it.

Matt T
----- Original Message ----- 
From: "David Palumbo, Independent Power & Light" <ipl at sover.net>
To: <RE-wrenches at topica.com>
Sent: Saturday, August 30, 2003 10:38 AM
Subject: RE: T-240 circuit problem [RE-wrenches]


> Matt,
> We have run over a dozen Grundfos SQ sub pumps with mod sine as wll as
sine
> wave inverters with no problems.
> DP
>
> <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>
>
>
>
> > 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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