T-240 circuit problem [RE-wrenches]

[Matt Tritt]

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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