[SML] Motors on UPSs

[Richard Niederberg]

...And I was under the impression that there was plenty of Ethanol in
Brazil, and presumably the Generators that run on it...
/s/ Richard

On Thu, Jan 15, 2015 at 6:37 PM, Michael Sauder via Stagecraft <
stagecraft at theatrical.net> wrote:

> I just wanted to clarify that I'm not looking to run on battery for
> extended periods of time. We worry about two scenarios:
>
> - Brownouts. The ride is about 4 minutes long. We'd like to be able to
> handle small brownouts without halting the ride. Either finishing the
> current show, unloading, and then wait out the brownout, or in the case of
> a severe brownout, have enough power to move to the unloading position
> (which is, of course, near the maximum height) without involving the
> generator. If my research today is right, an automatic tap transformer may
> address this issue, and allows us to operate continuously even during
> extended low-grade brownouts.
>
> - Dips or sags, in which the voltage drops to a seriously low voltage, but
> only for a short time (say, 1-5 seconds). This is the more serious concern,
> because it will stop the motors in the middle of a ride and requires a
> drive amp reset. Bad for the equipment, bad for the customer experience,
> especially if it's a frequent occurrence. Tentative research says that an
> automatic tap transformer will not address this issue, and this is where
> the big money will go.
>
> The wildcard is that we don't know how much of a problem any of this
> really will be. The recommendation I just made to the producers is to
> install an automatic tap transformer to start (we need a step-down
> transformer anyway, this is just a fancier version), a quality power
> monitoring solution so we can gather data and tie into the show controller
> (Medialon Manager), and designate infrastructure space where we can put in
> a $$$ power conditioning system in the future, if needed.
>
> Thanks again to everyone for their help, it has been extremely helpful.
>
> Michael S.
>
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-- 
/s/ Richard
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