[GTALUG] mysterious restarts

[Russell Reiter]

> So while technically possible to incrase voltage in the future, I
> highly doubt it will happen.

I don't doubt it at all. I don't understand not taking advantage of the
pantographic ability to carry higher voltage; that is its primary feature.

That would be like buying a Porsche and detuning the turbo, just doesn't
follow common sense.

On the other hand, for future capacity planning while load balancing the
polyphase AC grid we draw that energy from, the advantage of inverting to
higher DC voltage under higher demand, does make sense.

At least in the past the subway shared
> some substations with the streetcar network and hence they had to be
> the same 600V, although that probably isn't being done anymore.
>
> Still, upgrading the substations to a new voltage is not cheap and you
> have the issue of how to schedule the upgrades in segments so that you
> don't get different voltages connected together.
>
> Leaving the voltage as it is, means the existing equipment can stay with
> the new wires, and old trolleypoll cars can still be run on the system,
> at least until the day they get rid of the intersection equipment
> needed by the trolleypoles (which they appear to plan to do, to reduce
> maintenance costs).
>
> --
> Len Sorensen
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