[GTALUG] mysterious restarts

[Russell Reiter]

<snip>
at the same time), then they would be able
> to keep the old wires since higher voltage reduces the need for higher

All the current infrastructure is EOL this is why it is being changed.

> current to provide the same power.  Of course swapping all that out at
> once is not an option, so the voltage is not changing.  So instead if you
> want more power capacity, you need more current which means thicker wires.
> Conviniently that can be done area by area.
>
> The wires are of course also being updated to work with the pantograph
> system, which means fixing all the intersections and curves, and
> eventually making the straight sections move side to side a bit rather
> than being completely straight (which apparently wears a nice groove
> into pantographs).  After all the plan apparently is that only the first
> 60 or so of the new streetcars will have trolley poles, while the rest
> will only have a pantograph (the first 60 have both).

>From Wikipedia bit on transport pantograph

"Pantographs with overhead wires are now the dominant form of current
collection for modern electric trains because, although more fragile than a
third-rail system, they allow the use of higher voltages."

>
> --
> Len Sorensen
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