Sent from mobile. On Jun 14, 2016 4:01 PM, "Lennart Sorensen" <lsorense@csclub.uwaterloo.ca> wrote:
On Tue, Jun 14, 2016 at 02:58:49PM -0400, Russell Reiter via talk wrote:
You don't think that the TTC might be forward planning for 750V all
around?
Remember it was TTC staff I spoke to who told me the change was to accommodate higher voltage.
Well according to the published documents, the change is to handle higher current, not a change in voltage. Also the changes are to make
Where does it say more amps and not more volts? I'm going by what the guys doing the work told me. I mean it is possible they were wrong but it is just as possible the documentation you refer to is wrong. Maybe they are going to increase voltage and current together. Line by line as the new equipment is deployed. However staff did say the new cars operate on a higher voltage. They can't be wrong about that, it's their job to know these things.
the system pantograph friendly since they want to switch entirely to that.
The new line with 750V will be double ended trains, just as the subway trains are, unlike the streetcars running on the existing network.
Changing the voltage is just a huge hassle since you have to do a flag day, where every streetcar and transformer and any associated gear is all simultaniously swapped out. That's painful, and the slight current drop by going to 750V is unlikely to be worth it, especially since they won't be sharing trains with the new line anyhow. Since they had to upgrade the overhead wire anyhow for pantographs, going to a bigger wire gauge is much simpler than trying to do a swap out of a bunch of other equipment that can't be done in stages.
-- Len Sorensen