[PRCo] Re: Changing Track Switches

[TEP]

 Many systems, pantograph or pole, still use the old system, coast for
through, power for turn, at a contactor about 1 1/2 car's length ahead of
theswitch. All our 265 trolleybuses here still use this (plus the 1930
Selectric turn control), but to avoid the risk of applying power on a busy
street the operator has a toggle switch that dumps power through a contactor
into the traction resistors--just enough to trigger the overhead relay.
Toronto also still uses its unique system with a separate contact point on
the side of each trolley head--energised by the motorman as needed..
Tom P.

On 27/02/2011 17:29, Herb Brannon wrote: As we know, PRCo/PATransit PCC car
(using trolley poles) operators changed automatic track switches by using
the"Track Switch" control on the dash. Now with the PAT LRV cars (using
pantographs) the routes and switches are set by computer. This is also true
in Cleveland on the entire Red Line and the Green and Blue (former Shaker
Hgts Rapid) Lines as far East as E. 79th Station. After that its back to old
style manual control on the Shaker lines. Now, SEPTA still uses trolley
polesso the "Track Switch" on the operators console is probably still there
and is used. On the other hand, most systems now use pantographs. Like for
instance MUNI in San Francisco and I'm sure they have a lot of switches to
gothrough. My question is, how do the systems using pantograph current
collection change track switches? I know how it's done in Cleveland, but not
other places. Anyone know? 
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Tom Parkinson Tom Parkinson 2 64 2007-04-17T20:06:00Z 2007-04-17T20:06:00Z 1
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