Re: Overhead power lines

["Ronald BESDANSKY" <ronbest@bigpond.com>]

The older parts of the system use a single "contact wire". The newer parts,
beginning, I think, with the Eastern Suburbs line, use two, to spread out
the contact area with the pantograph, and/or improve the behaviour of the
overhead by having two thin wires instead of one thicker one. You will
notice that the catenary over the Blue Mountains uses two CATENARY wires, to
improve the current-carrying capacity on the steeply-graded section.

--
Rgds

Ron BESDANSKY
Lourie Smit <lsmit@ozemail.com.au> wrote in message
nLRk4.14117$3b6.59308@ozemail.com.au">news:nLRk4.14117$3b6.59308@ozemail.com.au...
> The following question appeared on the Australia Transport Discussion
Board
> (English Version). As there do not appear to be too many railway people
> looking at that, I thought I would repeat it here. It was posted by Andrew
> on Saturday 29/1/2000.
>
> "Why do some parts of the cityrail network have only one wire touching the
> pantograph on the train and some parts have two.?"
>
>
>
>