Re: Overhead power lines

["Wizzer" <wizzer1865@optusnet.com.au>]

Ronald BESDANSKY <ronbest@bigpond.com> wrote in message
25Wk4.2561$VJ1.5015@newsfeeds.bigpond.com">news:25Wk4.2561$VJ1.5015@newsfeeds.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

Actually, it was Liverpool to Campbelltown that had the first double contact
wire.:-)


> 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.?"
> >
> >
> >
> >
>
>