Re: Overhead power lines

["Chris Downs" <cvdowns@ozemail.com.au>]

Assuming there is consistency to the replacement of overhead I would assume
that the use of a double contact wire is predominantly related to current
carrying capacity.

However, when the up main and up suburban were rewired between St Marys and
Westmead only a single contact wire was used in conjunction with a single
catenary wire!!!  This is a four track section however - are both up lines
connected electrically (unless specifically isolated) to increase current
carrying capacity?

Most other areas have been rewired with double contact wires or
alternatively a separate conductor adjacent to the overhead such as:
Penrith - St Marys
Loftus Bank
At least some of the city railway tracks between Central and the Goulburn St
portals.

Chris


The Railway Rasputin II. <bob@fastlink.com.au> wrote in message
38954134.CF90D41F@fastlink.com.au">news:38954134.CF90D41F@fastlink.com.au...
>
>
>
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> > True, if one contact wire breaks at least the train can still move:-)
> > >
> > > Brendan
>
> And if a wing falls off an aeroplane it can still fly?
>
> If one wire breaks, it will tangle up in the pans and bring the whole
> lot down.
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>
> rgds