Re: Overhead wires for LRT [wasOld Timer on Sydney Light Rail
Cam ("cam[NoSpam]"@progsoc.uts.edu.au)
Sat, 12 Jul 1997 23:41:53 +1300
David McLoughlin wrote:
>
> Phil Bertram wrote:
>
> Yes the overhead [for the new Sydney Australia LRT line] does appear
> to be for normal pantograph operation,
> > however what is different is that; double contact wire has been hung. I
> > am not sure of the reasoning for this maybe someone else can provide the
> > answer, it may have something to do with better pick up for the 750V dc
> > taction current. I have noted new overseas Light Rail systems also using
> > double contact wire as well.
>
> I would be interested to know why this is done, too. The new tramway
> system at Sheffield UK uses this kind of double-contact wire, as do some
> of the new French tramway systems, ie Rouen. The contact wire used seems
> thicker than the single wire used on most tramway systems. Some existing
> tramways seem to be converting to it -- ie I am looking at a photo of a
> tram on route 1 in Cologne in Germany and the overhead is of the double
> kind.
>
> Not all new systems use this kind of construction. The Tuen Mun system in
> Hong Kong's new territories uses ordinary single contact wire.
>
> Can any of the engineers among us elucidate?
umm maybe,
two smaller diameter wires side by side could provide a larger contact
patch
with the moving conductor than one single wire. I havent really had a
good look at the overheads to really know what I am talking about tho.
;)
--
Cam! -=DUH#3=- (Y1)
"Flames!, Who me officer ?, These tyres ?"