Re: SLR - Extension construction

[Ben Armstrong <ba13@uow.edu.au>]

On 25 May 2000, Matthew Geier wrote:

>  Ill try and get a closer look at the extension trolley wire and work out its
> diameter and then lookup the voltage drop characteristics for copper wire of
> that diameter. That will be a best case, the trolley wire will be alloyed to
> make it harder and less ductile, and that will have a adverse affect on the
> conductivity.

I think that the contact has a significantly higher mv/A.m figure than
ordinary copper wire of the same cross-section. I can't remember the
name of the wire above the contact (feeder/caternary?) in the 1500v
system, but that is the cable you would be wanting to look at for
voltage drop. Mid-span feeders may have to be taken into account as well
(smaller x-section)

AS3008 will tell you all... :-) 

Hope this helps,

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