Re: [Insert other state here] Airport lines

["James C" <jamesccj@optusnet.com.au>]

Would Hillside trains better off order some of these for Alanmein line ??
and Bayside for Willamstown line? or even for Upfield service.

Smaller train would be cheaper to operate empty 3 carriage shuttle set.

Cheers
James



Daivd R <spillNOspSPAM@cyberdude.com.invalid> wrote in message
news:387f17ac.60fc9fcd@usw-ex0104-032.remarq.com...
> It shouldn't be any more difficult than the normal voltage
> change-overs on the heavy rail network. As long as the
> electrical system is designed to operate at the highest voltage,
> then there's no reason why there would be problems. Thats
> speaking as an electrical engineer rather than knowing exactly
> how things work in this case.
>
> An example system would be to have two seperate power systems
> and a simple automatic switch. The initial state of the switch
> is neutral. When a voltage is applied, the controller determines
> which level and sets the switch. When the voltage is
> disconnected, the system resets to neutral and the process
> starts again. If a suitably long insulated section were used
> between high and low voltages (to give time for the controller
> to reset), then you have a cheap solution. The DC/AC changeover
> would cause more problems that the voltage change over as it
> means you need to be able to switch a transformer in and out of
> the circuit.
>
>
>
>
> In article <3930d847.36784517@news.ocean.com.au>,
> pcc@ocean.com.au (Brown Family) wrote:
> >On Sat, 27 May 2000 20:03:22 +1000, Colin Weaver
> ><weaver@powerup.com.au> wrote:
> >
> >>Feasible.  In Germany (Karlsruhe) there is light rail which
> shares
> >>infrastructure with high voltage AC heavy rail (25KV or
> ~16KV), and can
> >>also run under 750V DC.
> >>
> >How is this done?
> >
> >Unless you run 47 of them in series together (25KV), some form
> of
> >collection power attentuation must kick in pretty fast before
> you
> >savage the semiconductors. Even some form of PWM couldn't
> possibly
> >react fast enough.
> >
> >Les Brown
> >
> >Freedom's just another word for nothin' left to lose.
> >
> >
>
>
> * Sent from RemarQ http://www.remarq.com The Internet's Discussion Network
*
> The fastest and easiest way to search and participate in Usenet - Free!
>