Re: Fate of 85/86 class

[david <david@nmit.vic.edu.au>]

What brought their ( the 86's )return ??? A shortage of locos, ?????????

Regards,
David Head

John MacCallum wrote:

> > For Electric hauled coalies coming down the Blue Mtns from Katoomba to
> > Emu Plains are just about continuously regeneratively braking,ie putting back
> > power into the overhead , does RAC pay freightcorp a credit for this
> > electricity.
> > I betcha not.
> >
> > On a similar vein,do 25KV /AC locos regenerate power back into the overhead
> > and if so how is it done?
> >
> > Thanks
> > MD
> When the concrete sleepers were laid back in the early 90's the
> up and the down overhead on the mountains was separated electrically.
> The effect of this was that it removed the ability to put power back
> into the overhead for a train coming up the hill. 86 and 85 class
> engines put their output in Regen back through internal resistors so
> that very little excess current flows in the overhead.
> Any over voltage of the overhead is dissipated by resistors at the
> substations.
>
> By the way I'm working 4 x 86 this morning on BB02. Should be out of
> Lithgow about mid day.
> --
>
> Pope
>
> Alias   John MacCallum