Re: Fate of 85/86 class

[John MacCallum <johnmac@lisp.com.au>]

> 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