Re: Forth Bridge painting programme

On 11 Aug, 10:35, David Hansen <SENDdavidNOhS...@xxxxxxxxxxxxxx>
wrote:
On Sat, 11 Aug 2007 00:37:10 +0100 someone who may be Charles Ellson
<char...@xxxxxxxxxxxxxxxxxx> wrote this:-

Perhaps a voltage-switching arrangement isn't so "daft" as
this is presumably what exists in Karlsruhe in the platform areas
where the trams change voltage.

Far better to have trams which can operate on various systems. It
can be done, in the 1970s "bad old" "backward" BR introduced trains
which could do just this and they are still running. IIRC these were
the first trains or trams in the world which could operate on low
voltage DC and high voltage AC (though with a pantograph and
shoegear rather than via one (or more) pantograph(s)). These days
the process is a lot easier due to developments in power
electronics.

Looks like the former Communications Director of the New Edinburgh
Tramways Company has missed the point, that point being that trams
would have to be dual voltage if any future electrification of the
ECML was to remain a possibility, unless some voltage switching
arrangement was made for the overhead on the bridge.

Unless main-line electrification took place first, trams would have to
have the 25kV option just in case.

.

Relevant Pages

  • Re: Forth Bridge painting programme
    ... where the trams change voltage. ... Far better to have trams which can operate on various systems. ... SNCF's long-standing plans for a sizeable fleet of tram-train cars ... Citadis Dualis will be available with three power combinations: ...
    (uk.railway)
  • Re: Forth Bridge painting programme
    ... this is presumably what exists in Karlsruhe in the platform areas ... where the trams change voltage. ... Far better to have trams which can operate on various systems. ...
    (uk.railway)
  • Re: Forth Bridge painting programme
    ... If there are sufficient paths to allow the trams to ... where the trams change voltage. ... voltage changeover is done automatically, ...
    (uk.railway)
  • Re: OT: Well done the Mancs
    ... reopenings and new tram systems in many regional centres. ... I agree with the rail electrification, ... Trams ... commuters than buses. ...
    (uk.rec.motorcycles)
  • Re: OT: Well done the Mancs
    ... electrification, a progressive programme of line and station ... need to take the Tram blinkers off though. ... Trams ... trams have significantly better takeup from car commuters than buses. ...
    (uk.rec.motorcycles)