Re: Brief trip report MEL-CBR-MEL and thoughts on 737 vs A320 cabins.

[Erwan David <Erwan.David@teaser.fr>]

>>>>> "JM" == JF Mezei <jfmezei.spamnot@videotron.ca> writes:

JM> Erwan David wrote:
>> It is the same power system (25 kV 50Hz) than on half french
>> lines. However its not the same signaling system and contraints on
>> the track are harder.

JM> Sorry. But the first TGV line (Paris Lyons), each locomotive was
JM> equipped with 2 pantographs and power systems. One for the high
JM> speed lines, and the other for the traditional lines. And during
JM> the switch-over from one to the other, it was evident inside the
JM> train because there was a period where there was only minimal
JM> power (no air conditioning etc, just lights).

        No. Classical lines are either 1500 V CC or 25 kV 50 Hz,
depending on when they where electrified. Paris-Lyon was one of the
firts electrified line, so it is 1500 V CC. However, every electric
lines in northern France are 25 kV 50 Hz. ANd the first TGV ran under
25 kV catenary, eg. in Grenoble, or between Marseilles and Nice (all
on classical lines).

JM> Also, the Eurostar is also equipped with dual power systems
JM> because the british railways between Folkestone and London provide
JM> power on different voltage (as well as providing it on a third
JM> rail instead of overhead wires.

Eurostar is 3 or 4 current : 3000 V CC for Belgium, 750 V CC thrid
rail for Kent and 25 kV 50 Hz for high speed lines and london
approach. Some are also 1500 V CC for the Alps (Bourg-St Maurice) in
winter.


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