my question？
 

hi every one:
I want to fiand a web station about traction power supply technology.especially,overhead contact system (ocs) and subway ocs.
I am a teacher in a railway college.I want to know more knowledge about world Electric railway.
who can tell me ？ thinks！:confused: :)

Hello again Peng,
The basics of Electric Traction Power Supply can be found here:
http://www.railway-technical.com/etracp.shtml

think very much！but i want to find a professional Electric Traction Power Supply web.:D ;)

Try this company: http://www.balfourbeatty.com/bbeatty...es/rail/power/
Cheers from Dario

And here's the website of another company who specialise in electrified railways. They have provided equipment for the railways in Hong Kong.:)
http://www.brecknell-willis.co.uk/

In Switzerland there is also
http://www.furrerfrey.ch/en/index.html