Substation spacing - 3rd rail - Article 39 - go-pugleaf

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Substation spacing - 3rd rail

#39

From: David Winter
Date: Mon, 09 Sep 2002 16:09

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With 3rd rail systems, what is the spacing between substation (ie range of
one substation).

This will vary with system and load.

My question is looking at 3 min frequency, 6-car full size single deck
trains, with a 750v nominal supply with either medium (+/- 100v) or wide
tolerance (+/- 200v).

I know there's some well versed electrical engineering types who lurk
hereabouts - so some indicative figures would be helpful noting that each
situation requires its own assessment.

Also, what's the range of nominal voltages used with guarded types of side
contact 3rd rail systems (eg Docklands). I know that 1200v DC was used near
Manchester - has any system been implemented with higher DC or AC voltages
in a 3rd rail supply?

Regards

David Winter
Armadale,
Western Australia

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Subject: Substation spacing - 3rd rail
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