🚀 go-pugleaf

On Mon, 27 Mar 2006 19:45:08 +0100 someone who may be David M
<david@bogus.domain.dom> wrote this:-

>I see work is now proceeding apace on the new north-side through
>platform at Edinburgh Waverley station, with a substantial amount of
>track relaid and work well underway on the platform foundations.

It also provides one of the very few places in the UK one can see a
new scissors crossover installed. It must have cost a few pennies.

>they've still got
>the job of moving several of the overhead line masts (for platform 1/19) 
>out of the way which are currently planted right where the new platform 
>track needs to go; perhaps not the best foresight at the time of the 
>original station electrification..

This is not new. The former four track section of line in Hillington
Industrial Estate in Glasgow was reduced to two tracks with the
masts planted where the other tracks used to be. It is now an
obstacle to introducing a service to Paisley (Glasgow) Airport.

>Also while looking around, I noticed that the existing overhead line is
>*really* rather close underneath the footbridge from Waverley Steps, it
>looks there's a gap of only about 20 - 30 cm. I hadn't realised there
>was 25 kV /quite/ so close underneath my feet previously..

Since the 1950s a lot of work has been done on acceptable
clearances. As well as the static clearances there are dynamic
clearances to consider, when the line is displaced upwards by the
pantograph and parts of the pantograph pass close to things. 

Although they seem very small they are adequate and you may see the
same sort of clearances in a number of places. Anyone on the
platform at Berwick may like to look at the way the overhead is
placed under part of the canopy in one location, with little
clearance.


-- 
  David Hansen, Edinburgh 
 I will *always* explain revoked encryption keys, unless RIP prevents me
 http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54