Could it be current rail isolation switches...https://www.youtube.com/watch?v=xumonIs52Lk forward to 10 mins
This could definitely be a possibility, although without more context from programmes1 it really is hard to be sure. As the video shows, inside the cabinets are knife switches which I suppose could be reasonably referred to as levers. However, their 'common' name across the combine is a 'section switch'.
A sight slowly disappearing from the railway - particularly on the sub-surface lines at the moment - as motorised replacements are installed, better equipped to deal with the traction current voltage increase.
Incidentally, that's one of my 'favourite' training videos... a shame it doesn't get shown in classes any more! They don't make them like they used to...
Last Edit: Aug 27, 2017 14:41:50 GMT by MoreToJack
The points are only secured as the mechanical locking of the levers prevents movement they are not physically secured outside
Indeed! In my aim to keep things simple I perhaps over-simplified.
For completeness it's also worth mentioning that in some areas that aren't controlled by a local Cabin a variation on 'King' working can be implemented - auto-through working. It effectively does exactly the same thing by operating all the signals automatically by the passage of trains, locking out (better phrase...!) any points and crossings and removing control from the signalling centre.
Last Edit: Aug 27, 2017 14:53:07 GMT by MoreToJack