08-02-2011, 03:15 PM
(08-02-2011, 01:27 AM)Saraswathi Wrote: Hi,
Q1) Can anyone explain the types of point machines used on the main line and underground of UK, when & why?
Q2) Occassions where we use trailable, non-trailable and High thrust point machines?
Q3) What is the difference between Facing Point Lock (FPL) and Ground Lock (GL) and when do we adopt them?
The "WHY" in Q1 is explained on the mainline in Network Rail's document NR/SP/SIG/19809 "Point Operating Equipment" which sets out their policy for selection of different types of machine. This information might not be a lot of use to you if you do not have access to NR standards and I am unable to post it as NR not not make their standards publically available. Although I have access to it via my company's login to the technical index website, one of the terms of use is that I do not make standards available to others.