New microsoft power point presentation
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Interlocking is a system that coordinates railway signals and switches (points) to prevent unsafe situations like train collisions. Mechanically operated interlocking schemes connect levers controlling signals and switches so their positions are literally "interlocked," preventing conflicting operations like allowing two trains on the same section of track. For instance, obtaining a key for a route's switches prevents clearing another conflicting route. Interlocking coordinates signal box or cabin control of a region to ensure safe train movements.
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![Mechanically operated interlocking
• The most prevalent systems today [2003]
are still mechanical interlocking schemes
that coordinate the positions of the levers
controlling the points with the signals
governing that section of track and
connected branches, loops, or sidings.](https://image.slidesharecdn.com/newmicrosoftpowerpointpresentation-140412143224-phpapp01/85/New-microsoft-power-point-presentation-3-320.jpg)
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New microsoft power point presentation
- 2. What Is 'interlocking'? • In order to ensure that the signalling system never provides unsafe (conflicting) signals and the points are not set for more than one train that might end up proceeding on to the same section of track and hence suffering a collision, various schemes have been developed to coordinate the settings of the points and the signals within the region controlled by a signal box or signal cabin.
- 3. Mechanically operated interlocking • The most prevalent systems today [2003] are still mechanical interlocking schemes that coordinate the positions of the levers controlling the points with the signals governing that section of track and connected branches, loops, or sidings.
- 4. • For instance, in one common scheme, a key that allows setting the points for a route has to be obtained from the block instrument, and as long as the key is removed the instrument cannot be set to provide Line Clear for a conflicting route. • The wires that operate signals, and the rods that control points, are all interconnected in the lever frames at the signal cabins so that they are literally 'interlocked' -- the position of one lever or key physically obstructs the movements of other levers and keys which control points or signals that can be set in conflicting ways.