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69
RATO 6 / 05-2012
6.3.5.2 Releasing a main route
A set main route must be released automatically as the track sections on the route
become occupied and vacant according to the occupancy sequence of the route.
The signal included in the main route must be controlled to display a 'Stop' aspect
before lockings of the route are released.
The route locking of a main route track section must be released, when the track section
in question and the previous track section have become occupied and vacant and the
track section following has become occupied according to the occupancy sequence
corresponding with the main route direction. The route locking of a main route track
section may not be released, if the first one of consecutive track sections becomes
vacant before the latter track section becomes occupied.
The route locking of the track sections of the track in rear of the main route exit signal or
the track section ending a main route must be released when the track section in
question becomes occupied and the route locking of the previous track section is
released, if the track section is not associated with other lockable signalling elements
controlled by the interlocking system. The route locking of the track in rear of the route
exit signal or the track section ending a main route must be released when the track
section in question becomes occupied and vacant, the following track section becomes
occupied and the route locking of the previous track section is released, if the track
section is associated with other lockable signalling elements controlled by the
interlocking system.
The point locking on the route or overlap must be released when the locking of the point
track section is released. The flank protection locking of the point providing route flank
protection must be released when the locking of the track section, which the point is
providing flank protection for, becomes released.
The releasing of the main route must also function reliably when a short and fast train is
using the main route.
A break in the interlocking power supply must not cause the unintentional release of the
main route.
6.3.5.3 Cancelling a main route
It must be possible to cancel a part of a set main route, if main route setting is
interrupted and the main route entry signal is not controlled to display an aspect
permitting driving.
A set main route can be cancelled if the track sections on the signal approach zone that
have a route or routes set up to the route entry signal of the main route about to be
cancelled are vacant (Figure 6.3:19).
①
②
Signal approach zone, where track sections must be vacant
① Set main routes ② Main route about to be cancelled