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6 Cards in this Set
- Front
- Back
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If a sealed release is provided, you must only use if 2 reasons to use the sealed release... |
A lever working points or a facing point lock is locked by a failure of a track circuit Controlled level crossing barriers are locked down by failure of a track circuit or by the occupation of a track circuit by a failed train and you have the drivers confirmation that the train will not be moved without your authority |
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Before using a sealed release you must make sure 2 safety conditions |
It’s safe to do so The portion of line is clear and no movement is about to be made over it |
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Before operating a sealed release to raise level crossing Barriers you must make sure 2 safety reasons |
The protecting signals are at danger and their controls are at normal The auto raise switch (if provided) is in the manual position |
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Before you use a manual time release: 1 safety reason |
Make sure the line concerned is clear |
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You must only use a manual time release if .. 3 reasons to use manual time release |
Route must be changed after the junction signal has been cleared You can not restore a signal lever after the passage of a train because a track circuit or treadle has failed where backlocking is required You have to place the block indicator to “line clear” again after it has been placed in that position |
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Manual time releases To use to restore “line clear” 5 reasons |
Testing block instruments Testing a signal released by line clear Closing a signal box where the section signal is released by line clear A train being cancelled after being accepted A shunting movement having been completed |
