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POWER FAILURE IN EAST ANGLIA

CliveS
What happened?   Why did the grid cascade trip and not isolate the immediate network?  Natgrid is NOT responsible for failure of British rail or hospital emergency supplies and MUST NOT fiddle the protection around trying to keep key areas/cities railways on!! 

Just shed the immediate area in this case Norfolk and Suffolk.  We do not need an expensive legal inquiry or someone to blame;  just reset the protection and shed the nearest area to the fault.  Sorry for the RANT.
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    What exactly had to be reset on the trains has not been specified but I suspect that it may be to do with the train protection system that links to the signals. These are often designed to stop the driver being able to override them. For example in normal service if a driver exceeds a speed limit or passes a signal the train is bought to a full stop before the system can be reset. If the trackside and the train systems both lost power there may be a need for resynchronisation.


    Best regards


    Roger
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  • 0
    What exactly had to be reset on the trains has not been specified but I suspect that it may be to do with the train protection system that links to the signals. These are often designed to stop the driver being able to override them. For example in normal service if a driver exceeds a speed limit or passes a signal the train is bought to a full stop before the system can be reset. If the trackside and the train systems both lost power there may be a need for resynchronisation.


    Best regards


    Roger
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