ABSTRACT
Management System EB Emergency Brake ETCS European Train Control System EVC European Vital Computer MTBF Mean operating Time Between
Failures MTBSF Mean operating Time Between
Service (System) Failures MTTR Mean Time To Restoration/
Recovery RBD Reliability Block Diagram SA-NBS Signalling and Automation
Systems on New Swiss High Speed Line (Mattstetten-Rothrist)
SBB AG Schweizerische Bundesbahnen AG (Swiss Federal Railway company)
λ Failure rate μ Restoration/recovery (repair)
rate
2 SPURIOUS EMERGENCY BRAKE (EB) APPLICATION
There are some small differences in the applications of ALSTOM’s ATC trainborne sub-system by different projects. But in all of them the ATC trainborne subsystem spuriously applies the EB if at least one the following events occurs:
• at least one of the two emergency brakes voters is spuriously opened in the EVC section;
• at least 2-out-of-3 (2oo3) EVC channels are faulty, and then inhibited;
• the transmission eurobalise sub-system fails; • the connection to the train (backplane) fails; and/or • the odometry sub-system functionality fails.
