PowerPoint Presentation

Signalling Internship23 December 2015

Sharing SegmentsLegacy Signalling SystemThales Signalling SystemGeneral Learning Experiences

Legacy Signalling System

Automatic Sub-SystemsAutomatic Train Operation (ATO)Automatic Train Protection (ATP)Automatic Train Supervision (ATS)Westinghouse Signalling SystemInterlockingOCC

Legacy System VisitsNight Work with YCK SMOSignal Equipment RoomsOCC ATS

Night Work (PM/CM)YCK Signal Maintenance Office (SMO)(4/12/15)

Dynamic Nature Of PlansMaintenance plans are never cast in stone. Can change at eleventh hour.CM supersedes PM.

AMK ATO Tripping1 December 2015 (1630)Could restart in CM

1 December 2015 (1704)Failed several times to restart in CMHad to RM to AMK SB

Approach

Check Relay RoomUsed the Track Circuit Monitoring Unit (TCMU) to check carrier frequency of track circuit.Checked relays.Pull out then replace speed code pins.

No anomalies

Check Track Circuit WiringChecked for any loose connections between tuning unit and rails.

No anomalies

Check ATP Loop Feed Cable/DBOnly applicable to N700 SRTC Codes are send through LFU instead of the track circuit itself.Checked LFU and DB connections

No anomalies

Inconclusive OutcomeNo leads to find the true reason for ATO trip.Problem could now lie in train-borne equipment (antenna? Processors?)Typical experiences for maintenance crew.Justifies the difficulty of their job.

Signal Equipment RoomsAMK, MSL, RDH, CT, East Relay Room

Platform-ATO Communicator

Dwell Time At Station

Platform ATO Communicator (PAC)Train SendsPositive Train Identification (PTI)Train Door StatusPAC SendsDetailed track profile for next 2 interstation runsDoor Close commandPSD Status

OCCVictoria St

Environment

Legacy ATS System

Schedule CompilerLPUOCCAllocation TableIL/SLPULPUI/SIL/SIL/SI/SI/SI/SI/SI/S

IL/S Interlocking StationI/S Intermediate Station

Legacy Schedule Compiler

Compiles Weekday, Weekend and Special Schedules.Must define track layout and station stopping positions.Conflicts must be resolved manually.Revisions are done as and when needed.Demand-driven schedule formulation

Dwell Time ProblemsReal Life Problems with ATS and ATO

Dwell Time ProblemsPSDs cannot close properly.Train-borne ATO or PAC may not be communicating door status properly to the train.

Dwell Time Problems

https://youtu.be/Bg1LYEQF4TU

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ConsequencesTrain timings deviates from schedule.Peak hour schedules that barely passed schedule feasibility checks will now be unfeasible.Increase likelihood of schedule conflicts due to delayed trains.

Potential SolutionsPSD Health Monitoring SystemMonitoring times when PAC didnt receive or send the Door Open/Close signal properly.

Thales CBTC System

Automatic Sub-Systems

ATOAutomatic Train Supervision (ATS)Thales CBTC SystemInterlockingOCCTrain-BornePMIMAUZone ControllerATPATOATPVOBC

Thales CBTC System VisitsQUE WRU PICOCBTC Train Testing

Installation ProceduresSignal LightPrelimPICO DBInstall/Cut-InPICO everythingSATOther EquipmentInstallPICOCut-InSAT

QUE WRU PICOWB Trackside

QUE WRU PICOCheck out the conditions of the wayside WRUs. Casing and circuitry.Check earthing of equipmentUsed Cable Tester (VSWR) (AP broadcasting) and Spectral Analyser (power supply)

Overall ExperienceWorking in imminent rain conditions.Extreme care towards WRU setup.WRU ponding issue due to condensation.Breather valve.

Static and Dynamic TestingKHI 097/098

Static Test

Check if the correct outcomes happen when controls are set in a certain way.Copy and paste the command code into computer which connects to VOBC.

Dynamic TestTest the trains performance in various driving modes.Test the 2 VOBCs ability to control train in DTO.Test the stopping accuracy.

Overall ExperienceFirst time experiencing the new ATO system.It is teamwork to test trains.

General Learning ExperiencesFirst Internship

Learning ExperiencesSystem Management and MaintenanceKeeping records of the days proceedingsBetter picture of my future role in rail industry.

Internship ExperienceInsightful and fulfillingFree and easy exploring nature.

Thank You