Railway signalling Solid State Interlocking (SSI)

Railway signalling Solid State Interlocking (SSI)

Railway signalling Solid State Interlocking (SSI) SSI Information Flow Classification of SSI SSI can be classified on the basis of –Type of Redundancy used Dual HW Dual HW with 100% stdby TMR SW redundancy –Whether Object Controllers are provided or not –Type of Data Programming used – Free wire or Geographical Object Controllers   Types […]

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Coded Track Circuits | D.C. Coded Track Circuits

Coded Track Circuits • D.C. Relay Coded Track Circuits • Solid-State Coded Track Circuits – Electrocode – Microtrax D.C. Coded Track Circuits • Transmitter – Sends a coded D.C. voltage (Square Wave) • Receiver – Decodes signal • Dependent on the code rate, receiver will : – Pick the appropriate track relay repeater – Display […]

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Introduction to Centralized Traffic Control

Introduction to Centralized Traffic Control

Centralized Traffic Control  * Traffic control system (TCS) or centralized traffic control (CTC) is a block system under which train movements are authorized by block signals whose indications supersede the superiority of trains for both opposing and following movements on the same track. FRA 236.828 * Signal control – train movements are controlled by signal […]

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Metro Rail Absence of cab signaling, Failure of fixed Signals, Failure of route setting

Absence of cab signaling (1) Failure of the cab signaling shall initiate an irrevocable emergency brake application. (2) The Train Operator shall report the occurrence to the Traffic Controller and seek instructions. (3) The Traffic Controller shall verify as far as practicable from indications on his diagram that the problem is not caused by a […]

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Metro Rail Control of Signaling Safety Communication Running Lines

Metro Rail Control of Signaling | Safety Communication | Running Lines

(1) Control of Signaling :- (i) Main line signaling is controlled from an Operations Control Center and operates normally under automatic control with routes being set and train intervals regulated by computer control. (ii) Signaling system will permit more than one train at a time in one Tunnel Ventilation Section. This can be restricted to one […]

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Metro Rail Provision of Signals Working of Signals and points 

Metro Rail Provision of Signals – Working of Signals and points 

Metro Rail Provision of Signals (1) Fixed signals shall be provided on running lines at the approach to all points and crossings of interlocked areas and located in such a way that trains will stop at a safe distance from any fouling movement or location.   (2) All depot tracks and any other tracks not […]

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Configuration & Version Control Signalling Design 

Configuration & Version Control Signalling Design

Configuration & Version Control Signalling Design Presentation Title Block Design details should include an overall border of 5mm with a left hand binding margin of 40mm minimum, with an update block, production block and title block agreed by the records custodian bearing the information required by NR/L2/SIG/11201. A typical layout is shown in NR/L2/SIG/11201, Module A10, […]

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