InterlockiNg System in Jaipur Metro

InterlockiNg System in Jaipur Metro.

What is Interlocking System?. This Photo by Unknown Author is licensed under CC BY-SA.

Basic functionality of Interlocking Systems. YARD.

Basic functional elements of Interlocking systems: Point Machines Signals Track Circuits.

Introduction: Interlocking operations. Route setting and locking – Field element Actuation.

Introduction: Interlocking operations. Route setting and locking – Route Checking.

Definition of Safe and Unsafe Failure modes. Assumption: – Non permissive actions leads to safe condition.

Control OUT off. Control To Equipment Output off Signal’s light Light switched off Point machine No power for moving.

Indication IN off. Indication From Equipment Input off Signal’s light No indication, Light off Point machine No indication for point position Panel pushbutton No indication.

CBI Interface to Yard Devices. Yard Element Actuation Control Indication.

CBI Interface to ATC Subsystem. Movement Authority Control Indication.

CBI Interface to Other IXL. Cross-related information (border) Control Indication.

IXL Interface to Diagnostic Subsystem. Diagnostic information maintenance requests system malfunctioning indication device ageing.

IXL Interface to Data Mgmt. Subsystem. Remote control Routing Information Route selection Train info.

IXL Operator Interface. Manual or emergency operations Control Indication.

IXL Interface to Other Vital subsystems. Yard element related subsystems Control Indication.

CBI Safety related communication. Closed Transmission Systems CENELEC 50159-1 Open Transmission Systems CENELEC 50159-2.

No specific assumption is made on transmission systems B o t h s a f e t y r e l a t e d a n d n o n s a f e t y r e l a t e d e q u i p m e n t can be connected to the same transmission system.

Transmission systems Architectures. Optic Fibre link.

Copper wire transmission systems. Local or Geographical connection schemes Various speed (slower in Geographical) Large equipment availability.

Optic Fibre Transmission systems. Local or Geographical connection schemes Unidirectional medium Highest speed.

Radio Transmission systems. Local or Geographical connection schemes Various speed Slow (GSM/R) Fast (Spread Spectrum) Great flexibility Coverage.

Transmission system shall be considered as non trusted S a f e c o m m u n i c a t i o n h a s t o b e g u a r a n t e e d b y s a f e t y protocol Detect Errors Initiate a safety reaction.

Transmission Systems: types of Error. Errors on message Transmitter identity error (Masquerade) Message type error (Insertion) Message data error (Corruption) Time errors Delay Error (Delay, Deletion) Sequencing Error (Repetition, Re-sequencing).

Transmission Systems: Error Countermeasures. Message sequencing Time Stamp Timeout Feedback information Source and destination Identification Message Identification (Open Transmission Systems) Safety code Cryptography (Open Transmission Systems).

CBI operation has to be considered in the appropriate environment Electromagnetic Environment (CENELEC EN50121) Electrical Environment (CENELEC EN50122 - EN50124) Climatic and geographic Environment (CENELEC EN50125.

CBI Systems: Electromagnetic Environment. Electro Magnetic Compatibility Susceptibility / Emission.

CBI Systems: Electrical Environment. Separation between CBI and yard potentials Operator protection against dangerous voltages.

CBI Systems: Climatic and geographic Environment.

S u b r o u t e. Locking of subroute The subroutes of a route are locked in sequence.

Origin route signal. Route to be released ,First track circuit clear, second track circuit occupied Origin route signal.

C o n t r o l T a b l e s. CONTROL TABLE – GENERALITIES Control Table is a formal tabulation of signal, point and other controls associated with an electrical or electronic signalling system CBI, showing the interlocking and other dependencies between those controls ..

C o n t r o l T a b l e s. Table 2 - Track Circuits- This table is made to determine the number of the receivers for each track circuit and if there is a DOT associated with it. Table 3 - Cycle Control- This table is made to determine all the conflicting conditions to set the cycle. Table 4- Maintenance Block- This table is made to determine which routes and cycles are associated to the maintenance block.

C o n t r o l T a b l e s. Table 5 -Control Route by individually control. This table is made to determine all the conflicting conditions to set the route. Table 6 -Control Route by Fleet Mode- This table is made to determine all the conflicting conditions to set the route in Fleet Mode. Table 7.1 -Control Route by Cycle - This table is made to determine all conditions to call the route when the cycle is set. Table 7.2- Route Blocking- This table is made to determine which cycles are associated to the routes to be blocked..

C o n t r o l T a b l e s. Table 7.3 –Virtual Route- This table is made to determine the conflicting routes for the routes received from the adjacent CBI. Table 8-Direction Of Travel “DOT” - This table is made to determine all the routes which control the DOT. Table 9 -Manual Authorisation Point- This table is made to determine the conditions required to remove the key from the key transmitter when the Point Manual Authorisation controlled. Table 10 -Point Locking- This table is made to determine all the conflicting conditions to move the points from Normal to Reverse and Reverse to Normal.

C o n t r o l T a b l e s. Table 11.1-Traffic Direction out of turnback zone- This table is made to determine all the conditions to set and release the Traffic Direction in non-turnback zones. Table 11.2-Traffic Direction in turnback zone- This table is made to determine all the conditions to set and release the Traffic Direction in turnback zones. Table 12 -Sub Route Locked- This table is made to determine all the Sub Routes which are locked by the routes. Table 13 -Sub Released- This table is made to determine all the conditions to release the Sub Route ..

C o n t r o l T a b l e s. Table 14.1 -Overlap Calling / Releasing- T h i s t a b l e i s m a d e t o de t e r m i n e al l t h e c on d i t i o n s to lo ck an d r el e a se the Overlap. Table 14.2 -Overlap Establishment- This table is made to determine all the conditions for overlap establishment. Table 15.1 -Main Signal Proceed Aspect. This table is made to determine all the conditions to clear the Main Signal to the proceed aspect. Table 15.1 –Shunt Signal Proceed Aspect. This table is made to determine all the conditions to clear the Shunt Signal to the proceed aspect..

C o n t r o l T a b l e s. Table 16-Route Released - This table is made to determine all the conditions to release the route. Table 17-Route Indicator- This table is made to determine all the conditions to lit the Route Indicator. Table 18 –Access Authorisation . This table is made to determine all the conditions to authorise a route from signalling zone to the non- signalling area. Table 19-Particulars Information sent to ATS - This table is made to determine some particular status variables to be transmitted by ASCV to ATS..

C o n t r o l T a b l e s. – Table 20.1 & 20.2 – Transmissions CBI CBI This table is made to determine the variables to be transmitted from one ASCV to the adjacent ASCV..

C o n t r o l T a b l e s. Table 21.1 & 21.2 – Reception from other CBI. This table is made to determine the variables to be received from the other ASCV. Table 22 – Current and Adjacent CBI Informations This table is made to determine some particular information to generate the Boolean Equation File. Table 23 – Buffer Stop This table is made to specify the Buffer Stop signals in the CBI controlled area..

Purpose Interlocking is a safety mechanism that ensures only one train operates over a particular section of the track at any time. How it works Interlocking uses a combination of signals, point mechanisms, and track circuits to prevent collisions and protect the movement of trains. Types of Interlocking Systems Route Relay Interlocking (RRI) and Panel Interlocking are the two main types of interlocking systems used in Jaipur Metro..

Architecture and Working of Interlocking. Point machines Signal Track cricuits.

Architecture and Working of Interlocking. Point Mechanism Points are the switching mechanisms that allow one train to move from one section to another..

point machine or switch machine. Point machines are responsible for controlling the movement of the railway switches or points, which allow trains to change tracks or move from one line to another. The point machine consists of an electrically or hydraulically operated mechanism that moves the points, ensuring they align correctly to guide the train onto the desired track. It is typically controlled remotely from the operations control center or by the train operator. Point machines play a crucial role in ensuring safe and efficient operations in metro systems by enabling the routing of trains along different tracks, allowing for flexibility in scheduling, maintenance, and emergencies..

Type of point mechine. Electric Point Machine : Electric point machines are widely used in modern railway systems. They are typically powered by electric motors or solenoids, which drive the movement of the points. Electric point machines are controlled remotely through the signaling system..

Type of point mechine. Hydraulic Point Machine : Hydraulic point machines utilize hydraulic power to operate the points. They often involve the use of hydraulic cylinders or actuators to move the points into the desired position. Hydraulic point machines are less common compared to electric ones..

Type of point mechine. Mechanical Point Machine : Mechanical point machines are older types of point machines that rely on mechanical linkages and levers to move the points manually. They are operated by a lever or a mechanical handle, usually by a railway worker. However, mechanical point machines are less prevalent today due to automation and advances in technology..

Architecture and Working of Interlocking. Signals Red, Green, and violet lights are used to regulate the movement of trains. It indicates whether a train should stop or proceed.

enterlocking signals in a metro system serve the following purposes:.

purposes. rain Movement Control : Interlocking signals govern the movement of trains by indicating whether a train is permitted to proceed, stop, or approach with caution. They provide visual indications to train operators about the status of the track ahead..