Difference between route setting type and nonroute setting type. This is made possible by the interlocking, a relay electronics or computer system which controls signals, turnouts, detectors, and other equipment, to ensure that only safe movements will be allowed. Difference between route setting type and non route setting type. The railway signalling domain is a safety critical domain, where safety is given utmost importance. Dec, 2019 entranceexit interlocking nx was the original brand name of the first generation relay based centralized traffic control ctc interlocking system introduced in 1936 by grs represented in europe by metropolitanvickers. Grs manufactured the first allrelay interlocking system in 1929. Modelling and verification of relay interlocking systems. Verification of a safetycritical railway interlocking system.
Replaced the term reserved route with the correct term locked route. The route relay interlocking technology is the universal basis of all interlocking principles and control tables, such that this course is valuable even if the delegate is not intending to work on rri technology. Report of a comparative analysis of the interlocking systems. Route relay interlocking installations are available on every major yard of indian railways for efficient and safe movement of trains.
It creates a synergic relationship between equipment such as signals and points to ensure the safe route of the train. Siemens in 25 kv ac electrified areas is approved as a temporary in single rail dc track circuits to alength of 450 mts. In such interlocking systems, the various routes and switches outside a station are physically connected together so that setting one route through the station automatically disables all other routes. External components such as points and signals were now controlled by relays instead of wire pulls. Towards a framework for modelling and verification of. The part of the interlocking system that prevented trains. Mar 10, 2015 principles of railway interlocking is a huge and hard topic. Mohan, irsse, csteconscrly functions routes previous rri new rri main signals 106 186 calling on signals 59 183 shunt signals 259 335 slots to other cabins 10 32 total 434 736. I investigate how the verification of railway interlocking systems can be. Report of a comparative analysis of the interlocking systems executive summary signaling is the keystone of the railway transportation system and besides it, the interlocking system acts a central role granting the key issues such safety of the overall system. Trains run between points of the rail network, moving from section to section along exclusively allocated routes and crossing roads.
Ac lamp proving relay for route indicator with interposing current transformer tuecr. The goal of this project is to develop a formal method for verifying that such systems guarantee the safety of trains. So we may use and make any kind of interlocking circuits for any purpose very easily. Interlocking equipmentrailway signaling solutionsproducts. Pdf modelling of track layout for intelligent railway signalling. It is explained how to derive a state transition system model for the dynamic behaviour of a relay system from such diagrams. The design of a train station includes the creation of. What is route relay interlocking system in indian railways. Interlocking systems are used for ensuring the safety of trains. Route relay interlocking the conditions of track circuit and various indications of all signal are mirrored on the panel that carries the diagram of the yard. Jun 20, 2018 using tfms in the signalbox in this way provide a failsafe way of getting such safety override controls to the interlocking without relying on the control screen system. Principles of railway interlocking is a huge and hard topic.
Sep 04, 2019 railway salient features of relay based interlocking. Major point relay groups are used in this system minor point relay groups are used in non route setting type. In british system the relays confirming to brs and bss specification, having metal to carbon contacts are used, q series relays. Dosto is video mein railway ke interlocking system ke baare me bataya gaya hai interlocking system kya hai aur wo kaam kaise karta hai sab kuch jaane ke liye video ko pura dekhiye agar achha lagta. Development of electrical and electronic systems found interlocking moving toward relay solutions that became. Verification of a safetycritical railway interlocking. This paper describes how relay interlocking systems as used by the danish railways can be formally modelled and verified. The idea is that two trains must never drive on two conflicting i. In this,entire route through the station can be selected and all the associated points and signals along the route can be set at once by a switch for receiving, holding, blocking, or dispatching trains. Such systems are documented by circuit diagrams describing their static layout. May 26, 2016 many processes need to follow a logic to achieve a set of objectives without any conflicts and hazardous situations for the safety of equipment, humans, and environment. They include signaling plan, route section plan, table of control, wiring diagrams and contact analysis. Automated railway signalling and interlocking system. An interlocking system when builtcompletely using electro mechanical relays iscalled as route relay interlocking system.
Ei is a computer based electronic interlocking system, used for controlling points, signals, level crossing gates etc, through a centralized control panel or through vdu, like existing relay based mechanical interlocking systems. Modelling interlocking systems for railway stations. There are different types of route relay interlocking and naming and exact use do vary. Introduction signalling is the device by which the movement of trains is controlled highly important in terms of safety trains can be operated efficiently, utilization of tracks and tracks can be done at maximum levels signalling includes signals, points, blocks and other equipment. In the present age of information technology, the relay based technology is slowly being phased out and replaced with ssis, but there are operational issues with computer based interlocking systems. This facility is purpose built for training, illustrating a wide range of signalling and implementation principles.
Verification of a safetycritical railway interlocking system with realtime constraints. Pdf analysis of railway interlocking systems sandeep. This system consists of complex circuits with a large number of various relays and their nomenclature. In railway signalling, an interlocking ixl is a system composed by a set of signal apparatus that prevents trains from conflicting movements through only allowing trains to receive authority to proceed, when routes have been set, lock and detected in safe combinations. Many processes need to follow a logic to achieve a set of objectives without any conflicts and hazardous situations for the safety of equipment, humans, and environment. The danish railways use a route based approach to interlocking. The are different types of interlocking systems available like cabin interlocking system mechanical interlocking, panel interlocking system pi, route relay.
Towards a framework for modelling and verification of relay. In this project, an automatabased railway signalling and interlocking system is introduced with a railway. To satisfy the safety standards set for railwaysignalling systems, the interlocking software design must be taken into account, using formal methods. Route relay interlocking rri is the system used in large and busy stations that have to handle high volumes of train movements. Aug 01, 2018 dosto es video me railway k solid state interlocking system k bare me bataya gya hai janane k liye video ko pura dekhiye achha lage to like kijiye share kijiye. What is solid state interlocking system in railway youtube. Entranceexit interlocking nx was the original brand name of the first generation relaybased centralized traffic control ctc interlocking system introduced in 1936 by grs represented in europe by metropolitanvickers. These arrangements are termed automatic interlockings, and the approach of a train sets its own route automatically, provided no conflicting movements are in progress. The only difference of siemens route relay interlocking with respect to siemens panel interlocking is that it has the additional facility to set the points on the route, overlap and isolation automatically when a route is initiated. This master thesis is made in cooperation with banedanmark and deals with relay based interlocking systems for railway stations. Entranceexit interlocking nx was the original brand name of the first generation relay based centralized traffic control ctc interlocking system introduced in 1936 by grs represented in europe by metropolitanvickers. The present indian railway signalling system is equipped. Commissioning of route relay interlocking rri vijayawadascr a success story sri ch. Specifying railway interlocking requirements for practical use.
Relay interlocking is a system of implementing principles of interlocking for safe train operations at a station with the help of electrical circuits wired through electromagnetic relay contacts and coils. The relay based interlocking systems are documented by the station documentation, which is a collection of diagrams of the layout of the track side equipment, the electrical circuitry and the train route table. The interlocking system is a mix of the mechanical interlocking system and the relay interlocking system see section 2. The railway signalling domain is mostly operated using traditional technology, which is considered safe and time proven. Its a type of electrically operated interlocking like panel interlocking pi is the system used in most mediumsized stations on ir. Electro mechanic interlocking systems were implemented in the railway network from around 1915 until 1950. The route relay interlocking technology is the universal basis of all interlocking principles and control tables, such that this course is valuable even if. To enhance our route relay interlocking courses, we have a purposebuilt route relay interlocking with entrance exit panel and full simulation of trackside equipment. Jul 19, 2015 its a type of electrically operated interlocking like panel interlocking pi is the system used in most mediumsized stations on ir. Microprocessor or micro controllers are used in eis. A computerbased interlocking system cis is a kind of safetycritical system widely applied in the signalling industry today. However the aspect for automatic signals on plain line is usually determined by relays located in a cabinet next to the signal, and unless the signal has a button on the panel for emergency replacement the only communication. The advent of all electric interlocking technology allowed for more automated route setting procedures as opposed to having an operator line each part of the route manually. Grs manufactured the first all relay interlocking system in 1929.
The relay logic is always used to describe the interlocking logic in. Prototypes of such tools have already been developed. Route relay interlocking system is one of the important signalling systems for major yards in indian railways. Railway signaling solutions interlocking equipment interlocking equipment controls the route of trains and vehicles within stations or at depots to ensure safe movement.
All the required drawings of a twoline station with siemens route relay interlocking system are given in this book. To maintain this system one should at least have a basic knowledge about the system, its. This master thesis is made in cooperation with banedanmark and deals with relaybased interlocking systems for railway stations. Route relay interlocking rri is the system used in large and busy stations to handle high volumes of train movements. Route relay interlockingrri is the system used in large and busy stations to handle high volumes of train movements. Spg 07 signalling control systems transport for nsw. Interactive question bank on route relay interlocking. In this,entire route through the station can be selected and all the associated points and signals along the route can be set at once by a switch for. Railway salient features of relay based interlocking.
Railway interlocking process buidling a base for formal. Pdf analysis of railway interlocking systems sandeep patalay. Restoration of system is quick after fault localization. Analysis of relay interlocking systems via smtbased. Advanced signalling system with panel interlockingroute relay interlocking electronic interlocking pirriei along with multi aspect colour light signals have been progressively provided at 5,584 stations covering about 88% of the interlocked broad gauge stations on indian railways, replacing the obsolete multi cabin mechanical signalling. Indian railways are having time tested experience in relay interlocking since 1958. Lots of circuits similar to this interlocking circuit are used in industries. Download as ppt, pdf, txt or read online from scribd. A guinness book of world records holder for largest route relay interlocking kumar had spent nearly four decades in the indian railways before being embroiled in this alleged corruption scam. Interlocking equipment controls the route of trains and vehicles within stations or at depots to ensure safe movement. Certainly the usr route stick relay is a route locking element that would normally be energized but would drop when a route is set to reserves the track section in the direction needed for that route and impose locking on directly and indirectly opposing routes as well as any points contained within that track section. Where a computer based interlocking system is used the system shall. Automated railway signalling and interlocking system design.
Dosto es video me railway k solid state interlocking system k bare me bataya gya hai janane k liye video ko pura dekhiye achha lage to like kijiye share kijiye. Report of a comparative analysis of the interlocking. Commissioning of route relay interlocking rri vijayawadascr. Once a route is set and a train is given a signal to proceed over that route, all switches and other movable. Once the route is set to allow, the portion gets illuminated with. In railway signalling, an interlocking is an arrangement of signal apparatus that prevents. Rail signalling systems went toward eliminating human factor by introducing machine based decision making on whether to proceed or stop. The route relay interlocking system is the widely used system. The advent of all electric interlocking technology allowed for more automated route setting procedures as opposed to. For big and major yards where traffic is considerably more, setting of route by individual operation of points is time consuming as well as sometimes confusing and causes unnecessary delay. The circuit interlocking depends on the nature of working and task which is to be done by motors. The basic knowledge of this system can help the signal personnel in maintenance and troubleshooting of the installation under their jurisdiction. Certainly the usr route stick relay is a route locking element that would normally be energized but would drop when a route is set to reserves the track section in the direction needed for that route and impose locking on directly and indirectly opposing. By looking at these indications a panel operator can a panel operator can easily know whether a track is free or not.
Route relay interlocking how is route relay interlocking abbreviated. What is rrirri stands for route relay interlocking. Development of electrical and electronic systems found interlocking moving. Notes on relay interlocking iriset relay railway safety. The existing capacity can only be increased by upgrading the signaling system.
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