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Th-e_Cbief Sirylf

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All Indian Railwap.

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"by 'TVorking Sub: Draft Chapter on Electronic Interlocking - Recommeuded Group for inclusion in &e SEM Part-II under Chapter nil (B)' ,

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With the approrral of Board (ML), a ,Workiq.g Grory,($I€) review of IRSEM Part-I aadPart-tr.

was formed ts have .

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A.fter discussion in 82odSSC meetine and CSTEs' Conference,Working Croup fl$mitba a draft Chapter on Electronic Interlocking for inclusion in the SEMP$W, Chapter)O0(Blforimplementdion on.Railways %,.,.*_.".'

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Copyfprwarded for iaformation andnecels* ;ffi%, 1. 2, 3. 4. 5. 6. 7. 8.

The Chief OperationsMan4gers,AIl Indian Railwa5lslu"' The Chief Elestrical tr-nginee$,All TnilianReilu@ys. The Cbief Mechanio4[F.ngrne6ps,,q#hlndian Railwffi. ThePrincipal Chief Engineers,All InfuRailways. The Chief SafefyOff.cers,All rndinnR.@ryap The Chief Commissionerof@ SafetyrT,ucknow A11Commissionersof Railgay Saf@l' TheDjrectorcenerqLRail%r.S tlege,Vadodarai$r.Ilstifrse of Transporl Managemeat,tvlanak Nagar, iii:lltl!:lr Lucknow.

10.TheDirector,Iqd,iqnRaiisbysInstituteof AdvancedTrackTechnology Pr:ng. Engrneer, 11.The Director,.-,{,flffi RailwaysInstifirte of Mechanicaland Electical Eagineering, {,1.11 li\i.!:X!

.tr . jgl Jamalpru. . i2. The bir""tor, Indian Railways Institute of Sig'lat Eagineering aad Telecom, Secrindwabrid. 13.The anRailwaysInstifi$e of Elechical EngineeringNasikRoad.. l 14,Ibe PridCipals,Zonal Railway Training Institutes, Central Railway, Bhusawal,Eastern Railway, Bhuli, Northem Railway, Chandarui,.North Eastem Railway, Muzaffarprr, Nortbeast Frontier Railway, Aliprrdrur, North Western Railwan Udaipilr, Southem Tkailway, Tinrchirapalli, SorrthCentralRailway, MaulaAl't SER/ Sini. \td. tte GeneralSecretarv.NFIR 3 ChelmsfordRoad-New Delhi.

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NATIONALFEDERATIONOFINDIANRAILWAYMEN(N.F.I.R,) -.3, ChelmsfordRoadrNewDelhi.

4/Pt.9

Dated:25/10/2013

Copyforwarded to the Generi{secretaries of Zonal (}nions of NFIRfor information. C/- Media Centre/NFIR. C/-I V/Co-ordination (Committee)/S&T/ I 0.

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(M.Raghavaiah) General

GHAPTERXXI INTERLOCKTNG RELAYAND ELECTRONIC B.

(El) INTERLOCKING ELECTRONTC

21.19

GENERALREQUIREMENTS

21.19.1

Electronic Interlocking System shall be approved type ild conformto latestapprovedspecification.

21.19.2

Eiectronic lnterlockingSystem shall be suitable for workirg grl Electrifiedand non electrifledsections.

21.19.3

ElectronicInterlockingSystem Installationshall be of Route setting type using Entry/Exitcontrolwith a facilityfor individualoperationof points.

21.19.4

Signalling and interlockingarrangementsfor the yard shall be in accordancewith the approved signalling plans and selection/route controltables.

21.19.5

Electronicinterlockingsystemshall be capableof wor:kingwith Control cum lndicationPanel (CCIP) or/and Control Terminalwith Mdeo DisplayUnit(VDU).

21.19.6

Electronicinterlockingsystemshall have adequab h.ifrjn reOrnOapy as per approvedspecification.

21.20

are generally Section'A' Para21.2to 21.18,underRelayInterlocking applicablefor ElectronicInterlockingalso.

21.21

CCIPand ControlTerminalwithVideo DisplayUnit (VDU)

21.21.1

of SEM Para2L2shallapply ForCCIP,requirements

21.21.2

sizeto ControlTerminalwithMdeo DisplayUnitshallbe of appropriate dimensionsand shall display layout of the yard in well-proportioned displayall functionsclearlydistinguishable.

21.21.3

Displayindicationson Video DisplayUnit shall conformto Control Panelindicationsas coveredin Para 21.2or otherapprovedtype.

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Page1 of 10

21.21.4 :

On VDU, Operationof Signals, Points and Controlssuoh as Gate, Crank Handleand Slot shall be carriedout throughappropriatedropdown menusor otherapprovedmeanS.

21.21.5

VDU shall have suitable protection facility against unauthorised operation.

21.21.6

All Emergencyoperationsshall be two-step processprotectedagainsi unintendedoperations.

21.21.7

Only non-resettablecounters shall be providedwhile working with CCIPruDU

21.21.8

VDU shallhaveprovisionfor StopGollarsequivalentof GCIP.

.21.21.9

It shall be possibleto switchoverthe controls from CCIP to VDU and vice-versa.

21.21.10

Indicationthat El slatem is healthy shall be displayedon the VDU/ .CCIPas applicablepreferablyusinga blinkinggreenLED.

21.42

INTERFACES

21.22.1

InterfacebetweenControlTerminal,Video DisplayUnit,ControlPanel, systemshallbe of approvedtype. and ElectronicInterlocking

21.22.2

lnterfaceof Points,Signals,Track Circuitsand Controlssuch as Crank Systemshallbe Handle,LC Gate,Slot etc.,with ElectronicInterlocking through Rdays of approvedtype or throughany ElectronicModulesof approvedtype and conformto approvedSpecification.

21.22.3

lnterface betvneenextemal data logging equipment and Electronic systemshallconformto approvedspecification. Interlocking

21.22.4

ElectronicInterlockingSystemsshall be capableof being controlled and monitoredfronra centralizedlocation.

21.22.5

It shall be possibleto networkthe ElectronicInterlockingSystemsfor diagnosticfunctionto a centralizedlocation-

21.22.6

ElectroniclnterlockingSystemmay be capableof beingnetworkedwith othersystemsfor the pupos'e df centralizedcontroland monitoring.

Page2 of 10

21.23

REQUIREMENTS ANDCIRCUIT INTERLOCKING

21.23.1

for the El logic(sitespecificdata)requirements Interlocking application principles for stipulated Relay systemshall be as per interlocking lnterlocking

21.23.2

or logicfor yardremodelling It shallbe possibleto modifyapplication usingapprovedtypeof userinterface. changein interlocking

21.24

POWERUP& SHUTDOWN

21.24.1

systemshalldriveall the relevantsignalsto the lnterlocking Electronic intemalfailureof any naturearisesI aspectwhenever mostrestrictive Interlocking systernis poweredup or duringshutdown. whenElectronic

21.24.2

the systemshallblockall Interlocking, Afterpoweringup of Electronic of safetyfunctionsby El Afterverification signalsandotheroperations. system,this blockingshallbe releasedaftera delayof at least120 second$.

21.25

CONFIGURATION

21.25.1

Electronic lnterlocking system shall be of eitfier cenbdired or distributedtype as per approvedspecification.

21.25.2

ln case of distributedconfigurations,redundancyin communication mediashall:beprovidedfor linkingthe subsystems.

21.26

VERSIONCONTROL

21.26.1

Version of the Generic system software and hardware shall be approvedand controlledby authoritycompetentto approvethe El and its specifications.

21.26.2

Versionof the Applicationlogic (stationspecificlogic)shall be unique for the installationand shallbe approvedby the authoritycompetentto approve the circuit diagrams. GorrespondingChecksum shall be recordedand controlledby the same authority.

21.26.3

Version number and Checksum shall change whenever any are carriedout to the Applicationlogic(sitespecificlogic). modifications Page3 of 10

21.?6.4

A proper record of Checksums shall be maintained at Station, DivisionalHQ and ZonalHQ as a part of completionwiring'diagramas per formatgivenbelow:

VersionControlCertificate 1 2 3 4 5 6 7 8

Nameof Station Descriptionof work CRS/CSTEsanctionNo. & Date. Dateof Commissioning ApprovedSignallingPlan No. ApprovedPanelDiagramDrg. No. ApprovedSelectionTableDrg. No. E.l.WiringDiagramversionNo.

I

E.l.WiringDiagramchecksumNo.

(a) Existing (b) New(a)Existing (b) New(Signature) Officer in-chargeof site

(stgnature)

(AsrEtDsrE)

Works in-charge (Sr.DSTE| Dy.GSTE)

cr- 6TE 21.27

INSTALLATION

21.27.1

Installationof ElectronicInterlockingsystem shall be done as per approvedguidelinesand technicaladvisorynotesissuedtime to time.

21.27.2

Applicationlogic (site specificlogic) shall be verifiedfor safety and funclionalityby carryingout et'raustive safety and functionalitytests by officersauthorisedby CSTE. : Only approvedapplicationlogicwith specifiedchecksumshall be used in the El system and this data and checksum shall be version confolledan.dpreservedby the Railways.

21.27-3'

Page4 of 10

21.27.4

is'requiredto be providedin dustproofcabinets ElectronicInterlocki'ng frontdoor. typehavingtransparent of approved

21.27.5

lnterfaceRelays,where provided,shall be of approvedtype and for betterreliability. asfar as possible shouldbe paralleled contacts

21.27.6

ElectronicInterlockingsystemshall be installedcloserto Operator Room,preferablyadjacentroom. Trackcrossingshouldbe avoided betweenmainEl systemandoperatorroom.

21.27.7

roomshallbe providedwithtilesor similar Interlocking The Electronic on floorandwallsto avoidperiodicpaintingof wallsand arrangements dust. resultant

21.27.8

shallbe usedto carrywires FRP or insulatedladdersarrangement fromrackto rackor fromotherequipment'

21.27.9

roomshallbe suitablysealedto All entriesto ElectronicInterlocking prevententryof rodents,lizards,insectsetc'

Floor Pads and Hand bandsshall be providednear 2 1 . 2 7 . 1 0 Electrostatic

to preventit fromdamagesdue to electrostatic equipment electronic discharges

21.27 . 11

is installed,shallbe provided Interlocking The roomwhereElectronic in areaswhichare pfgne to dr.ustor in viir$ty d with Air-conditioning chemicalfactoriesreleasinginjuriousfumesor in areaswith exheme temperature

of cleanand uncleanwiring-Cleanand uncleanwiring 21.27.12 Segregation and wherethis is not shallbe routedin differentenclosures/ladders, feasible,a minimumdistanceof 150mmbetweencleanand unclean (Cleanwiringis completelyindoorsand wiringshallbe maintained. uncleanwiringis one coming doesnot carryany externalinfluences; fromextemalcircuitsandpowersupplycircuits) 21.27.13 lf cleanand uncleanwiringneedto crossat any place,thenit shoutd to eachother, at perpendicular be arranged devicesshallbe installedfor typeclass'C'surgeprotection 21.27.14 Indicative all copperbased externalinterfaceports (Power,communication, etc). Earthwire from Surge terminal,panelinter:face maintenance protection deviceto mainearthterminalinsidethe roornshouldbe as straightand shortas possibleto providea low impedancepathfor of surgeenergies. discharge Page5 of 10

21.27.15

to mainearth subsystems Earthingwires from electronicinterlocking (GNYE) Yellow color.Greenor Green terminalshallbe of distinctive loose or color is recommendedfor quick identificationof a possiblg oig*nn"ag6 earthwire.All earthwiresshallbe as straightas

u91ta!ecT!:T::: sho.uld All'Earth ;{lh;ll ;everbecoiled. ryrel be lessthan4 Squaremm copper and shouidnever carrying'capacity crosssection.

21.27.16

devices inside electronic Usage of mobile and radio-frequency roomshallbe prohibited' interlocking

21.28

TESTING

.21.28.1

per chapterxlll system testing of El system shall be carried out as Para 13.38 at the time of initial installationand during subsequent in interloctcing. modifications

21.29

POWERSUPPLY

21.29.1

$ d e q u a te re d u n d a n c yinpower supp|yar r angem entsfor E|system s and includingVDUs shall be providedas per approvedspecifications guidelines.

21.29.2

is Wires connectingequipmentshallbe of adequatesize so that there

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EARTHIHG

21.n.1

Eartrringshall be provirledas per approvedspecifi-cations,.drawings and code of prafiice. A generic eartring and equipotentialbonding schemeis providedatAnnexlre-35'

21.T.2 21.30.3

To the extent possible,perimeterearth shall be providedaroundthe Electroniclnterlockingtoo*,.:, .. . value snan,'be let" than one ohm and shall be measuredannuallyduringdry'season

Page5 of 10

21.31

MAINTENANGE

21,31.1

Maintenanceof ElectronicInterlockingsystem shall be done as per approved system .maintenancemanuals. A general maintenance schedule for Electronic interlocking.is provided for guidance at Annexure-34.At stationshaving dense traffic and high speeds,the Railways may prescribe more frequent inspections,if considered necessary(IRSEMPara19.48).

21.31.2

MaintenanceTerminal of Electroniclnterlockingsystem shall be providedin the SignalTechnicianDutyroom.

21.31.3

Periodictestingof redundantsystemsshallbe caniedout.

21.31.4

Checksurnsshallbe verifiedduringperiodicinspections.

21.32

FURTHERREADING

21.32.1

to withlatestrevisionsare applicable Standards FollowingInternational developmentand implementationof safety related railwaysignalling systemsand projectsincludingElectroniclnterlocking.IEC standsfor Commission"and CENELECstandsfor "lnternationalElectro-technical "European Committee for Electro-technicalStandardization'.Both CENELECand IEC have equivalentstandardson each of the su$ects as givenbelow: CENELEC tEc

EN 50126

Subject RailwayApplications' The Specification Of Reliability, And Demonstration and Safety tEc 62278 Availability,Maintainability (RAMS)

- Cornmunications, applications Railway systems andprocessing Signalling for railwaycontrolandprotection EN 50128 tEc 62279 Software systems - Communication, applications Railway systems andprocessing Signalling EN 50129 Ee 62425 Safetyrelatedelectronicsystemsfor Signalling - Communication, Railway applications systems andprocessing E N 5 0 1 5 9 rEc62280 Signalling (Part1 & 2) communication Safetv-related Page7 of 10

AN.NEXURE-34 21.31 GeneralMaintenance Schedulefor E.l. Sl No

Maintenanceworkto bedone

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2

1

Voltagesshallbe checkedat Check points.

2

Coolingarrangementslikefans,dust filters. Checksumsto be verified.

3

PeriodiciW Paragraph reference Technicia JElSE-Signal sE/ssEn (Signal| (lnchargeof Signal (Overall section) lnchareel 4 6 3 5 M 2I.3t.L M

a

M

M

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a

2t.3t.4 ,M

a

M

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4

Visualchecks of indications on Eland subsystems

5

Systemchangeover

6

Tightness of al terminalsandcables, Earthwiresetc.

7

Paneltovideo,videoto video changeovers etc.

M

a

8

Surgeprotectiondevicesincluding A,B,C,D class

M

a

9

Redundanry in communication, DCDCconvertersetc.

M

a

10

Cleanliness of room andequipment

M

a

11

Emergency crankhandle

72

Checkineof error loss

M

21.31.3

a

21.31.3

M

a M

M= Monthly,Q=Quarterly

Page9 of 10

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CENELEC rEc

Subject

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areapplicablefor design' withlatestamendments 21.32.2'" , RDSOSpecifications of Electronicsystems' testingandmaintenan@ installation,

Arun.KumarJain

AkhileshYadav Secretar!,,DireclorSignat,RDSO, Lucknow

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lr{erpber,CSTE/IRPMU'Allahabad

G.K.Sarkar

o.0. "./ Mishra

. Member, Mumbai. csTE l, westernRailway,

csE EasternRailway'l(oft(d' Mernber,

S.Lakshminaray€ma Hubli. CSTE/SWR, Gonvemor&

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