TECHNICAL SPECIFICATION OFRTU · Page5of27 ALSTOM make S900 RTU, (iii) existing Net Work Management System(NMS)and/or new NMS of Control Centre (iv) Fiber Optic terminal equipment

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TECHNICAL SPECIFICATION OFRTU

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Index

Section1: TECHNICALSPECIFICATIONOFRTU.........................................4

1.0 General...................................................................................................4

1.1 DesignStandards...................................................................................5

1.2 RTUFunctions........................................................................................5

1.3 Communicationports..............................................................................6

1.4 Modems..................................................................................................6

1.5 LocalLogger/PrinterInterface................................................................7

1.6 LocalConfiguration&MaintenanceInterface.........................................7

1.7 LocalDataMonitoringSystem(LDMS)Interface....................................7

1.8 CommunicationinterfacebetweenRTU&MFTs....................................8

1.9 CommunicationProtocolbetweenRTU&IEDs......................................8

1.10 MasterStationCommunicationProtocol.................................................8

1.10.1 Scangroups ....................................................................................9

1.10.2 Reportingofstatuspoints................................................................9

1.10.3 ReportingofAnalogpoints............................................................10

1.10.4 Digitalcontrolcommands..............................................................10

1.11 DataConcentratorCommunicationProtocol........................................10

1.12 AnalogInputs........................................................................................10

1.13 StatusInputs.........................................................................................11

1.13.1 ContactMultiplyingRelay..............................................................12

1.13.2 MomentaryChangeDetection.......................................................12

1.14 DigitalTelemetry...................................................................................12

1.15 SequenceofEvents(SOE)feature......................................................12

1.16 ControlOutputs....................................................................................13

1.16.1 TwoStateMomentaryControl.......................................................13

1.16.2 Raise/LowerPulseOutput.............................................................13

1.16.3 TimedSupervisoryControl............................................................14

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1.16.4 ControlOutputInterposingRelays(DoubleContactDigitalOutput) 14

1.16.5 Latching(DummyBreaker)Relay.................................................14

1.16.6 ControlSecurityandSafetyRequirements....................................14

1.16.7 Local/Remoteselectorswitch........................................................14

1.17 Timefacility...........................................................................................15

1.18 Diagnosticfeatures...............................................................................15

1.19 InputDCPowerSupply........................................................................15

1.20 EnvironmentalRequirements...............................................................16

1.21 Noiselevel............................................................................................16

1.22 RTUSizeandExpandability.................................................................16

1.23 RTUandSICpanels.............................................................................15

1.24 Interconnections...................................................................................16

1.25 Wiring/Cablingrequirements................................................................17

1.26 TerminalBlocks....................................................................................17

1.27 RTUArchitecture..................................................................................18

1.28 Transducer&WeatherSensorRequirements.....................................18

1.28.1 TransducerProtection...................................................................18

1.28.2 Multi-FunctionTransducers(MFTs)...............................................18

1.28.3 TransformerTapPositionTransducer...........................................19

1.28.4 WeatherSensors...........................................................................19

1.28.4.1 AirTemperatureSensor.........................................................20

1.28.4.2 RelativeHumiditySensor.......................................................20

1.28.4.3 RainfallSensor.......................................................................20

1.28.4.4 WeatherSensorInstallationRequirement..............................21

1.29

PortableConfigurationandMaintenanceTerminal(PCMT)..............21(a)RTUData

baseconfiguration.................................................................21(b)LocalOperat

orinterfaceand RTUdiagnostics.................................22 (c) Masterstation-

cum-RTUsimulator&protocolanalyzersoftwaretool...22

1.30 TESTING..............................................................................................23

1.30.1 RTU/SICTesting...........................................................................23

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Section1: Section1:

TECHNICALSPECIFICATIONOFRTU

1.0 General

TheRemoteTerminalUnit(RTU),shallbeinstalledatSubstations to acquire analog data such as,

KW export, KW import, frequency, OLTC,power factor, maximum demand, planned outage

duration & numbers, forced outage duration & numbers, electricity consumed locally, MVA

capacity of Sub-Station, length of Transmission lines etc.&also digital data like status of

isolators, circuit breakers etc. at each Sub-Station under this scope of work and

transfer those information to data server at SLDC. RTU shall also be used for control of

station devices from Master station. The necessary data base creation at SLDC for integration of

RTU with control Centre i.e. SLDC is also included under this scope of work. RTU shall also

be used for control of station devices from Master station. I n a d d i t i o n w i t h t h a t

eachsubstationunderthescopeofthisprojectshallhave

aPCbasedLocalDataMonitoringSystem(LDMS).TheseDASPCsshallbe usedfor

acquisition,monitoringofvariouselectricalparametersand

generationofreportsandlogsheetsinlinewiththerequirementsof the

specification.ThesuppliedRTUsshallbeinterfacedwith the Control &Relay (C&R) panels,

communication equipment, power supply

distributionboards;forwhichalltheinterfacecablesshallbesuppliedby the Contractor.

Thisdocumentdescribesthespecificationsfor the RemoteTerminalUnit(RTU).

ContractorshallsupplyRTU,associatedequipmentsuchas transducers,relays,

weathersensors,modems,cablingetc.andrequirednumberofpanelsforhousing

ofallthehardwareenvisagedfortheRTUandsysteminterfacecubicle(SIC).

Thecontractorshallberesponsibleforsupplyingallhardware,software,installation,

cablingandfieldimplementationforRTUasdefinedin thisSpecification. The

contractorshallalsoprovidecompletedocumentation,trainingandtestingto fully

supportthehardwareandsoftwareprovided.TheRTUshallbeusedfor real-time

supervisionandcontrolof substation/powerplantthroughSCADAsystem.RTU

configuration/pointcount,transducercountandrequirementof weathersensors

quantityisgiveninschedule of works.

Itis Employer’sintentthattheContractorusesasmuchstandardhardwareandsoft-

wareaspossible;however,allofthefunctionalrequirements ofthisSpecification

mustbesatisfied.TheuseoftheContractor'sstandardhardwareandsoftwaremay

causetheContractorto concludethatthereisaneedforadditionalitemsnot specifically mentionedin

this Specification. The Contractorshall supply all such itemsandprovidea

completeRTUdesignthatmeetsalloftheEmployer’sfunctional

requirementsdefinedinthisSpecification.

It is the responsibility of the bidderto configuretheRTU to make it compatible with (i) M/s

Chemtrol make RTU to be supplied under ULDC expansion project of WBSETCL,(ii) existing

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ALSTOM make S900 RTU, (iii) existing Net Work Management System(NMS)and/or new NMS

of Control Centre (iv) Fiber Optic terminal equipment to be supplied under this project, (v)

Existing PLCC equipment of WBSETCL, (vi) Readily available standard Fiber Optic terminal

equipment & PLCC equipment.

TheWeatherSensorsto besuppliedundertheprojectshallbefieldprovenandshall

havebeeninsuccessful operationformeteorological application foratleastone

yearasondateofBidopening.TheBiddershallfurnishthedocumentaryevidence

insupportoftheaboveandsubmitthesamealongwiththebid.

1.1 DesignStandards

TheRTUsshall bedesignedin accordancewithapplicableInternationalElectro-

technicalCommission(IEC),InstituteofElectricalandElectronicsEngineer(IEEE), American

NationalStandards Institute (ANSI), and National Equipment

Manufacturersassociation(NEMA)standards,unlessotherwisespecifiedin this

Technicalspecification.Inallcasestheprovisionsofthelatesteditionorrevisionof

theapplicablestandardsineffectshallapply.

1.2 RTUFunctions

AllfunctionalcapabilitydescribedhereinshallbeprovidedbytheContractorevenif

afunctionisnotinitiallyimplemented.Thetermmasterstationisusedtodenotethe SCADA systems.

As a minimum, the RTUs shall be capable of performing the followingfunctions:

(a) Collecting and processing the digital status inputs, analog inputs,

accumulatedvaluesandtransmittingtoat least threemaster station(s)

(b) Receiving andprocessing digital&analog controlcommands from at least three

master masterstation(s)

(c) Accepting polling messages from at least three master station(s)

simultaneouslyusingseparatelogicaldatabasesforeachmasterstation.

(d) Communication simultaneouslyon all Communication ports (as per cl.

1.3)andusingmultipleconcurrentprotocols,includingtheIEC60870-5-

101,60870-5-104&MODBUS/103protocol.

(e) Datatransmissionratesfrom300to9600baudforserialports(forboth IEC60870-5-

101&MODBUS/103)and10/100MbpsforTCP/IPEthernet ports.

(f) RTU shallbe compatible with protocol 61850 for communication with

IEDs.

(g) RTU shallhave the capability of automatic start-up and

initialisationfollowingrestorationofpowerafteran outagewithoutneedofmanual

intervention. All restartsshall be reported to the connected master station(s).

(h) RTUshallsupporttimesynchronizationthroughmessagesreceivedfrom

masterstationusingIEC60870-5-101/ IEC60870-5-104protocol.

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(i) RTUshallsupportdownloadingofRTUdatabasefromthemasterstation

usingtheIEC60870-5-101andIEC60870-5-104protocol.

(j) RTUshallsupportSOE(Sequenceofevents)feature

(k) Actingasa dataconcentratorforacquiringdatafromSlaveRTUsand

exercisingsupervisorycontrolonslaveRTUsusingIEC60870-5-101and IEC60870-5-

104protocol.

1.3 Communicationports

The RTUsshallsupportsimultaneouscommunicationswith multipleindependent

masterstations(SCADAsystem),maintenanceandconfigurationterminal(Laptop PC),a

locallogger(printer),Multi-functiontransducersand LocalDataMonitoring

System(LDMS)/Logger.

TheRTUsshallhavecommunicationportsasfollows:

a) TwoEthernetportsforconnectivitytoMasterStationonIEC60870-5-104

andtorelaysonIEC61850.

b) 2RS232ports–forcommunicationwithmasterstationson IEC60870-5-

101

c) OneportfortheRTUmaintenanceandconfigurationterminal.

d) One port for Local Data Monitoring System (LDMS) and local logger

(printer).

e) Requirednumber(minimumtwo)ofRS485portsforpollingMulti-function

transducersusingMODBUS/103protocolinmulti-drop(partyline)mode

ItshallbepossibletoincreasethenumberofcommunicationportsintheRTUby

additionofcards,ifrequiredinfuture.TheRTUshallrespondtoindependentscans and commands

from Master Station, LDMS and Configuration &Maintenance

Terminalsimultaneously.TheRTUshallsupporttheuseofadifferentcommunica-

tiondataexchangerate(bitspersecond)andscanningcycleoneachport.

1.4 Modems

Themodemscanbeusedfor RTUcommunicatingto masterstation.The Contractor shallsupply

two(2)number modems oneatControl Centre/Stand aloneandotheratRTUend.

Themodemforremoteend,completeinallrespectsincludingpowersupplyunit&rackshallbesupplied.

ThesemodemscanbelocatedeitherintheFEPatControl

CenterendoratotherCommunicationnodes(StandAloneModem).

Themodemsshallmeetthefollowingrequirements:

a) UseCCITTStandardsincludingV.24,V.28.

b) Usefrequencyshiftkeying(FSK)modulation.

c) Communicateatdataratesof300,600and1200bps.

d) UseCCITTR.38a,andR.38bstandardtonesfortheselectedRTUdata rate.

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e) UsePLCC bandwidthupto4khzandshall accommodate multiple data

channelsoverandabovevoicechannels.

f) Useboth2-wireand4-wirecommunicationlines.

g) Receiveleveladjustablefrom-8to-40dBm@600ohms. h)

Transmitleveladjustablefrom0to-24dBm@600ohms. i)

Haveaminimumsensitivityof-48dBm.

j) Shalloperateon48VDC powersupply, positive earthedk)

CompatiblewithIEC101/104

1.5 LocalLogger/PrinterInterface

TheRTUsshallincludethe interfaceto supportanoptionallocallogger/printer.The

interfaceshallprovideeasyaccesstoallowemployertoconnecttheloggeratthe

RTUsinstalledinthefield.

1.6 LocalConfiguration& MaintenanceInterface

TheRTUsshallincludetheinterfaceto supporttheportableconfigurationand

maintenanceterminal(PCMT).Theinterfaceshallprovideeasyaccessto allow

employertousethemaintenanceterminalattheRTUsinstalledinthefield.

1.7 LocalDataMonitoringSystem(LDMS)Interface

TheRTUsshallincludetheinterfaceforcommunicationwiththeLDMSsystem.The

LDMSshallbeusedforlocaldataacquisition,monitoringandcontrolofsubstation parameters

throughRTU. The scopeof LDMS shall include installation and

integrationofLDMSsoftwareonaPersonalcomputer.

TheLDMSshallbeaminiSCADAsystemprovidingMMIcapabilityforuseinthe sub-station

controlroom building. The LDMSsoftware shall include following functions:

I. dataacquisitionforanalog,digitalandpulseaccumulatortypedata

II. data processing – Conversion to engineering units , limit monitoring, data

validitytest,calculateddata

III. calculateddata(suchasmaximum,minimum,average valueswithassociated time-

stampingetc.)ofallthestationparameters.

IV. TimeSynchronization

V. SequenceofEventsProcessing

VI. Supervisorycontrol

VII. Alarm,tagging,trending,qualitycodesetc.

VIII. Single Line Diagrams,Trends,daily,weekly,monthlyreportsetc.shall be

preparedbythebidderandintegratedonLDMSsystem. TheLDMSshall

alsohavecapabilitytogenerateadditional displays, singlelinediagrams,

reports,andtrends.

TheLDMSshallstoreallreal-timetelemetered& calculateddataevery5 minutes

(adjustableto15,30,45,60minutes).Thesoftwareandhardwareshallbesized forstorageof

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allabovedataatevery5minutesforatleastsixmonthsduration.

Allalarms,events,SOEetc.shallalsobestoredon regularbasis. Itshallbe

possibletodefinedaily,weekly,monthly SubstationreportsonLDMS.It shallbe

possibletogeneratereportshighlightingthemaximum,minimum,average with associated time-

stampingetc.ofallthe stationparameters.Thehistoricaldata stored

onthestoragemediumshallbeinstandardformatandnecessarytools foritsexportto

standardspreadsheetprograms(Excel)shallbeprovided.

TheLDMSshallupdateanalogdatafromRTUeverytenseconds(programmable)

andstatusdatabyexception.TheSOEstatusdatashallberecodedwithresolution of10mstimestamp.

1.8 CommunicationinterfacebetweenRTU&MFTs

TheRTUshallacquiredatafromtheMFTs.TheMFTswillactasslavetotheRTU.

TheRTUshallhavetheabilityofissuingretryscanto acquiredata fromtheMFTsin

caseofcommunicationfailurebetweenRTUandMFTs.All datafromthedevices

connectedonasingleportshallbeacquiredwithin5seconds.

1.9 CommunicationProtocolbetweenRTU&IEDs

TheRTUshallusetheIEC61850protocolforcommunicationwithIEDsoverSub-

stationLAN.TheRTUshallactasaClientandcollectdatafromtheIEDs).

TheRTUshallstorethe dataacquiredfromtheMFTs&IEDsin itsdatabaseanddo

processinglikechangedetection/deadbandprocessingonthedataforoptimizingits transmissionto

theMasterStation(SCADAControlCentre).Theprocessingshall

includerequirementsofmappingofinformationfromtheprotocolofMFT/IEDstothe

protocolrequirementforcommunicationwithControlCenter.

1.10 MasterStationCommunicationProtocol

The Contractorshall provide a communication protocol for communicating with

SCADAmasterstationsusingtheIEC60870-5-101and IEC60870-5-104

communicationprotocolstandard.Thecommunicationprotocolshallsupportallthe

requirementsofthisstandard.Thecommunicationprotocolshallbenon-proprietary andthe

Contractorshallprovidecompletedescriptionanddocumentationofthe protocoltoOwner.

TheRTUshallperformasaslavetoSCADAmasterstation.Allcommunicationshallbe

initiatedbytheSCADAmaster

stations.RTUmustnotifythemasterstationsofunusualconditionsattheRTU(such

asapowerfail/restorationorRTUmalfunction),thetransferofchangeddataetc.All the

notificationsshallbeaccomplishedwithinthe frameworkofthe periodicdata acquisitionexchanges.

TheRTUshallprocessthevariousmessages/commands forcommunicationtothe

Masterstationusingthefollowingpriority.a)

Controlcommand

b) Statusdatabyexceptionc)

Analogdatabyexception d)

Analogdataperiodic

e) Statusdataintegrityscan

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The communication interface to the master station(s) shall allow scanning and

controlofdefinedpointswithintheRTUindependentlyforeachmasterstationusing

aseparatelogicaldatabaseintheRTU.Itshallbepossibletopickpointsfromthe

RTUdatabaserandomlyandassignitforreportingtoaMasterstation.Further,the

RTUshallsupporttheuseofadifferentcommunicationdataexchangerate(bitsper

second),scanningcycle,and/orcommunicationprotocoltoeachmasterstation.

1.10.1 Scangroups

Analoganddigitalinputpoints(includingpointsreportedby exception)shallbe assignable

toscangroups.Ascangroupshallbeaspecified setofdatapoints

withintheRTUcentraldatabasewhichwillbecommunicated toamasterstation whenrequestedbya

specific(addressed)scanrequest.Ascangroupsizeshallonly

belimitedbythecommunicationprotocolmessagelength.AnyRTUinputpointshall beassignable

toanyscangroup. TheRTUsshallsupport atleastsixteenscan groupsandallscangroupsper

communicationport(i.e.masterstation/LDMS interface). The Contractorshall provide a

convenient and flexible scheme for assigningpointsintheRTUtoscangroups.

1.10.2 Reportingofstatuspoints

TheRTUcommunicationprotocolshallbeconfiguredtoreportdigitalstatuschanges

byexceptiontomasterstation.Digitalstatusdatashallhavehigherprioritythanthe Analogdata.All the

digitalstatusdatashallalsobeassignedto scangroupsfor

integritycheckbyMasterstationsatevery10minutes.

1.10.3 ReportingofAnalogpoints

Theanalogdatashallbereportedperiodicallytoupdateallthevaluesatthemaster

stationwithin10to15seconds.Analogdatashallalsobereportedbyexceptionif

theanalogvalueexceedsitspreviousvalueby morethan20%.

1.10.4 Digitalcontrolcommands

TheRTUshallfollowtheselect-and-executesequenceforoperationofdigitalcontrol

commandsfromthemasterstation.TheRTUshallresetitscontrollogicuponany errorinthesequence.

1.11 DataConcentratorCommunicationProtocol

TheRTUshallactasaIEC60870-5-101andIEC60870-5-104protocolmasterand collectdataand

alsoperformsupervisorycontrolfrom/ontheslaveRTUsand

communicateittotheControlCenter.TheMasterprotocolimplementationshallbe

suchthatthedatapollingrequirementsmentionedat section1.10is atleast accomplished.

RTUasaDataconcentratorshallbeprovidedwithatleastthree(5)IEC101 andseven(7)IEC104 inputports/cardsandshallhavecapabilityto reportto twomasterstationsonIEC104 interface. Data

concentratorshall support at least 1,500 (fifteen hundred) data points.TheRTUasa

DataConcentratorshallbesuppliedwithGPSreceiversystem withantenna,cableetc.fortimestampingofDataconcentratorwhichinturnshall

synchronizetheIEC101and IEC104 protocolconnectedRTU/device.TheRTUasa Data Concentratorshallcomecompletewithbuiltinmonitoringmechanismtoavoidloss

ofanydata,especiallytheonereportedbyexception.Thedataconcentratorshall havedualCPUanddualPowersupplyunit. Theoveralldataupdaterequirement fromany Sub-RTUto

Controlcentreshouldnotaffectthefunctionalitydefined elsewhereinthespecification.

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TheDataconcentratorshallhavetheprovisionforremoteloginfromControlcentre.

TheSLDCcomputersystemshallbeableto configureandpollhealthofData

concentratorfromremoteon104connectedinterfaceafterdueauthenticationofthe users.

It shallsupport diagnostic &maintenance activities remotely. Individual RTU

configurationshallbe possiblefromDataConcentratorincludingaccommodating

devicesfromheterogeneoussuppliers.TheRTUasaDataConcentratorshallhave

followingcommunicationports&supportforprotocols:

i. IEC104forSCADAcontrolcenters.ii.

IEC101forSub-RTUs.

iii. IEC104forSub-RTUs.

iv. IEC101/104forlocalSCADA

The other requirements given for RTU elsewhere in the specification shall be

applicabletoRTUasaDataconcentratoralso

1.12AnalogInputs

TheRTUshallaccommodateanaloginputswhichare unipolaror bipolar,2-wire

ungroundeddifferentialsignals.Allanaloginputsareof+4to+20mA.However,theRTUshallbecapabl

eofacceptingotherstandardanaloginputranges(0to5V,0-10V,0to10mA).

TheRTUshallmakeall appropriatesignallevelconversionand conditioningtoallow full

utilizationof analoginputsandmeaningfulreasonabilitychecking.Theanalog-to-

digitalconvertershallhaveaminimumresolutionof2048counts(signplus11data

bits).Eachtypeofanaloginputshallbeconvertedwithfullresolution.TheRTUshallmonitorthedriftinc

haracteristicsofitsADCandmarktheanalogpointswithadriftqualitycodeifadriftisdetected.Thisdrift

qualitycodeshallbesenttothemasterstationalso.

TheRTUaccuracy,foranaloginputmeasurement,shallbe99.8%or betterat 25

degreeCambienttemperature.Meanaccuracyshalldriftnomorethan0.002%per

degreeCwithinthetemperaturerangeof–5 to+55degreeC.Determinationof

accuracyshallbemadewhiletheanalogmultiplexerisoperatingatratedspeed.

Eachinputshallhavesuitableprotectionandfilteringto provideprotectionagainst

voltagespikesandresidualcurrentat50Hz,0.1ma(peak-to-peak)andoverload. Loadingupto150%of

theinputvalueshallnotsustainanyfailuresto theRTUinput.

ThetotalinputimpedanceofferedbytheRTUshallnotbegreaterthan250 (for+4 to+20mArange).

AllanaloginputsshallbescannedbytheRTUfromthefieldatleastat1second periodicity.

1.13StatusInputs

RTUshallbecapableofacceptingisolateddry (potentialfree)contactstatusinputs.

TheRTUshallprovidenecessarysensingvoltage,current,opticalisolationandde-

bouncefilteringindependentlyfor eachstatusinput.The sensingvoltageshallnot

exceed48Vdc.ThesensingvoltagesourceshallbeisolatedfromthatoftheRTUs logicpowerso

thatanynoiseora shortcircuitacrossthesensingsupplyofadigital

statusinputterminalswouldnotdisrupttheRTUoperationotherthantheshorted digitalstatusinput.

TheRTUshallbesettocapturecontactoperationsof20msor moreduration. Operations

oflessthan20msduration shall beconsidered nochange (contact

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bouncecondition).TheRTUshallaccepttwotypesofstatusinputsi.e.Singlepoint

StatusinputsandDoublepointstatusinputs.

Singlepointstatusinputwillbefromanormally-open(NO)ornormally-closed(NC)

contactwhichisrepresentedby1-bitintheprotocolmessage.

Doublepointstatusinputwillbefromtwocomplementarycontacts(oneNOandone

NC)whichisrepresented by2-bitsintheprotocol message. Aswitching devicestatusis

validonlywhenone contactis closedandtheothercontactis open.Invalid

statesshallbereportedwhenbothcontactsareopenorbothcontactsareclosed.

All status inputs shall be scanned by the RTU from the field at 1 millisecond periodicity.

1.13.1 ContactMultiplyingRelay

Contactmultiplyingrelays(CMRs)arerequiredtomultiplytheauxiliarycontactsof breaker/isolators

etc.Thecontactsoftheserelaysshallbeusedtoprovidestatus inputto

theRTUs.Therelaysshallbeofselfresettype.Therelayshallhavea

minimumoftwochangeovercontactseachwithminimumcurrentcarryingcapacity

of5Aat110V/220VDC.

Therelaysshallconformtothefollowingrequirements:

a) Power frequency withstand voltage: 2 kV for 1 minute as per IEC

standards.

b) Insulationresistanceof100Mohmsat500VDC. c)

5KVImpulsetestasperIECstandards

TheCMRsshallbegenerallymountedinexistingcontrol&Relaypanelbutincase of non-availability

of space, it shall be accommodated in the System Interface

Cabinets(beingsuppliedbytheContractor).

1.13.2 MomentaryChangeDetection

Two-statestatusinputpointswith momentarychangedetectionshallbe usedby Employerfor

pointswheremultipleoperations(changesofstate) can occurbetween scansfromthe

masterstation(suchasbreakerswithauto-reclosingdevicesthat operate fasterthan the master

station scan rate). The RTUshall capture and

maintainallofthemomentarychanges,upto4perMCDdigitalstatuspoint.The

MCDstatusinputpointsshallbesettocaptureoperationsofgreaterthan20ms duration.

Alternatively,theRTUcanstoreandreportthemultiplestatechangesofadigital

inputasdiscreteevents.Itshallbeensuredthatallthechangesarereportedto the

MasterstationinthesequenceinwhichtheyoccurintheRTU.

1.14DigitalTelemetry

Digitaltelemetryinputpointsshallbeprovidedforsixteenbitinputsfromemployer telemetry contacts.

Thedigitaltelemetry mayuseBCD, (4bitdecimal character withoutsign)and/orbinary(16bit)codes.

1.15Sequenceof Events(SOE)feature

SOEisthetime-stampeddigitalstatusdata.SOEswillenableEmployer'spersonnel to

determinethesequentialoperationofdigitalstatusinputdevicesfortheirstate changes.

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TheRTUshalltime-stampthedigitalstatusdatawithatimeresolutionof onemillisecond.

Initially,allbreakers&protectioncontactsdigitalstatusinputpointsintheRTUshall beconfigured

asSOEpoints. However itshallbepossible toassign anydigital

statusinputdatapointintheRTUasSOEpoint.Each time aSOE status input point changes state, the

RTU shall time-tag the changeandsendittotheMasterstation.TheRTUshallmaintain aSOEbuffer

withintheRTUforcommunication delaysandcommunication failure.SOEbuffer

shallbesizedtostore,asaminimum,of600events.TheRTUshalltransmitthe

SOEdatastoredinitsbuffertomasterstation.Anacknowledgement ofreceiptby

themasterstationshallbemadepriorto thelossofanydatain the RTUSOEbuffer.

Datanotreceivedatthemasterstationshallberetransmitted.TheRTUshallsenda message to the

master station to indicate the RTU SOE data buffer overflow condition.

1.16ControlOutputs

TheRTUshallprovidethecapabilityforamasterstationtoselectandchangethe stateofdigitaloutput

points. Device controlwillbeusedbyemployer tocontrol powersystemdevicesincluding:

(a) Two-stateDevices:Circuitbreakers, motor-operated switches,auto/ma-

nualswitches,relaydisable/enable,andothertwo-statedevices

(b) VariableOutputDevices:Raise/lower controlofgenerators, transformer load-tap-

changers(LTC),andothervariableoutputdevices.

TheRTUsshallhavethecapabilityforcontroloutputsasdescribedinthefollowing sections

1.16.1 TwoStateMomentaryControl

Apairofoutputsshallbesuppliedforeachtwo-state(open/close) controloutput

pointthatdrivecontrolrelays.Oneoutputshallbesuppliedforopen,theotherfor

close.Uponcommandfroma masterstationusingthecheck-before-execute

sequence,theappropriatecontroloutputshallbeoperatedforapreset(momentary)

timeperiod.Theoperationperiodshallbeadjustablefor eachpointfrom0.1to2 seconds.

1.16.2 Raise/LowerPulseOutput

Apairofoutputsshallbesuppliedforeach(raise/lower) controloutputpointthat

drivecontrolrelays.Oneoutputshallbe suppliedforraise,theother forlower.When

commandedfromthemasterstation,theappropriateraiseorloweroutputshallbe operatedfor the

selectedtimeinterval.Theclosuretime intervalforraise/lowerpulse

outputpointsshallbespecifiedintheoperatecommandfromthemasterstation.

Theraise/loweroutputforeachpointshalloperateoverarangeof0.1to4seconds

inaminimumofeightequalincrements.

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1.16.3 TimedSupervisoryControl

The RTUshallstore TimedSupervisorycontrolcommandreceivedfromthe SCADA

system.ThissupervisorycontrolcommandfromtheSCADAsystemshallcontain

the‘time’uptoaresolutionofmillisecondsandthetypeofcontrolOperation.

TheRTUshallthenperformthesupervisorycontrolcommandatthespecifiedtime.

TheSCADAsystemshallbeabletocancelthiscommandpriortotheoccurrenceof

thespecifiedTimeofOperation.

1.16.4 ControlOutputInterposingRelays(DoubleContactDigitalOutput)

Controloutputinterposingrelaysshallbesuppliedby theContractorfor eachcontrol

outputspecifiedinappendix.Eachcontrolrelayshallconsistoftwoisolatedsingle- poledouble-

throwcontacts.Theoutputcontactsshallbe ratedtocarryminimum

currentof10ampsat220VDC,andshallprovidearcsuppressiontopermitinter-

ruptionsofaninductiveload.Relaycoilsshallbeshuntedwithdiodestosuppress

inductivetransientsassociatedwithenergizingandde-energizingoftherelaycoils.

TherelaysshallconformtotheIECstandards.

1.16.5 Latching(DummyBreaker)Relay

TheContractorshallprovidea latchingrelaytobeusedtosimulateandtest supervisory controlfrom

the RTU. The simulationrelay shall accept the control signalsto

openandclosefromtheRTU,andshallprovidethecorrectindication

responsethroughasinglecontactindicationinputpoint.Thispointisnotincludedin

theRTUpointcountinSchedule of works.

1.16.6 ControlSecurityandSafetyRequirements

TheRTUshallincludethefollowingsecurityandsafetyfeaturesasaminimumfor controloutputs:

(a) Select-and-executesequenceforcontroloutput.

(b) Nomorethanonecontrolpointshallbeselectedatanygiventime.

(c) Thecontrolselectionshallbeautomaticallycancelledifafterreceivingthe "control

selection" message, the "control execute" command is not

receivedwithinthesettimeperiod.

(d) Thecontrolselectionshallbeautomaticallycancelledifafterreceivingthe "control

selection" message, the "operate" command is not the next

receivedmessageandisnotreceivedwithinthesettimeperiod.

(e) Nocontrolcommandshallbegeneratedduringpoweruporpowerdown ofRTU.

1.16.7 Local/Remoteselectorswitch

A manualLocal/RemoteselectorswitchshallbeprovidedforeachRTUtodisableall control

outputsbybreaking the power supply connection tothe control outputs.

Page14of27

Wheninthe"Local"position,theLocal/Remoteswitchshallallowtestingofallthe control outputsof

RTU without activating thecontrol outputs tofield devices. A

statusinputindicationshallbeprovidedfortheLocal/Remoteswitchto allowthe SCADAsystemto

monitorthepositionoftheswitch.Thispointisnotincludedin the RTUpointcountdefinedinSchedule

of works.

1.17Timefacility

TheRTUshallhaveaninternalclockwiththestabilityasdefinedinTable-1.The

RTUshallbesynchronisedthroughsynchronisationmessagefrommasterstationat every10

minutesusingIEC60870-5-101/104protocol.TheRTUshallsupportthe

calculationofthepropagationdelaydynamicallybytheMasterstation.However,all

theRTUsshallhaveasuitableinterfaceforreceivingsynchronizationsignalsfroma localGPSreceiver.

TheRTUscommunicatingoverIEC-60870-5-

101/104shallbesuppliedwithaGPSreceiverforsynchronizationofRTUclock.

TheRTUshallsynchronizeitsinternalclockwiththemasterstationsystemclock when time

synchronization messages are available and shall mark all the time stampedinformation/data

asinvalidwhentheRTUclockisnotsynchronisedwith theMasterstation.

1.18Diagnosticfeatures

TheRTUdesignshallfacilitateisolationandcorrectionofallfailures.Thefollowing features which

promote rapid problem isolation and replacement of failed componentsshallbeprovided:

a) Self-diagnosticcapabilitieswithineachRTUwhichcanbeinitiatedatthe RTUsite.The

diagnosticsoftwareshall check for memory,processor,and

input/outputportserrorsandfailuresofotherfunctionalareasdefinedin

thespecificationoftheRTU.

b) On-lineerrordetectioncapabilitieswithintheRTUanddetailedreporting

totheconnectedmasterstationofdetectederrors.Itshallbepossibleto

choosetheerrorstobesenttotheMasterstationwithintheframeworkof

thecommunicationprotocol.

c) LocalindicationofmajorRTUfailures

d) Anon-volatileeventbufferthatshallrecordallfatalerrors/restarts/faults.

1.19InputDCPowerSupply

TheRTUwill bepoweredfroma 48VDC(+veearthed)system.TheRTUshallnot

placeadditionalgroundontheinputpowersource.Thecharacteristicsoftheinput

DCpowersupplyshallbe

(a) Nominalvoltageof48Vdcwithoperationbetween41and60Vdc.

Page15of27

(b) MaximumACcomponentoffrequencyequaltoorgreaterthan100Hz

and0.012timestheratedvoltagepeak-to-peak.

TheRTUshallhaveadequateprotectionagainstreversedpolarity,overcurrentand

undervoltageconditions,to preventtheRTUinternallogicfrombeingdamagedand

becomingunstablecausingmal-operation.

1.20 EnvironmentalRequirements

The RTU will be installed in control room buildings with no temperature or

humiditycontrol.TheRTUsshallbecapableofoperatingin ambienttemperature from-

5to+55degreeCwithrateoftemperaturechangeof20degreeC/hour and relativehumidityless

than95%,non-condensing.At somelocations, environmentaltemperaturemaygobelow–

5degreeCforwhichthecontractor shalltakesuitablemeasuresforsuccessfuloperationofRTU.

1.21Noiselevel

TheaudiblenoisegeneratedbytheRTUequipmentshallnotexceed50dbAone

meterfromtheenclosure.

1.22RTUSizeandExpandability

The softwareandthedatabaseshallbe sizedtoaccommodategrowthwithinthe ultimate sizing

parameters as defined in this specification for the RTU without

requiringsoftwareordatabasestructureregeneration.

ThepointcountsfortheRTUshavebeendefinedin theSchedule of works.TheRTUshall

haveadditionalwiredavailablereservecapacityoftwentypercent(20%)foreach

typeofpointsdefinedintheBOQ. Thisreservecapacityshallbeusedwithoutany

additionalhardwaresuchasI/Ocardsandterminalblocks.

The RTUs delivered shall have the capability to accommodate additional I/O

modulestoexpandtheoverallpointcountoftheRTUbyaminimumoffiftypercent (50%) i.e. 80%

more than the actual pointcount defined in the BOQ. The I/O modules

heremeansStatusInputmodule, AnaloginputmoduleandtheControl

outputmodule.Othermodules,suchasprocessormodule,racksetc.asrequiredto

meettheoverallexpandabilityrequirementdefinedaboveshallalsobesuppliedby thecontractor.

1.23RTUandSICpanels

TheContractorshallprovideRTU&SystemInterfaceCabinet(SIC)panels.TheSIC shall primarily

house all MFTs, interposing control relays and interface terminal blocks.

Generally,theSICshallbemountedadjacenttotheRTUpanel.However,in

somecases,theSICmaybemountedseparatelyatadifferentlocations.AllRTU

signalsshallbeconnectedtotheMFTs,interposingrelays,andfieldsignalsinthe

interfacecabinet.Thepanelsshallmeetthefollowingrequirements:

(a) Shallbefree-standing,floormountedandheightshallnotexceed2100 mm.

Page16of27

(b) Shallhavemaintenanceaccesstothehardwareandwiringthroughlock-

ablefullheightdoors.

(c) Shallhavetheprovisionsforbottomcableentry

(d) The safetygroundshallbe isolatedfromthesignalgroundandshallbe

connectedtothegroundnetwork.Safetygroundshallbeacopperbus bar.

Thecontractorshallconnectthepanel’ssafetygroundofto the

Employer’sgroundingnetwork.Signalgroundshallbeconnectedto the

communicationequipmentsignalground.

(e) Allpanelsshallbesuppliedwith230Vac,50Hz,single-phaseswitchand

15/5Aduplexsocketarrangementformaintenance.

(f) Allpanelsshallbeprovided withaninternal maintenance lamp, space

heatersandgaskets.

(g) Allpanels shallbeindoor, dust-proof withrodent protection, andmeet

IP41classofprotection.

(h) Thereshallbenosharpcornersoredges.Alledgesshallberoundedto preventinjury.

(i) DocumentHoldershallbeprovidedinsidethecabinettokeeptestreport,

drawing,maintenanceregisteretc.

(j) All materials used in the enclosures including cable insulation or

sheathing,wiretroughs,terminalblocks,andenclosuretrimshallbemade

offlameretardantmaterialandshallnotproducetoxicgassesunderfire conditions.

1.24Interconnections

AllcablingbetweencomponentunitsoftheRTU,RTUtointerfacecabinet,RTUto MFTsandto the

Employercontrolandrelaypanels(locatedin thesubstationcontrol room)shallbe

suppliedandinstalledbytheContractorandshallbe shownon Contractorsupplieddrawings.Plug-

typeconnectorswith captivefastenersor compressiontypeconnectorsshallbeused forall

internalinterconnections.The

connectorsshallbepolarizedtopreventimproperassembly.Eachendofintercon-

nectioncablesshallbeidentifiedbyamarkerwhichincludesthecablenumberand the identifying

number and location of each of the cable's terminations. This

informationshallmatchwiththeContractor'sdrawings.

Adequatespaceandhardwareshallbeprovidedforroutingofthefieldwiringwithin theenclosures.

Contractor wiringwithinenclosures shallbeneatlyarranged and shallnotbedirectlyfastened

totheenclosure frame. Allinternal interconnectionwiringandcablesshallbe

routedseparatelyfromfieldwiringtothe RTUterminals&powerwiring.All wiring

shallusecopperconductorsandhaveflameretardant insulation.Conductorsinmulti-

conductorcablesshallbeindividuallycolourcoded.

Page17of27

Theuseofnon-flammable, self-extinguishing, plastic wiretroughs ispermissible. Metal clamps

must have insulating inserts between the clamps and the wiring. Wiringbetweenstationaryand

movablecomponents,suchas wiringacrossdoor

hingesortocomponentsmountedonextensionslides,shallallowforfullmovement

ofthecomponentwithoutbindingorchafingofthewiring.

1.25Wiring/Cablingrequirements

Shielded(screened)cablesshallbe usedforexternalCablingfromtheRTU/SIC panels. These

externalcables (except communication cables) shall have the followingcharacteristics:

a) Allcablesshallhavestrandedcopperconductor.

b) Minimum corecross-section of2.5mm2

forPTcables,4mm2

forCT cablesand2.5

mm2

forPower& Controloutputsand1.5mm2

forDigital

Statusinputs,transducermAcurrentoutput

c) RatedvoltageUo/Uof0.6/1.1KV

d) Externalsheathingofcableshallhaveoxygenindexnot lessthan29 &temperature indexnot

less than 250. Cable sheathshall meet fire resistancetestasperIS1554Part-I.

e) Shielding,longitudinallylaidwithoverlap.

f) Dielectricwithstand2.5kVat50Hzfor5minutes

g) External markingwith manufacture's name, type, core quantity, cross-

section,andyearofmanufacture.

TheCommunicationcableshallbeofshielded,twistedpairsandofminimum0.22sq mmsize.

1.26TerminalBlocks

Terminalblocksshallbe havingprovisionfor disconnection(isolation),withfull-depth

insulatingbarriersmadefrommouldedself-extinguishing material.Terminalblocks

shallbeappropriately sizedandratedfortheelectricalcapacityofthecircuitand wireused.No

morethantwowiresshallbeconnectedto anyterminal.Eachanalog

inputsignal,digitalstatusinputanddigitaloutputsignalsshallrequiretwoterminals

perpointplusacommonshieldterminationforeachcable.

Allterminalblocksshallbesuitablyarrangedforeasyidentification ofitsusages such as CT circuits,

PT circuits, analog inputs, status inputs, control outputs,

auxiliarypowersupplycircuits,communicationsignalsetc.

TerminalBlocksfor CTcircuitsshallhavefeaturefor CTshorting(on

CTside)&disconnection(fromloadside)tofacilitatetestingbycurrentinjection.Similarly,TBs for

PTcircuitshallhavefeaturefor disconnectionto facilitatevoltageinjectionfor testing.

Page20of29

1.27RTUArchitecture

BidderhastheoptiontoofferRTUshavingfollowingarchitecturaldesign:

a) CentralizedRTUdesignwhereallI/OmodulesarehousedinRTUpanels

andcommunicatingwithmasterstationthroughcommunicationport.

b) DistributedRTUdesignwhereI/Omodulesarehousedinrespectivebay

C&Rpanels.AllthesedistributedI/O modulesshallbe connectedtoa central

processorfor further communication with master station. The

biddershallassestherequirement ofRTU/SIC panelsforsuchdesign

andsupplypanelsaccordingly.

1.28Transducer&WeatherSensorRequirements

Alltransducersshallusea48Vdcauxiliarypowersupplyasprovided fortheRTU.

Alltransducersshallhaveamaximumpowerconsumptionof10watts.

1.28.1 TransducerProtection

Theinput,outputandauxiliarycircuitsshallbe isolatedfromeachotherandearth

ground.Thetransduceroutputshallbeungroundedandshallhaveshortcircuitand

opencircuitprotection.Thetransducersshallcomplytothefollowingrequirements,

inadditiontotherequirementofIEC60688,withoutdamagetothetransducer:

(a) ElectromagneticCompatibility:IEC61000-4-3,Level1 (b)

ElectromagneticCompatibility:IEC61000-4-4,Level1

(c) ShockResistance:Minimumseverity50A,IEC68-2-27requirements

(d) VibrationStrength:Minimumseverity55/05,IEC68-2-6requirements.

(e) Input CircuitConsumption:Less than 0.5 VA for voltage and current circuits.

1.28.2 Multi-FunctionTransducers(MFTs)

Thecontractorshallprovidethemulti-functiontransducersforacquiringtherealtime

analoginputsthrough3phase4wireCT/PTscircuits.Themulti-functiontransducer

shallbedesignedfornominal110V (Ph-Phvoltage)and1A/5A(perphasecurrent). TheMFTshallbe

suitablefor 20%continuousoverloadandshallbeableto

withstanding20timesthenormalcurrentratingforaperiodonesecond.TheMFT

shallbeabletoaccepttheinputvoltagesupto120%ofthenominalvoltage.The

MFTsshallhavelowVAburden.TheseMFTsshallbemounted intheinterface cabinettobesuppliedby

thecontractor.

Mutlifunction transducers shall provide at least the following parameters as a

minimumwiththespecifiedaccuracies.

Page21of29

Sl.No.Parameters Accuracy

(i) Voltage ±0.5%

(ii) (iii)

Current

Frequency

±0.5%

± 0.2%

(iv) (v)

ActivePower/Reactivepower

Import&ExportEnergy(active/reactive)

±0.5%/ ±1%

±1%/± 2%

(vi) PowerFactor(measuringrangeshallbe0.6to1.0lag&lead)

Theparameterstobeacquiredfrommultifunctiontransducersshallbeselectable.

MFTshallprovidethe15 minutevalues(configurable15 minute/1hour)ofActive

EnergyImport,ActiveEnergyExport,ReactiveEnergyImportandReactiveEnergy Export.

Multi functiontransducers shall accept nominal -48 V DC (positive earthed) as auxiliary power

supply. Multi functiontransducer shall be provided with RS485

interfacetocommunicatewithRTUoverModbus/103protocolinmulti-dropmode.

TheMFTs shallbesuitable formounting onDINrails. TheMFT terminalsshall

acceptuptotwo2.5mm2

/4 mm2

forPT/CTcircuitterminationsasapplicable.

1.28.3 TransformerTapPositionTransducer

Theexistingtransformertappositionindicationsareoftwotypes.(i)

Variableresistancetype

(ii) Lamptype

TheContractorshallprovidesuitableresistancetappositiontransducerswhichshall

havethefollowingcharacteristics

(a) Theinputmeasuringrangesshallbefrom2to1000ohmsperstep,which

istuneableatsitewithatleast25steps.

(b) Dualoutputsignalof4to20mADC,0.5%accuracyclassasperIEC688 shall beprovided.

One outputwill be used for driving a local digital

indicator(tobeprovidedbythecontractor)andtheotherwillbeusedfor

interfacingwiththeRTU.

(c) In case of lamp type, additional resistance/potentiometer unit shall be provided to

convert the dry type contacts to a variable resistance as

definedin(a)above,suitablefortheremoteindication.

1.28.4 WeatherSensors

AllweathersensorsshallbemaintenancefreeandofIndustrystandarddesign.The

designofsensorsshallpermitcalibrationonsite.Thesensingmechanismshallbe

ruggedenoughtoavoidfrequentrecalibration.

The sensor,supportstructureshallhave built-inprotectionagainstlightning stroke/electricalsurges.

Page22of29

Theoutputofallthesensorsexceptrainfallsensorshallbe4to20mA at0-500 ohmimpedance.

Theoutputofrainfallsensorshallbeintheformofpotentialfreecontactandit’s closure shall be

accumulated (over aconfigurable time period) and reported at master station through RTU. The

sensorsshall be located in open and in the

electricalenvironmentsuchas400KVEHVoutdoorstations.Theequipmentoffered

shouldbesuitableforsatisfactoryoperationinaboveenvironment.

1.28.4.1 AirTemperatureSensor

Sensor : AirTemperatureSensor

Output : Asperspecification1.29.4

TemperatureRange : -5 oC to+60

oC

Resolution : 0.1oC

Accuracy : <0.5 oC orbetter

RadiationShield : RadiationShieldmadeofweather

resistant materialand suitable to sensor used.

1.28.4.2 RelativeHumiditySensor

Sensor : RelativeHumiditySensor


Range : 0to 99%

Resolution : 1%

Accuracy : 3%or better

RadiationShield : RadiationShieldmadeofweatherresistant

materialandsuitableto sensorused.

OperatingTemperature : -5 o

C to+60o

C

Range

Note: TheAirTemperature andRelative Humidity sensors maybesupplied ina

singleenclosureorseparately.

1.28.4.3 RainfallSensor

Sensor : TippingBucketRainGauge


Capacity/Range : Unlimited

Page23of29

Resolution : 0.2mmpertipor better

Accuracy : 4%

CollectingArea : Minimum200sq.mm

OperatingTemperature : -5 o

C to+60o

C

1.28.4.4 WeatherSensorInstallationRequirement

Theweathersensorshallbesuppliedalongwithnecessaryaccessories(e.g.tripod,

stand,clampsetc.)forinstallation/fixingofsensors,signal/powercablesetc.aspart

ofweathersensorsstation.Alltheaccessoriesshallbemadeofstainlesssteelor other suitable material

having sufficient mechanical strength and corrosion

resistancetowithstandatmospherictemperature,pressure,windspeedandrelative humidityupto

theworkingrange(MinimumtoMaximum)ofsensorsforthese parametersasdefined.

The Employer will prefer toinstall the sensors on roof top of substationorotherbuilding.

Themountingarrangementforallthesensors shallbedesignedsuitablyforinstallationontherooftop.

1.29PortableConfigurationandMaintenanceTerminal(PCMT)

ContractorshallsupplyaPortableConfigurationandmaintenanceTerminal(Laptop

PC)whichshallprovidefollowingscapabilities:

(a)RTUDatabaseconfiguration&Maintenance

(b)LocalOperatorInterface&RTUDiagnostics

(c)MasterStationandRTUsimulatorcumprotocolanalyzer

(a)RTUDatabaseconfiguration

TheRTUdatabase Configurationsoftware beingsupplied withthePCMTshall

havethefollowingfeatures

i) FullgraphicswindowsUserInterface

ii) Standardeditingcapabilitiese.g.cut,paste,copy,sortingetc.

iii)Capable ofcontrolling revisions of various RTU database files and

storingmultipleversionsofdatabasesforalltheRTUs.

iv)CapableofuploadingdatabasefromtheRTUandcomparethatwith

anotherversionofdatabasestoredinthePCMT.

v) Provide standardtemplate for database modellingrequired for I/O

modules,MFTs&IEDs,communicationsetting.

vi)Provide mapping of the individual data points acquired from one protocol

toanotherprotocolfortransmission.

Page24of29

The database configuration software shall usethe same terminology for

configurationofthevariousprotocolparametersasspecifiedinthecommunication

protocolstandardi.e.it shallbepossibletodefinetheseparametersby theuser discreetly. Also it shall

be possible to select an ASDU type to be used for

transmissionofameasurande.g.measuredvaluetobetransmittedasASDU9or ASDU11.

(b)LocalOperatorinterfaceandRTUdiagnostics

TheLocalOperatorinterfacesoftwareshallsupportoperatorinquiriesto demand

currentstatusanddatavaluesof variousRTUpoints,or anoverallsubstationsnap-

shot,orofthestatuschangebuffer.

Thelocaloperatorinterfacesoftwareshallprovidethefollowingreports:

i) Status Reports:Display ofallsubstation status indications, of alltele-

meteredvalues,andtheRTU'sstatus.

ii) EventReport:DisplayallthestoredeventsintheeventbufferoftheRTU.

iii) Print Request: Provide user interface for requesting print out of the

ReportsontheLogger

iv) Maintenanceactivities:Userinterfaceforinteractingwiththe

RTUformaintenanceactivitieslikediagnostics,databaseonlinerequests.

The RTU shall have inbuilt features for monitoring the healthiness of the RTU

modulesanddetectingthe typeoferror.Thediagnosticssoftwareshallhave

diagnosticsfortheRTU'sprocessor(s),memory,I/Oports,andanyotherfunctional

areasoftheRTU.Itshalllisttheerrorsrecordedby theRTUandprovide

troubleshootingtoolsfortheRTU.

(c) Masterstation-cum-RTUsimulator&protocolanalyzersoftwaretool

TheMasterstationandRTUsimulatorcumProtocolAnalysersoftwareshallbeused to

monitorandtesttheRTU'soperationusingthe masterstationcommunication

protocol.Itshallhavethefollowingfeatures

i) capableofemulatingboththemasterstationandtheRTUmessagesin

thecommunicationprotocols(IEC60870-5-101,104&MODBUS/103). When the

Master station and RTU simulator cum Protocol Analysersoftwarehasreceivedor

transmitteda message,itshallbe possibleto

immediately"turnaround"andtransmitorreceivearesponsemessage.

ii) capabilityofinterfacingtodigitalsideoftheRTUfortheabovepurpose.

iii) capable ofreceiving singleandrepeated messages usingthesupplied

RTUcommunicationprotocol.Eachreceivedmessageshallbechecked for validity,

including the checksum code. The messagesshall be

displayedinHEXformatorinthe‘interpretedform’asdesiredbytheuser.

Page25of29

Itshallmaintainanddisplayerrorcounterssothatthenumberoferrors

duringaperiodofunattendedtestingcanbeaccuratelydetermined.

iv) capable of formatting and transmitting, both as one-time and periodic

transmissions,anymasterstation-to-RTUcommand.

v) capableof preparingillegalmessages,suchasmessageshavinginvalid

checkcodes,fortransmission.

TheMasterstationand RTUsimulatorcumProtocolAnalysersoftwareshallalsobe

capableofpassivelymonitoringallcommunicationtrafficonachannelwithoutinter-

feringwithchanneloperation.

Channel traffic captured in the active or passive modes of operation shall be

displayed.Allfieldsofa messageshallbedisplayed.A pass/failindicationforthe

securitycheckcodeshallbeincludedwitheachcodedisplayed.

1.30 TESTING

1.30.1 RTU/SICTesting

(a) TypeTesting

A completeintegratedoffered unitmust be fully type tested toassurefullcompliancewiththe

functionalandtechnicalrequirementsoftheSpecification.Thetestingsampleshall

includeatleastoneofeachtypeofcards/modules anddevices. Photocopy of such type test

reports/certificates must be submitted along with the tender bid. The type test certificates of

prototype manufactured and tested by foreign collaborators of the tenderers at their works shall

not be acceptable for indigenously manufactured equipment.ThelistofType tests to be performed

on the RTU/SIC is mentioned in Table-2 &type test requirementsarementionedinTable-3.

Bidder shall quote price for type tests as per Schedule of type test charges so that the same can be

carried out as per option of WBSETCL. This price shall be considered for the purpose of

evaluation of bid. However, if type test reports of any type test/tests is/are not submitted by the

proposed sub-vendor carried out within last 5 (five) years, the same shall be conducted in

presence of WBSETCL representative at vendor’s cost. This cost shall be inclusive of Fooding

and lodging cost of WBSETCL representatives (min two persons).

Further, type test reports for transducers and relays shall be submitted as per relevant

standards. All weather sensors shall be calibrated as per Indian

MetrologicalDepartmentstandardsandcertificateshallbesubmittedinthisregard.

(b) RoutineTesting

Eachcompleteunitshallundergoroutinetesting.ThelistofRoutineteststo be

performedinthefactoryismentionedinTable-2.

(c) FieldTests

Page26of29

AfterRTU/SICpanelinstallationand interfacecablingwith C&Rpanelsand

communicationequipment,theContractorshallcarryoutthefield-testing.Thelistof

fieldtestsismentionedinTable-2.

(d) AvailabilityTests

Afterfieldtesting,RTU/SICshallexhibit98%availabilityduringtestperiodof500

hours.AvailabilitytestsshallbeperformedalongwithMasterstation.TheRTU/SIC shall be considered

available only when all its functionality and hardware is operational.Thenon-

availableperiodduetoexternalfactorssuchasfailureofDC powersupply,communication

linketc.,shallbetreatedashold-time&availability testdurationshallbeextendedbysuchholdtime.

Table-1:TechnicalParticularsofRTU

Sl.

no.

ItemDescription

Value

Remarks

1

Datatransmissionrate

300 to 9600 bps for

serial port &

10/100 Mbps for

Ethernetport.

Configurable

2

Communicationports

Minimum8Ports

• 2 Ethernetport for

comm.with master

stations on 104 &IEDs

on 61850 and

alsoforconfiguration. • 2 RS232ports –for

comm.with master

stationson101. • 1 Port– for RTU

configuration

&Maintenancetool • 1portforLDMSand

localLogger • 2 RS 485 ports for polling

MFTs/Energy Meters

3

Communicationprotocolwith

Masterstations

IEC60870-5-101/

104

4

CommunicationProtocolwith

LDMS

IEC60870-5-101/

104

5


MFTs

MODBUS/103

Page27of29

6


IEDs

IEC61850

7

StatusdatatransfertoMaster station

byexception

8

AnalogdatatransfertoMaster station

Normally Periodic

Formajorchange

–byexception 9

No.ofScanGroupssupported

16

10

SeparateLogicalDatabasefor

eachMasterStation

11

RTUshallbeabletocapture

contactoperations

of20msormore

duration.

12

SOEbuffersize

atleast600

events

13

Timestampingaccuracyfor

SOE

1ms

14

SupportingControlofDevices

Twostate&OLTCc

apacitors

15

DownloadingofRTU

databasefrommasterstation

Supported

16

RTUinternalclockstability

Atleast1ppm

17

NominalPowersupplyvoltage

48VDC

18

Compliancetocl.1.29.1–

TransducerProtection

Page28of29

Table-2:ListofTestsonRTU/SIC

Test

Nos.

DESCRIPTIONOFTHETEST

Typetest

Routine

test

Field

test

FUNCTIONALTESTSFORRTU/SIC

1. CheckforBOQ,Technicaldetails,Construction &Wiringas

perRTU/SICdrawings

√ √ √

2. CheckforRTUdatabase&configurationsettings √ √ √

3. Check

theoperationofallAnaloginputs,Statusinput&Controloutput

pointsofRTU/SIC

√ √ √

4. CheckoperationofallcommunicationportsofRTU √ √ √

5. Checkforcommunicationwithmasterstationsormaster

stationsimulatorforRTU/RTU

√ √ √

6. TestfordownloadingofRTUdatabasefromMasterstation √ √ √ 7. TestforRTUtimesynchronizationfromMaster √ √ √

8.

TestPowerSupplyVoltageMargin,RippleLevelsandShort

CircuitProtection

√ √ (except

short circuit

protection)

9. TestforRTUoperationwithDCpowersupplyvoltagevariation √ √

10. CheckforautorestorationofRTUonDCpowerrecoveryafter

itsfailure

√ √ √

11. TestforRTU/FRTUdiagnosticfeature √ √

12. TestforRTUSOEfeature √ √ √ 13. RTUAnalogaccuracytestforanaloginput √ √ √

14. Transduceraccuracytest √ √

15. TestforIEC60870-5-104,61850&Modbusprotocol

implemented

√ √

16. TestforRTUinternalClockstability √ √ 17. TestforRTUNoiselevelmeasurement √ 18. TestforControlSecurityandSafetyforControloutputs √ √

19.

Otherfunctionaltestsaspertechnicalspecification

requirements

√ √

20.

Endtoendtest(betweenRTU&Masterstation)forall

I/Opoints

√

EMI/EMCIMMUNITYTESTSFORRTU/FRTU 21. SurgeImmunityTestasperIEC60870-2-1 √

22. ElectricalFastTransientBurstTestasperIEC-60870-2-1 √ 23. DampedOscillatoryWaveTestasperIEC60870-2-1 √ 24. ElectrostaticDischargetestasperIEC60870-2-1 √

25. RadiatedElectromagneticFieldTestasperIEC60870-2-1 √ 26. DampedOscillatorymagneticFieldTestasperIEC-60870-2-1 √

27. PowerFrequencymagneticFieldTestasperIEC-60870-2-1 √ INSULATION TESTFORRTU/FRTU

28. PowerfrequencyvoltagewithstandTestasperIEC60870-2-1 √

29. 1.2/50µsImpulsevoltagewithstandTestasperIEC60870-2-

1

√

30. Insulationresistancetest √ ENVIRONMENTAL TESTFORRTU/FRTU

31. DryheattestasperIEC60068-2-2/2-3 √

32. Dampheat testasperIEC60068-2-78 √

33. ColdTestasperIEC60068-2-1 √

Note:TestlevelsforabovetypetestsareelaboratedinTable3

Page29of27

Table-3:RTUTypeTestRequirements

Test

Nos

.

TestName EUT

Status

Test

Level

PowerSupply

Points

I/O

Points

Passing

Criteria CM DM CM

1 SurgeImmunityTest ON Level

3

2kV 1kV 2kV A

2 ElectricalFast

TransientBurstTest

ON Level

3

2KV - 1kV A

3 DampedOscillatory

WaveTest

ON Level

3

2.5kV 1kV 2.5kV A

4 Electrostatic

DischargeTest

ON Level

3

+/-6 kVinContactdischarge

mode or+/-8kVinAir

dischargemode

A

5 Radiated

ElectromagneticField

Test

ON Level

3

10V/melectricfieldstrength A

6 DampedOscillatory

MagneticFieldTest

ON Level

3

30A/m at1MHzofmagnetic

fieldstrength

A

7 Powerfrequency

magneticfield

ON Level

3

30A/mofmagneticfieldstrength

(Continuousdurationsinewave)

A

8 Powerfrequency

voltagewithstand

OFF - 1KVrmsfor1 minute Nobreak

downor

flashover

shall

occur 9 1.2/50µsimpulse

voltagewithstand

OFF -

2kVp

Nobreak

downor

flashover

shall

occur 11 InsulationResistance

Test

OFF - Measure Insulation resistance

using500VDC Meggerbefore

&after Power Freq&Impulse

voltagewithstandtests

Asper

manufact

urer

standard 12 Dryheattest ON - Continuous operation at 550 C

for16hrs 0

13 Dampheattest ON - at95%RHand400Cfor16hrs 0 14 Coldtest ON - Continuousoperationat00Cfor

96hrs 0

Note:-

1. EUT -EquipmentUnderTest

2. CM -CommonMode;DM-Differentialmode

3. I/OpintsdonotincludeCommunicationports

4. PassingCriteria

0-nofailure:normalperformancewithinthespecifiedlimits

A:minorfailure:temporarydegradationorlossoffunctionorperformancewhich isself-recoverable

5. Functionaltestasperthesl.nos.1-18ofTable-2shallalsobedoneduringtype testing.

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TECHNICAL SPECIFICATION OFRTU · Page5of27 ALSTOM make S900 RTU, (iii) existing Net Work Management System(NMS)and/or new NMS of Control Centre (iv) Fiber Optic terminal equipment