Eaton Cutler-Hammer Digitrip RMS 910 Instructions Manual

Also see for Digitrip RMS 910: Instructions Instructional Leaflet Instruction leaflet

I.L.29-889APage275.4Both RemoteMaster ComputerandAEMWhendesired,DigitripRMS910TripUnitscancommuni-catewithbothanAssembliesElectronic Monitor(AEM-II)andaremote master computer(IBM PC compatiblewithCONIcardas noted inSec.5.2).Theconnections inthenetworkarethenmadebytwistedpairsofwiresasshowninFig.11.3.5.6Information Communicatedby Digitrip RMS910TheDigitrip RMS910TripUnitutilizestheCutler-Ham-merInc.INCOM®serializedprotocoltosendoutcodedmessages.Thecoded messagescanbe interpreted bysystemlevelsoftware,suchastheCutler-HammerInc.IMPACC®system,todisplayany oftheinformationthatislistedinTable5:Informationavailableforremotedisplayincludes:5.5INCOM® NetworkInterconnectionsINCOM® sends burstsofdata ona92to115.2kHzcar-rierat ratesupto9600baud,overtwistedpairconduc-tors,tointerconnectthemanydevices comprising thenetwork.Recommendedcablespecifications:•Cutler-HammerInc.cable catalog#IMPCABLE,Style#2A95705G01• Belden 9463 cable family•Identical CommscopeorQuabbin cablesTheseburstsofdatacan becapturedandusedin a vari-etyof waysdependingupon the mannerinwhichthemaster computersoftwareprogramis written.Forexam-ple,the data for theindividualphasecurrentvaluesareavailableonthe network,but thesoftwaremustselecttheappropriatedata,decode and display it in a useful man-ner.Followinganover-currenttrip operation,thesequenceofcoded datavariesslightly. Thecause oftrip,andthevalueand phase(orground)current,responsiblefor the tripareavailableonthe network.Ifa TRIP wereinitiated duetoa Short-Time Delay over-current condi-tion,for example,the coded message for “SDT”would betransmitted by theTrip Unit. Once the message isreceivedand interpreted bythesoftware, the valueofcurrentcanberetrieved andtheapplicable phase can beidentified,along with the timeoftrip and thevalueofthetrip event counter.Aslongascontrol power remainsavailable to thePower/RelayModule,thereason fortrip,andthe valuesofcurrent in the otherphases,includingneutraland/or groundatthe timeoftrip,as well as thevaluesofeachprotectionsetting,also remainavailableuntil theTripUnit is reset.Effectiveutilizationofthe infor-mationavailable over the INCOM® network requiresappropriately designed software,such as theCutler-Hammer Inc. IMPACC® system,or your own custom soft-ware system.For detailed instructions about interconnecting devicesover an INCOM® network, see IMPACC® wiring specifi-cation T.D. 17-513.•Statusofcircuitbreaker:“Closed”,“Open”or“Tripped”•AllProtectionSettings (see Section3)•AllInformationdisplayedintheTripUnit window:•PhaseandGroundorNeutralcurrentvalues•PowerandEnergy Demandparametervalues• Coded MessagesregardingstatusofthecircuitRefertotheIMPACC® System Communications refer-enceprogrammingguide(seeSection6)formore infor-mation.The information available through INCOM®isactuallygreaterthanthat availablelocally throughtheTripUnit display itself.Forexample,withINCOM®,onecan viewthe timeoftripeventand trip event counterremotely,eventhough these valuesare notavailablefordisplaylocallyintheTripUnit window.5.7Waveform CaptureThe Digitrip RMS910 can respondtoacommandfrom aremotemaster toperform awaveformcaptureofphasecurrents[lA],[lB]and[lc].Atotalof58data points perphase per cycle is capturedandcanbe sentto ahostcomputer. From this data, parameterssuchas[THD],individual harmonicscontentand waveform displayscanbefabricated.There is atimerinthe Digitripunitthat will limittheacceptanceofa“waveformcapture”software commandtoonceasecond. SeeI.L.17-384Appendix U.onIMPACCSystem Communications onwaveformcapturecommands.5.8 RemoteClosing and Tripping of Circuit BreakersThe Digitrip RMS 910Trip Unit can respond to com-mands from the remotemaster computer to‘TRIP”thecircuit breaker remotely;and furthermore,ifthe circuitbreaker has been equipped with the applicable optionalelectrical operator or spring release feature,the DigitripRMS 910 Trip Unit can respond tocommands from theremote master computer to “CLOSE”the circuit breakerremotely.The CLOSE command causes the “Communi-WLT-NEffective May 1997