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GENERATION & NETWORKTransformer Protection IED

NPT916

• Predefinedorcustomconnectiongroupselection

• 2ndand5thharmonicblocking

• Automaticverificationofconnectiongroupandnominalvaluesettings

• Throughfaultandoverloadingstatisticsforpreventivemaintenance

The optimal management of electrical power systems is based inparticular on the reliability, availability and communication skills ofprotection,measurementandautomationdevices.

NPT916isatransformerprotectionIEDwithsophisticatedandeasytousedifferentialprotectionfunction.TheNPT916transformerprotectionIEDprovidesforbothlowandhighsideovercurrent,earth-fault,negativesequenceand two independent restrictedearth-fault instances.TheNPT916canbeappliedforgeneratorandmotordifferentialprotectionaswell.

TheNPT916communicatesusingvariousprotocolsincludingIEC61850substationcommunicationstandard.

ANSI CODES

A934C

CHARACTERISTICSProtection functions

• 2windingtransformerdifferential[87T]• Lowimpedancerestrictedearthfault/cableenddifferential[87N]

• Transformerthermaloverload[49T]• Three-phaseovercurrent,4stagesINST,DTorIDMT[50/51]

• Earth-fault(sensitive),4stagesINST,DTorIDMT[50/51N(S)]

• Harmonicovercurrent/inrushblocking,4stagesINST,DTorIDMT[50H/51H/68H]

• Currentunbalance/brokenconductor,4stagesINST,DTorIDMT[46R/46L/46]

• Breakerfailureprotection[50BF/52BF]• Arcprotection(option)[50ARC]

Measuring and monitoring• Phaseandresidualcurrents(IL1,IL2,IL3,I01,I02)• CurrentTHDandharmonics(upto31st)• Frequency(f)• Circuitbreakerwear(CBW)• Disturbancerecorder(3.2kHz)• Currenttransformersupervision(CTS),2instances• Tripcircuitsupervision[74TC]

Control• Controllableobjects:5• 8settinggroups

Hardware• Currentinputs:10• Digitalinputs:3(standard)• Outputrelays:5+1(standard)

Options (2 slots)• Digitalinputsoptional:+8percard• Digitaloutputsoptional:+5percard(2cardsmax.)• Arcprotection(12sensors+2xHSO+BI)• 2xmAinput+6-8xRTDinput(2cardsmax.)• Communicationmedia(specifiedbelow)

Event recording• Non-volatiledisturbancerecords:100• Non-volatileeventrecords:10000

Communication media• RJ45Ethernet100Mb(frontstandard)• DoubleLCEthernet100Mb(option)• RS232+serialfibrePP/PG/GP/GG(option)

Communication protocols standard• IEC61850• IEC60870-5-103/101/104• ModbusRTU,ModbusTCP/IP• DNP3.0,DNP3.0overTCP/IP• SPA

Case• H,W,Dwithoutterminal177x127x174mm• H,W,Dwithterminal177x127x189mm(casingheight4U,width¼rack,depth210mm)

• H,Woffrontplate177x127mm• H,Wofcutout160x106mm

SMART9 - integrated softwareOur user friendly SMART9 (Setting, Measurement,Analysis,Recording,Time-saving)configurationsoftwarehelpstheusergetthebestfromNP900seriesrelays.