Sepam - HV/MV Protection and control units (ENG) - Trinet

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Restricted earth fault protectionANSI codefunction n°64REFF641 for restricted earth faultprotection winding 1F651 for restricted earth faultprotection winding 2F661 for restricted earth faultprotection winding 3Curve4Io - Ineutral(x In)Operation3Restricted earth fault protection detects phase toearth faults in earthed neutral three-phase windings.I12Iso set point zoneI2I3Sepam 20000.81I neutral0.050Io (x In)0 1 2 3The function is based on the comparison of residual–> –> –> –>current Io (Io = I1 + I2 + I3) and neutral current Ineutral.It is activated when the Io - Ineutral differenceis greater than the operation set point.This set point is defined based on the minimum setpoint Iso and also by a percentage-based trippingcurve with a slope of 1.05 and restraint current Iroin normal conditions (see curve).–> –> –>Iro = I1 + I2 + I3In: phase CT rating.The protection sensitivity is determined by the phasecurrent sensors with a minimum set point of 5% In.The protected zone is between the phase CTs andthe neutral point.External fault stabilityWhen an external fault is detected, the restraint–> –> –> –>current becomes 2* (I1 + I2 + I3) + Io/3 .This makes it possible to make the protectioninsensitive to current transformer saturation withoutdisabling it.Block diagram2 A CSH core bal. CT30 A CSH core bal. CTCT + CSH30SW1IneutralIdo = I1 + I2 + I3 – IneutralIdo > IsoIdo> 105 %Iro&F641/1F651/1F661/1Iro = I1 + I2 + I3I1 + I2 + I3externalfaultdetectionIro = 2* I1 + I2 + I3 +Ineutral32/66 Protection functions
Commissioning, settingNeutral current is measured:c by CSH sensor,c by a 1A or 5A current transformer associated with aCSH30.Residual current is measured by the internal vectorsum of the 3 phase currents.Check:c the connections,c the position of microswitch SW1:c the position of microswitch SW2 for the useof 1A or 5A CT or CSP sensor,c general parameters in the status menu.Set the Iso current:c Iso is set as an rms value, in amps or kiloamps.The 999 kA setting may be used to inhibit theprotection: all the outputs are set to zero.SensorsRestricted earth fault protection F641 is relatedto the currents connected to the following connectors:current sensor connectorI1, I2, I3 1A or 5A CT 2BCSP2L1, 2L2, 2L3Ineutral CSH 2AIo CT+CSH30 2ARestricted earth fault protection F651 is relatedto the currents connected to the following connectors:current sensor connectorI1’, I2’, I3’ 1A or 5A CT 3BCSP3L1, 3L2, 3L3Ineutral CSH 3AIo’ CT+CSH30 3ARestricted earth fault protection F651 is relatedto the currents connected to the following connectors:current sensor connectorI1”, I2”, I3” 1A or 5A CT 4BCSP4L1, 4L2, 4L3Ineutral CSH 4AIo” CT+CSH30 4AIn order to guarantee the accuracy and stability of the protection, the currenttransformers must be of the 5P20 type.The power rating should be chosen so that the wiring resistance is less than therated load of the current transformer, i.e.:VA CT> R wIn 2VA CT: current transformer rated loadR w: wiring resistanceIn: CT secondary rated currentIn those conditions, correct operation is ensured in most applications.To size class X CTs, the following rules must be followed:c restricted earth fault protection on the transformer secondary circuit:external fault stability is ensured if the phase CT saturation current is more than2.4 times the phase-to-earth fault current and 1.6 times the 3-phase fault current.Internal fault sensitivity is ensured if the neutral CT saturation current is more than2 times the phase-to-earth fault current.c restricted earth fault protection on the transformer primary circuit:external fault stability is ensured if the phase CT saturation current is more than2.4 times the protected transformer phase-to-earth fault current.Internal fault sensitivity is ensured if the neutral CT saturation current is more than2 times the protected transformer phase-to-earth fault current.c restricted earth fault protection for generators:external fault stability is ensured if the phase CT saturation current is more than 2times the generator rated current.Internal fault sensitivity is ensured if the neutral CT saturation current is more than2 times the generator phase-to-earth fault current.CharacteristicsIso set pointrangeresolutionaccuracy (1)0.05 In to 0.8 In for In u 20 A0.1 In to 0.8 In for In < 20A1 A or 1 digit±5% or 5% Indrop out/pick-up ratio (93 ±5)%minimum return varianceIo restraint-Ineutral/Iofixed value 1.05accuracy (1) ±2%characteristic timesoperation timememory timefault recognition timereset timeoutputs availaible for program logicmin. 0.4% In< 40 ms< 25 ms< 25 ms< 40 msinstantaneous F641/1, F651/1, F661/1remote reading, remote setting* (1)function code F64, F65, F66identification number 164h, 65h and 66hparameters Iso set point unit: 1 A(1)in reference conditions (IEC 60255-13).(1)the data formats are defined in the manuals that describe each communication protocol.Protection functions2/67
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Protectionand controlSepam rangeSep
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ContentsMetering functionschapter /
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Maximum demand phase currentsOperat
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Residual currentOperationThis opera
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FrequencyOperationThis function giv
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%32.521.510.5%0.10.050.0100 0.1000.
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Accumulated real/reactive energyOpe
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Residual voltageOperationThis funct
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Cumulative breaking current and num
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Differential current and through cu
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ContentsProtection functionschapter
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Commissioning, settingCheck:c the c
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Commissioning, settingCheck:c the c
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Measurement of phase shift with res
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Example of useWhen the current sens
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Commissioning, settingEarth fault c
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Directional earth faultANSI code 67
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Page 37 and 38: Commissioning, settingEarth fault c
Page 39 and 40: Resistive earth faultANSI codefunct
Page 41 and 42: Thermal overloadANSI code 49functio
Page 43 and 44: Cold curvesI/Ib 1.00 1.05 1.10 1.15
Page 45 and 46: Cold curvesI/Ib 4.80 5.00 5.50 6.00
Page 47 and 48: Hot curvesI/Ib 1.00 1.05 1.10 1.15
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Page 51 and 52: CharacteristicscurvesettingIs set p
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Page 55 and 56: Block diagramk1>NstartF421/3I1I2I3I
Page 57 and 58: Phase undercurrentANSI code 37Block
Page 59 and 60: 0,05IbIsF441/1F441/2F441/3F441/4F44
Page 61 and 62: CharacteristicsUs set pointsettinga
Page 63 and 64: Positive sequence undervoltageand p
Page 65 and 66: Neutral voltage displacementANSI co
Page 67 and 68: Rate of change of frequency protect
Page 69 and 70: c Low set point time delayFor good
Page 71 and 72: OverfrequencyANSI code 81function n
Page 73 and 74: Commissioning, settingCheck:c the c
Page 79 and 80: CharacteristicsdUs set pointrangere
Page 81 and 82: Percentage-based single-phase overc
Page 83 and 84: PerformanceThe performance of this
Page 85: Block diagramF621/1> 5,5 In&I1I1’
Page 89 and 90: AppendixContentschapter / pageappen
Page 91 and 92: Another practical method: the chart
Page 93 and 94: Very inverse time curve VIT or LTIt
Page 95 and 96: Ultra inverse time curve UITt (s)1
Page 97 and 98: General parameter settingsThe gener
Page 99 and 100: Protectionand controlSepam rangePro
Page 101 and 102: Control and monitoring functionsCon
Page 103 and 104: Open / close controlUseThis functio
Page 105 and 106: Special featuresc Input I15 (extern
Page 115 and 116: Open / close matching supervisionAp
Page 117 and 118: Block diagram: substation - busbar
Page 119 and 120: Operation counterphase fault trip c
Page 121 and 122: Load sheddingBlock diagramlogic inp
Page 123 and 124: IntertrippingBlock diagramprotectio
Page 125 and 126: ApplicationThis function provides r
Page 127 and 128: RecloserApplicationDesigned essenti
Page 129 and 130: IndicationsDisplay messagesList of
Page 131 and 132: De-excitationBlock diagramde-excita
Page 133 and 134: OperationA closing request made loc
Page 135 and 136: Disturbance recording triggeringBlo
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Open / close controlcapacitor bank
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Capacitor controlBlock diagraminten
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ApplicationThis function may be use
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Capacitor unbalanceBlock diagram"RE
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VT supervisionApplicationThis funct
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Remote control and remote annunciat
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Function set-up summary chart (cont
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InstallationContentschapter / pagei
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InstallationEquipment identificatio
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Optional accessoriesTSM 2001 pocket
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Sepam 2000 componentsslot 6 5 4 3 2
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CCA 660 or CCA 650connectorc Open t
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Accessories for CSPcurrent sensorsA
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Use of ACE 907 and AC 908c Connect
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InstallationUse and connection of s
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Connection of CSH 120 andCSH 200 co
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Connectionto CT with 1 A secondaryc
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Characteristicsc Accuracy:v amplitu
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Connection of 2 VTsThis arrangement
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InstallationConnection of Pt100 ter
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InstallationConnection of the Jbus/
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Use - commissioningDescription/useY
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Use - commissioningDescription/use
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Use - commissioningUse (current ope
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Use - commissioningCommissioningChe
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Use - commissioningCommissioning (c
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Use - commissioningMaintenance (con
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Use - commissioningSepam 2000 ident
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Use - commissioningPasswordUse of t
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General characteristicsCharacterist
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General characteristicsCharacterist
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General characteristicsQualificatio
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General characteristicsPerformance
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General characteristicsEffects of t
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General characteristicsEffects of t
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General characteristicsDependabilit
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Appendix 1: reference documentsStan
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Testing - setting record sheetsComm
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Program logic parameters (customize
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SETTING RECORD SHEETProject: ......
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Sepam 2000 Substationfunction ident
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Status menu parameters (cont’d)me
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Sepam 2000 Transformerfunction iden
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Status menu parameters (cont’d)Se
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Sepam 2000 Generatorfunction identi
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InstallationAssembly and wiring (co
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InstallationConnection of current i
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InstallationConnection of analog in
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InstallationConnection of power sup
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Notes1/16 Installation - Use - Shee
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Use - commissioningDescription / us
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2/14 Installation - Use - Sheets
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Notes2/16 Installation - Use - Shee
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InstallationAssembly and wiring (co
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InstallationConnection of current i
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InstallationUse of the CSH 30 core
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InstallationConnection of the Jbus
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InstallationChecking prior to commi
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2/18 Use - commissioning
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TestingGeneral informationProcedure
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TestingGeneral information (cont'd)
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TestingCabling testing by current i
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ITestingCabling testing by current
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ITestingCabling testing by current
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SETTING RECORD SHEETSite : ........
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TEST SHEET Sepam 2000Site : .......
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InstallationUse conditionsInstallat
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InstallationAssembly and wiringDime
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InstallationUse and connection of c
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InstallationUse and connection of C
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InstallationConnection of power sup
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InstallationReplacement of Sepam 20
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Use - commissioningPasswordThe user
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General characteristicsSepam 2000 l
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General characteristicsDependabilit
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Testingchapitre / pagetestinggenera
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Inhibition of outputsand test param
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Other diagram:This diagram may be u
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TestingCabling testing by current i
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TestingRestricted earth fault prote
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TEST SHEET Sepam 2000Project: .....
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Electrical testsAimThe aim of these
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Testing of output effects in rated
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Effects of the environment on the e
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Appendix 1: reference documentsStan
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Contentspagepresentation 2connectio
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ImplementationSetting the communica
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Use of remote control bitsThe remot
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Events zoneThe events zone is a tab
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Test zoneThe test zone is a 16-word
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Measurements x 1 zoneThe measuremen
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Compact zoneThe compact zone contai
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Configuration zoneThe configuration
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Jbus data encoding (logical)Format
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I onA V/Hz W/ϕ Wh clear alarm rese
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Description of event codingAn event
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I onO offA V/Hz W/ϕ Wh clear alarm
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Sepam 2000 internal eventsThe inter
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switching of the setting terminal t
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Access to remote settings (cont’d
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Description of settingsData typeThe
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Reading of phase overcurrent protec
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If the master requests more exchang
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eading of block n° 79h of the reco
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Request framethis codeis used to se
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Reading of N words:function 3 or 4T
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Reading of diagnosiscounters: funct
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ExampleForcing of words 0800h to 08
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Protection function testsContentANS
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Measurement and testing methodGener
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Checking of IDMT set point and time
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Voltage restrained overcurrent prot
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Earth fault protectionANSI code 50N
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Percentage-based single-phase overc
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c testing of TOnce the protection a
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examplec angle θo = 0° (see figur
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Checking of protection disengaging
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Setting Adjust = None does not take
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Cold curvesI/Ib 1.85 1.90 1.95 2.00
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Hot curves:t/T1 = f(OL, I/Ib)The fo
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Sensitive earth fault protectionANS
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Ii (% Ib) K10 99.9515 54.5020 35.44
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Testing of number of consecutive co
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Phase undercurrent protectionANSI c
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Remanent undervoltage protectionANS
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Phase-to-phase overvoltage protecti
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Testing by injection into input A1-
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Underfrequency protectionANSI code8
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Rate of change of frequency protect
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Testing Ps set pointv using single-
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Testing Ps set pointv using single-
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Testing of Qs set pointv using sing
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Resistance values as afunction of t
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It/InIs/In0.05 0.1 0.15 0.2 0.25 0.
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Checking of the slopeThe slope can
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Protection against circuit breaker
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Testing equipmentMeasurement and te
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Test wiring diagram (cont'd)B2: thr
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Test wiring diagram (cont'd)B8: cur
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Test wiring diagram (cont'd)B10: si
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Test wiring diagram (cont'd)B12: un
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Test wiring diagram (cont'd)B14: re
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Test wiring diagram (cont'd)B16 : s
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TEST SHEET Sepam 2000Project : ....
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Program logic parameters (customize
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Sepam 2000 Busbarsfunction identifi
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Sepam 2000 Moteurfunction identific
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Sepam 2000 Capacitorfunction identi
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Sepam 2000 Generator (cont’d)func
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IDMT protection curvesStandard inve
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IDMT protection curves (cont'd)Extr
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Negative sequence/unbalance protect
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Schneider Electric3140746A-EART.757
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Sepam - HV/MV Protection and control units (ENG) - Trinet

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