5-174 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALFLEXLOGIC CHAPTER 5: SETTINGS5ELEMENT:Directionalcomparisonunblocking scheme(DCUB)DCUB TX1DCUB TX2DCUB TX3DCUB TX4DCUB TRIP ADCUB TRIP BDCUB TRIP CDCUB TRIP 3PDCUB OPDirectional comparison unblocking scheme asserts transmit bit 1Directional comparison unblocking scheme asserts transmit bit 2Directional comparison unblocking scheme asserts transmit bit 3Directional comparison unblocking scheme asserts transmit bit 4Directional comparison unblocking scheme has operated to trip phase ADirectional comparison unblocking scheme has operated to trip phase BDirectional comparison unblocking scheme has operated to trip phase CDirectional comparison unblocking scheme has operated to trip all phasesDirectional comparison unblocking scheme has operatedELEMENT:Digital elementsDig Element 1 PKPDig Element 1 OPDig Element 1 DPODigital Element 1 is picked upDigital Element 1 is operatedDigital Element 1 is dropped outDig Element 2 to 48 Same set of operands as shown for Dig Element 1ELEMENT:Blocking schemeDIR BLOCK TX INITDIR BLOCK TX1 STOPDIR BLOCK TX2 STOPDIR BLOCK TX3 STOPDIR BLOCK TX4 STOPDIR BLOCK TRIP ADIR BLOCK TRIP BDIR BLOCK TRIP CDIR BLOCK TRIP 3PDIR BLOCK OPDirectional blocking signal is initiatedDirectional blocking scheme de-asserts transmit bit no. 1Directional blocking scheme de-asserts transmit bit no. 2Directional blocking scheme de-asserts transmit bit no. 3Directional blocking scheme de-asserts transmit bit no. 4Directional blocking scheme has operated to trip phase ADirectional blocking scheme has operated to trip phase BDirectional blocking scheme has operated to trip phase CDirectional blocking scheme has tripped all 3 phasesDirectional blocking scheme has operatedELEMENT:Blocking 1 schemeDIR BLOCK1 TX INITDIR BLOCK1 TX1 STOPDIR BLOCK1 TX2 STOPDIR BLOCK1 TX3 STOPDIR BLOCK1 TX4 STOPDIR BLOCK1 TRIP ADIR BLOCK1 TRIP BDIR BLOCK1 TRIP CDIR BLOCK1 TRIP 3PDIR BLOCK1 OPDirectional blocking1 signal is initiatedDirectional blocking1 scheme de-asserts transmit bit no. 1Directional blocking1 scheme de-asserts transmit bit no. 2Directional blocking1 scheme de-asserts transmit bit no. 3Directional blocking1 scheme de-asserts transmit bit no. 4Directional blocking1 scheme has operated to trip phase ADirectional blocking1 scheme has operated to trip phase BDirectional blocking1 scheme has operated to trip phase CDirectional blocking1 scheme has tripped all 3 phasesDirectional blocking1 scheme has operatedELEMENT:Sensitive directionalpowerDIR POWER 1 STG1 PKPDIR POWER 1 STG2 PKPDIR POWER 1 STG1 DPODIR POWER 1 STG2 DPODIR POWER 1 STG1 OPDIR POWER 1 STG2 OPDIR POWER 1 PKPDIR POWER 1 DPODIR POWER 1 OPStage 1 of the directional power element 1 has picked upStage 2 of the directional power element 1 has picked upStage 1 of the directional power element 1 has dropped outStage 2 of the directional power element 1 has dropped outStage 1 of the directional power element 1 has operatedStage 2 of the directional power element 1 has operatedThe directional power element has picked upThe directional power element has dropped outThe directional power element has operatedDIR POWER 2 Same set of operands as DIR POWER 1ELEMENT:DUTT(Direct underreachtransfer trip)DUTT TX1DUTT TX2DUTT TX3DUTT TX4DUTT TRIP ADUTT TRIP BDUTT TRIP CDUTT TRIP 3PDUTT OPDirect under-reaching transfer trip asserts transmit bit 1Direct under-reaching transfer trip asserts transmit bit 2Direct under-reaching transfer trip asserts transmit bit 3Direct under-reaching transfer trip asserts transmit bit 4Direct under-reaching transfer trip has operated to trip phase ADirect under-reaching transfer trip has operated to trip phase BDirect under-reaching transfer trip has operated to trip phase CDirect under-reaching transfer trip has operated to trip all three phasesDirect under-reaching transfer trip has operatedELEMENT:Fault locatorTAP-LOCAL FAULT Fault is located between local terminal and tap point (3-terminal only)ELEMENT:Frequency rate ofchangeFREQ RATE 1 PKPFREQ RATE 1 DPOFREQ RATE 1 OPThe frequency rate of change 1 element has picked upThe frequency rate of change 1 element has dropped outThe frequency rate of change 1 element has operatedFREQ RATE 2 to 4 Same set of operands as shown for FREQ RATE 1ELEMENT:FlexElementsFxE 1 PKPFxE 1 OPFxE 1 DPOFlexElement 1 has picked upFlexElement 1 has operatedFlexElement 1 has dropped outFxE 2 to 8 Same set of operands as shown for FxE 1Operand type Operand syntax Operand description
