12.3.4 SignalsTable 342:ZCWSPSCH (85) Input signalsName Type Default DescriptionV3P GROUPSIGNAL- Three phase group signal for voltage inputsBLOCK BOOLEAN 0 Block of functionIFWD BOOLEAN 0 A signal that indicates a forward fault has been detectedand will block tripping if there was a pre-existing reversefault condition (IREV)IREV BOOLEAN 0 A signal that indicates a reverse fault has been detectedand activates current reverasl logicWEIBLK1 BOOLEAN 0 Block of WEI logicWEIBLK2 BOOLEAN 0 Block of WEI logic due to operation of other protectionsthat would effect a pilot trip or the detection of reversefaults that will be tripped by an external deviceBLKZ BOOLEAN 0 Block of trip from WEI logic through the loss of voltage(fuse-failure) functionCBOPEN BOOLEAN 0 Block of trip from WEI logic by an open breakerCRL BOOLEAN 0 POTT or Unblock carrier receive for WEI logicTable 343:ZCWSPSCH (85) Output signalsName Type DescriptionIRVL BOOLEAN Operation of current reversal logicTRWEI BOOLEAN Trip of WEI logicTRWEI_A BOOLEAN Trip of WEI logic in phase ATRWEI_B BOOLEAN Trip of WEI logic in phase BTRWEI_C BOOLEAN Trip of WEI logic in phase CECHO BOOLEAN A signal that indicates channel start (CS) by WEI logic12.3.5 SettingsTable 344:ZCWSPSCH (85) Group settings (basic)Name Values (Range) Unit Step Default DescriptionCurrRev DisabledEnabled- - Disabled Operating mode of Current Reversal LogictPickUpRev 0.000 - 60.000 s 0.001 0.020 Pickup time for current reversal logictDelayRev 0.000 - 60.000 s 0.001 0.060 Time Delay to prevent Carrier send and localtripTable continues on next page1MRK 506 335-UUS A Section 12Scheme communication509Technical manual
