Technical data........................................................................... 238Rate-of-change frequency protection SAPFRC .............................238Identification.............................................................................. 239Functionality.............................................................................. 239Function block........................................................................... 239Signals.......................................................................................239Settings......................................................................................240Operation principle.................................................................... 240Measurement principle......................................................... 240Time delay............................................................................240Design.................................................................................. 241Technical data........................................................................... 242Section 11 Secondary system supervision.....................................243Fuse failure supervision SDDRFUF............................................... 243Identification.............................................................................. 243Functionality.............................................................................. 243Function block........................................................................... 244Signals.......................................................................................244Settings......................................................................................245Monitored data...........................................................................246Operation principle.................................................................... 246Zero and negative sequence detection................................ 246Delta current and delta voltage detection.............................247Dead line detection...............................................................250Main logic............................................................................. 250Technical data........................................................................... 254Breaker close/trip circuit monitoring TCSSCBR............................. 254Identification.............................................................................. 254Functionality.............................................................................. 254Function block........................................................................... 254Signals.......................................................................................255Settings......................................................................................255Operation principle.................................................................... 255Technical data........................................................................... 256Section 12 Control..........................................................................257Apparatus control........................................................................... 257Functionality.............................................................................. 257Switch controller SCSWI........................................................... 257Identification ........................................................................ 257Functionality......................................................................... 257Function block...................................................................... 258Signals..................................................................................258Table of contents9Technical manual
