ABB ret650 - Page 15

Technical data........................................................................... 238
Rate-of-change frequency protection SAPFRC .............................238
Identification.............................................................................. 239
Functionality.............................................................................. 239
Function block........................................................................... 239
Signals.......................................................................................239
Settings......................................................................................240
Operation principle.................................................................... 240
Measurement principle......................................................... 240
Time delay............................................................................240
Design.................................................................................. 241
Technical data........................................................................... 242
Section 11 Secondary system supervision.....................................243
Fuse failure supervision SDDRFUF............................................... 243
Identification.............................................................................. 243
Functionality.............................................................................. 243
Function block........................................................................... 244
Signals.......................................................................................244
Settings......................................................................................245
Monitored data...........................................................................246
Operation principle.................................................................... 246
Zero and negative sequence detection................................ 246
Delta current and delta voltage detection.............................247
Dead line detection...............................................................250
Main logic............................................................................. 250
Technical data........................................................................... 254
Breaker close/trip circuit monitoring TCSSCBR............................. 254
Identification.............................................................................. 254
Functionality.............................................................................. 254
Function block........................................................................... 254
Signals.......................................................................................255
Settings......................................................................................255
Operation principle.................................................................... 255
Technical data........................................................................... 256
Section 12 Control..........................................................................257
Apparatus control........................................................................... 257
Functionality.............................................................................. 257
Switch controller SCSWI........................................................... 257
Identification ........................................................................ 257
Functionality......................................................................... 257
Function block...................................................................... 258
Signals..................................................................................258
Table of contents
9
Technical manual