ABB REL 501-C1 2.5 Technical Reference Manual page 7

Setting parameters, zone 5 .......................................................... 67
Setting parameters, directional measuring element ..................... 69
Technical data .............................................................................. 69
Automatic switch onto fault logic (SOTF)........................................... 71
Application .................................................................................... 71
Functionality ................................................................................. 71
Function block .............................................................................. 71
Logic diagram ............................................................................... 72
Input and output signals ............................................................... 72
Setting parameters ....................................................................... 72
Technical data .............................................................................. 73
Local acceleration logic (ZCLC)......................................................... 74
Application .................................................................................... 74
Functionality ................................................................................. 74
Function block .............................................................................. 74
Logic diagram ............................................................................... 75
Input and output signals ............................................................... 75
Setting parameters ....................................................................... 76
General fault criteria (GFC) ............................................................... 77
Application .................................................................................... 77
Functionality ................................................................................. 77
Function block .............................................................................. 79
Logic diagram ............................................................................... 79
Input and output signals ............................................................... 83
Setting parameters ....................................................................... 83
Technical data .............................................................................. 86
Power swing detection (PSD) ............................................................ 87
Application .................................................................................... 87
Functionality ................................................................................. 87
Function block .............................................................................. 88
Logic diagram ............................................................................... 89
Input and output signals ............................................................... 90
Setting parameters ....................................................................... 90
Technical data .............................................................................. 91
Scheme communication logic (ZCOM) ........................................... 93
Application .................................................................................... 93
Functionality ................................................................................. 93
Function block .............................................................................. 93
Logic diagram ............................................................................... 94
Input and output signals ............................................................... 96
Setting parameters ....................................................................... 96
Technical data .............................................................................. 97
Current reversal and weak-end infeed logic (ZCAL).......................... 98
Application .................................................................................... 98
Functionality ................................................................................. 98
Function block .............................................................................. 99
Logic diagram ............................................................................... 99
Input and output signals ............................................................. 100
Setting parameters ..................................................................... 101
Technical data ............................................................................ 102
Contents