Siemens SIPROTEC 4 7SJ61 - Page 11

2.8 Monitoring Functions......................................................................................................121
2.8.1 Measurement Supervision......................................................................................... 121
2.8.1.1 General................................................................................................................121
2.8.1.2 Hardware Monitoring .......................................................................................... 121
2.8.1.3 Software Monitoring ........................................................................................... 123
2.8.1.4 Monitoring of the External Transformer Circuits....................................................123
2.8.1.5 Setting Notes....................................................................................................... 124
2.8.1.6 Settings............................................................................................................... 125
2.8.1.7 Information List................................................................................................... 125
2.8.2 Trip Circuit Supervision 74TC..................................................................................... 126
2.8.2.1 Description.......................................................................................................... 126
2.8.2.2 Setting Notes....................................................................................................... 128
2.8.2.3 Settings............................................................................................................... 129
2.8.2.4 Information List................................................................................................... 129
2.8.3 Malfunction Responses of the Monitoring Functions.................................................. 129
2.8.3.1 Description.......................................................................................................... 129
2.9 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s).........................................................132
2.9.1 Current Elements 50Ns, 51Ns.................................................................................... 132
2.9.2 Logic......................................................................................................................... 132
2.9.3 Setting Notes.............................................................................................................135
2.9.4 Settings.....................................................................................................................138
2.9.5 Information List.........................................................................................................140
2.10 Intermittent Ground Fault Protection...............................................................................141
2.10.1 Description................................................................................................................141
2.10.2 Setting Notes.............................................................................................................144
2.10.3 Settings.....................................................................................................................145
2.10.4 Information List.........................................................................................................145
2.11 Automatic Reclosing System 79.......................................................................................147
2.11.1 Program Execution.................................................................................................... 147
2.11.2 Blocking.................................................................................................................... 150
2.11.3 Status Recognition and Monitoring of the Circuit Breaker........................................... 152
2.11.4 Controlling Protection Elements.................................................................................153
2.11.5 Zone Sequencing / Fuse Saving Scheme..................................................................... 155
2.11.6 Setting Notes.............................................................................................................156
2.11.7 Settings.....................................................................................................................161
2.11.8 Information List.........................................................................................................165
2.12 Breaker Failure Protection 50BF.......................................................................................167
2.12.1 Description................................................................................................................167
2.12.2 Setting Notes.............................................................................................................170
2.12.3 Settings.....................................................................................................................172
2.12.4 Information List.........................................................................................................173
2.13 Flexible Protection Functions...........................................................................................174
2.13.1 Functional Description...............................................................................................174
2.13.2 Setting Notes.............................................................................................................177
2.13.3 Settings.....................................................................................................................180
2.13.4 Information List.........................................................................................................181
2.14 Temperature Detection via RTD Boxes..............................................................................182
2.14.1 Description................................................................................................................182
Table of Contents
SIPROTEC 4, 7SJ61, Manual 11
C53000-G1140-C210-6, Edition 05.2016