CYG PRS-7367 - Page 17

Table of contents
PRS-7367 9
3.39.3 Application Scope ..........................................................................................................194
3.39.4 Settings ..........................................................................................................................195
3.40 Block Busbar Protection ........................................................................... 195
3.40.1 Overview ........................................................................................................................195
3.40.2 Protection Principle ........................................................................................................196
3.40.3 Application Scope ..........................................................................................................198
3.40.4 Settings ..........................................................................................................................198
3.41 Gap Over-current & Zero-sequence Over-voltage Protection ................ 198
3.41.1 Overview ........................................................................................................................198
3.41.2 Protection Principle ........................................................................................................199
3.41.3 Application Scope ..........................................................................................................200
3.41.4 Settings ..........................................................................................................................200
3.42 Restricted Earth Fault Protection 64REF ................................................. 200
3.42.1 Overview ........................................................................................................................200
3.42.2 Protection Principle ........................................................................................................201
3.42.3 Logic Diagram ................................................................................................................206
3.42.4 Settings ..........................................................................................................................206
3.43 Transformer Current circuit supervision TF CTS .................................... 207
3.43.1 Overview ........................................................................................................................207
3.43.2 Logic Diagram ................................................................................................................209
3.43.3 Protection Principle ........................................................................................................209
3.44 Transformer Fuse failure supervision TF VTS ......................................... 210
3.44.1 Overview ........................................................................................................................210
3.44.2 Logic Diagram ................................................................................................................ 211
3.44.3 Protection Principle ........................................................................................................ 211
3.45 Faulty Phase Selection (FPS) .................................................................... 211
3.45.1 Overview ........................................................................................................................ 211
3.45.2 Operation Principle ........................................................................................................212
3.45.3 Settings ..........................................................................................................................213
3.46 Stabilized differential protection for machines 87MPDIF ....................... 214