Siemens SIPROTEC 4 7SD80

2.2 Phase Comparison Protection and Ground Differential Protection.......................................48
2.2.1 Differential Topology................................................................................................... 48
2.2.1.1 Setting Notes......................................................................................................... 48
2.2.1.2 Settings................................................................................................................. 48
2.2.1.3 Information List..................................................................................................... 48
2.2.2 Phase Comparison Protection.......................................................................................49
2.2.2.1 Functional Description........................................................................................... 49
2.2.2.2 Setting Notes......................................................................................................... 53
2.2.3 Ground Current Differential Protection in Grounded Systems........................................54
2.2.3.1 Funktionsbeschreibung..........................................................................................54
2.2.3.2 Setting Notes......................................................................................................... 57
2.2.4 Restricted Ground-Fault Protection in Resonant-grounded/Isolated Systems..................58
2.2.4.1 Funktionsbeschreibung..........................................................................................58
2.2.4.2 Setting Notes......................................................................................................... 61
2.2.5 Differential Protection Pickup Logic and Tripping Logic.................................................62
2.2.5.1 Functional Description........................................................................................... 62
2.2.6 87 Differential Protection.............................................................................................63
2.2.6.1 Settings................................................................................................................. 63
2.2.6.2 Information List..................................................................................................... 64
2.2.7 Differential Protection Test and Commissioning........................................................... 65
2.2.7.1 Differential Protection Test.....................................................................................65
2.2.7.2 Differential Protection Commissioning....................................................................66
2.3 Breaker Intertrip and Remote Tripping............................................................................... 69
2.3.1 Functional Description.................................................................................................69
2.3.2 Setting Notes...............................................................................................................70
2.3.3 Settings.......................................................................................................................71
2.3.4 Information List...........................................................................................................71
2.4 Backup overcurrent........................................................................................................... 72
2.4.1 Operating Modes.........................................................................................................72
2.4.2 Non-directional Overcurrent Protection........................................................................72
2.4.3 Directional Overcurrent Protection...............................................................................76
2.4.4 Setting Notes...............................................................................................................82
2.4.5 Settings.......................................................................................................................85
2.4.6 Information List...........................................................................................................88
2.5 InRush Restraint................................................................................................................ 91
2.5.1 Functional Description.................................................................................................91
2.5.2 Setting Notes...............................................................................................................92
2.5.3 Settings.......................................................................................................................92
2.5.4 Information List...........................................................................................................93
2.6 Circuit Breaker Failure Protection 50BF.............................................................................. 94
2.6.1 Functional Description.................................................................................................94
2.6.2 Setting Notes.............................................................................................................100
2.6.3 Settings.....................................................................................................................102
2.6.4 Information List.........................................................................................................103
2.7 Thermal Overload Protection 49...................................................................................... 104
2.7.1 Functional Description...............................................................................................104
2.7.2 Setting Notes.............................................................................................................105
2.7.3 Settings.....................................................................................................................107
2.7.4 Information List.........................................................................................................107
Table of Contents
12 SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018