Siemens 7SC80 - Page 12

2.2.2 Definite Time, High-set Elements 50-3, 50-2, 50N-3, 50N-2..........................................71
2.2.3 Definite Time Overcurrent Elements 50-1, 50N-1......................................................... 72
2.2.4 Inverse Time Overcurrent Elements 51, 51N ................................................................74
2.2.5 Inverse Time Overcurrent Elements 51-1, 51-2, 51-3, 51-4 and 51N-1, 51N-2,
51N-3, 51N-4.............................................................................................................. 78
2.2.6 Inverse Time Overcurrent Protection 51V (Voltage-Controlled/Voltage-Restraint).......... 81
2.2.7 Special Variant Function 50-1, 50N-1 for Service Interlocking....................................... 84
2.2.8 Dynamic Cold Load Pickup Function.............................................................................85
2.2.9 Inrush Restraint .......................................................................................................... 85
2.2.10 Pickup Logic and Tripping Logic................................................................................... 85
2.2.11 Two-phase Overcurrent Protection (Only Non-Directional) ...........................................87
2.2.12 Setting Notes...............................................................................................................87
2.2.13 Settings.......................................................................................................................96
2.2.14 Information List.........................................................................................................107
2.3 Directional Overcurrent Protection 67, 67N..................................................................... 111
2.3.1 General..................................................................................................................... 111
2.3.2 Directional Definite Time High-Current Elements 67-2, 67-3, 67N-2 and 67N-3...........112
2.3.3 Definite Time, Directional Time Overcurrent Elements 67-1, 67N-1.............................113
2.3.4 Inverse Time, Directional Time Overcurrent Elements 67-TOC, 67N-TOC..................... 115
2.3.5 Inverse Time, Directional Time Overcurrent Elements 67-TOC-1, 67-TOC-2, 67-
TOC-3, 67-TOC-4 and 67N-TOC-1, 67N-TOC-2, 67N-TOC-3, 67N-TOC-4.......................117
2.3.6 Interaction with Voltage Monitoring ..........................................................................121
2.3.7 Dynamic Cold Load Pickup Function...........................................................................121
2.3.8 Inrush Restraint......................................................................................................... 121
2.3.9 Determination of Direction........................................................................................ 121
2.3.10 Setting Notes.............................................................................................................125
2.3.11 Settings.....................................................................................................................134
2.3.12 Information List.........................................................................................................147
2.4 Dynamic Cold Load Pickup...............................................................................................151
2.4.1 Description................................................................................................................151
2.4.2 Setting Notes.............................................................................................................153
2.4.3 Settings.....................................................................................................................157
2.4.4 Information List.........................................................................................................165
2.5 Single-Phase Overcurrent Protection................................................................................166
2.5.1 Description................................................................................................................166
2.5.2 High-Impedance Ground Fault Unit Protection........................................................... 167
2.5.3 Tank Leakage Protection............................................................................................169
2.5.4 Setting Notes.............................................................................................................170
2.5.5 Settings.....................................................................................................................175
2.5.6 Information List.........................................................................................................186
2.6 Voltage Protection 27, 59................................................................................................187
2.6.1 Measurement Principle.............................................................................................. 187
2.6.2 Overvoltage Protection 59......................................................................................... 189
2.6.3 Undervoltage Protection 27....................................................................................... 189
2.6.4 Displacement Voltage Protection............................................................................... 192
2.6.5 Setting Notes.............................................................................................................194
Table of Contents
12 SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017