2.2.2 Definite Time, High-set Elements 50-3, 50-2, 50N-3, 50N-2..........................................47
2.2.3 Definite Time Overcurrent Elements 50-1, 50N-1......................................................... 49
2.2.4 Inverse Time Overcurrent Elements 51, 51N ................................................................52
2.2.5 Dynamic Cold Load Pickup Function.............................................................................55
2.2.6 Inrush Restraint .......................................................................................................... 55
2.2.7 Pickup Logic and Tripping Logic................................................................................... 57
2.2.8 Two-phase Overcurrent Protection (Only Non-Directional) ...........................................58
2.2.9 Fast Busbar Protection Using Reverse Interlocking ....................................................... 59
2.2.10 Setting Notes...............................................................................................................59
2.2.11 Settings.......................................................................................................................67
2.2.12 Information List...........................................................................................................69
2.3 Dynamic Cold Load Pickup.................................................................................................72
2.3.1 Description..................................................................................................................72
2.3.2 Setting Notes...............................................................................................................74
2.3.3 Settings.......................................................................................................................75
2.3.4 Information List...........................................................................................................76
2.4 Single-Phase Overcurrent Protection..................................................................................77
2.4.1 Description..................................................................................................................77
2.4.2 High-impedance Ground Fault Unit Protection............................................................. 78
2.4.3 Tank Leakage Protection..............................................................................................80
2.4.4 Setting Notes...............................................................................................................81
2.4.5 Settings.......................................................................................................................86
2.4.6 Information List...........................................................................................................86
2.5 Negative Sequence Protection 46......................................................................................87
2.5.1 Definite Time characteristic .........................................................................................87
2.5.2 Inverse Time characteristic 46-TOC.............................................................................. 88
2.5.3 Setting Notes...............................................................................................................90
2.5.4 Settings.......................................................................................................................92
2.5.5 Information List...........................................................................................................93
2.6 Motor Protection...............................................................................................................94
2.6.1 Motor Starting Protection 48........................................................................................94
2.6.1.1 Description............................................................................................................ 94
2.6.1.2 Setting Notes......................................................................................................... 97
2.6.2 Motor Restart Inhibit 66...............................................................................................98
2.6.2.1 Description............................................................................................................ 99
2.6.2.2 Setting Notes....................................................................................................... 103
2.6.3 Load Jam Protection (51M)........................................................................................ 107
2.6.3.1 Description.......................................................................................................... 107
2.6.3.2 Setting Notes....................................................................................................... 109
2.6.4 Motorprotection (Motor Starting Protection 48, Motor Restart Inhibit 66, LoadJam)....111
2.6.4.1 Settings............................................................................................................... 111
2.6.4.2 Information List................................................................................................... 112
2.7 Thermal Overload Protection 49...................................................................................... 113
2.7.1 Description................................................................................................................113
2.7.2 Setting Notes.............................................................................................................115
2.7.3 Settings.....................................................................................................................119
2.7.4 Information List.........................................................................................................120
Table of Contents
10 SIPROTEC 4, 7SJ61, Manual
C53000-G1140-C210-6, Edition 05.2016
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