Siemens SIPROTEC 7SJ62 Instruction Manual page 9

6 Functions........................................................................................................................................... 6-1
6.1 General................................................................................................................................ 6-3
6.1.1 Power System Data 1.......................................................................................................... 6-8
6.1.1.1 Settings ............................................................................................................................. 6-11
6.1.1.2 Information ....................................................................................................................... 6-12
6.1.2 Setting Groups .................................................................................................................. 6-12
6.1.2.1 Information ........................................................................................................................ 6-14
6.1.3 Power System Data 2........................................................................................................ 6-14
6.1.3.1 Settings ............................................................................................................................. 6-17
6.1.3.2 Information ........................................................................................................................ 6-17
6.2 Overcurrent Protection (50, 50N, 51, 51N)........................................................................ 6-18
6.2.1 Description of Instantaneous Overcurrent Protection........................................................ 6-18
6.2.1.1 Definite Time, Instantaneous Overcurrent Protection (50, 50N)........................................ 6-18
6.2.1.2 Inverse Time-Overcurrent Protection (51, 51N) ................................................................ 6-22
6.2.1.3 Reverse Interlocking Bus Protection ................................................................................. 6-25
6.2.2 Programming Time-Overcurrent Settings.......................................................................... 6-26
6.2.2.1 Programming Settings for Time-Overcurrent Phase Protection ........................................ 6-26
6.2.2.2 Settings for Phase Overcurrent Protection ........................................................................ 6-32
6.2.2.3 Information List for Phase Overcurrent Protection ............................................................ 6-34
6.2.2.4 Programming Settings for Time-Overcurrent Ground Protection ...................................... 6-34
6.2.2.5 Settings for Ground Overcurrent Protection ...................................................................... 6-37
6.2.2.6 Information List for Ground Overcurrent Protection........................................................... 6-38
6.3 Directional Overcurrent Protection (67, 67N) .................................................................... 6-40
6.3.1 Description of Directional Overcurrent Protection ............................................................. 6-42
6.3.1.1 Definite Time, Directional Overcurrent Protection ............................................................. 6-42
6.3.1.2 Inverse Time, Directional Overcurrent Protection (67-TOC, 67N-TOC) ............................ 6-44
6.3.1.3 Determination of Direction ................................................................................................. 6-45
6.3.1.4 Reverse Interlocking for Looped Lines .............................................................................. 6-48
6.3.2 Programming Directional Overcurrent Settings ................................................................. 6-49
6.3.2.1 Programming Settings For Directional Overcurrent Phase Protection .............................. 6-49
6.3.2.2 Settings for Directional Phase Overcurrent Protection ...................................................... 6-54
6.3.2.3 Information List for Directional Phase Overcurrent Protection .......................................... 6-56
6.3.2.4 Programming Settings for Directional Overcurrent Ground Protection.............................. 6-57
6.3.2.5 Settings for Directional Ground Overcurrent Protection .................................................... 6-59
6.3.2.6 Information List for Directional Ground Overcurrent Protection......................................... 6-60
6.4 Dynamic Cold Load Pick-Up Function (50c, 50Nc, 51Nc, 67c, 67Nc)............................... 6-62
6.4.1 Description of Dynamic Cold Load Pick-Up Function........................................................ 6-62
6.4.2 Programming Settings ....................................................................................................... 6-64
6.4.2.1 Settings for Dynamic Cold Load Adjustments ................................................................... 6-65
6.4.2.2 Information List for Dynamic Cold Load Setting Adjustments ........................................... 6-68
6.5 Inrush Restraint ................................................................................................................. 6-69
6.5.1 Description of Inrush Restraint .......................................................................................... 6-69
6.5.2 Programming Settings ....................................................................................................... 6-71
6.5.2.1 Settings for Inrush Restraint (Stabilization) ....................................................................... 6-71
6.5.2.2 Information List for Inrush Restraint (Stabilization)............................................................ 6-72
7SJ62 Instruction Manual
C53000-G1140-C121-1
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