Siemens SIPROTEC 7SA6 Manual page 10

6.2 Distance Protection............................................................................................................ 6-29
6.2.1 Earth Fault Recognition ..................................................................................................... 6-29
6.2.1.1 Method of Operation .......................................................................................................... 6-29
6.2.1.2 Setting of the Parameters for this Function ....................................................................... 6-32
6.2.2 Fault detection ................................................................................................................... 6-32
6.2.2.1 Overcurrent Fault Detection............................................................................................... 6-32
6.2.2.2 Voltage-Dependent Current Fault Detection U/I ................................................................ 6-33
6.2.2.3 Voltage and Phase-Angle Dependent Current Fault Detection U/I/j.................................. 6-36
6.2.2.4 Applying the Function Parameter Settings ........................................................................ 6-37
6.2.2.5 Settings.............................................................................................................................. 6-40
6.2.2.6 Information Overview ........................................................................................................ 6-41
6.2.3 Calculation of the Impedances .......................................................................................... 6-42
6.2.3.1 Method of Operation .......................................................................................................... 6-42
6.2.3.2 Applying the Function Parameter Settings ........................................................................ 6-49
6.2.3.3 Settings.............................................................................................................................. 6-51
6.2.3.4 Information Overview......................................................................................................... 6-52
6.2.4 Distance Protection with Polygonal Tripping Characteristic (optional) .............................. 6-55
6.2.4.1 Method of Operation .......................................................................................................... 6-55
6.2.4.2 Applying the Function Parameter Settings ........................................................................ 6-60
6.2.4.3 Settings.............................................................................................................................. 6-64
6.2.5 Tripping Logic of the Distance Protection .......................................................................... 6-67
6.2.5.1 Method of Operation .......................................................................................................... 6-67
6.2.5.2 Applying the Function Parameter Settings ........................................................................ 6-71
6.3 Measures to Be Taken in Case of Power Swings (optional).............................................. 6-72
6.3.1 Method of Operation .......................................................................................................... 6-72
6.3.2 Applying the Function Parameter Settings ........................................................................ 6-77
6.3.3 Settings ............................................................................................................................ 6-77
6.3.4 Information Overview ........................................................................................................ 6-77
6.4 Protection Data Interfaces and Protection Data Topology (optional)................................. 6-78
6.4.1 Function description........................................................................................................... 6-78
6.4.2 Setting Function Parameters ............................................................................................. 6-81
6.4.3 Settings.............................................................................................................................. 6-84
6.4.4 Information Overview......................................................................................................... 6-84
6.5 Transmission of Binary Information (optional) .................................................................. 6-86
6.5.1 Information Overview ........................................................................................................ 6-86
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7SA6 Manual
C53000-G1176-C156-2