Siemens siprotec 7SA6 - Page 11

xi7SA6 Manual
C53000-G1176-C156-2
6.6 Teleprotection Schemes with Distance Protection ............................................................ 6-89
6.6.1 Method of Operation..........................................................................................................6-90
6.6.1.1 Permissive Underreach Transfer Trip with Pick-up (PUTT) .............................................. 6-91
6.6.1.2 Permissive Underreach Transfer Trip with Zone Acceleration Z1B (PUTT)...................... 6-93
6.6.1.3 Direct Underreach Transfer Trip........................................................................................ 6-95
6.6.1.4 Permissive Overreach Transfer Trip (POTT)..................................................................... 6-96
6.6.1.5 Directional Comparison Pickup ......................................................................................... 6-99
6.6.1.6 Unblocking with Z1B........................................................................................................ 6-102
6.6.1.7 Blocking scheme ............................................................................................................. 6-106
6.6.1.8 Pilot Wire Comparison..................................................................................................... 6-109
6.6.1.9 Reverse Interlocking........................................................................................................ 6-111
6.6.1.10 Transient Blocking........................................................................................................... 6-112
6.6.1.11 Measures for Weak and Zero Infeed............................................................................... 6-112
6.6.2 Applying the Function Parameter Settings ...................................................................... 6-114
6.6.3 Settings ........................................................................................................................... 6-118
6.6.4 Information Overview ...................................................................................................... 6-119
6.7 Earth Fault Protection in Earthed Systems (optional)...................................................... 6-121
6.7.1 Method of Operation........................................................................................................ 6-121
6.7.2 Applying the Function Parameter Settings ...................................................................... 6-128
6.7.3 Settings ........................................................................................................................... 6-135
6.7.4 Information Overview ...................................................................................................... 6-138
6.8 Earth Fault Protection Teleprotection Schemes (optional).............................................. 6-139
6.8.1 Method of Operation........................................................................................................ 6-140
6.8.1.1 Directional Comparison Scheme..................................................................................... 6-140
6.8.1.2 Directional Unblocking Scheme....................................................................................... 6-144
6.8.1.3 Directional Blocking Scheme........................................................................................... 6-146
6.8.1.4 Transient Blocking........................................................................................................... 6-148
6.8.1.5 Measures for Weak or Zero Infeed.................................................................................. 6-149
6.8.2 Applying the Function Parameter Settings ...................................................................... 6-151
6.8.3 Settings ........................................................................................................................... 6-154
6.8.4 Information Overview ...................................................................................................... 6-155
6.9 Weak-Infeed Tripping ...................................................................................................... 6-156
6.9.1 Method of Operation........................................................................................................ 6-156
6.9.2 Applying the Function Parameter Settings ...................................................................... 6-158
6.9.3 Settings ........................................................................................................................... 6-159
6.9.4 Information Overview ...................................................................................................... 6-159
6.10 External Direct and Remote Tripping .............................................................................. 6-160
6.10.1 Method of Operation........................................................................................................ 6-160
6.10.2 Applying the Function Parameter Settings ...................................................................... 6-161
6.10.3 Settings .......................................................................................................................... 6-161
6.10.4 Information Overview ...................................................................................................... 6-161
6.11 Overcurrent Protection .................................................................................................... 6-162
6.11.1 Method of Operation........................................................................................................ 6-163
6.11.2 Applying the Function Parameter Settings ...................................................................... 6-169
6.11.3 Settings ........................................................................................................................... 6-174
6.11.4 Information Overview ...................................................................................................... 6-175