ABB Relion 670 series - Secure System Setup and Configuration; Physical Interfaces for Security; Communication Ports and Services Configuration

8.2.4 Signals................................................................................................................................................ 451
8.2.5 Settings..............................................................................................................................................453
8.2.6 Monitored data................................................................................................................................ 459
8.2.7 Operation principle......................................................................................................................... 459
8.2.8 Technical data...................................................................................................................................467
8.3 Instantaneous residual overcurrent protection EFPIOC (50N)...................................................467
8.3.1 Identification.................................................................................................................................... 468
8.3.2 Functionality.....................................................................................................................................468
8.3.3 Function block..................................................................................................................................468
8.3.4 Signals................................................................................................................................................468
8.3.5 Settings............................................................................................................................................. 469
8.3.6 Monitored data................................................................................................................................ 469
8.3.7 Operation principle......................................................................................................................... 469
8.3.8 Technical data.................................................................................................................................. 470
8.4 Four step residual overcurrent protection, (Zero sequence or negative sequence
directionality) EF4PTOC (51N/67N)................................................................................................. 470
8.4.1 Identification.................................................................................................................................... 470
8.4.2 Functionality.....................................................................................................................................470
8.4.3 Function block...................................................................................................................................471
8.4.4 Signals................................................................................................................................................ 471
8.4.5 Settings..............................................................................................................................................472
8.4.6 Monitored data.................................................................................................................................479
8.4.7 Operation principle..........................................................................................................................479
8.4.7.1 Operating quantity within the function...................................................................................479
8.4.7.2 Internal polarizing........................................................................................................................ 480
8.4.7.3 External polarizing for ground-fault function........................................................................ 482
8.4.7.4 Directional detection for ground fault function.................................................................... 482
8.4.7.5 Base quantities within the protection..................................................................................... 482
8.4.7.6 Internal ground-fault protection structure.............................................................................483
8.4.7.7 Four residual overcurrent steps................................................................................................ 483
8.4.7.8 Directional supervision element with integrated directional comparison function......484
8.4.7.9 Second harmonic blocking element......................................................................................... 486
8.4.7.10 Switch on to fault feature...........................................................................................................488
8.4.8 Technical data.................................................................................................................................. 490
8.5 Four step directional negative phase sequence overcurrent protection NS4PTOC (46I2)... 491
8.5.1 Identification.....................................................................................................................................491
8.5.2 Functionality..................................................................................................................................... 491
8.5.3 Function block.................................................................................................................................. 492
8.5.4 Signals................................................................................................................................................492
8.5.5 Settings..............................................................................................................................................493
8.5.6 Monitored data................................................................................................................................ 498
8.5.7 Operation principle......................................................................................................................... 498
8.5.7.1 Operating quantity within the function.................................................................................. 498
Table of contents
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Technical manual