The directional function needs voltage as it is voltage polarized with memory. Thefunction can be set to be directional or non-directional independently for each ofthe steps.A second harmonic blocking level can be set for the function and can be used toblock each step individually.7.2.3 Function block M12609-3 v8OC4PTOCI3P*U3P*BLOCKBLKTRBLKST1BLKST2BLKST3BLKST4ENMULT1ENMULT2ENMULT3ENMULT4TRIPTR1TR2TR3TR4TRL1TRL2TRL3TR1L1TR1L2TR1L3TR2L1TR2L2TR2L3TR3L1TR3L2TR3L3TR4L1TR4L2TR4L3STARTST1ST2ST3ST4STL1STL2STL3ST1L1ST1L2ST1L3ST2L1ST2L2ST2L3ST3L1ST3L2ST3L3ST4L1ST4L2ST4L3ST2NDHRMDIRL1DIRL2DIRL3STDI RCNDIEC06000187-4-en.vsdxIEC06000187 V4 EN-USFigure 81: OC4PTOC function block1MRK 506 382-UEN A Section 7Current protectionLine distance protection REL650 2.2 IEC 163Technical manual
