ABB Relion 650 Series Applications Manual

Also see for RELION 650 SERIES: Technical manual Technical manual Commissioning manual Engineering manual Operation manual

Contents

L1IL1IL2IL3L2 L3Protected ObjectCT 600/5Star ConnectedIL1IL2IL3IEDIEC13000002-4-en.vsdx1 234SMAI2BLOCKREVROT^GRP2L1^GRP2L2^GRP2L3^GRP2NAI3PAI1AI2AI3AI4AIN5INIEC13000002 V4 EN-USFigure 9: Star connected three-phase CT set with star point towards the protected objectWhere:1) The drawing shows how to connect three individual phase currents from a star connected three-phase CT set to the three CT inputs of the IED.2) The current inputs are located in the TRM. It shall be noted that for all these current inputs thefollowing setting values shall be entered for the example shown in Figure 9.'• CTprim=600A• CTsec=5A• CTStarPoint=ToObjectInside the IED only the ratio of the first two parameters is used. The third parameter(CTStarPoint=ToObject) as set in this example causes no change on the measured currents. In otherwords, currents are already measured towards the protected object.Table continues on next pageSection 4 1MRK 505 355-UEN AAnalog inputs38Application manual