ABB RELION RET670 Applications Manual

Also see for RELION RET670: Operator's manual Commissioning manual Product guide Installation manual Commissioning manual

Contents

ABB RELION RET670 Applications Manual Manual pdf 466 page image

RjXBAMeasuredimpedance at inititalfault positionImpedance locus at initial powerswing after the fault clearanceZMRPSB operating characteristicZone 2Zone 1IEC99000181_2_en.vsdIEC99000181 V2 EN-USFigure 231: Impedance trajectory within the distance protection zones 1 and 2during and after the fault on line B – D8.15.3 Setting guidelines SEMOD171741-1 v18.15.3.1 Scheme communication and tripping for faults occurring during powerswinging over the protected line SEMOD131360-4 v2The IED includes generally up to five distance protection zones. It is possible to useone or two of them intentionally for selective fault clearing during power swings only.Following are the basic conditions for the operation of the so called (underreaching andoverreaching) power-swing zones:Section 8 1MRK 504 163-UUS AImpedance protection460 Transformer protection RET670 2.2 ANSIApplication manual