Section 7 Impedance protection7.1 Power swing detection ZMRPSB7.1.1 IdentificationFunction description IEC 61850identificationIEC 60617identificationANSI/IEEE C37.2device numberPower swing detection ZMRPSBZpsbSYMBOL-EE V1 EN687.1.2 FunctionalityPower swings may occur after disconnection of heavy loads or trip of big generationplants.Power swing detection function ZMRPSB is used to detect power swings and initiateblock of all distance protection zones. Occurrence of earth-fault currents during apower swing inhibits the ZMRPSB function to allow fault clearance.7.1.3 Function blockZMRPSBI3P*U3P*BLOCKBLKI01BLKI02I0CHECKEXTERNALSTARTZOUTZINIEC09000058-1-en.vsdIEC09000058 V1 ENFigure 61: ZMRPSB function block1MRK 502 048-UEN A Section 7Impedance protection139Technical manual
