Technical data........................................................................... 137Section 7 Impedance protection...................................................139Power swing detection ZMRPSB ...................................................139Identification.............................................................................. 139Functionality.............................................................................. 139Function block........................................................................... 139Signals.......................................................................................140Settings......................................................................................140Operation principle.................................................................... 141Resistive reach in forward direction..................................... 142Resistive reach in reverse direction..................................... 143Reactive reach in forward and reverse direction.................. 144Basic detection logic.............................................................144Operating and inhibit conditions........................................... 146Technical data........................................................................... 146Underimpedance protection for generators and transformersZGCPDIS........................................................................................146Identification.............................................................................. 146Functionality.............................................................................. 147Function block........................................................................... 147Signals.......................................................................................148Settings......................................................................................148Operation principle.................................................................... 149Full scheme measurement................................................... 149Impedance characteristic..................................................... 149Basic operation characteristics.............................................150Theory of operation.............................................................. 151Technical data........................................................................... 153Loss of excitation LEXPDIS............................................................153Identification.............................................................................. 153Functionality.............................................................................. 153Function block........................................................................... 154Signals.......................................................................................154Settings......................................................................................155Monitored data...........................................................................156Operation principle.................................................................... 156Technical data........................................................................... 160Out-of-step protection OOSPPAM..................................................160Identification.............................................................................. 160Functionality.............................................................................. 160Function block........................................................................... 161Signals.......................................................................................161Settings......................................................................................162Table of contents4Technical manual
