V1I1RCA=+45 degMax forwardangleMin forwardangleMax reverseangleMin reverseangle BackwardareaForwardareaMin operate voltageMin operate currentCharacteristicAngle/max torque linezero torque lineGUID-F08570BC-073C-4911-B082-091D652F7E35 V1 ENFigure 231: Configurable directional settingsLow-level blockingFor a reliable operation, signal levels should be greater than the minimum level. If theyare not greater than the minimum level, Timer is blocked. If the amplitude of thepositive-sequence current is greater than the Min operate current value and thepositive-sequence voltage amplitude is greater than the Min operate voltage value, theOn signal is sent to Timer.TimerOnce activated, the internal operating timer is started. The Timer characteristic isaccording to definite time DT. When Timer has reached the value of Release delaytime, the RELEASE output is activated. If a drop-off situation happens, that is, if theoperating current moves outside the operating sector or signal amplitudes drop belowthe minimum level before Release delay time is exceeded, the Timer reset state isactivated. If the drop-off continues for more than Reset delay time, Timer isdeactivated.Blocking logicThe binary input BLOCK can be used to block the function. The activation of theBLOCK input deactivates the RELEASE output and resets Timer.4.6.1.5 ApplicationThe three-phase power directional element DPSRDIR improves the possibility toobtain a selective function of the overcurrent protection in meshed networks. Thefunction is used to block or release other overcurrent protection functions.1MRS758755 A Section 4Protection functionsREC615 and RER615 455Technical Manual
