that the HW connections are proper (cables etc.), and selected gains andinjection frequency on the REX060 is properly selected. Then repeat steps 3to 6. Note that the FreqInjected setting in Parameter setting for the specificfunction must correspond with the chosen injection frequency on the REX060HMI for that function.IEC11000045-1-en.vsdFrequency found bythe function Voltage and current signalstaus and TRIP indicationFfunction status field. Errors andabnormalities are displayed in orderto simplify trouble shooting.GUID-84947C77-215F-4007-AAC0-9433B8444396 V1 EN-USFigure 20: ICT signals and function indication panel9. When the installing procedure is successful, select the Submit and save inreport button. ICT will now forward a more accurate frequency to Parametersetting. In the Parameter setting tool, write the newly acquired parameter toIED.The accurate setting of this frequency is essential for proper operation of theprotection under different operating conditions.7.4 Performing calibration GUID-9304B342-8BCF-49E3-8429-E64919DC8EBD v21. From the Calibratiing tab, select the first sub tab, i.e. Step1: Measurement1.2. Make sure you have not attached any additional impedance in parallel withthe stator. The generator shall be in a condition that is as close as possible tothe normal operating condition as during the Installation.3. From the ICT toolbar, select the Start reading values from IED button.ICT now performs continuous measurements and after the tenth measurementit starts to update the graph. Notice that the stability region indicator barreduces in size.It is very important that calibration steps 1 to 3 is performedin the proper order. If not, the calibration might fail. Ifreadings are not stable during the step, a warning to repeat thestep may be suggested; the step shall be repeat in order toavoid that the calibration fails.4. When the statistical error of the performed continuous measurements reachesan acceptable value, the indicator bar reaches the stability region (turnedgreen) and it is allowed to select the Submit button.1MRK 502 073-UEN A Section 7Calibrating injection based 100% stator earth fault protectionGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 79Commissioning manual
