settled, and also if the average impedance is based on enough values so thatstatistically the signal noise is “filtered out”. This results in a fairly accurateimpedance measurement which can be used as an alternative reference.5. Click the Select button when the standard deviation has converged so that itsmagnitude is within the noise level of the measured absolute impedance.In the second commissioning sub tab, Step2 : Save Reference Impedance, themeasured real and imaginary reference 2 impedance is presented.6. Select the Submit to Parameter setting button.This forwards the newly acquired reference to Parameter setting.7. Write the newly acquired real and imaginary parts of Reference 2 to IED.6.6 Verifying calibration GUID-3805BA77-6369-4798-8E1B-1201A0B9C68A v2After the calibration is performed, it is appropriate to verify that known faults aremeasured as expected and that the function is indicating trips and alarms when itshould, in other words that the calibration was successful. For this purpose themonitoring feature can be used.1. In the ICT toolbar, select the fourth tab, Monitoring.Section 6 1MRK 502 073-UUS ACalibrating injection based sensitive rotor earth fault protection72 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062Commissioning manual
