After the three measurements ICT calculates the complex factors k1 and k2. Thereference impedance RefR1 + jRefX1 is also calculated. After this the values aredownloaded to the parameter setting in PCM600. From PCM600 the settings aredownloaded to IED.During the three measurements described above a check is made that there aresufficient changes in the measured impedance in order to guarantee that there is noprimary fault from the beginning or other problems due to the installation orcalibration procedure.Now the reference impedance is derived for one operational state. It might benecessary to make measurements to derive reference impedance for otheroperational cases. For information on this, see Commissioning below.CommissioningDifferent operating conditions of the machine may require different referenceimpedances.If a particular operating condition of the generator requires a second referenceimpedance, the Commissioning tab of ICT is used to define and save the secondreference.If more than one reference impedance are to be used, there must be a logicconfigured to detect when the generator is in such condition and change thereference.MonitoringThe Monitoring tab of ICT offers the possibility to monitor several quantitiesduring tests as well as in normal operating condition in order to evaluate thebehavior of the protection function. It can help in the identification of the operatingconditions, where a change of reference impedance is required.AuditingIn the auditing part calibration and commissioning reports are stored..6.3 Launching injection commissioning tool (ICT)GUID-15CAE2A3-FA17-4119-9188-824C7F309D4B v21. To launch the Injection commissioning tool (ICT), right-click REG670 in thePCM plant structure and select the Injection commissioning.2. In the ICT toolbar, select the Rotor Earth Fault function.1MRK 502 073-UEN A Section 6Calibrating injection based sensitive rotor earth fault protectionGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 61Commissioning manual
