4. Close the switch to the station earth and check that the trip from the rotorearth fault will be given after the set delay time.5. Open the switch to the station earth and check that the trip signal resetsinstantaneously.6. Connect an adjustable resistor to the field circuit (221 on RXTTE4). Decreasethis resistor from a large value until the function operates and checkmonitored value ICOSFI.When the generator has been started the service value of injection voltage andinjection current shall be checked so that there is no risk for unwanted tripdue to large capacitive detected current.13.4.8.2 Completing the test SEMOD158692-35 v2Continue to test another function or end the test by changing the TESTMODEsetting to Off. Restore connections and settings to their original values, if they werechanged for testing purposes.13.5 Current protection SEMOD53531-1 v113.5.1 Instantaneous phase overcurrent protection 3-phase outputPHPIOC M11754-3 v8Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".Values of the logical signals for PHPIOC are available on the local HMI underMain menu/Tests/Function status/Current protection/InstPhaseOverCurrent(50,3I>>)/PHPIOC(50;3I>>):x, where x = 1, 2, and 3.The Signal Monitoring in PCM600 shows the same signals that are available on thelocal HMI.To verify the settings the following fault type should be tested:• Phase-to-earth faultEnsure that the maximum continuous current, supplied from the current sourceused for the test of the IED, does not exceed four times the rated current value ofthe IED.13.5.1.1 Measuring the operate limit of set values M11754-11 v7Section 13 1MRK 502 073-UEN ATesting functionality by secondary injection174 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062Commissioning manual
