4. Inject a voltage 0.8 · VNRelPU and a current high enough to trip the directionalfunction at the chosen angle.5. Increase the voltage until the directional function is released.6. Compare the measured value with the set VNRelPU trip value.13.5.6.2 Completing the test SEMOD175060-148 v4Continue to test another function or end the test by changing the TESTMODE setting toDisabled. Restore connections and settings to their original values, if they werechanged for testing purposes.13.5.7 Thermal overload protection, two time constants TRPTTR(49) SEMOD53632-3 v5Prepare the IED for verification of settings outlined in Section "Preparing the IED toverify settings".13.5.7.1 Checking trip and reset values SEMOD53632-11 v71. Connect symmetrical three-phase currents to the appropriate current terminals ofthe IED.2. Set the Time constant 1 (Tau1) and Time Constant 2 (Tau2) temporarily to 1minute.3. Set the three-phase injection currents slightly lower than the set trip value of stageIBase1, increase the current in phase A until stage IBase1trips and note the tripvalue.Observe the maximum permitted overloading of the currentcircuits in the IED.4. Decrease the current slowly and note the reset value.Check, in the same way, the trip and reset values of IBase1 for phases B and C.5. Activate the cooling input signal, thus switching to base current IBase2.6. Check the trip and reset values (for all three phases) for IBase2 in the same wayas described above for stage IBase1.7. Deactivate the input signal for stage IBase2.8. Set the time constant for IBase1 in accordance with the setting plan.9. Set the injection current for phase A to 1.50 · IBase1.10. Connect a trip output contact to the timer and monitor the output of contactsALARM1 and ALARM2 to digital inputs in test equipment.Section 13 1MRK 502 073-UUS ATesting functionality by secondary injection200 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062Commissioning manual
