13.6.6.3 Completing the test SEMOD158990-34 v3Continue 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.13.7 Frequency protection SEMOD53547-1 v113.7.1 Underfrequency protection SAPTUF M16289-2 v7Prepare the IED for verification of settings outlined in Section "Preparing the IEDto verify settings".13.7.1.1 Verifying the settings M16289-15 v3Verification of START value and time delay to operate M16289-17 v71. Check that the IED settings are appropriate, for example the start value andthe time delay.2. Supply the IED with three-phase voltages at their rated values and initialfrequency.The initial frequency is calculated using Equation 105.0.02 / 0.04 0.04rStartFrequency floor f StartFrequency IECEQUATION16059 V1 EN-US (Equation 105)3. Slowly decrease the voltage frequency by steps of 40 mHz until the STARTsignal appears; during each step apply the voltage signal for a time that iseither at least 10% longer than (tDelay+100ms) or a suitable time to monitorthe function.4. Note the frequency value at which the START signal appears and compare itwith the set value StartFrequency.5. Increase the frequency until its rated value is reached.6. Check that the START signal resets.7. Supply the IED with three-phase voltages at their rated values and frequency20 mHz over the set value StartFrequency.8. Decrease the frequency with a 40 mHz step, applying it for a time that is atleast 10% longer than (tDelay+100ms).9. Measure the time delay of the TRIP signal, and compare it with the set valuetDelay. Note that the measured time consists of the set value of the time delayplus the minimum operate time of the start function (80 - 90 ms).Extended testing M16289-31 v61MRK 502 073-UEN A Section 13Testing functionality by secondary injectionGenerator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 215Commissioning manual
