Values of the logical signals belonging to the sensitive directional residualovercurrent and power protection are available on the local HMI under Mainmenu/Test/Function status/Current protection/SensDirResOvCurr(67N,IN>)/SDEPSDE(67N,IN>):x11.5.6.1 Measuring the operate and time limit for set values SEMOD175060-12 v2Operation mode 3I0 · cosφ SEMOD175060-34 v9Procedure1. Set the polarizing voltage to 1.2 · UNRel> and set the phase angle betweenvoltage and current to the set characteristic angle (RCADir). Note that the thecurrent lagging the voltage.Take setting RCAComp into consideration if not equal to 0.2. Inject current until the function picks up, and make sure that the operatecurrent of the set directional element is equal to the INcosPhi> setting.The I Dir (3I0 · cosφ) function activates the START and STDIRIN output.3. Assume that φ´ is the phase angle between injected voltage (3U0) and current(3I0) i.e. φ´ = RCADir-φ. Change φ´ to for example 45 degrees. Increase theinjected current until the function operates.4. Compare the result with the set value and make sure that the new injected 3I0· cos φ is equal to the setting INcosPhi>..Take the set characteristic into consideration, see Figure 43 and Figure 44.5. Measure the operate time of the timer by injecting a current two times the setINcosPhi> value and the polarizing voltage 1.2 · UNRel>.( )0 0 cos3 3test testkSN SrefTinv I Uj×= × ×IECEQUATION2402 V2 EN-US (Equation 80)6. Compare the result with the expected value.The expected value depends on whether definite or inverse time was selected.7. Set the polarizing voltage to zero and increase until the boolean output signalUNREL is activated, which is visible in the Application Configuration inPCM600 when the IED is in online mode. Compare the voltage with the setvalue UNRel> .8. Continue to test another function or complete the test by setting the test modeto Off.Section 11 1MRK 505 378-UEN ATesting functionality by secondary injection178 Line differential protection RED670 2.2 IECCommissioning manual
