223 A B CV V a V a V× = + × + ×EQUATION1818-ANSI V1 EN-US (Equation 107)Where:A B CandV V VEQUATION1820-ANSI V1 EN-USare the measured phase voltages23 31 0, 5 2ja e jp×= × = - +.IECEQUATION00022 V2 EN-US4. Compare the result with the set value of the negative-sequence operating voltage(consider that the set value 3V2PU is in percentage of the base voltage VBase).5. Repeat steps 1 and 2. Then slowly increase the measured current in one phaseuntil the BLKV signal disappears.6. Record the measured current and calculate the corresponding negative-sequencecurrent according to the equation (observe that the currents in the equation arephasors):223 A B CI I a I a I× = + × + ×ANSIEQUATION00021 V1 EN-US (Equation 108)Where:A B CI I and I,ANSIEQUATION00020 V1 EN-USare the measured phase currents23 31 0, 5 2ja e jp×= × = - +.IECEQUATION00022 V2 EN-US7. Compare the result with the set value of the negative-sequence operating current.Consider that the set value 3I2< is in percentage of the base current IBase.13.9.2.3 Measuring the trip value for the zero-sequence function M1405-72 v11Measure the trip value for the zero-sequence function, if included in the IED.1MRK 502 073-UUS A Section 13Testing functionality by secondary injectionGenerator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 243Commissioning manual
