It is possible to calibrate the measuring function above to get better then class 0.5presentation. This is accomplished by angle and amplitude compensation at 5, 30and 100% of rated current and at 100% of rated voltage.The power system quantities provided, depends on the actualhardware, (TRM) and the logic configuration made in PCM600.The measuring functions CMSQI and VMSQI provide sequence componentquantities:• I: sequence currents (positive, zero, negative sequence, amplitude and angle)• U: sequence voltages (positive, zero and negative sequence, amplitude andangle).16.1.3 Zero clamping GUID-8DABC3F5-6615-493C-B839-A5C557A2FAE8 v4Measuring functions CVMMXN, CMMXU, VMMXU and VNMMXU have nointerconnections regarding any settings or parameters.Zero clampings are also handled entirely by ZeroDb separately for each function'severy output signal. For example, zero clamping of U12 is handled byUL12ZeroDb in VMMXU, zero clamping of I1 is handled by IL1ZeroDb inCMMXU, and so on.Example of CVMMXN operationOutputs seen on the local HMI under Main menu/Measurements/Monitoring/Servicevalues(P_Q)/CVMMXN(P_Q):S Apparent three-phase powerP Active three-phase powerQ Reactive three-phase powerPF Power factorILAG I lagging UILEAD I leading UU System mean voltage, calculated according to selected modeI System mean current, calculated according to selected modeF FrequencyRelevant settings and their values on the local HMI under Main menu/Settings/IED settings/Monitoring/Servicevalues(P_Q)/CVMMXN(P_Q):1MRK 511 407-UEN C Section 16MonitoringPhasor measurement unit RES670 2.2 IEC 251Application manual
