The power system quantities provided, depends on the actual hardware,(TRM) and the logic configuration made in PCM600.The measuring functions CMSQI and VMSQI provide sequence component quantities:• I: sequence currents (positive, zero, negative sequence, magnitude and angle)• V: sequence voltages (positive, zero and negative sequence, magnitude and angle).The CVMMXN function calculates three-phase power quantities by using fundamentalfrequency phasors (DFT values) of the measured current respectively voltage signals. Themeasured power quantities are available either, as instantaneously calculated quantitiesor, averaged values over a period of time (low pass filtered) depending on the selectedsettings.14.4.3 Setting guidelinesThe available setting parameters of the measurement function CVMMXN, CMMXU,VMMXU, CMSQI, VMSQI, VNMMXU are depending on the actual hardware (TRM)and the logic configuration made in PCM600.The parameters for the Measurement functions CVMMXN, CMMXU, VMMXU,CMSQI, VMSQI, VNMMXU are set via the local HMI or PCM600.GlobalBaseSel: Selects the global base value group used by the function to define (IBase),(VBase) and (SBase).Operation: Disabled/Enabled. Every function instance (CVMMXN, CMMXU,VMMXU, CMSQI, VMSQI, VNMMXU) can be taken in operation (Enabled) or out ofoperation (Disabled).The following general settings can be set for the Measurement function (CVMMXN).PowMagFact: Magnitude factor to scale power calculations.PowAngComp: Angle compensation for phase shift between measured I & V.Mode: Selection of measured current and voltage. There are 9 different ways ofcalculating monitored three-phase values depending on the available VT inputs connectedto the IED. See parameter group setting table.k: Low pass filter coefficient for power measurement, V and I.VMagCompY: Magnitude compensation to calibrate voltage measurements at Y% of Vn,where Y is equal to 5, 30 or 100.1MRK 506 334-UUS A Section 14Monitoring431Application manual
