Setting Guidelines - ABB REL650 Applications Manual

1MRK 506 334-UUS A
14.4.3
Application manual
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 fundamental
frequency phasors (DFT values) of the measured current respectively voltage signals. The
measured power quantities are available either, as instantaneously calculated quantities
or, averaged values over a period of time (low pass filtered) depending on the selected
settings.

Setting guidelines

The 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 of
operation (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 of
calculating monitored three-phase values depending on the available VT inputs connected
to 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.
Section 14
Monitoring
431