•
P, Q and S: three phase active, reactive and apparent power
•
PF: power factor
•
V: phase-to-phase voltage magnitude
•
I: phase current magnitude
•
F: power system frequency
The output values are displayed in the local HMI under
Main menu/Tests/Function
status/Monitoring/CVMMXN/Outputs
The measuring functions CMMXU, VNMMXU and VMMXU provide physical
quantities:
•
I: phase currents (magnitude and angle) (CMMXU)
•
V: voltages (phase-to-ground and phase-to-phase voltage, magnitude and angle)
(VMMXU, VNMMXU)
It is possible to calibrate the measuring function above to get better then class 0.5
presentation. This is accomplished by angle and magnitude compensation at 5, 30 and
100% of rated current and at 100% of rated voltage.
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.
12.1.2
Measurements CVMMXN
12.1.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Measurements
CVMMXN
P, Q, S, I, U, f
SYMBOL-RR V1 EN
-
Section 12
1MRK 505 277-UUS C
Monitoring
218
Technical Manual
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