ABB Relion 650 Series REB650, Technical Manual

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• P, Q and S: three phase active, reactive and apparent power
• PF: power factor
• U: phase-to-phase voltage amplitude
• I: phase current amplitude
• 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 (amplitude and angle) (CMMXU)
• U: voltages (phase-to-earth and phase-to-phase voltage, amplitude 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 amplitude 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, amplitude and angle)
• U: sequence voltages (positive, zero and negative sequence, amplitude 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
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Section 12
1MRK 505 288-UEN A
Monitoring
312
Technical manual