Function Block - ABB RES670 Technical Manual

Relion 670 series, phasor measurement unit

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1MRK 511 408-UUS A

Phasor measurement unit RES670 2.2 ANSI

Technical manual

I: phase currents (magnitude and angle) (CMMXU)

V: voltages (phase-to-ground and phase-to-phase voltage, magnitude and angle)

(VMMXU, VNMMXU)

The CVMMXN function calculates three-phase power quantities by using fundamental

frequency phasors (DFT values) of the measured current and 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

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).

Function block

The available function blocks of an IED are depending on the actual hardware (TRM)

and the logic configuration made in PCM600.

SEMOD130334-4 v7

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