ABB RET650 Technical Manual page 440

Section 14
Monitoring
434
= = 2 + 2
S S P Q
EQUATION1405 V1 EN
P
j
= =
PF cos
S
EQUATION1406 V1 EN
Additionally to the power factor value the two binary output signals from the function
are provided which indicates the angular relationship between current and voltage
phasors. Binary output signal ILAG is set to one when current phasor is lagging
behind voltage phasor. Binary output signal ILEAD is set to one when current phasor
is leading the voltage phasor.
Each analogue output has a corresponding supervision level output (X_RANGE). The
output signal is an integer in the interval 0-4, see section
Calibration of analog inputs
Measured currents and voltages used in the CVMMXN function can be calibrated to
get class 0.5 measuring accuracy. This is achieved by amplitude and angle
compensation at 5, 30 and 100% of rated current and voltage. The compensation
below 5% and above 100% is constant and linear in between, see example in
figure 195.
1MRK 504 135-UEN A
(Equation 105)
(Equation 106)
"Measurement supervision".
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