ABB Relion 650 Series Technical Manual page 433

1MRK 506 326-UUS B
=
Q Im( )
EQUATION1404 V1 EN-US
= =
S S
EQUATION1405 V1 EN-US
=
PF cos
EQUATION1406 V1 EN-US
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 analog 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 magnitude 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 233.
Line distance protection REL650
Technical manual
S
+
2 2
P Q
P
j
=
S
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"Measurement supervision".
Section 13
Monitoring
(Equation 79)
(Equation 80)
(Equation 81)
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