ABB Relion 650 Series Technical Manual page 436

Section 13
Monitoring
In some application, for example, when power is measured on the secondary side of the power
transformer it might be desirable, from the end client point of view, to have actually opposite
directional convention for active and reactive power measurements. This can be easily achieved by
setting parameter
reactive power will have positive values when they flow from the protected object towards the
busbar.
Frequency
Frequency is actually not calculated within measurement block. It is simply obtained from the pre-
processing block and then just given out from the measurement block as an output.
13.4.8.3 Phase current measurement CMMXU
The Phase current measurement (CMMXU) function must be connected to three-phase current
input in the configuration tool to be operable. Currents handled in the function can be calibrated
to get better then class 0.5 measuring accuracy for internal use, on the outputs and IEC 61850.
This is achieved by magnitude and angle compensation at 5, 30 and 100% of rated current. The
compensation below 5% and above 100% is constant and linear in between, see figure 233.
Phase currents (magnitude and angle) are available on the outputs and each magnitude output
has a corresponding supervision level output (Ix_RANGE). The supervision output signal is an
integer in the interval 0-4, see section
13.4.8.4 Phase-phase and phase-neutral voltage measurements VMMXU, VNMMXU
The voltage function must be connected to three-phase voltage input in the configuration tool to
be operable. Voltages are handled in the same way as currents when it comes to class 0.5
calibrations, see above.
The voltages (phase or phase-phase voltage, magnitude and angle) are available on the outputs
and each magnitude output has a corresponding supervision level output (Vxy_RANG). The
supervision output signal is an integer in the interval 0-4, see section
13.4.8.5 Voltage and current sequence measurements VMSQI, CMSQI
The measurement functions must be connected to three-phase current (CMSQI) or voltage
(VMSQI) input in the configuration tool to be operable. No outputs, but XRANG, are calculated
within the measuring block and it is not possible to calibrate the signals. Input signals are
obtained from the pre-processing block and transferred to corresponding output.
Positive, negative and three times zero sequence quantities are available on the outputs (voltage
and current, magnitude and angle). Each magnitude output has a corresponding supervision level
output (X_RANGE). The output signal is an integer in the interval 0-4, see section
supervision".
430
PowAngComp to value of 180.0 degrees. With such setting the active and
"Measurement
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supervision".
"Measurement
Line distance protection REL650
1MRK 506 326-UUS B
SEMOD54417-261 v2
SEMOD54417-264 v5
SEMOD54417-268 v4
supervision".
SEMOD54417-299 v4
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