Phase-Phase And Phase-Neutral Voltage Measurements Vmmxu, Vnmmxu - ABB Relion Technical Manual

1MRK 502 048-UUS A
14.1.8.4
14.1.8.5
14.1.9
Technical manual
of rated current. The compensation below 5% and above 100% is constant and linear in
between, see figure 245.
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
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
"Measurement supervision".
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, other than X_RANG,
are calculated within the measuring blocks 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 "Measurement
Technical data
Table 375: CVMMXN, CMMXU, VMMXU, CMSQI, VMSQI, VNMMXU
Function
Voltage
Connected current
Active power, P
Table continues on next page
supervision".
Range or value
(0.1-1.5) ×V
n
(0.2-4.0) × I
n
0.1 x V < V < 1.5 x V
n n
0.2 x I < I < 4.0 x I
n n
Section 14
Monitoring
"Measurement supervision".
Accuracy
± 0.5% of V at V£V
n n
± 0.5% of V at V > V
n
± 0.5% of I at I £ I
n n
± 0.5% of I at I > I
n
± 1.0% of S at S ≤ S
n n
± 1.0% of S at S > S
n
537