Micom P634 - Operating Data Measurement

3.12.6 Operating Data Measurement
The P634 has an operating data measurement function for the display of currents
and voltages measured as well as quantities derived from these measured
values. For the display of measured values, set lower thresholds need to be
exceeded, to avoid fluctuating small values from noise. If these lower thresholds
are not exceeded, the value Not measured is displayed. The following measured
variables are displayed:
●
Phase currents of all three phases of all 4 ends of the transformer
●
Maximum phase current of each end of the transformer
●
Minimum phase current of each end of the transformer
●
Delayed and stored maximum phase current of each end of the transformer
●
Positive- and negative-sequence current measured values of all ends
●
Current I
N
derived by the P634 from the sum of the phase currents for each
end of the transformer
●
Current I
Y
measured by the P634 at transformer -Tx4 (x: 1, 2 or 3)
●
Phase currents of all three phases of the virtual end of the transformer. The
virtual end is formed by adding the corresponding currents of two
transformer ends selected by the user at MAIN: Current summation;
see Section 3.12.5, (p. 3-72).
●
Positive- and negative-sequence current measured values of the virtual end
●
Maximum phase current of the virtual end of the transformer
●
Minimum phase current of the virtual end of the transformer
●
Current I
N
of the virtual end of the transformer
●
Voltage
●
Frequency
●
Angle between the phase currents for a given end of the transformer
●
Angle between the currents of the same phase between two ends of the
transformer
●
Angle between derived IN and the current measured at transformer -Tx4 (x:
1, 2 or 3)
The measured data are updated at approximately 1 s intervals. Updating is
interrupted if a general starting state occurs or if the self-monitoring function
detects a hardware fault.
3 Operation P634
P634/EN M/R-42-A // P634‑311‑653 3-75