Micom P631, Technical Manual

Page: 48 / 638

2.9.3 Deviations of Measured Data Acquisition
2.9.3.1 Definitions
Reference conditions
●
Sinusoidal signals at nominal frequency fnom, total harmonic distortion ≤
2%, ambient temperature 20°C (68°F), and nominal auxiliary voltage
V
A,nom
.
Deviation
●
Deviation relative to the setting under reference conditions.
2.9.3.2 Operating Data Measurement
●
Currents (measuring inputs): ± 1%
●
Voltages (measuring input): ± 0.5%
●
Currents (internally calculated): ± 2%
●
Voltages (internally calculated): ± 2%
●
Frequency: ± 10 mHz
2.9.3.3 Fault Data
Short-circuit current and voltage
●
Deviation: ± 3%
Short-circuit impedance, reactance, and fault location
●
Deviation: ± 5%
2.9.3.4 Internal Clock
With free running internal clock
●
Deviation: < 1 min/month
With external synchronization (with a synchronization interval ≤ 1 min)
●
Deviation: < 10 ms
With synchronization via IRIG-B interface
●
± 1 ms
P631 2 Technical Data
2-20 P631/EN M/R-11-C // P631-310-650