TAVRIDA ELECTRIC Rec15/25 Al1 5p, Руководство пользователя, Страница: 21 / 136

21
Figure 23
Life cycle of OSM
Table 2
– Sensors parameters
Parameter Phase current sensors Zero-sequence current sensor Voltage sensors
Range where accuracy is provided
1 … 8000
1
A
1 … 8000
1
A
0.3 … 27 kV
Range of sensor coefficients at 20°C 1.8 … 2.2 V/kA 1.8 … 2.2 V/kA 0.1 … 0.2 V/kV
Table 3
– Measurement accuracy
2
Parameter Basic error Range where accuracy is guaranteed
Phase currents
The greater of ±1% or ±2A
0 ... 630 A
Residual current
3
The greater of ±5% or ±0.5A
0 ... 400 A
Phase to earth voltages
The greater of ±1% or ±0.1 kV
0.3 ... 16.0 kV
Line to line voltages
The greater of ±1% or ±0.1 kV
0.5 ... 27.0 kV
Frequency
- at dF/dt<0.2 Hz/s
- at dF/dt<0.5 Hz/s
±0.025 Hz
±0.05 Hz
45 ... 55 Hz, 55 ...6 5 Hz
Power factor
±0.02
0 ... 1
Active and reactive energy
±2%
40
… 630A, 4.5 ... 27 kV
Active, reactive and total power
±2%
40
… 630A, 4.5 ... 27 kV
1
The Rogowski coil can measure current in a wide range but for the purpose of over-voltage, protection suppressors are fitted in the secondary circuits.
These suppressors chop the signal from the Rogowski coil if primary current exceeds 8 kA.
2
If RC5_4 sensor coefficient settings are configured in accordance with guidelines in Table 2 of this guide. Error is measured at normal climatic conditions.
3
Note that overcurrent protection pickup setting value shall not exceed SEF pickup setting value times 300.