Page 128 - Practical Power System and Protective Relays Commissioning

Voltage Transformers Chapter | 11 127

FIGURE 11.5 Capacitive voltage transformer circuit.

FIGURE 11.6 Capacitive voltage transformer equivalent circuit.

TABLE 11.1 Voltage Transformer Accuracy Classes According to IEC
60044-2

Class Ratio Error (%) Phase Displacement Error (min)
0.1 0.1 5
0.2 0.2 10
0.5 0.5 20
1 1 40
3 3
3P 3 120
6P 6 240