Artículo
Shielded electronic current transformer
Fecha
2004Registro en:
Slomovitz, D., de Souza, Heriguatí. Shielded electronic current transformer [en línea] IEEE Transactions on Instrumentation and Measurement, 2004, v. 54, no. 2. doi 10.1109/TIM.2005.843565
Autor
Slomovitz, Daniel
de Souza, Heriguatí
Institución
Resumen
A current transformer with nominal ratio 10 A to 10 mA, intended for low-frequency applications, was developed. It includes an electronic device to reduce the magnetizing current, and a continuous shield in the secondary winding (coaxial cable) in order to eliminate the effect of stray capacitances. No guard-source is connected to the shield. It is proposed in this paper to leave the cable-shield-potential floating. This leads to high-accuracy results (ratio errors and phase-displacements in the order of few parts in 10/sup 6/ from 50 Hz to 1 kHz).