DISPOSITIVO SENSOR AISLADO Y APANTALLADO DE DESCARGAS PARCIALES DE TIPO TRANSFORMADOR DE CORRIENTE DE ALTA FRECUENCIA, HFCT, DE ALTA GANANCIA Y BAJA DISTORSION CON SISTEMA DE AUTOCHEQUEO PARA EQUIPOS E INSTALACIONES DE ALTA TENSION

The present invention relates to a high gain, low distortion and high noise immunity high frequency current transformer, HFCT, partial discharge sensor device that allows obtaining a high measurement accuracy, with a self-check system intended for fixed monitoring of high voltage equipment and installations, comprising a ferrite core; a first measurement coil wound to the ferrite core; and a first coaxial cable welded to the first measurement coil; wherein the sensor device further comprises: a second auxiliary check coil wound to the ferrite core; an electrical resistance in series with the auxiliary check coil; a second coaxial cable welded to the electrical resistance; and an outer coating of resin.