INSULATED AND SHIELDED PARTIAL DISCHARGE SENSOR DEVICE OF HIGH FREQUENCY CURRENT TRANSFORMER, HFCT, HIGH GAIN AND LOW DISTORTION WITH SELF-TEST SYSTEM FOR HIGH VOLTAGE EQUIPMENT AND INSTALLATIONS (Machine-translation by Google Translate, not legally binding)

The present invention refers to a partial discharge sensor device of the high frequency current transformer type, HFCT, with high gain, low distortion and high immunity against noise that allows obtaining high measurement precision, with a self-checking system designed to fixed monitoring of high voltage equipment and installations, comprising a ferrite core; a first measuring coil wound to the ferrite core; and a first coaxial cable soldered 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 resin coating. (Machine-translation by Google Translate, not legally binding) La presente invención se refiere a un dispositivo sensor de descargas parciales de tipo transformador de corriente de alta frecuencia, HFCT, de alta ganancia, baja distorsión y alta inmunidad frente al ruido que permite obtener una alta precisión de medida, con sistema de autochequeo destinado a monitorización fija de equipos e instalaciones de alta tensión, que comprende un núcleo de ferrita; una primera bobina de medida arrollada al núcleo de ferrita; y un primer cable coaxial soldado a la primera bobina de medida; donde el dispositivo sensor además comprende: una segunda bobina auxiliar de chequeo arrollada al núcleo de ferrita; una resistencia eléctrica en serie con la bobina auxiliar de chequeo; un segundo cable coaxial soldado a la resistencia eléctrica; y un recubrimiento exterior de resina.