초록 ▼

Apparatus for detecting the sufficiency and quality of an amount of dielectric material contained in the cavity of a transformer bushing is disclosed. The apparatus comprises a collar assembly which when placed over the bushing forms a capacitive element, a tunable signal producer for applying a sig

Apparatus for detecting the sufficiency and quality of an amount of dielectric material contained in the cavity of a transformer bushing is disclosed. The apparatus comprises a collar assembly which when placed over the bushing forms a capacitive element, a tunable signal producer for applying a signal to the capacitive element, a circuit for receiving, amplifying and rectifying the output signal from the capacitive element, and an indicator to detect and indicate the dielectric condition or capacitance of the capacitive element and thus the sufficiency and/or quality of the dielectric material within said bushing assembly.

대표청구항 ▼

Apparatus for testing the dielectric conditions of a bushing having an insulative shell with a cavity therein for containing a dielectric filler and a conductive member extending through said cavity, comprising: collar means comprising a conductive sleeve adapted to surround the insulative shell of

Apparatus for testing the dielectric conditions of a bushing having an insulative shell with a cavity therein for containing a dielectric filler and a conductive member extending through said cavity, comprising: collar means comprising a conductive sleeve adapted to surround the insulative shell of said bushing for forming a capacitor with said conductive member; first circuit means connected to one of said conductive member and conductive sleeve for applying a low voltage input signal thereto; and second circuit means connected to the other of said conductive member and conductive sleeve for receiving an output signal therefrom, said output signal being indicative of the dielectric condition of the dielectric filler contained in the cavity of said bushing.