Electrical feed-through bushing cavity insulation detector

Details Electrical feed-through bushing cavity insulation detector Electrical feed-through bushing cavity insulation detector

1992-07-14

1993-12-21

Wieder, Kenneth A.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324553, 324674, G01R 3112

Patent

active

052724425

ABSTRACT:
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. The collar assembly in one embodiment comprises a pair of electrically conductive segments which are hinged together for positioning about the bushing. The interior surfaces of the collar assembly are shaped to conform substantially to the outer shape of the transformer bushing.

REFERENCES:
patent: 2130865 (1936-05-01), Watts et al.
patent: 2333532 (1941-02-01), Frakes et al.
patent: 2472814 (1945-07-01), Elliott
patent: 4833415 (1989-05-01), Nourai et al.
patent: 5140270 (1992-08-01), Martin et al.

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