Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1989-10-18
1991-04-30
Karlsen, Ernest F.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
174139, 324107, 324127, G01R 120, G01R 1900, H01B 1700
Patent
active
050121820
ABSTRACT:
The disclosed porcelain insulator has built-in optical transmission media extending therethrough from a base metal secured at one end thereof to a conductor-holding fixture at the opposite end thereof. The conductor-holding fixture may carry one or both of two type sensing units: namely, a sensing unit having a current transformer (CT) coupled to the phase conductor, a load resistor connected to the CT, and an electro-optic element coupled to both said load resistor and said optical transmission medium; and another sensing unit having a capacitive potential transformer (PT) coupled to said conductor and an electro-optic element coupled to both said PT and said optical transmission medium. An electric measuring device is formed by applying light to the electro-optic element through the optical transmission medium of the insulator, modulating the incident light by the electro-optic element depending on the line current or voltage, receiving the modulated light through the optical transmission medium of the insulator, converting the modulation of the received light into an electric signal. Due to information detection right by the line conductor and optical transmissioin of the information, ill effects such as electromagnetic interference and insulation deterioration at the spot of detection and along the information transmission path are eliminated. Thus, when used in transmission and distribution lines the device improves the safety and accuracy and maintains the improved level of safety and accuracy.
REFERENCES:
patent: 3312895 (1967-04-01), Garbuny
patent: 3312898 (1967-04-01), Browne
patent: 3324393 (1967-06-01), Casey et al.
patent: 3485940 (1969-12-01), Perry et al.
patent: 3506833 (1970-04-01), Willisen
patent: 3662263 (1972-05-01), Bensel
patent: 3679974 (1972-07-01), Mollenbeck
patent: 4269483 (1981-05-01), Feldtkeller
patent: 4810836 (1989-03-01), Shinoda et al.
patent: 4921322 (1990-05-01), Seike et al.
Fujiki Toshisada
Furukawa Yoshinari
Kato Kazuaki
Kondo Taikichi
Okimoto Akimichi
Karlsen Ernest F.
NGK Insulators Ltd.
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