Optical current transformer

Details Optical current transformer Optical current transformer

1990-07-17

1992-04-07

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324 96, 324127, G01R 1900

Patent

active

051031647

ABSTRACT:
An optical current transformer particularly useful for a fault location system for a power supply system and substation, including a casing which can be detachably secured to a plurality of wire conductors which conduct currents of the same phase. Within the casing a plurality of Rogowsky coils are arranged such that when the casing is secured to the wire conductors, each Rogowsky coil is wound around respective wire conductors. The Rogowsky coils are connected in series with an air-core coil and an optical current sensor having a Faraday element is arranged within a space of the coil such that the Faraday element is subjected to a magnetic flux generated by the coil. A magnitude of the magnetic flux is optically detected by the Faraday element to measure a total sum of currents conducting along the wire conductors.

REFERENCES:
patent: 4070572 (1978-01-01), Summerhayes
patent: 4070620 (1978-01-01), Feldtkeller et al.
patent: 4298245 (1981-11-01), Aulich et al.
patent: 4471355 (1984-09-01), Hardy et al.
patent: 4516073 (1985-05-01), Doriath et al.
patent: 4616176 (1986-10-01), Mercure et al.
patent: 4810836 (1989-03-01), Shinoda et al.
patent: 4831327 (1989-05-01), Chenier et al.

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