Metal oxide resistor, power resistor, and power circuit breaker

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Resistance inserting

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338 20, 338 21, 338225, 252502, 252503, 252506, H01H 3316, H01C 710, H01C 800

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055095585

ABSTRACT:
A metal oxide resistor for suppressing variations in resistivity in use in an atmosphere at a high temperature or humidity. Such a metal oxide resistor includes a sintered body in which carbon particles having an average grain size of 1 .mu.m or less exist in the grain boundaries of metal oxide particles in an amount of 0.05 to 3 wt %, and electrodes formed on at least two opposing surfaces of the sintered body.

REFERENCES:
patent: 4418327 (1983-11-01), Palilla et al.
patent: 5219494 (1993-06-01), Ambros et al.
patent: 5254816 (1993-10-01), Shutoh et al.
patent: 5373129 (1994-12-01), Shutoh et al.
Database WPI, Derwent Publications, AN 85-022142, JP-A-59 217 668, Dec. 7, 1984.
Database WPI, Derwent Publications, AN 82-36310, JP-A-57 052 101, Mar. 27, 1982.

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