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AssigneeKabushiki Kaisha Toshiba
InventorsNaoki Shutoh, Motomasa Imai, Fumio Ueno, Hideyasu Andoh, Shoji Kozuka, Hiroshi Endo, Iwao Mitsuishi
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According to this invention, there is disclosed a compact power circuit breaker having a large breaking capacity and stable breaking performance due to a compact closing resistor unit having high performance. The power circuit breaker includes a main switching mechanism having an arc extinguishing function, an auxiliary switching mechanism parallelly connected to the main switching mechanism and having an arc extinguishing function, and a closing resistor unit connected in series with the auxiliary switching mechanism and incorporated with a resistor containing zinc oxide (ZnO) as a main component and titanium figured out as titanium oxide (TiO.sub.2) in an amount of 0.5 to 25 mol% and nickel figured out as nickel oxide (NiO) in an amount of 0.5 to 30 mol. % as sub-components.
A power circuit breaker comprising:
A power resistor comprising:
A power resistor comprising:
A power circuit breaker including a main switching means, an auxiliary switching means connected in parallel to said main switching means, and a closing resistor unit connected in series with said auxiliary switching means, the improvement comprising a closing resistor unit containing a resistor comprising zinc oxide, titanium oxide in an amount of 0.5 to 25 mol. %, and nickel oxide in an amount of 0.5 to 30 mol. %.
Dependencies are inferred from the claim text.