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US 2020/0357587 A1Published application
Insulating molded body and gas circuit breaker
AssigneeMitsubishi Electric Corporation
InventorsShuichi HIZA, Takashi KAWANA, Fumihiko HOSOKOSHI, Motohiro SATO, Kenji MIMURA
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Abstract
An insulating molded body to be used for an arc extinguishing device of a gas circuit breaker is provided. The insulating molded body includes a fluororesin mixture which contains a fluororesin and an oxygen generator configured to generate oxygen through thermal decomposition at 450° C. or more and 1,150° C. or less with an arc generated when a conduction current is interrupted. The oxygen generator is dispersed in the fluororesin. Also provided is a gas circuit breaker including an insulating nozzle formed of the insulating molded body.
Claims7
1:
- An insulating molded body to be used for an arc extinguishing device of a gas circuit breaker,
- the insulating molded body comprising a fluororesin mixture which contains a fluororesin and an oxygen generator configured to generate oxygen through thermal decomposition at 450° C. or more and 1,150° C. or less with an arc generated when a conduction current is interrupted, and in which the oxygen generator is dispersed in the fluororesin.
2:
- The insulating molded body according to claim 1, wherein the oxygen generator is an inorganic peroxide.
3:
- The insulating molded body according to claim 2, wherein the inorganic peroxide is at least any one of sodium peroxide, potassium peroxide, or barium peroxide.
4:
- The insulating molded body according to claim 1, wherein the oxygen generator is an inorganic oxide.
5:
- The insulating molded body according to claim 4, wherein the inorganic oxide is at least any one of manganese dioxide, cobalt(II,III) oxide, or copper(II) oxide.
6:
- A gas circuit breaker, comprising an insulating nozzle formed of the insulating molded body of according to claim 1.
7:
- The gas circuit breaker according to claim 6,
- wherein the arc extinguishing device is filled with an insulating gas, and
- wherein the insulating gas is sulfur hexafluoride.