H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/215
H01H 33/66 (2006.01)
Patent
CA 1289172
ABSTRACT An inventive vacuum interrupter has an improved dielectric strength and durability which leads to an improved interruption performance. The interrupter has a vacuum envelope comprising an insulating cylinder, a metal end plate hermetically sealed to one edge of the insulating cylinder, a bottomed metal cylinder with its open end hermetically sealed to the other edge of the insulating cylinder, and a metal bellows connected to the bottom of the metal cylinder. A stationary lead rod passes through the metal end plate and the insulating cylinder and terminates within the metal cylinder, an inner end of the stationary lead rod carrying a stationary electrode. A movable lead rod extends coaxially with the stationary lead rod, an inner end of the movable lead rod carrying a movable electrode. The movable lead rod is sufficiently longer than the stationary lead rod. The metal bellows is located outside of the metal cylinder and has an exterior exposed to the air and an interior exposed to the vacuum within the vacuum envelope. A coil producing an axial magnetic field in parallel to an arc current path formed between the electrodes when the electrodes are separated surrounds the electrodes outside of the metal cylinder. - 24 -
533337
Fukai Toshimasa
Sakuma Shinzo
Tamaki Nobuaki
Kabushiki Kaisha Meidensha
Robic
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