Protective gap devices for protecting circuit breakers
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorsShinichi Menju, Iwao Ohshima, Shigeru Takahashi
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Abstract
In a protective gap device for protecting a circuit breaker, there are provided a cylindrical metalic shell, a high voltage electrode unit, and a low voltage electrode unit. The high and low voltage electrode units are respectively provided with a main electrode, a trigger electrode, and a cylindrical electrode plate, each of the trigger electrodes having a rod-shaped electrode so as to form a trigger gap between the main electrode and the trigger electrode.
Claims3
A protective gap device for protecting a circuit breaker comprising a cylindrical metal shell filled with an arc extinguishing medium;
- a high voltage electrode unit including a first main electrode supported by an insulating member which is arranged to close one end of said shell, a first trigger electrode secured to said first main electrode, and a ring-shaped metal member surrounding said first main electrode and connected electrically to said first trigger electrode through conductors which extend through a plurality of holes provided in said first main electrode;
- and a low voltage electrode unit including a second trigger electrode secured to a grounded metal plate closing the other end of said shell, a second main electrode attached to said grounded metal plate, and a metal cylinder connected electrically to said second main electrode and spaced from said metal shell.
Dependencies are inferred from the claim text.