Method for operating vacuum circuit breaker
A technology for vacuum circuit breakers and operating methods, which is applied to high-voltage air circuit breakers, circuits, electrical components, etc., can solve the problems of increasing the emission coefficient of the contact surface, and achieve the effect of good pressure resistance
Active Publication Date: 2015-04-15
COOPER NINGBO ELECTRIC
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Problems solved by technology
The current research has found that the cause of heavy breakdown is closely related to the high-frequency inrush current generated during the switching process. The contact surface structure increases the field emission coefficient β of the contact surface
Method used
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[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] refer to figure 1 , figure 2 , image 3 , a method of operating a vacuum circuit breaker, each phase of the vacuum circuit breaker has two vacuum interrupters, including a first vacuum interrupter 1 and a second vacuum interrupter 2, and the first vacuum interrupter 1 and the second vacuum interrupter 2 are connected in series.
[0021] The moving contacts and static contacts of the first vacuum interrupter 1 are made of materials with excellent pressure resistance to improve the current breaking capacity of the first vacuum interrupter, and the moving contacts and static contacts of the second vacuum interrupter 2 The contacts are all made of materials with excellent anti-welding properties. The material of the moving contact and the static contact of the first vacuum interrupter described in this embodiment is copper-chr...
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The invention relates to a method for operating a vacuum circuit breaker. Each phase of the vacuum circuit breaker is provided with two vacuum arc extinguish chambers, namely a first vacuum arc extinguish chamber and a second vacuum arc extinguish chamber, wherein the first vacuum arc extinguish chamber and the second vacuum arc extinguish chamber are connected in series; a movable contact and a fixed contact of the vacuum arc extinguish chamber are made from materials with excellent current switching-on / off capability and voltage resistance, and the movable contact and the fixed contact of the second vacuum arc extinguish chamber are made from materials with excellent fusion welding resistance; in a switching-on process, the first vacuum arc extinguish chamber is firstly switched on, and the second vacuum arc extinguish chamber is secondly switched on; in a switching-off process, the first vacuum arc extinguish chamber is firstly switched off, and the second vacuum arc extinguish chamber is secondly switched off. According to the method for operating the vacuum circuit breaker, disclosed by the invention, the switching-off performance and the fusion welding resistance are separated so that the fusion welding resistance of the vacuum arc extinguish chamber can be effectively improved, and the capacitative current cut-off heavy-breakdown probability of the vacuum arc extinguish chamber is reduced.
Description
(1) Technical field [0001] The invention relates to a method of operating a vacuum circuit breaker. (2) Background technology [0002] Each phase of a vacuum circuit breaker generally includes a vacuum interrupter. The vacuum interrupter includes a closed space composed of an insulating shell, a movable end cover, and a static end cover. The inside of the closed space is in a vacuum state. The moving guide rod passes through the end cover of the driven end, and the moving and static end cover of the static guide rod passes through. The end of the moving guide rod is provided with a moving contact, the end of the static guide rod is provided with a static contact, and the moving contact is opposite to the static contact and both are located in a closed space. When the brake is closed, the moving guide rod moves to make the moving contact contact with the static contact, and when the brake is opened, the moving guide rod moves to separate the moving contact and the static con...
Claims
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IPC IPC(8): H01H33/66H01H33/664
Inventor 赵峰胡标
Owner COOPER NINGBO ELECTRIC