A circuit breaker with a separate repulsion mechanism
A technology of repulsion mechanism and circuit breaker, which is applied in the direction of high-voltage air circuit breaker, protection switch operation/release mechanism, circuit, etc., can solve the problems of long time-consuming, opening and closing time, etc., and achieve the effect of ensuring safety performance
Active Publication Date: 2022-07-01
SHANGHAI ELECTRICGROUP CORP
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Problems solved by technology
But in the existing circuit breaker, the repulsion plate and the pull rod of the repulsion mechanism are integrated, and the weight of the repulsion plate is relatively large. According to the momentum theorem Ft=mv, the repulsion plate will affect the overall movement speed of the repulsion mechanism, making the same stroke More time-consuming, so that the opening and closing time is longer
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[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0039] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.
[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.
[0041] The present invention includes a circuit breaker with a separate repulsion...
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The invention relates to the technical field of electrical equipment, in particular to a circuit breaker with a separate repulsion mechanism. The circuit breaker includes a repulsion mechanism, a permanent magnet mechanism, and a vacuum interrupter. The repulsion mechanism includes: a repulsion disk, and a repulsion disk is provided in the center of the circuit breaker. A first through hole; a pull rod, the bottom of the pull rod passes through the first through hole and is connected with the movable contact, and the size of the top of the pull rod is larger than the size of the first through hole, so that the top of the pull rod is stuck on the upper surface of the repulsion disk , the pull rod is used to drive the moving contact to move up and down, so as to realize the closing action and opening action of the circuit breaker; a limit plate is arranged between the repulsion plate and the permanent magnet mechanism, and there is a second channel in the center of the limit plate. The size of the second through hole is smaller than the size of the repulsion disk and larger than the size of the top of the tie rod. Beneficial effects: During the opening process of the circuit breaker, after the repulsion disc drives the pulling rod to move for a certain stroke, it is separated from the pulling rod due to the restriction of the limited position plate, thereby increasing the opening speed of the circuit breaker.
Description
technical field [0001] The invention relates to the technical field of electrical equipment, in particular to a circuit breaker with a separate repulsion mechanism. Background technique [0002] The circuit breaker is an indispensable protection device for the power system, which can carry and break the current under abnormal circuit conditions within a specified time to protect the power grid and the electrical equipment on the circuit from damage. The operating mechanism of the traditional circuit breaker is generally a multi-link transmission type permanent magnet mechanism or a spring-acting mechanism. Due to structural limitations, their inherent opening time is generally about 20ms. From the perspective of the rapidity of the circuit breaker, the entire switching A circuit breaker whose process time can meet within 10ms is a competitive product. [0003] In the prior art, an electromagnetic repulsion mechanism is usually used in a circuit breaker to realize rapid open...
Claims
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IPC IPC(8): H01H33/666H01H71/32H01H71/68
CPCH01H33/666H01H71/32H01H71/68
Inventor 施源曹碧颖杨建波李福生胡晓羽
Owner SHANGHAI ELECTRICGROUP CORP