Electromagnetic operating mechanism of circuit breaker

Abstract

The invention discloses an electromagnetic operating mechanism of a circuit breaker. The electromagnetic operating mechanism comprises a static contact, a moving contact matched with the static contact, and an electromagnetic mechanism capable of operating the moving contact, wherein the electromagnetic mechanism is hinged with a swing arm through a transition connecting piece; the tail end of theswing arm is hinged to the moving contact so as to drive the moving contact to be opened and closed, a clamping hook used for being matched with the transition connecting piece is arranged on the front side of the electromagnetic mechanism, and the clamping hook can be driven by the elastic driving piece so as to be matched with the transition connecting piece to achieve closing locking or opening separation. With the adoption of the structure, the whole operating mechanism not only maintains the characteristics of no power consumption and no voltage short-circuit protection of the original spring mechanism in the closing state, but also has high reliability of the electromagnetic mechanism, overcomes all defects of the two mechanisms, has the best characteristics of the two mechanisms, can prolong the electrical life and the mechanical life by multiple times, and completely meets the technical standard requirements of the state grid for the high-reliability switch.

Description

technical field [0001] The invention relates to a switch mechanism for opening and closing in electrical equipment, in particular to an electromagnetic operating mechanism for a circuit breaker. Background technique [0002] At present, all molded case reclosing switches in China are based on the traditional spring mechanism molded case switch, adding electric operation or motor drive mechanism for reclosing or opening. The spring mechanism is a multi-link mechanism with complex structure and failure. Many, slow opening and closing speed, poor reliability, and short life, it is difficult to meet the reliability requirements of the State Grid Corporation of China (the State Grid requires its mechanical life to be 5000-8000 times, and currently almost no manufacturers can meet this requirement requirements), and the action discreteness of tens of milliseconds. [0003] In addition, the high-reliability control and protection switch with an electromagnetic closing mechanism ne...

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Problems solved by technology

[0002] At present, all molded case reclosing switches in China are based on the traditional spring mechanism molded case switch, adding electric operation or motor drive mechanism for reclosing or opening. The spring mechanism is a multi-link mechanism with complex structure and failure. Many, slow opening and closing speed, poor reliability, and short life, it is difficult to meet the reliability requirements of the State Grid Corporation of China (the State Grid requires its mechanical life to be 5000-8000 times, and currently almost no manufacturers can meet this requirement requirements), and the action discreteness of tens of milliseconds

[0003] In addition, the high-reliability control and protection switch with an electromagnetic closing mechanism needs to be maintained by electromagnetic attraction for a long time, high energy consumption, and does not have a no-voltage short-circuit tripping protection mechanism, so it is difficult to meet GB14048.2 relevant standards in

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