breaker
A technology of circuit breakers and moving contacts, applied in circuit breaker parts, circuit breaker contacts, circuits, etc., can solve the problems of declining cost competitiveness and the need to improve arc extinguishing performance, so as to improve the ability to break arcs, cost reduction effect
Active Publication Date: 2017-04-26
SCHNEIDER ELECTRIC IND SAS
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
As the price of precious metals continues to rise, the cost competitiveness of this product will continue to decline, and the molded case circuit breaker with this structure is used in direct current, and the arc extinguishing performance needs to be improved
Method used
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Embodiment Construction
[0041] According to Figure 2 to Figure 5 The structure and working principle of the circuit breaker according to the present invention will be described in detail.
[0042] Such as figure 2 As shown, the circuit breaker 1 according to the present invention includes a first moving contact 11 and a first static contact 12, a second moving contact 21 and a second static contact 22, and a magnetic blowing coil 2; a magnetic blowing coil and a first static contact The two moving contacts 21 and the second static contact 22 are connected in parallel, that is, one end of the magnetic blowing coil 2 is connected to the second static contact 22, and the other end is connected to the second moving contact 21, and the first moving contact 11 is connected to the second static contact 22. The two moving contacts 21 are connected in series, and the magnetic blowing coil 2 is located on the side where the first moving contact 21 and the first static contact 22 are located.
[0043] Here, one e...
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The invention provides a circuit breaker, which can shorten the time that the arc stays on the silver contacts of the moving and static contacts of the circuit breaker during the breaking process of the circuit breaker, and reduce the burning damage of the silver contacts by the arc, thereby improving the efficiency of the circuit breaker. The electrical operating performance and breaking performance of a circuit breaker under short circuit or overload conditions. The circuit breaker includes a correspondingly matched first movable contact and a first stationary contact; a correspondingly matched second movable contact and a second stationary contact; and a magnetic blowing coil; the magnetic blowing coil and the second movable contact and a third Two static contacts are connected in parallel, and the first movable contact and the second movable contact are connected in series; the magnetic blowing coil is located on the side of the first movable contact and the first static contact.
Description
Technical field [0001] The present invention relates to a circuit breaker, in particular to a circuit breaker with a magnetic blown coil, and more particularly to a molded case circuit breaker with a magnetic blown coil. Background technique [0002] A molded case circuit breaker is a low-voltage electrical appliance used to connect and break current and provide protection for lines and equipment in the event of overcurrent. Electrical life and short-circuit breaking capacity are important performance indicators of molded case circuit breakers. Normally, it is positively correlated with the size of the silver contacts of the dynamic and static contacts of the molded case circuit breaker. However, due to the scarcity of silver, it is a very expensive metal. Although the use of silver in molded case circuit breakers is very small, silver still accounts for a considerable proportion of the cost. It is very meaningful to reduce the amount of silver in the molded case circuit breaker...
Claims
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IPC IPC(8): H01H73/18H01H73/04H01H9/44
Inventor 刘振忠
Owner SCHNEIDER ELECTRIC IND SAS