Molded case circuit breaker for realizing brake separation at different distances
A molded case circuit breaker and protruding part technology, which is applied in the direction of protection switch operation/release mechanism, etc., can solve the problem of not being able to select breaking conditions according to needs, reduce processing costs, lower processing precision requirements, and improve breaking capacity Effect
Inactive Publication Date: 2012-04-25
TIANJIN BAILI ELECTRIC CO LTD
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AI Technical Summary
Problems solved by technology
At present, most operating mechanisms of circuit breakers use the same opening distance regardless of the reason for opening, and different breaking conditions cannot be selected according to needs.
Method used
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Embodiment Construction
[0013] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0014] like figure 1 There is a protruding part 12 at the obtuse angle where the side arm 10 of the re-buckle end on the jumper 1 intersects with the side wall 11 of one end of the bracket articulated with a rotating shaft, and there is a flat plate with the jumper 1 on the protruding part 12 The horizontal bar 2 that is connected vertically with each other.
[0015] When manual opening, press figure 2 Pull the handle 7 in the direction shown, and the spring 5 drives the lever 6, the upper link 8, the lower link 9 and the moving contact 4 to be pulled upwards. Under the action of the backward displacement to form an included angle. The cross bar 2 on the jumper 1 limits the movement of the upper link 8 to complete the opening process of the circui...
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The invention relates to a molded case circuit breaker for realizing brake separation at different distances. The molded case circuit breaker comprises a bracket of an operation mechanism, a trip buckle and a connecting rod, wherein one end of the trip buckle is hinged with the bracket by a hinge shaft; the middle of the trip buckle is hinged with one end of the connecting rod by the hinge shaft; a protruded part is arranged at the part of an obtuse angle formed by intersecting one side arm at the re-buckling end of the trip buckle and a side arm hinged at one end of the bracket by the hinge shaft; and a cross bar which is vertically and fixedly connected with a flat plate surface of the trip buckle is arranged at the protruded part. With the adoption of the cross bar which is vertically and fixedly connected with the flat plate surface of the trip buckle on the trip buckle, when a circuit is required to be broken off during normal operation of the circuit breaker, the moving range of an upper connecting rod connected with the cross bar can be limited by the cross bar because the re-buckling end of the trip buckle is relatively fixed; and when heavy short-circuit current is broken, the moving range of the upper connecting rod connected with the cross bar can be widened, further the distance is increased, electric arc can be elongated for facilitating the breaking and the breaking capacity of the circuit breaker can be increased. The distance is small during normal breaking, and thus the breaking speed of the circuit breaker can be increased.
Description
technical field [0001] The invention belongs to a molded case circuit breaker, in particular to a molded case circuit breaker capable of realizing opening with different opening distances. Background technique [0002] When the circuit breaker is in the opening state, the distance between the moving and static contacts is called the opening distance. The size of the opening distance determines the breaking capacity of the circuit breaker. When a short-circuit fault occurs in the line and the short-circuit current reaches the action setting value, the circuit breaker opens and cuts off the line to play a protective role. The circuit breaker will generate an arc during the breaking process. The greater the short-circuit current, the greater the opening distance required by the circuit breaker. At this time, the longer the arc is drawn between the moving and static contacts, it is equivalent to connecting an arc resistor in series. The longer the arc and the greater the resis...
Claims
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Inventor 史祺暴凤蓉宋秀荣
Owner TIANJIN BAILI ELECTRIC CO LTD