Clapping type instantaneous protection mechanism of small-sized circuit breaker
A small circuit breaker and protection mechanism technology, which is applied in the direction of protection switch operation/release mechanism, protection switch, emergency protection device, etc., can solve the problem of increasing the coil to expand the volume of the circuit breaker, and achieve the effect of avoiding the volume of the circuit breaker
Inactive Publication Date: 2017-10-03
SHANGHAI LIANGXIN ELECTRICAL
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Problems solved by technology
[0004] The purpose of the present invention is to provide a snap-in instantaneous protection mechanism for small circuit breakers in view of the technical defect that the existing small circuit breaker snap-in transient protection mechanism is a coil type and needs to increase the volume of the circuit breaker with the increase of the frame level. , no need for a coil to generate a magnetic field when the current passes through to achieve short-circuit protection
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[0021] as attached figure 1 with 2 As shown, a small circuit breaker clapping type instantaneous protection mechanism, which includes a conductive plate 1, the conductive plate 1 and the yoke 2 are assembled together, and the magnetic yoke 2 can generate a magnetic field when a changing current passes through the conductive plate 1, An armature 3 is arranged above the yoke 2, and the armature 3 can rotate around the armature shaft 4 under the action of the magnetic field generated by the yoke 2. The armature shaft 4 is installed on the circuit breaker casing and passes through the shaft hole on the armature 3. The armature 3 is connected with a return spring 5 to make it reset, and the armature 3 is provided with a lock and unlock part 301 .
[0022] One end of the return spring 5 is contained in the attached Figure 5 In the mounting hole of the armature 3 shown, the other end is installed in the Image 6 In the hanging hole of the shown spring hanger 6, the spring hanger ...
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Disclosed is a clapping type instantaneous protection mechanism of a small-sized circuit breaker. The clapping type instantaneous protection mechanism comprises a conductive plate (1); the clapping type instantaneous protection mechanism is characterized in that the conductive plate (1) and a magnet yoke (2) are mounted together; when a changeable current passes through the conductive plate (1), the magnet yoke (2) can generate a magnetic field; an armature (3) is arranged above the magnet yoke (2); the armature (3) can rotate around an armature shaft (4) under the magnetic field effect generated by the magnet yoke (2); the armature (3) is connected with a reset spring (5) for resetting the armature; and the armature (3) is provided with a lock catch unlocking part (301). The magnetic field can be generated when the current passes through without adopting a coil, so that a short circuit protection function is realized; and the shortcoming that the volume of the circuit breaker needs to be enlarged by increasing coils along with improvement of the shell frame level can be avoided.
Description
technical field [0001] The invention belongs to the technical field of the internal structure of a circuit breaker, and in particular relates to a snap-on instantaneous protection mechanism for a small circuit breaker. Background technique [0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breaker, also known as automatic switch, commonly known as "air switch", also refers to low-voltage circuit breaker. It is an electrical appliance that not only has the function of manual switch, but also can automatically protect against voltage loss, undervoltage, overload, and short circuit. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, etc., and can automatically cut off the circuit when they have severe overload, short circuit and undervoltage faults. Its function is equivalent to a fuse switch and The comb...
Claims
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IPC IPC(8): H01H71/24
CPCH01H71/2472
Inventor 冯洪宝杨艳群陈妍儒张伟王松涛曹文渠潘万军
Owner SHANGHAI LIANGXIN ELECTRICAL