An operating mechanism of a miniature circuit breaker
A small circuit breaker and operating mechanism technology, applied in the direction of protection switch operation/release mechanism, circuit, parts of protection switch, etc., can solve problems such as unstable tripping performance, and achieve stable tripping performance, force balance, The effect of ensuring reliability
Active Publication Date: 2020-08-07
合兴集团有限公司
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- Description
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- Application Information
AI Technical Summary
Problems solved by technology
[0010] Therefore, the technical problem to be solved by the present invention is to overcome the defect of unstable tripping performance of the circuit breaker operating mechanism in the prior art, thereby providing a small circuit breaker operating mechanism with stable tripping performance
Method used
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Embodiment 1
[0072] like Figure 1-6 Shown is a specific implementation of the operating mechanism of a small circuit breaker, including a housing, a control mechanism, a sleeve, a contact bracket 13, a first biasing member, a second biasing member, and a tripping mechanism.
[0073] The housing is fixed with a central shaft 14, the sleeve is sleeved on the central shaft 14, the contact bracket 13 is rotatably arranged on the sleeve, and the contact bracket 13 is There is a movable contact 7, the first biasing member is arranged between the contact bracket 13 and the housing, the tripping mechanism is rotatably arranged on the sleeve, and the contact The head bracket 13 is buckled together to form a fastener; when closing, the trip mechanism drives the contact bracket 13 to rotate until the moving contact 7 is in contact with the static contact under the drive of the control mechanism; When the brake is on, the tripping mechanism is tripped under the driving of the control mechanism, and ...
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The invention provides a small-size circuit breaker operation mechanism. The mechanism includes: a housing which is fixedly provided with a center shaft thereon; a control mechanism; a sleeve which sleeves the center pin; a contact rack which is rotarily disposed on the sleeve and is provided with a dynamic contact; a first bias voltage member which is disposed between the contact rack and the housing; a release mechanism which is rotarily disposed on the sleeve and buckles the contact rack to form a buckle member. Upon circuit closing, the release mechanism is driven by the control mechanismto drive the contact rack to rotate until the dynamic contact and a static contact are brought into contact. Upon circuit opening, the release mechanism is driven by the control mechanism to release.The contact rack rotates around the sleeve under the bias voltage force of the first bias voltage member until the contact rack is separated from the static contact. The sleeve is arranged such that the center pin does not rotate along with the sleeve, and the release performance is stable.
Description
technical field [0001] The invention relates to the technical field of low-voltage electrical appliances in electric power systems, in particular to an operating mechanism of a small circuit breaker. Background technique [0002] Miniature circuit breakers refer to protective appliances installed on terminal distribution lines, mainly used for overload and circuit breaker protection of lines and electrical equipment. Suitable for AC 50 / 60Hz, rated voltage not exceeding 400V, rated current not exceeding 125A. [0003] A miniature circuit breaker is generally composed of electromagnetic tripping system, thermal tripping system, arc extinguishing system, operating mechanism, etc., and the operating mechanism refers to the components used to open and close the circuit breaker. The operating mechanism must ensure that the circuit breaker is closed reliably. It is also necessary to ensure that the circuit breaker is quickly opened in a fault state, and the performance of the oper...
Claims
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IPC IPC(8): H01H71/10H01H71/12
CPCH01H71/1054H01H71/12H01H71/121
Inventor张利伟黄大初张敏峰张磊梁力文蒋小武李佳欢李军辉
Owner合兴集团有限公司