Drop-proof single-breakpoint contact operating mechanism
An operating mechanism, single-breakpoint technology, applied in the direction of contacts, contact meshing, electrical components, etc., can solve problems such as affecting the breaking of circuit breakers, and achieve the effect of improving electrical life and breaking capacity
Inactive Publication Date: 2015-08-26
无锡新宏泰电器科技股份有限公司
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Problems solved by technology
[0004] The purpose of the present invention is to provide an anti-drop single-break point contact operating mechanism to solve the problem in the prior art that the contact operating mechanism affects the breaking of the circuit breaker due to the contact drop phenomenon
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[0018] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0019] see Figure 1 to Figure 4 As shown, in this embodiment, an anti-drop single break point contact operating mechanism includes a static contact 1, a rotating shaft 2 and a moving contact 3, the static contact 1 is fixed on the circuit breaker base, and the The rotating shaft 2 has an accommodating cavity 4 that runs through the entire rotating shaft. A first fixing pin 5 and a second fixing pin 6 are arranged in the accommodating cavity 4 on the rotating shaft 2. The second fixing pin 6 is arranged on the Below the first fixed pin 5, one end of the movable contact 3 is rotatably arranged on the first fixed pin 5, and two contact torsion springs 7 are sheathed on the second fixed pin 6, The movable contact 3 is provided with a convex portion 8 with a smooth curved surface, and the convex portio...
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The invention discloses a drop-proof single-breakpoint contact operating mechanism which comprises a rotating shaft and a moving contact. The rotating shaft includes an accommodating chamber which penetrates the whole rotating shaft, the accommodating chamber is internally provided with a first fixed pin and a second fixed pin, one end of the moving contact is rotatably arranged on the first fixed pin, the second fixed pin is sleeved with a contact torsion spring, the moving contact is provided with a projection portion with a smooth curved surface, a movable pin is fixed to the projection portion, one end of the contact torsion spring is connected to the rotating shaft, the other end of the contact torsion spring abuts against the movable pin, and the rotating shaft is provided with a limiting projection. The drop-proof single-breakpoint contact operating mechanism can prevent the contact from moving from the opening position to the closing position with decrease of electrodynamic force, namely, a called contact drop phenomenon; and the service life of a circuit breaker is prolonged, the disconnecting capability of the breaker is improved, and the performance of the breaker can better satisfy requirements for modern distribution network.
Description
technical field [0001] The invention relates to a contact operating mechanism, in particular to an anti-drop single-break point contact operating mechanism for a circuit breaker. Background technique [0002] Molded case circuit breakers are branch-level power distribution appliances of power distribution systems. With the continuous increase of grid capacity and the needs of centralized power distribution, the system requires higher and higher breaking capacity, so the current-limiting contact structure has been used in plastic case Widely used in circuit breakers. However, the repelling force of the contacts of the current-limiting single-break point structure depends on the current passing through the contacts, that is, when the current value increases to a certain value, the dynamic and static contacts will be in the loop electromotive force and node electromotive force. At this time, the resistance between the contacts increases rapidly and the periodic change of the A...
Claims
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Login to View More IPC IPC(8): H01H1/22
CPCH01H1/221H01H2001/223
Inventor 赵寅海尤凯伦赵敏海
Owner 无锡新宏泰电器科技股份有限公司