CN211907370U - High-breaking molded case circuit breaker - Google Patents
High-breaking molded case circuit breaker Download PDFInfo
- Publication number
- CN211907370U CN211907370U CN202020976849.3U CN202020976849U CN211907370U CN 211907370 U CN211907370 U CN 211907370U CN 202020976849 U CN202020976849 U CN 202020976849U CN 211907370 U CN211907370 U CN 211907370U
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- Prior art keywords
- contact
- piece
- static contact
- contact piece
- circuit breaker
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
The utility model relates to a high section moulded case circuit breaker that divides, including base, upper cover, operating device, contact system, conductive system, arc-extinguish chamber, the contact system include with operating device linkage complex moving contact, set up in the base and with moving contact matched with static contact, the static contact include static contact, stationary contact, the one end of static contact wiring portion has, be provided with the wiring hole in this wiring portion, wiring downthehole being provided with the wiring bolt, the other end of static contact have and be hooked type contact piece, the striking portion that extends to arc-extinguish chamber direction bending has on the afterbody of contact piece, wiring portion, contact piece, striking portion formula structure as an organic whole, the stationary contact set up on the up end of the one end of contact piece, the other end of contact piece on correspond the below department of stationary contact and be provided with the magnetic sheet that increases. The utility model has the advantages of compact structure, small volume, stable and reliable performance.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to high branch divides disconnected moulded case circuit breaker.
Background
The molded case circuit breaker is widely applied to the departments of industry and agriculture, traffic, mines, civil buildings, national defense and the like, plays a great role in the transmission and distribution of electric power and the protection of motors, and is a product with large use amount and wide use range in low-voltage electric appliances. A molded case circuit breaker is a switching device capable of closing, carrying, and opening a current under a normal circuit condition, and closing, carrying, and opening a current under an abnormal circuit condition (including a short-circuit condition) within a prescribed time. The molded case circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, and automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur. The existing molded case circuit breaker comprises a base, an upper cover, an operating mechanism, a contact system, a conductive system and an arc extinguishing cover, and the contact system of the existing molded case circuit breaker is unreasonable in structural design, so that the molded case circuit breaker is poor in arc extinguishing performance and breaking capacity. And the molded case circuit breaker has the defects of unreliable performance and complex structure.
Disclosure of Invention
An object of the utility model is to overcome prior art's defect, provide a compact structure, small, the reliable and stable performance's disconnected moulded case circuit breaker of high branch.
In order to achieve the purpose, the utility model adopts a high-breaking molded case circuit breaker, which comprises a base, an upper cover, an operating mechanism, a contact system, a conductive system and an arc-extinguishing cover, the contact system comprises a moving contact matched with the operating mechanism in a linkage way, and a static contact which is arranged in the base and matched with the moving contact, the static contact comprises a static contact piece and a static contact, one end of the static contact piece is provided with a wiring part, the wiring part is provided with a wiring hole, a wiring bolt is arranged in the wiring hole, the other end of the static contact piece is provided with a hook-shaped contact piece, the tail part of the contact piece is provided with an arc striking part which is bent and extended towards the direction of the arc extinguishing cover, the wiring portion, the contact piece and the arc striking portion are of an integrated structure, the static contact is arranged on the upper end face of one end of the contact piece, and the magnetism increasing sheet is arranged on the other end of the contact piece and below the static contact.
The beneficial effect of above-mentioned structure does: the contact part of the static contact of the molded case circuit breaker is internally provided with the magnetism increasing sheet, when the circuit breaker is broken, the repulsion force of the moving contact is enhanced, the breaking capacity of the molded case circuit breaker is favorably improved, the static contact is provided with the arc striking part, and the arc striking part can rapidly introduce electric arc into the arc extinguishing cover, so that the electric arc is favorably and rapidly extinguished, and the arc extinguishing effect of the molded case circuit breaker is favorably enhanced. Therefore, the molded case circuit breaker has the advantages of compact structure, small volume and stable and reliable performance.
Particularly, the contact sheet is provided with V-shaped abdicating grooves corresponding to the two sides of the static contact respectively. The stepping groove is formed in the contact sheet, when electric arcs are generated between the moving contact and the static contact, the magnetic increasing sheet can stretch the electric arcs through the stepping groove, rapid extinguishing of the electric arcs is facilitated, and breaking capacity of the molded case circuit breaker is improved.
Particularly, an arc isolating plate is arranged on one side of the movable contact corresponding to the movable contact, and the movable contact and the contact frame are separated on two sides by the arc isolating plate. The arc isolation plate can play a role in cutting electric arcs, and the root of the moving contact can be prevented from generating electric arcs, so that the arc extinguishing effect of the molded case circuit breaker can be improved.
Particularly, the base is provided with a screw corresponding to the static contact piece, and the screw sequentially penetrates through the contact pieces of the static contact piece and is connected to the magnetism increasing piece. The static contact and the magnetism increasing sheet can be fixed in the base at one time through the screws, and the assembly efficiency is improved.
Drawings
Fig. 1 is an internal structure diagram of the embodiment of the present invention.
Fig. 2 is a front view of a static contact according to an embodiment of the present invention.
Fig. 3 is a top view of a static contact according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, an embodiment of the present invention is a high breaking molded case circuit breaker, including a base 10, an upper cover 11, an operating mechanism 12, a contact system 20, a conductive system 13, and an arc extinguishing chamber 14, where the contact system 20 includes a movable contact 21 cooperating with the operating mechanism 12, and a fixed contact 22 disposed in the base 10 and cooperating with the movable contact 21, the fixed contact 22 includes a fixed contact 221 and a fixed contact 222, one end of the fixed contact 221 has a wiring portion 223, the wiring portion 223 is provided with a wiring hole 224, a wiring bolt 225 is disposed in the wiring hole 224, the other end of the fixed contact 221 has a hook-shaped contact piece 226, the tail portion of the contact piece 226 has an arc striking portion 227 extending in a bending direction toward the arc extinguishing chamber 14, the wiring portion 223, the contact piece 226, and the arc striking portion 227 are of an integral structure, the fixed contact 222 is disposed on an upper end face of one end of the contact piece 226, a magnetizing sheet 228 is disposed below the stationary contact 222 at the other end of the contact sheet 226.
As shown in fig. 2 and 3, the contact piece 226 is provided with a V-shaped relief groove 229 at two sides corresponding to the stationary contact 222. The stepping groove is formed in the contact sheet, when electric arcs are generated between the moving contact and the static contact, the magnetic increasing sheet can stretch the electric arcs through the stepping groove, rapid extinguishing of the electric arcs is facilitated, and breaking capacity of the molded case circuit breaker is improved. An arc isolating plate 212 is arranged on one side of the moving contact 21 corresponding to the moving contact 211, and the moving contact 211 and the contact frame 121 are separated on two sides by the arc isolating plate 212. The arc isolation plate can play a role in cutting electric arcs, and the root of the moving contact can be prevented from generating electric arcs, so that the arc extinguishing effect of the molded case circuit breaker can be improved. The base 10 is provided with a screw 101 corresponding to the static contact 221, and the screw 101 sequentially passes through the contact piece 226 of the static contact 221 and is connected to the magnetism increasing piece 228. The static contact and the magnetism increasing sheet can be fixed in the base at one time through the screws, and the assembly efficiency is improved.
The contact part of the static contact of the molded case circuit breaker is internally provided with the magnetism increasing sheet, when the circuit breaker is broken, the repulsion force of the moving contact is enhanced, the breaking capacity of the molded case circuit breaker is favorably improved, the static contact is provided with the arc striking part, and the arc striking part can rapidly introduce electric arc into the arc extinguishing cover, so that the electric arc is favorably and rapidly extinguished, and the arc extinguishing effect of the molded case circuit breaker is favorably enhanced. Therefore, the molded case circuit breaker has the advantages of compact structure, small volume and stable and reliable performance.
Claims (4)
1. The utility model provides a high breaking moulded case circuit breaker, includes base, upper cover, operating device, contact system, conducting system, arc-extinguishing chamber, its characterized in that: the contact system comprises a moving contact matched with the operating mechanism in a linkage mode and a static contact arranged in the base and matched with the moving contact, the static contact comprises a static contact piece and a static contact, one end of the static contact piece is provided with a wiring portion, a wiring hole is formed in the wiring portion, a wiring bolt is arranged in the wiring hole, the other end of the static contact piece is provided with a hook-shaped contact piece, an arc striking portion bent and extending towards the arc extinguishing cover is arranged on the tail portion of the contact piece, the wiring portion, the contact piece and the arc striking portion are of an integrated structure, the static contact is arranged on the upper end face of one end of the contact piece, and a magnetism increasing piece is arranged at the position, corresponding to the lower portion of the static contact, of the other end of the contact piece.
2. The high breaking molded case circuit breaker according to claim 1, wherein: and the contact sheet is provided with V-shaped yielding grooves corresponding to the two sides of the static contact respectively.
3. The high breaking molded case circuit breaker according to claim 1 or 2, wherein: and an arc isolating plate is arranged on one side of the movable contact corresponding to the movable contact, and separates the movable contact and the contact frame at two sides.
4. The high breaking molded case circuit breaker according to claim 1 or 2, wherein: the base is provided with a screw corresponding to the static contact piece, and the screw sequentially penetrates through the contact piece of the static contact piece and is connected to the magnetism increasing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020976849.3U CN211907370U (en) | 2020-06-01 | 2020-06-01 | High-breaking molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020976849.3U CN211907370U (en) | 2020-06-01 | 2020-06-01 | High-breaking molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211907370U true CN211907370U (en) | 2020-11-10 |
Family
ID=73270332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020976849.3U Active CN211907370U (en) | 2020-06-01 | 2020-06-01 | High-breaking molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211907370U (en) |
-
2020
- 2020-06-01 CN CN202020976849.3U patent/CN211907370U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 325604 West Lake Village, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee after: Zhejiang Hongkun Electric Group Co.,Ltd. Address before: 325600 no.252, Lingyun Road, fangdouyan village, Liushi Town, Yueqing City, Wenzhou City, Zhejiang Province Patentee before: Zhejiang Hongkun Electric Co.,Ltd. |
|
| CP03 | Change of name, title or address |