CN217035573U - Contact system of circuit breaker - Google Patents
Contact system of circuit breaker Download PDFInfo
- Publication number
- CN217035573U CN217035573U CN202220787377.6U CN202220787377U CN217035573U CN 217035573 U CN217035573 U CN 217035573U CN 202220787377 U CN202220787377 U CN 202220787377U CN 217035573 U CN217035573 U CN 217035573U
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- contact
- arc striking
- arc
- static contact
- circuit breaker
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Abstract
The utility model relates to a contact system of a circuit breaker, which comprises a contact frame, a moving contact and a static contact, wherein the contact frame is rotatably arranged in a shell, the moving contact is in linkage fit with the contact frame, the static contact is arranged in the shell and is matched with the moving contact, the static contact is arranged on the static contact and is matched with the moving contact, one end of the static contact extends towards an electromagnetic tripping mechanism and is connected to a coil of the electromagnetic tripping mechanism, the other end of the static contact is provided with an arc striking part which is bent and extends towards an arc extinguishing chamber, and one side of the static contact, which faces the arc striking part, is provided with an arc striking step which is contacted with the static contact. The arc extinguishing device has the advantages of simple structure, stable and reliable performance, convenience in assembly, long service life and good arc extinguishing performance.
Description
Technical Field
The utility model relates to the technical field of circuit breakers, in particular to a contact system of a circuit breaker.
Background
The miniature circuit breaker is also called a miniature circuit breaker, is suitable for overload and short-circuit protection of a line with rated voltage of 230/400V and rated current of 50/60Hz and 63A of alternating current, and can also be used for infrequent operation and conversion of the line under normal conditions. The miniature circuit breaker is mainly used in various places such as industrial, commercial, high-rise and civil houses. The miniature circuit breaker comprises a shell, an operating mechanism, a contact system, an electromagnetic tripping mechanism and the electromagnetic tripping mechanism, the static contact of the existing contact system is unreasonable in structural design, electric arcs cannot be rapidly introduced into an arc extinguishing chamber, the arc extinguishing effect is poor, the service life of the contact system is short, and the contact system of the circuit breaker also has the defects of complex structure, unreliable performance and inconvenient assembly.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides the contact system of the circuit breaker, which has the advantages of simple structure, stable and reliable performance, convenience in assembly, long service life and good arc extinguishing performance.
In order to achieve the purpose, the utility model adopts a contact system of a circuit breaker, which comprises a contact head frame rotationally arranged in a shell, a movable contact matched with the contact head frame in a linkage manner, and a fixed contact arranged in the shell and matched with the movable contact, wherein a fixed contact matched with the movable contact is arranged on the fixed contact, one end of the fixed contact extends towards the direction of an electromagnetic tripping mechanism and is connected to a coil of the electromagnetic tripping mechanism, the other end of the fixed contact is provided with an arc striking part bent and extended towards the arc extinguishing chamber, and one side of the fixed contact, which faces the arc striking part, is provided with an arc striking step contacted with the fixed contact.
The beneficial effect of above-mentioned structure is: the arc striking step matched with the static contact is arranged on the static contact and can introduce electric arcs on the static contact into the arc extinguishing chamber through the arc striking part, so that the electric arcs can be quickly extinguished, the static contact is connected with the coil, and the static contact and the electromagnetic tripping mechanism are integrated and modularized, so that the assembly is more convenient. Therefore, the contact system of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, long service life and good arc extinguishing performance.
Particularly, the height of the arc striking step is the same as that of the fixed contact, and the height of the arc striking step is gradually reduced from the fixed contact to the arc striking part. The height of the arc striking step is the same as that of the stationary contact, the arc striking step can quickly introduce electric arcs into the arc extinguishing chamber, and the stationary contact with the structural design has better arc extinguishing performance.
Particularly, a clamping groove is formed in the shell corresponding to the arc striking portion and located right above the arc extinguishing chamber, and the arc striking portion is clamped in the clamping groove and forms clamping fit of the arc striking portion and the shell. The arc striking part and the shell are assembled in a clamping matching mode, so that the static contact and the shell are conveniently assembled, and the assembly is more convenient.
Drawings
Fig. 1 is a perspective view of an internal structure of an embodiment of the present invention.
FIG. 2 is a front view of the internal structure of the embodiment of the present invention.
Fig. 3 is a perspective view of a stationary 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 contact system of a circuit breaker, including a contact holder 11 rotatably disposed in a housing 10, a movable contact 12 cooperating with the contact holder 11 in a linkage manner, and a stationary contact 13 disposed in the housing 10 and cooperating with the movable contact 12, wherein a stationary contact 131 cooperating with the movable contact 12 is disposed on the stationary contact 13, one end of the stationary contact 13 extends toward an electromagnetic trip mechanism 20 and is connected to a coil 21 of the electromagnetic trip mechanism 20, the other end of the stationary contact 13 has an arc striking portion 132 bending and extending toward an arc extinguishing chamber 22, and an arc striking step 133 contacting with the stationary contact 131 is disposed on one side of the stationary contact 13 facing the arc striking portion 132. The height of the arc-striking step 133 is the same as the height of the stationary contact 131, and the height of the arc-striking step 133 gradually decreases from the stationary contact 131 toward the arc-striking portion 132. The height of the arc striking step is the same as that of the stationary contact, the arc striking step can quickly introduce electric arcs into the arc extinguishing chamber, and the stationary contact with the structural design has better arc extinguishing performance. The shell 10 is provided with a clamping groove 101 corresponding to the arc striking part 132, the clamping groove 101 is located right above the arc extinguishing chamber 22, and the arc striking part 132 is clamped in the clamping groove 101 and forms clamping fit of the arc striking part 132 and the shell 10. The arc striking part and the shell are assembled in a clamping matching mode, so that the static contact and the shell are conveniently assembled, and the assembly is more convenient.
The arc striking step matched with the static contact is arranged on the static contact and can introduce electric arcs on the static contact into the arc extinguishing chamber through the arc striking part, so that the electric arcs can be quickly extinguished, the static contact is connected with the coil, and the static contact and the electromagnetic tripping mechanism are integrated and modularized, so that the assembly is more convenient. Therefore, the contact system of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and rapidness in assembly, long service life and good arc extinguishing performance.
Claims (3)
1. The utility model provides a contact system of circuit breaker, including rotate the contact frame that sets up in the casing, with contact frame linkage complex moving contact, set up in the casing and with moving contact matched with static contact, its characterized in that: the static contact on be provided with moving contact matched with stationary contact, static contact one end extend to electromagnetism tripping device direction and connect on electromagnetism tripping device's coil, the static contact other end have the arc striking portion of bending the extension to the explosion chamber direction, the static contact go to be provided with the arc striking step that contacts with stationary contact on one side of arc striking portion.
2. The contact system of a circuit breaker of claim 1, wherein: the height of the arc striking step is the same as that of the stationary contact, and the height of the arc striking step is gradually reduced from the stationary contact to the arc striking part.
3. The contact system of a circuit breaker according to claim 1 or 2, wherein: the arc striking device is characterized in that a clamping groove is formed in the shell and corresponds to the arc striking part, the clamping groove is located right above the arc extinguishing chamber, and the arc striking part is clamped in the clamping groove and is in clamping fit with the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220787377.6U CN217035573U (en) | 2022-04-06 | 2022-04-06 | Contact system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220787377.6U CN217035573U (en) | 2022-04-06 | 2022-04-06 | Contact system of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217035573U true CN217035573U (en) | 2022-07-22 |
Family
ID=82413780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220787377.6U Active CN217035573U (en) | 2022-04-06 | 2022-04-06 | Contact system of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217035573U (en) |
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2022
- 2022-04-06 CN CN202220787377.6U patent/CN217035573U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |