CN112614765A - Static contact arc extinguishing module of circuit breaker - Google Patents
Static contact arc extinguishing module of circuit breaker Download PDFInfo
- Publication number
- CN112614765A CN112614765A CN202011488549.1A CN202011488549A CN112614765A CN 112614765 A CN112614765 A CN 112614765A CN 202011488549 A CN202011488549 A CN 202011488549A CN 112614765 A CN112614765 A CN 112614765A
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- CN
- China
- Prior art keywords
- arc
- arc extinguishing
- static contact
- contact
- circuit breaker
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
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- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to a static contact arc extinguishing module of a circuit breaker, which comprises a static contact, an arc extinguishing chamber and a wiring board, wherein one end of the static contact is provided with a contact part matched with a moving contact, the contact part is provided with a static contact, the other end of the static contact is bent and extended towards the direction of the wiring board and is provided with two conductive parts in a square frame shape, a containing cavity is formed between the two conductive parts, the arc extinguishing chamber is arranged in the containing cavity, one end of the wiring board is bent and extended and is provided with a wiring part, the wiring part is provided with a wiring hole, the other end of the wiring board is bent and extended towards the outer sides of the two conductive parts respectively and is provided with two connecting parts in a square frame shape, and the two connecting parts are. The arc extinguishing device has the advantages of simple structure, stable and reliable performance, convenience in assembly, good arc extinguishing effect, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a static contact arc extinguishing module of a circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker has overload, short circuit and under-voltage protection functions, can protect lines and power supply equipment from being damaged, and can protect fire hazards possibly caused by long-term grounding faults which cannot be detected by overcurrent protection. The moulded case circuit breaker includes plastic casing, operating device, contact system, arc extinguishing system, and current moulded case circuit breaker's arc extinguishing system structural design is unreasonable, and the atress area of electric arc is less, and magnetic field is more weak, only can receive the effect of lorentz power at the electric arc that is close to static contact and moving contact department, and the arc extinguishing effect is relatively poor, and the contact is burnt easily to lead to the breaking capacity of circuit breaker less than.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the static contact arc extinguishing module of the circuit breaker, which has the advantages of simple structure, stable and reliable performance, convenience in assembly, good arc extinguishing effect, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker.
In order to achieve the purpose, the invention adopts a fixed contact arc extinguishing module of a circuit breaker, which comprises a fixed contact, an arc extinguishing chamber arranged in the fixed contact and a wiring board connected with the fixed contact, wherein one end of the fixed contact is provided with a contact part matched with a movable contact, the fixed contact is arranged on the contact part, the other end of the fixed contact is bent and extended towards the wiring board and is formed with two square frame-shaped conductive parts, an accommodating cavity is formed between the two conductive parts, the arc extinguishing chamber is arranged in the accommodating cavity, one end of the wiring board is bent and extended and is formed with a wiring part, the wiring part is provided with a wiring hole, the other end of the wiring board is bent and extended towards the outer sides of the two conductive parts respectively and is formed with two square frame-shaped connecting parts, and the two connecting parts are electrically connected with.
The beneficial effect of above-mentioned structure is: the static contact and the wiring board of the static contact arc extinguishing module are respectively provided with the conductive parts and the connecting parts which are distributed on two sides of the arc extinguishing chamber, the conductive parts and the connecting parts are in a square frame shape, the whole electric arc can be wrapped in a magnetic field generated by the static contact through the conductive parts and the connecting parts in the square frame shape, when the breaker is disconnected, the electric arc can be fully acted by the Lorentz force, the stress area of the electric arc is effectively increased, the magnetic field is strong, the arc extinguishing effect is favorably enhanced, and the disconnection capability of the breaker is greatly improved. Therefore, the static contact arc extinguishing module of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, good arc extinguishing effect, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker.
Particularly, the arc extinguishing cover comprises two arc barriers and a plurality of arc extinguishing grid pieces arranged between the two arc barriers at one side corresponding to the fixed contact, the arc extinguishing grid pieces are arranged between the two arc barriers at intervals in an arc shape, arc striking grooves are formed in the arc extinguishing grid pieces, and arc striking channels are formed among the arc striking grooves of the arc extinguishing grid pieces. The arc extinguishing bars are arranged on one side of the static contact, so that the length of the arc extinguishing bars is not more than the position of the moving contact and the static contact, a magnetic field can directly pass through an arc area, and the arc extinguishing bars cannot shield the magnetic field passing through the arc area, thereby being beneficial to improving the arc extinguishing performance of the static contact arc extinguishing module.
Particularly, one end of one of the arc extinguishing grids of the arc extinguishing cover bends and extends towards the direction of the stationary contact and forms an arc striking angle. The arc striking angle can lead the electric arc into the arc extinguishing chamber quickly, which is beneficial to the quick extinguishing of the electric arc.
Particularly, two arc isolating plates of the arc extinguishing chamber are respectively provided with an iron core corresponding to the conductive part and the connecting part. The iron core can increase magnetic permeability, and is beneficial to improving the arc extinguishing performance of the static contact arc extinguishing module.
Particularly, two flash barriers on be provided with respectively with the appearance assorted draw-in groove of iron core, the iron core block in the draw-in groove, and constitute the joint cooperation of iron core and flash barriers. The iron core and the arc isolation plate are connected in a clamping matching mode, so that the arc isolation plate and the iron core are convenient to assemble, and the assembly efficiency of the static contact arc extinguishing module is improved.
Drawings
FIG. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is an exploded view of an embodiment of the present invention.
FIG. 3 is a top view of an embodiment of the present invention.
Fig. 4 is an assembly view of a fixed contact and a wiring board according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 5, an embodiment of the invention is a static contact arc extinguishing module of a circuit breaker, including a static contact 10, an arc extinguishing chamber 20 disposed in the static contact 10, and a wiring board 30 connected to the static contact 10, wherein one end of the static contact 10 has a contact portion 11 matched with a movable contact 40, the contact part 11 is provided with a static contact 12, the other end of the static contact 10 is bent and extended towards the wiring board 30 and is formed with two conductive parts 13 in a square frame shape, a containing cavity 100 is formed between the two conductive parts 13, the arc extinguishing chamber 20 is arranged in the accommodating cavity 100, one end of the wiring board 30 is bent and extended and is provided with a wiring part 31, the wiring portion 31 is provided with a wiring hole 32, the other end of the wiring board 30 is bent and extended to the outer sides of the two conductive portions 13, and two connection portions 33 in a square frame shape are formed, and the two connection portions 33 are electrically connected to the two conductive portions 13, respectively. The tail portions of the two connection portions 33 are soldered to the tail portions of the two conductive portions 13, respectively.
As shown in fig. 2, the arc-extinguishing cover 20 includes two arc-isolating plates 21, and a plurality of arc-extinguishing bars 22 disposed between the two arc-isolating plates 21 and corresponding to one side of the stationary contact 10, the plurality of arc-extinguishing bars 22 are arranged between the two arc-isolating plates 21 at intervals in an arc shape, arc-striking grooves 221 are disposed on the plurality of arc-extinguishing bars 22, and arc-striking channels 222 are formed between the arc-striking grooves 221 of the plurality of arc-extinguishing bars 22. The arc extinguishing bars are arranged on one side of the static contact, so that the length of the arc extinguishing bars is not more than the position of the moving contact and the static contact, a magnetic field can directly pass through an arc area, and the arc extinguishing bars cannot shield the magnetic field passing through the arc area, thereby being beneficial to improving the arc extinguishing performance of the static contact arc extinguishing module. One end of one arc extinguishing grid piece 22 of the arc extinguishing cover 20 bends and extends towards the direction of the fixed contact 12, and an arc striking angle 223 is formed. The arc striking angle can lead the electric arc into the arc extinguishing chamber quickly, which is beneficial to the quick extinguishing of the electric arc. The two arc isolating plates 21 of the arc-extinguishing chamber 20 are respectively provided with an iron core 34 corresponding to the conductive part 13 and the connecting part 33. The iron core can increase magnetic permeability, and is beneficial to improving the arc extinguishing performance of the static contact arc extinguishing module. Two flash barriers 21 on be provided with respectively with iron core 34's appearance assorted draw-in groove 211, iron core 34 block in draw-in groove 211, and constitute iron core 34 and flash barriers 21's joint cooperation. The iron core and the arc isolation plate are connected in a clamping matching mode, so that the arc isolation plate and the iron core are convenient to assemble, and the assembly efficiency of the static contact arc extinguishing module is improved.
The static contact and the wiring board of the static contact arc extinguishing module are respectively provided with the conductive parts and the connecting parts which are distributed on two sides of the arc extinguishing chamber, the conductive parts and the connecting parts are in a square frame shape, the whole electric arc can be wrapped in a magnetic field generated by the static contact through the conductive parts and the connecting parts in the square frame shape, when the breaker is disconnected, the electric arc can be fully acted by the Lorentz force, the stress area of the electric arc is effectively increased, the magnetic field is strong, the arc extinguishing effect is favorably enhanced, and the disconnection capability of the breaker is greatly improved. Therefore, the static contact arc extinguishing module of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, good arc extinguishing effect, capability of effectively prolonging the service life of the circuit breaker and improving the breaking capacity of the circuit breaker. As shown in fig. 4 and 5, the current (I) flows from the wiring portion of the wiring board to the connection portion of the wiring board, the conductive portion of the fixed contact, and reaches the fixed contact, at this time, the arc (E) generated by the fixed contact 12 and the movable contact 40 (E is covered by the magnetic field, and according to the lorentz force left-hand rule, the arc (E) at the time of breaking is subjected to the electric power (F facing the arc extinguishing chamber, as shown in the figure), thereby facilitating the rapid extinguishing of the arc and improving the breaking capacity of the circuit breaker.
Claims (5)
1. The utility model provides a static contact arc extinguishing module of circuit breaker, includes the static contact, sets up the explosion chamber in the static contact, the wiring board that is connected with the static contact, its characterized in that: the one end of static contact have with moving contact matched with contact site, be provided with the stationary contact on this contact site, the other end of static contact bend to the wiring board direction and extend and be formed with two conductive parts that are the square frame form, be formed with the holding chamber between two conductive parts, the explosion chamber set up in the holding intracavity, the one end of wiring board bend and extend and be formed with wiring portion, be provided with the wiring hole on this wiring portion, the other end of wiring board bend respectively to the outside of two conductive parts and extend and be formed with two connecting portion that are the square frame form, and two connecting portion are connected with two conductive parts electricity respectively.
2. The static contact arc extinguishing module of the circuit breaker of claim 1, characterized in that: the arc extinguishing cover comprises two arc barriers and a plurality of arc extinguishing grid pieces, wherein the arc extinguishing grid pieces are arranged between the two arc barriers at one side corresponding to the fixed contact, are distributed between the two arc barriers at intervals in an arc shape, arc striking grooves are formed in the arc extinguishing grid pieces, and arc striking channels are formed between the arc striking grooves of the arc extinguishing grid pieces.
3. The static contact arc extinguishing module of the circuit breaker of claim 2, characterized in that: one end of one of the arc extinguishing grid pieces of the arc extinguishing cover bends and extends towards the direction of the stationary contact and forms an arc striking angle.
4. The static contact arc extinguishing module of the circuit breaker according to claim 1 or 2, characterized in that: and the two arc isolating plates of the arc extinguishing cover are respectively provided with an iron core corresponding to the conductive part and the connecting part.
5. The static contact arc extinguishing module of the circuit breaker of claim 4, wherein: the two arc isolating plates are respectively provided with a clamping groove matched with the shape of the iron core, the iron core is clamped in the clamping groove, and the iron core and the arc isolating plates are clamped and matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488549.1A CN112614765A (en) | 2020-12-16 | 2020-12-16 | Static contact arc extinguishing module of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011488549.1A CN112614765A (en) | 2020-12-16 | 2020-12-16 | Static contact arc extinguishing module of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112614765A true CN112614765A (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011488549.1A Pending CN112614765A (en) | 2020-12-16 | 2020-12-16 | Static contact arc extinguishing module of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112614765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098898A (en) * | 2024-04-24 | 2024-05-28 | 温州晋开电气有限公司 | Plastic case circuit breaker with good arc extinguishing effect |
-
2020
- 2020-12-16 CN CN202011488549.1A patent/CN112614765A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118098898A (en) * | 2024-04-24 | 2024-05-28 | 温州晋开电气有限公司 | Plastic case circuit breaker with good arc extinguishing effect |
| CN118098898B (en) * | 2024-04-24 | 2024-06-21 | 温州晋开电气有限公司 | Plastic case circuit breaker with good arc extinguishing effect |
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