CN111092007A - Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system - Google Patents
Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system Download PDFInfo
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- CN111092007A CN111092007A CN201911255658.6A CN201911255658A CN111092007A CN 111092007 A CN111092007 A CN 111092007A CN 201911255658 A CN201911255658 A CN 201911255658A CN 111092007 A CN111092007 A CN 111092007A
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- arc
- contact
- striking
- extinguishing
- circuit breaker
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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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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a frame-type circuit breaker arc striking and extinguishing device and a contact arc extinguishing system, wherein the frame-type circuit breaker contact arc extinguishing system comprises the frame-type circuit breaker arc striking and extinguishing device, the lower end of an arc striking sheet in the frame-type circuit breaker arc striking and extinguishing device is provided with a contact system corresponding to the arc striking sheet, the contact system is arranged in an arc isolating cover, a contact support is arranged below the contact system, the left side and the right side of the contact support are respectively provided with a fixed splint, the left end and the right end of the arc isolating cover are respectively connected with the two fixed splints, the lower ends of the arc isolating cover and the contact support are arranged on a support, and a. The arc striking and extinguishing device guides the arc into the contact arc extinguishing system, so that the breaking current and arc extinguishing performance of the contact system of the circuit breaker can be effectively improved, the burning loss of the main contact of the contact system is effectively reduced, the actual service life of the contact system is prolonged, and the actual service life cycle of the contact system and the circuit breaker is prolonged.
Description
Technical Field
The invention relates to a frame type circuit breaker arc striking and extinguishing device and a contact arc extinguishing system, belonging to the technical field of low-voltage electrical appliances.
Background
The frame-type circuit breaker is an important component in a low-voltage distribution system, is usually used as an inlet main switch or a branch main switch in a distribution network for distributing electric energy, protecting circuits and power supply equipment and preventing the damage of faults such as overload, undervoltage, short circuit, single-phase grounding and the like.
The frame-type circuit breaker is used for switching on, breaking off and bearing rated working current and fault current such as short circuit, overload and the like, and when overload, short circuit and voltage reduction or disappearance occur in a circuit, the circuit can be automatically cut off, and reliable protection is carried out. The contact arc extinguishing system of the circuit breaker plays a role in breaking the main loop current and the short circuit current of the load-bearing circuit.
The contact arc-extinguishing system of the circuit breaker, particularly the main contact, breaks and arcs, and directly influences the service life of the contact arc-extinguishing system. Therefore, the breaking performance of the contact system and the arc striking effect of the arc extinguishing device are effectively improved, the breaking index and the service life of the contact system can be effectively improved, and the practical service life of the circuit breaker is prolonged.
The existing frame-type circuit breaker contact arc extinguishing system mainly comprises an arc striking plate, an arc extinguishing plate, an arc isolating plate, an arc extinguishing wall, a contact support, a contact spring, a rotating shaft, a fastener, a bracket, a bus, a fixed splint, a contact finger, a contact, a connecting rod and the like, when the circuit breaker works in a distribution circuit, the moving and static contacts of the circuit breaker are required to be connected and disconnected with larger normal or abnormal short circuit and overload current, so that the circuit breaker contact arc extinguishing system not only needs to be connected and disconnected with the normal or abnormal short circuit and overload current, but also needs to improve the disconnection performance of the contact, so that the contact finger contact has less silver point burning loss and long service life; after the contact system of the circuit breaker is broken, the fault arc can rapidly enter the arc striking and extinguishing device and is cut off and cooled by the arc extinguishing deletion sheet, so that the purpose of rapid arc extinguishing and cooling is achieved, the burning loss degree of the contact is reduced to the minimum, and the service life is longest. In the prior art, a general contact system does not have an independent arc contact or/and an arc striking and extinguishing device which is correspondingly arranged according to the arc contact, the contact system and the arc extinguishing system cannot be well matched, the breaking and extinguishing performance is not high, and the electric service life and the breaking service life of the circuit breaker are not high.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to improve the degree of cooperation of contact system and arc extinguishing system, improve disconnected arc extinguishing performance to improve circuit breaker electric life, disconnected life-span.
In order to solve the technical problem, the technical scheme of the invention provides an arc striking and extinguishing device of a frame type circuit breaker, which is characterized by comprising a right arc extinguishing wall and a left arc extinguishing wall, wherein the right arc extinguishing wall and the left arc extinguishing wall are fixedly connected together to form a housing, one side of the right arc extinguishing wall and one side of the left arc extinguishing wall are respectively connected with the left end and the right end of an arc striking sheet, a plurality of arc extinguishing sheets are uniformly distributed in the housing, and an arc isolating sheet is arranged between the top of the housing and the arc extinguishing sheets.
Preferably, the plurality of arc extinguishing pieces and the arc ignition pieces are arranged in parallel.
Preferably, the lower end of the arc striking piece is provided with a main arc striking tongue and an auxiliary arc striking tongue which correspond to the contact fingers; the main arc striking tongues and the auxiliary arc striking tongues are arranged in a high-low mode.
Preferably, the arc starting sheet comprises an arc starting plate positioned at the upper part, and the left side and the right side of the arc starting plate are both provided with arc starting sheet edges.
The utility model provides a frame-type circuit breaker arc extinguishing system, its characterized in that, includes frame-type circuit breaker striking arc extinguishing device, frame-type circuit breaker striking arc extinguishing device in the lower extreme of striking piece be equipped with rather than the contact system who corresponds, in the arc-isolating cover was located to the contact system, the below of contact system is equipped with the contact and supports, the left and right sides that the contact supported all is equipped with solid fixed splint, both ends are connected respectively with two solid fixed splint about the arc-isolating cover, on the support was located to the lower extreme that arc-isolating cover and contact supported, be equipped with the generating line on the support.
Preferably, the contact system comprises two contact fingers, namely a contact finger with an arc contact and a contact finger without the arc contact, the contact finger with the arc contact is provided with a first main contact and an arc contact, the contact finger without the arc contact is provided with a second main contact only, the contact finger with the arc contact is arranged in the middle of the contact system, and the contact fingers without the arc contact are symmetrically arranged on two sides of the contact finger with the arc contact.
Preferably, the arc contact is welded with a contact point.
Preferably, the main arc striking tongue and the auxiliary arc striking tongue on the arc striking plate are respectively coupled with the topmost ends of the contact fingers with the arc contacts and the topmost ends of the contact fingers without the arc contacts.
The arc striking and extinguishing device guides the arc into the contact arc extinguishing system, so that the breaking current and arc extinguishing performance of the contact system of the circuit breaker can be effectively improved, the burning loss of the main contact of the contact system is effectively reduced, the actual service life of the contact system is prolonged, and the actual service life cycle of the contact system and the circuit breaker is prolonged.
Compared with the prior art, the invention has the following advantages:
1. the structure is simple, the universality of parts is strong, and the installation is convenient;
2. the size of the installation space is unchanged, and the breaking performance is high;
3. good arc striking effect and long service life.
Drawings
Fig. 1 is a schematic view of an arc striking and extinguishing device of a frame type circuit breaker;
fig. 2 is an internal structure view of an arc striking and extinguishing device of a frame type circuit breaker;
FIG. 3 is a schematic view of a striking plate;
fig. 4 is a side view of a frame breaker contact arc quenching system;
fig. 5 is a partial cross-sectional view of a frame breaker contact arc quenching system.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The invention discloses an arc striking and extinguishing device of a frame type circuit breaker, which comprises a right arc extinguishing wall 5 and a left arc extinguishing wall 6, wherein the right arc extinguishing wall 5 and the left arc extinguishing wall 6 are fixedly connected together through a riveting screw 4 to form a housing, one side of the right arc extinguishing wall 5 and one side of the left arc extinguishing wall 6 are respectively connected with the left end and the right end of an arc striking sheet 1, a plurality of arc striking sheets 2 are uniformly distributed in the housing, and an arc isolating sheet 3 is arranged between the top of the housing and the arc striking sheets 2. The arc extinguishing pieces 2 and the arc striking pieces 1 are arranged in parallel.
The arc striking and extinguishing device comprises an arc striking sheet 1, an arc extinguishing sheet 2, an arc isolating sheet 3, a riveting screw 4, a right arc extinguishing wall 5, a left arc extinguishing wall 6 and the like, wherein a main arc striking tongue 103 and an auxiliary arc striking tongue 104 of the arc striking sheet 1 are arranged in a coupling mode with the topmost ends of two contact fingers (namely a contact finger 7 with an arc contact and a contact finger 8 without the arc contact).
The lower end of the arc striking piece 1 is provided with a main arc striking tongue 103 and an auxiliary arc striking tongue 104 which correspond to the contact fingers; the main arc striking tongue 103 and the auxiliary arc striking tongue 104 are arranged in a high-low mode. The arc starting sheet 1 comprises an arc starting plate 101 positioned at the upper part, and arc starting sheet edges 102 are arranged at the left side and the right side of the arc starting plate 101.
As shown in fig. 4 and 5, the frame-type circuit breaker contact arc extinguishing system of the invention comprises an arc striking plate 1, an arc extinguishing plate 2, an arc isolating plate 3, a riveting screw 4, a right arc extinguishing wall 5, a left arc extinguishing wall 6, a contact finger 7 with an arc contact, a contact finger 8 without an arc contact, an arc isolating cover 9, a contact support 10, a bus 11, a bracket 12, a fixed splint 13, a fastener 14 and the like. The lower end of the arc striking piece 1 is provided with a contact system corresponding to the arc striking piece, the contact system is arranged in an arc isolating cover 9, a contact support 10 is arranged below the contact system, fixing clamping plates 13 are arranged on the left side and the right side of the contact support 10, the left end and the right end of the arc isolating cover 9 are respectively connected with the two fixing clamping plates 13, the lower ends of the arc isolating cover 9 and the contact support 10 are arranged on a support 12, and a bus 11 is arranged on the support 12. Two fixed clamping plates 13 clamp the contact system by means of fasteners 14.
The frame type circuit breaker contact arc extinguishing system is provided with a high breaking contact, the contact system is provided with two contact fingers, namely a contact finger 7 with an arc contact and a contact finger 8 without the arc contact, the contact finger 7 with the arc contact is provided with a first main contact 701 and an arc contact 702, and the arc contact 702 is also welded with a contact so as to improve the contact breaking performance of the arc contact 702; the contact fingers 8 without arcing contacts have only the second main contact 801, the contact fingers 7 with arcing contacts are mounted in the middle of the contact system, and the contact fingers 8 without arcing contacts are mounted symmetrically on both sides of the contact fingers 7 with arcing contacts.
When the frame type circuit breaker contact arc extinguishing system breaks normal working current or abnormal short circuit current, a moving contact 16 (shown in figure 4) of the contact arc extinguishing system of the circuit breaker is separated from a fixed contact 15, electric arcs are generated between moving contact points and static contact points, the electric arcs on the moving contact 16 are generated on a first main contact 701 and an arc contact 702 of a contact finger 7 with an arc contact, and as the separation distance between the moving contact and the static contact is increased, main electric arcs on the moving contact 16 are transferred to the top of the arc contact 702 and the top of the contact finger 7 with the arc contact, because bending tongues (namely a main arc tongue 103 and an auxiliary arc tongue 104) of an arc striking plate 1 are coupled with the top end of the contact finger, the electric arcs rapidly enter the inner part of an arc striking arc extinguishing device A of the circuit breaker along the bending tongues of the arc striking plate 1 and are cut off and cooled by a deleting plate, the purpose of rapid arc striking is achieved, and the burning loss of the electric arcs to the, the service life of the circuit breaker is prolonged. The movable contact 16 comprises a contact finger 7 with an arc contact, a contact finger 8 without the arc contact, an arc isolating cover 9, a contact support 10, a bus 11, a bracket 12, a fixed clamping plate 13 and a fastener 14. The stationary contact 15 is arranged in front of the movable contact 16.
Claims (8)
1. The utility model provides a frame-type circuit breaker striking arc extinguishing device, a serial communication port, including right arc-extinguishing wall (5) and left arc-extinguishing wall (6), right arc-extinguishing wall (5) and left arc-extinguishing wall (6) fixed connection form the housing together, both ends about arc-striking piece (1) are connected respectively to one side of right arc-extinguishing wall (5) and one side of left arc-extinguishing wall (6), the equipartition has a plurality of arc-extinguishing pieces (2) in the housing, be equipped with between the top of housing and arc-extinguishing piece (2) and separate arc piece (3).
2. A frame type circuit breaker arc striking and extinguishing device according to claim 1, characterized in that said plurality of arc striking plates (2) are juxtaposed to the arc striking plate (1).
3. A frame type circuit breaker arc striking and extinguishing device as claimed in claim 1, characterized in that the lower end of the striking plate (1) is provided with a main striking tongue (103) and an auxiliary striking tongue (104) corresponding to the contact fingers; the main arc striking tongue (103) and the auxiliary arc striking tongue (104) are arranged in a high-low mode.
4. A frame type circuit breaker arc striking and extinguishing device according to claim 1, characterized in that the striking plate (1) comprises an upper striking plate (101), and striking plate edges (102) are provided on both left and right sides of the striking plate (101).
5. A frame type circuit breaker arc-striking and extinguishing system is characterized in that the frame type circuit breaker arc-striking and extinguishing device comprises the frame type circuit breaker arc-striking and extinguishing device according to any one of claims 1 to 4, a contact system corresponding to the lower end of an arc striking plate (1) in the frame type circuit breaker arc-striking and extinguishing device is arranged in an arc-isolating cover (9), a contact support (10) is arranged below the contact system, fixed clamping plates (13) are respectively arranged on the left side and the right side of the contact support (10), the left end and the right end of the arc-isolating cover (9) are respectively connected with the two fixed clamping plates (13), the lower ends of the arc-isolating cover (9) and the contact support (10) are arranged on a support (12), and a bus (11) is arranged on the support (12).
6. A frame type circuit breaker contact arc extinguishing system according to claim 5, characterized in that the contact system comprises two contact fingers, respectively a finger (7) with arcing contact and a finger (8) without arcing contact, the finger (7) with arcing contact is provided with a first main contact (701) and an arcing contact (702), the finger (8) without arcing contact is provided with only a second main contact (801), the finger (7) with arcing contact is provided in the middle of the contact system, and the fingers (8) without arcing contact are symmetrically arranged on both sides of the finger (7) with arcing contact.
7. A frame type circuit breaker contact arc extinguishing system according to claim 6, characterized in that the arc contacts (702) are welded with contacts.
8. A frame type circuit breaker contact arc extinguishing system according to claim 5, characterized in that the main striking tongue (103) and the auxiliary striking tongue (104) of the striking plate (1) are respectively coupled with the topmost ends of the contact fingers (7) with arcing contacts and the contact fingers (8) without arcing contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255658.6A CN111092007B (en) | 2019-12-10 | 2019-12-10 | Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911255658.6A CN111092007B (en) | 2019-12-10 | 2019-12-10 | Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111092007A true CN111092007A (en) | 2020-05-01 |
| CN111092007B CN111092007B (en) | 2022-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911255658.6A Active CN111092007B (en) | 2019-12-10 | 2019-12-10 | Frame-type circuit breaker striking arc extinguishing device and contact arc extinguishing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111092007B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113284773A (en) * | 2021-05-26 | 2021-08-20 | 上海电器科学研究所（集团）有限公司 | Switch with built-in current-limiting fuse |
| CN114496643A (en) * | 2020-10-25 | 2022-05-13 | Abb瑞士股份有限公司 | Interrupter for direct current interruption |
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
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| EP1939904A2 (en) * | 2006-12-29 | 2008-07-02 | LS Industrial Systems Co., Ltd | Air circuit breaker with ARC extinguishing apparatus |
| CN202384280U (en) * | 2012-01-05 | 2012-08-15 | 德力西电气有限公司 | Grid type arc extinguish chamber for frame circuit breaker |
| CN205542666U (en) * | 2016-02-05 | 2016-08-31 | 上海良信电器股份有限公司 | Circuit breaker explosion chamber improvement structure |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN108766847A (en) * | 2018-04-20 | 2018-11-06 | 上海良信电器股份有限公司 | A kind of contact arc extinguishing device of breaker |
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2019
- 2019-12-10 CN CN201911255658.6A patent/CN111092007B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1939904A2 (en) * | 2006-12-29 | 2008-07-02 | LS Industrial Systems Co., Ltd | Air circuit breaker with ARC extinguishing apparatus |
| CN202384280U (en) * | 2012-01-05 | 2012-08-15 | 德力西电气有限公司 | Grid type arc extinguish chamber for frame circuit breaker |
| CN205542666U (en) * | 2016-02-05 | 2016-08-31 | 上海良信电器股份有限公司 | Circuit breaker explosion chamber improvement structure |
| CN107680891A (en) * | 2017-10-31 | 2018-02-09 | 首瑞（天津）电气设备有限公司 | A kind of contact arc-extinguishing system, low-voltage circuit breaker and arc quenching system |
| CN108766847A (en) * | 2018-04-20 | 2018-11-06 | 上海良信电器股份有限公司 | A kind of contact arc extinguishing device of breaker |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114496643A (en) * | 2020-10-25 | 2022-05-13 | Abb瑞士股份有限公司 | Interrupter for direct current interruption |
| CN113284773A (en) * | 2021-05-26 | 2021-08-20 | 上海电器科学研究所（集团）有限公司 | Switch with built-in current-limiting fuse |
| CN117457453A (en) * | 2023-12-25 | 2024-01-26 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
| CN117457453B (en) * | 2023-12-25 | 2024-04-30 | 浙江正泰电器股份有限公司 | Arc extinguishing structure of circuit breaker and circuit breaker |
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| Publication number | Publication date |
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| CN111092007B (en) | 2022-07-01 |
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