CN2409606Y - Small circuit breaker arc striking apparatus - Google Patents
Small circuit breaker arc striking apparatus Download PDFInfo
- Publication number
- CN2409606Y CN2409606Y CN 00219504 CN00219504U CN2409606Y CN 2409606 Y CN2409606 Y CN 2409606Y CN 00219504 CN00219504 CN 00219504 CN 00219504 U CN00219504 U CN 00219504U CN 2409606 Y CN2409606 Y CN 2409606Y
- Authority
- CN
- China
- Prior art keywords
- moving contact
- striking sheet
- arc
- circuit breaker
- arc striking
- Prior art date
- 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.)
- Expired - Lifetime
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
The utility model relates to a small circuit breaker arc striking apparatus, which is composed of an arc striking sheet connected with a static contact, the static contact, a movable contact, a flexible joint, a support frame, a coil, an arc striking sheet and an arc-extinguishing chamber, wherein, one end of the arc striking sheet is fixed at the jointing position of the coil and the support frame; the head part of the other end extends to above the head part of the movable contact support frame and between the movable contact and the arc striking sheet near the movable contact. The utility model can make the electric arc on the movable contact quickly transfer to on the arc striking sheet; thereby, the breaking capacity of the circuit breaker can be increased.
Description
The utility model relates to a kind of arc-initiating device of miniature circuit breaker, is the improvement to existing miniature circuit breaker arc-initiating device.
The arc-initiating device (as shown in Figure 2) of existing miniature circuit breaker, it is by the striking sheet that is connected with web, be welded on the fixed contact of striking sheet and web junction, be welded on the moving contact at moving contact rack head place, one end is connected with moving contact, the flexible connection that the other end is connected with bimetal leaf and be positioned at moving contact below and be fixed on striking sheet on the interface of coil and support and composition such as arc control device, in this device because the striking sheet at moving contact place is ∩ shape and upper end portion is positioned at the moving contact rack lower head, so the electric arc that produces between moving contact and fixed contact is in the arc control device motion process, the electric arc at moving contact place at first will shift to the moving contact rack head, transfer on the ∩ shape striking sheet after moving arrival bottom along moving contact rack head place, introduce arc control device by ∩ shape striking sheet again, in above-mentioned arc process, electric current is at first from web → fixed contact → moving contact → flexible connection → bimetal leaf → support → coil, and the striking sheet and the coil at moving contact place, the interface of support is equipotential, so the potential difference between the ∩ shape striking sheet at the striking sheet at fixed contact place and moving contact place is bigger than the potential difference between the striking sheet at moving contact and fixed contact place, thereby cause electric arc comparatively difficult when being transferred to ∩ shape striking sheet downwards from moving contact, thereby reduced the breaking capacity of miniature circuit breaker.
Thereby the purpose of this utility model is will provide a kind of can make the arc energy on the moving contact be transferred to the arc-initiating device that improves the miniature circuit breaker of circuit breaker breaking capacity on the striking sheet fast.
The purpose of this utility model is achieved like this, a kind of arc-initiating device of miniature circuit breaker, it is the striking sheet 7 that is connected by with connecting plate 12, be welded on the fixed contact 4 of striking sheet 7 and web 12 junctions, be welded on the moving contact 1 at moving contact rack head 2 places, one end is connected with moving contact 1, the flexible connection 8 that the other end is connected with bimetal leaf 9, the support 10 that is connected with bimetal leaf 9, one end is fixed on the support 10, coil 11 that the other end is connected with web 13 and striking sheet 3 and arc control device 5 are formed, and an end of described striking sheet 3 is fixed on the top that coil 11 and the head of the connection place other end of support 10 extend to moving contact rack head 2, between moving contact 1 and the striking sheet 7 and near moving contact 1 place.
Below in conjunction with accompanying drawing the utility model is further described below.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the structural representation of original miniature circuit breaker arc-initiating device.
Striking sheet 3 of the present utility model adopts metal material to bend to L shaped double-decker, and L shaped double-deck overlapping is isolated with insulating material.One end of striking sheet 3 is welded on by the pad of coil 11 and support 10, and the head of another curved end rises to the top of moving contact rack head 2, and between moving contact 1 and striking sheet 7 and near moving contact 1 place.Because after striking sheet 3 adopts said structure, when producing electric arc between fixed contact 4 and the moving contact 1, the electric arc at moving contact 1 place directly and the last end in contact of striking sheet 3, cause the potential difference between striking sheet 3 and the striking sheet 7 littler, thereby the electric arc that helps moving contact 1 place is forced to be transferred on the striking sheet 3 than the potential difference between moving contact 1 and the striking sheet 7.
One end of striking sheet 7 of the present utility model is connected with web 12, is welded with fixed contact 4 at the tie point place of striking sheet 7 and web 12, and the other end of striking sheet 7 extends in the arc ignition room 5, is convenient to the electric arc at fixed contact 4 places is introduced in the arc ignition room 5.Moving contact rack 6 of the present utility model is installed in the tripping 15 in the circuit breaker pedestal 14, and can rotate around tripping 15, support head 2 places solid welding at moving contact rack 6 has moving contact 1, be connected with an end of flexible connection 8 on the below of moving contact 1, the moving contact rack head 2, the other end of flexible connection 8 is connected with bimetal leaf 9, bimetal leaf 9 is fixed on the support 10, support 10 is installed in the pedestal 14 of circuit breaker, one end of coil 11 is welded on the support 10, and the other end of coil 11 is connected with another web 13 on the pedestal of circuit breaker.
During the circuit breaker that the utility model is in closure state when a very large relatively overload current flows through (being that moving contact 1 contacts with fixed contact 4), the current path of circuit breaker is: web 12 → fixed contact 4 → moving contact 1 → flexible connection 8 → bimetal leaf 9 → support 10 → coil 11 → web 13, at this moment moving contact 1 is subjected to electrodynamic effect and leaves fixed contact 4, and between moving contact 1 and fixed contact 4, produce electric arc, electric arc is subjected to electrodynamic effect at first at the electric arc at fixed contact place along striking sheet 7 to the right, downward direction motion, electric arc is by last, following direction becomes left and right directions; Meanwhile the distance between moving contact 1 and the fixed contact 4 increases, at this moment the electric arc at moving contact 1 place contacts with the upper end of striking sheet 3, because the potential difference between striking sheet 3 and the striking sheet 7 is littler than the potential difference between moving contact 1 and the striking sheet 7, thereby current path changes rapidly, from fixed contact 4 → striking sheet 3 → coil 11, electric arc also is forced to transfer on the striking sheet 3 from moving contact 1, and then the electric arc two ends are introduced in the arc control device 5 along striking sheet 7,3 respectively and extinguish.
The utility model is owing to after adopting said structure, be transferred on the striking sheet 3 arc energy at moving contact 1 place fast, and then is introduced in the arc control device 5 and extinguishes, thereby effectively improved the breaking capacity of circuit breaker.
Claims (2)
1, a kind of arc-initiating device of miniature circuit breaker, it is the striking sheet (7) that is connected by with connecting plate (12), be welded on the fixed contact (4) of striking sheet (7) and web (12) junction, be welded on the moving contact (1) that moving contact rack head (2) is located, one end is connected with moving contact (1), the flexible connection (8) that the other end is connected with bimetal leaf (9), the support (10) that is connected with bimetal leaf (9), one end is fixed on the support (10), coil (11) that the other end is connected with web (13) and striking sheet (3) and arc control device (5) are formed, it is characterized in that an end of described striking sheet (3) is fixed on the connection place of coil (11) and support (10), the head of the other end extends to the top of moving contact rack head (2), locate between moving contact (1) and the striking sheet (7) and near moving contact (1).
2, the arc-initiating device of miniature circuit breaker according to claim 1 is characterized in that striking sheet (3) adopts metal material to bend to L shaped double-decker, and L shaped double-deck overlapping is isolated with insulating material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219504 CN2409606Y (en) | 2000-02-28 | 2000-02-28 | Small circuit breaker arc striking apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00219504 CN2409606Y (en) | 2000-02-28 | 2000-02-28 | Small circuit breaker arc striking apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2409606Y true CN2409606Y (en) | 2000-12-06 |
Family
ID=33584687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00219504 Expired - Lifetime CN2409606Y (en) | 2000-02-28 | 2000-02-28 | Small circuit breaker arc striking apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2409606Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794894B (en) * | 2004-12-25 | 2011-03-30 | 鸿富锦精密工业（深圳）有限公司 | Driving device of cold-cathode fluorescent lamp |
| CN102024634A (en) * | 2010-12-03 | 2011-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Miniature circuit breaker |
| CN107610987A (en) * | 2017-09-22 | 2018-01-19 | 嘉兴市加控电气设备制造有限公司 | A kind of miniature circuit breaker |
-
2000
- 2000-02-28 CN CN 00219504 patent/CN2409606Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1794894B (en) * | 2004-12-25 | 2011-03-30 | 鸿富锦精密工业（深圳）有限公司 | Driving device of cold-cathode fluorescent lamp |
| CN102024634A (en) * | 2010-12-03 | 2011-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Miniature circuit breaker |
| CN107610987A (en) * | 2017-09-22 | 2018-01-19 | 嘉兴市加控电气设备制造有限公司 | A kind of miniature circuit breaker |
| CN107610987B (en) * | 2017-09-22 | 2020-04-24 | 嘉兴市加控电气设备制造有限公司 | Small-sized circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHANGSHU SWITCH MANUFACTURING CO., LTD. ( CHANGSHU Free format text: FORMER NAME OR ADDRESS: CHANGSHU SWITCH FACTORY |
|
| CP03 | Change of name, title or address |
Address after: 215500 No. 8 Jianye Road, Jiangsu, Changshou City Patentee after: Changshu Switchgear Manufacturing Co., Ltd. (Former Changshu Switchgear Factory) Address before: 215532 Li Road, Jiangsu, Changshou City Patentee before: Changshu Switch Factory |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20001206 |