CN201918340U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
- Publication number
- CN201918340U CN201918340U CN2011200109203U CN201120010920U CN201918340U CN 201918340 U CN201918340 U CN 201918340U CN 2011200109203 U CN2011200109203 U CN 2011200109203U CN 201120010920 U CN201120010920 U CN 201120010920U CN 201918340 U CN201918340 U CN 201918340U
- Authority
- CN
- China
- Prior art keywords
- arc
- contact
- control device
- circuit breaker
- arc extinguishing
- 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 - Fee Related
Links
- 230000000171 quenching Effects 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 12
- 238000005452 bending Methods 0.000 claims description 10
- 239000010960 cold rolled steel Substances 0.000 claims description 5
- 230000003068 static Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
Abstract
The utility model discloses a small-sized circuit breaker, which comprises a shell, an operating system, a contact system, an electromagnetic release system and an arc extinguishing system. The contact system comprises a movable contact and a static contact, the electromagnetic release system comprises a magnet yoke, the arc extinguishing system comprises an arc striking plate and an arc extinguishing chamber arranged below the magnet yoke, the arc striking plate is arranged below the arc extinguishing chamber, one end of the arc striking plate is connected with the static contact while the other end of the arc striking plate extends into the arc extinguishing chamber, the arc extinguishing system further comprises an arc guiding plate disposed between the arc extinguishing chamber and the magnet yoke, and one end, which is close to the movable contact, of the arc guiding plate extends and is bent upwards so as to contact with the movable contact. The small-sized circuit breaker is added with the arc guiding plate, the arc guiding plate and the arc striking plate form two arc striking devices, and a portion of arcs on the movable contact is led into the arc extinguishing chamber via the arc guiding plate, thereby increasing arc extinguishing ability. In addition, arc striking paths of products are indirectly elongated, arcs are elongated and thinned, arc resistance is increased, and accordingly arc extinguishing ability of the products is increased.
Description
Technical field
The utility model relates to a kind of controller switching equipment, is specifically related to a kind of miniature circuit breaker that is used for overcurrent protection and short-circuit protection.
Background technology
Circuit breaker is used to switch on or off load current when normal operation; In be short-circuited fault or when seriously loading of electric equipment or circuit, control its disengagement failure electric current promptly automatically by protective relaying device, the equipment or the circuit that cut off the fault that is short-circuited are to prevent expansion accident scope.In each unit of miniature circuit breaker, comprise contact system, arc quenching system, operating mechanism.The effect of arc quenching system be when miniature circuit breaker when disconnecting excessive short circuit current, by effect, realize that the restriction electric current continues the trend that increases, i.e. metering function, arc extinction the most at last to electric arc.When electric arc enters arc control device, be separated into many sections by the metal gate sheet in the arc control device, every section electric arc all produces a proximal pole voltage near the metal gate sheet, the pressure drop of whole electric arc is improved rapidly, and electric arc is extinguished rapidly.
Traditional miniature circuit breaker arc quenching system comprise arc control device, striking sheet etc., the disjunction index of this design of mini circuit breaker generally can only reach 6kA, therefore breaking capacity is not high, needs the high miniature circuit breaker of research breaking capacity.And general miniature circuit breaker has only a pass arc device, striking path weak point, arc extinguishing ability.
Summary of the invention
The purpose of this utility model: in order to overcome the defective of prior art, the utility model provides the miniature circuit breaker that a kind of arc extinguishing ability is strong, breaking capacity is high.
The technical solution of the utility model: a kind of miniature circuit breaker, comprise housing, operating system, contact system, electromagnetic trip system and arc quenching system, described contact system comprises moving contact and fixed contact, described electromagnetic trip system comprises yoke, described arc quenching system comprises the striking sheet and is arranged on the arc control device of yoke below, the striking sheet is arranged on the below of arc control device, one end of striking sheet is connected with fixed contact, the other end stretches into arc control device, described arc quenching system also comprises leads the arc plate, the described arc plate of leading is arranged between arc control device and the yoke, leads end extension and the upwards bending of arc plate near moving contact, and upwards the part of bending is touched with the moving contact subsides.
Preferably, the described arc plate of leading is arranged between arc control device and the yoke, stretches into arc control device near arc control device one end, near the upwards bending of an end of moving contact, during initial condition, lead the arc plate upwards the part of bending fit with the top of moving contact and contact.Adopt above-mentioned preferably be provided with after, moving contact is with to lead arc plate fiting effect better, thereby improved the striking effect.
Preferably, described arc control device are provided with cold-rolled steel grid sheet.Adopt above-mentioned preferably be provided with after, the electric arc that cold-rolled steel grid sheet will be introduced into arc control device is divided into several sections short arcs, and arc resistance is increased, and has improved the arc extinguishing ability of product.
Miniature circuit breaker of the present utility model has increased leads the arc plate, forms the two-way arc-initiating device with the striking sheet, and the electric arc part on the moving contact is introduced arc control device by leading the arc plate, and the electric arc on the fixed contact is introduced arc control device by the striking sheet; On the other hand, drawing-down is elongated with electric arc in the miniature circuit breaker of the present utility model striking path of having extended indirectly, and arc resistance is increased, thereby has improved the arc extinguishing ability of product, during less than 40A, is easy to the electric current of disjunction 6kA, the breaking capacity height in rated current.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Embodiment
As shown in Figure 1, a kind of miniature circuit breaker comprises housing 1, operating system 5, contact system 4, electromagnetic trip system 2 and arc quenching system 3, contact system 4 comprises moving contact 41 and fixed contact 42, operating system 5 comprises handle 51, and handle 51 is arranged on the housing 1, handled easily.Electromagnetic trip system 2 comprises yoke 21, arc quenching system 3 comprises striking sheet 33 and is arranged on the arc control device 31 of yoke 21 belows, striking sheet 33 is arranged on the below of arc control device 31, arc control device 31 are provided with cold-rolled steel grid sheet, one end of striking sheet 33 is connected with fixed contact 42, the other end stretches into arc control device 31, arc quenching system 3 also comprises leads arc plate 32, leading arc plate 32 is arranged between arc control device 31 and the yoke 21, end near arc control device 31 stretches into arc control device 31, end near moving contact 41 extends and upwards bending, and upwards the part 321 of bending is fitted with the top of moving contact 41 and contacted.
When miniature circuit breaker of the present utility model is in initial condition, moving contact 41 with lead arc plate 32 and paste mutually and touch.In the process that moving contact 41 and fixed contact disconnected in 42 minutes, produce electric arc between dynamic and static contact, the electric arc on the fixed contact 42 is introduced arc control device 31 by striking sheet 33, and the electric arc part on the moving contact 41 is introduced arc control device 31 by leading arc plate 32.After electric arc is introduced into arc control device 31, be divided into several sections by cold-rolled steel grid sheet after arc extinguishing.
Claims (3)
1. miniature circuit breaker, comprise housing (1), operating system (5), contact system (4), electromagnetic trip system (2) and arc quenching system (3), described contact system (4) comprises moving contact (41) and fixed contact (42), described electromagnetic trip system (2) comprises yoke (21), described arc quenching system (3) comprises striking sheet (33) and is arranged on the arc control device (31) of yoke (21) below, striking (33) sheet is arranged on the below of arc control device (31), striking sheet (33) one ends are connected with fixed contact (42), the other end stretches into arc control device (31), it is characterized in that: described arc quenching system (3) also comprises leads arc plate (32), the described arc plate (32) of leading is arranged between arc control device (31) and the yoke (21), lead end extension and the upwards bending of arc plate (32) near moving contact (42), upwards the part (321) of bending and moving contact (42) paste and touch.
2. miniature circuit breaker according to claim 1, it is characterized in that: the described arc plate (32) of leading is arranged between arc control device (31) and the yoke (21), end near arc control device (31) stretches into arc control device (31), upwards bending of an end near moving contact (42), during initial condition, lead arc plate (32) upwards the part (321) of bending contact with the top applying of moving contact (42).
3. miniature circuit breaker according to claim 1 and 2 is characterized in that: described arc control device (31) are provided with cold-rolled steel grid sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200109203U CN201918340U (en) | 2011-01-14 | 2011-01-14 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200109203U CN201918340U (en) | 2011-01-14 | 2011-01-14 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201918340U true CN201918340U (en) | 2011-08-03 |
Family
ID=44418131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200109203U Expired - Fee Related CN201918340U (en) | 2011-01-14 | 2011-01-14 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201918340U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610455A (en) * | 2012-04-01 | 2012-07-25 | 天津市鸿远电气设备有限公司 | Arc extinguishing mechanism of low-voltage circuit breaker |
-
2011
- 2011-01-14 CN CN2011200109203U patent/CN201918340U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102610455A (en) * | 2012-04-01 | 2012-07-25 | 天津市鸿远电气设备有限公司 | Arc extinguishing mechanism of low-voltage circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110803 Termination date: 20140114 |