CN202523660U - Low-voltage breaker - Google Patents
Low-voltage breaker Download PDFInfo
- Publication number
- CN202523660U CN202523660U CN2012201521055U CN201220152105U CN202523660U CN 202523660 U CN202523660 U CN 202523660U CN 2012201521055 U CN2012201521055 U CN 2012201521055U CN 201220152105 U CN201220152105 U CN 201220152105U CN 202523660 U CN202523660 U CN 202523660U
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- Prior art keywords
- arc
- contact
- moving contact
- led
- low
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- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a low-voltage breaker. An arc-quenching mechanism inside the low-voltage breaker can accurately and quickly introduce arc into an arc-quenching chamber and quench the arc so as to avoid a failure and ensure electrical safety. The low-voltage breaker comprises a shell, and a contact system, a tripping system and the arc-quenching mechanism which are arranged inside the shell, wherein the arc-quenching mechanism comprises a static contact, a moveable contact, and a magnetic yoke which is positioned on the left sides of the static contact and the moveable contact; the arc-quenching chamber is arranged at the lower part of the magnetic yoke; the static contact is connected with a static contact arc-guiding plate through a contact plate; the static contact arc-guiding plate extends to the lower side of the arc-quenching chamber, the low-voltage breaker is characterized in that the arc-quenching mechanism further comprises a moveable contact arc-guiding plate between the magnetic yoke and the arc-quenching chamber; the moveable contact arc-guiding plate is fixed at the lower end of the magnetic yoke and extends to a position near the moveable contact; and the end part of the moveable contact arc-guiding plate is positioned on a moving track when the moveable contact is disconnected from the static contact.
Description
Technical field
The utility model relates to technical field of motors, especially a kind of can be fast, the effective low-voltage circuit breaker of arc extinguishing.
Background technology
When cutting off power consumption equipment, can produce arclight between fixed contact and the moving contact with electric switch, be called arcing.Power consumption equipment is big more, and the arc light that is produced is also big more.Electric arc harm shows that mainly electric arc can produce serious or even fatal burning to human body to the harm on the person and the equipment, and the electric arc in the device for switching can cause short circuit, and moment produces huge energy maybe burning apparatus.Therefore, on the general switch arc-control device is housed all, is divided into very little electric arc to the electric arc that is produced, be convenient to very fast extinguishing.If there is not arc-control device, the arclight that is produced bumps together, can produce short trouble, and then makes the switch overcurrent of upper level and trip.
Circuit breaker is divided into two kinds of low-voltage circuit breaker and primary cut-outs by the scope of application.Low-voltage circuit breaker is claimed automatic switch again, is commonly called as " air switch " and also is meant low-voltage circuit breaker, and it is a kind of existing hand switch effect, can carry out decompression, under-voltage, overload and the electrical equipment of short-circuit protection again automatically.Low-voltage circuit breaker can be switched on or switched off circuit under normal duty, when failed because in the circuit or overload, low-voltage circuit breaker breaking circuit automatically plays the effect of protection gas circuit and electric equipment, and can prevent the accident expanded range.
The kind of low-voltage circuit breaker is a lot, but basic structure is identical with operation principle, generally includes shell and is located at contact system, tripping system and the arc-extinguishing mechanism in the shell.
Shown in Figure 1 is the structural representation of prior art mesolow breaker arc extinguishing mechanism; As shown in the figure; The yoke 3 that this breaker arc extinguishing mechanism comprises fixed contact 1, moving contact 2 and is positioned at fixed contact 1, moving contact 2 left sides, electric arc 100 produce between fixed contact 1, moving contact 2; Yoke 3 bottoms are provided with arc control device 4, and said fixed contact 1 is led arc plate 6 through contact plate 5 and fixed contact and linked to each other, and fixed contact is led the downside that arc plate 6 extends to arc control device 4.
Low-voltage circuit breaker of the prior art; Be arranged on the breaker arc extinguishing mechanism of its enclosure; Because fixed contact 1, moving contact 2 are positioned at the right side of arc control device 4; And electric arc 100 produces between fixed contact 1, moving contact 2, and therefore, existing structure can not fast and be introduced arc control device with electric arc effectively it is extinguished.
The utility model content
The technical problem that the utility model will solve provides a kind of low-voltage circuit breaker, and the inner arc-extinguishing mechanism of this low-voltage circuit breaker can guarantee that fast electric arc being introduced arc control device extinguishes, and then avoids the generation of fault, ensures Electrical Safety.
For addressing the above problem; A kind of low-voltage circuit breaker of the utility model; The contact system, tripping system and the arc-extinguishing mechanism that comprise shell and be arranged on enclosure; The yoke that said arc-extinguishing mechanism comprises fixed contact, moving contact and is positioned at fixed contact, moving contact left side, the yoke bottom is provided with arc control device, and said fixed contact is led the arc plate through contact plate and fixed contact and is linked to each other; Fixed contact is led the downside that the arc plate extends to arc control device, it is characterized in that: said breaker arc extinguishing mechanism comprises that also the moving contact between yoke and arc control device leads the arc plate; This moving contact is led the arc plate and is fixed on the yoke lower end, extends to the position near moving contact, and on the movement locus of this moving contact end of leading the arc plate when being positioned at moving contact and fixed contact disjunction.
Moving contact is led the lower end that the arc plate is fixed on yoke; With respect to being fixed on other positions; Be easier to the assembling of circuit breaker, and the position is provided with rationally, on the movement locus the when end that moving contact is led the arc plate is positioned at moving contact and fixed contact disjunction; Under the situation that does not influence moving contact and fixed contact disjunction, can guarantee to contact with the effective of moving contact.
Said moving contact is led the lower end that the arc plate is welded in yoke.Certainly, can also adopt other modes that moving contact is led the lower end that the arc plate is fixed on yoke, on behalf of the utility model, the mode that adopts welding only protect the fixed structure of this mode only as the optimal way of the utility model.
Said fixed contact is led arc plate, moving contact, and to lead the arc plate be copper coin.Copper coin has conductivity preferably, and price is comparatively cheap, is easy to machine-shaping.Certainly, said fixed contact is led the arc plate, moving contact is led the arc plate and can also be processed with other conductive plates.
The lower end that said fixed contact is led the arc plate is provided with flash barrier.
The main part of said flash barrier is a stalloy, the outside injection moulding nylon layer of stalloy.
Adopt the low-voltage circuit breaker of the utility model structure, be arranged on the arc-extinguishing mechanism of its enclosure, moving contact of welding is led the arc plate at the yoke place, and when the circuit breaker disjunction, the moving contact bullet leaves fixed contact, and this moving contact is led the arc plate and can be contacted with the moving contact inboard.Fixed contact is led the arc plate can cause the arc control device bottom with fixed contact side electric arc, and in like manner, moving contact is led the arc plate also can play effect same, makes electric arc get into speeding up of arc control device, and behind the alternating current circuit current over-zero, electric arc is with no longer resume combustion.
Description of drawings
Fig. 1 is the structural representation of arc-extinguishing mechanism in the prior art mesolow circuit breaker.
Fig. 2 is the structural representation of arc-extinguishing mechanism in the utility model low-voltage circuit breaker.
Embodiment
In order to make those skilled in the art person understand the utility model technical scheme better, the utility model is done further to specify below in conjunction with accompanying drawing and execution mode.
As shown in Figure 2, the low-voltage circuit breaker of the utility model, the contact system, tripping system and the arc-extinguishing mechanism that comprise shell and be arranged on enclosure.
The yoke 3 that said arc-extinguishing mechanism comprises fixed contact 1, moving contact 2 and is positioned at fixed contact 1, moving contact 2 left sides; Yoke 3 bottoms are provided with arc control device 4; Said fixed contact 1 is led arc plate 6 through contact plate 5 and fixed contact and is linked to each other; Fixed contact is led the downside that arc plate 6 extends to arc control device 4, and said Arc Distinguishing Device for Circuit Breakers comprises that also the moving contact between yoke 3 and arc control device 4 leads arc plate 7; This moving contact is led arc plate 7 and is fixed on yoke 3 lower ends; Extend to position near moving contact 2; And on the movement locus the when end that this moving contact is led arc plate 7 is positioned at moving contact 2 with fixed contact 1 disjunction; To guarantee that when the circuit breaker disjunction, moving contact 2 bullets leave fixed contact 1, this moving contact is led arc plate 7 and can be contacted with moving contact 2 inboards.
The preferred moving contact of the utility model is led the lower end that arc plate 7 is welded in yoke 3, can certainly adopt alternate manner that moving contact is led the lower end that arc plate 7 is fixed in yoke 3, thereby makes contact lead arc plate 7 and fixed contact is led the both sides that arc plate 6 lays respectively at arc control device 4.
Lead the arc effect preferably for reaching, said fixed contact is led arc plate 6, moving contact is led arc plate 7 and is copper coin, utilizes the preferable conductivity of copper material.
Adopt the low-voltage circuit breaker of the utility model structure, the arc-extinguishing mechanism of the portion that sets within it is dispersed to accumulating in electric arc 100 on fixed contact 1, the moving contact 2 that fixed contact is led arc plate 6, moving contact is led on the arc plate 7; And then re-boot to arc control device 4 two ends; Fast electric arc is introduced in the arc control device 4 and extinguished, the arcing time reduces 30%, has effectively protected fixed contact 1, moving contact 2 not to be burnt; Greatly improve the breaking capacity of circuit breaker, prolonged the useful life of miniature circuit breaker.
Claims (5)
1. low-voltage circuit breaker; The contact system, tripping system and the arc-extinguishing mechanism that comprise shell and be arranged on enclosure; The yoke that said arc-extinguishing mechanism comprises fixed contact, moving contact and is positioned at fixed contact, moving contact left side; The yoke bottom is provided with arc control device; Said fixed contact is led the arc plate through contact plate and fixed contact and linked to each other, and fixed contact is led the downside that the arc plate extends to arc control device, it is characterized in that: said breaker arc extinguishing mechanism comprises that also the moving contact between yoke and arc control device leads the arc plate; This moving contact is led the arc plate and is fixed on the yoke lower end, extends to the position near moving contact, and on the movement locus of this moving contact end of leading the arc plate when being positioned at moving contact and fixed contact disjunction.
2. low-voltage circuit breaker as claimed in claim 1 is characterized in that: said moving contact is led the lower end that the arc plate is welded in yoke.
3. low-voltage circuit breaker as claimed in claim 2 is characterized in that: said fixed contact is led arc plate, moving contact, and to lead the arc plate be copper coin.
4. like each described low-voltage circuit breaker of claim 1 to 3, it is characterized in that: the lower end that said fixed contact is led the arc plate is provided with flash barrier.
5. low-voltage circuit breaker as claimed in claim 4 is characterized in that: the main part of said flash barrier is a stalloy, the outside injection moulding nylon layer of stalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201521055U CN202523660U (en) | 2012-04-12 | 2012-04-12 | Low-voltage breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201521055U CN202523660U (en) | 2012-04-12 | 2012-04-12 | Low-voltage breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202523660U true CN202523660U (en) | 2012-11-07 |
Family
ID=47106595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201521055U Expired - Fee Related CN202523660U (en) | 2012-04-12 | 2012-04-12 | Low-voltage breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202523660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
-
2012
- 2012-04-12 CN CN2012201521055U patent/CN202523660U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20150412 |
|
| EXPY | Termination of patent right or utility model |