CN205092208U - Circuit breaker contact protection device - Google Patents
Circuit breaker contact protection device Download PDFInfo
- Publication number
- CN205092208U CN205092208U CN201520775350.5U CN201520775350U CN205092208U CN 205092208 U CN205092208 U CN 205092208U CN 201520775350 U CN201520775350 U CN 201520775350U CN 205092208 U CN205092208 U CN 205092208U
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- Prior art keywords
- arc
- cut
- moving contact
- arc cover
- contact
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- Expired - Fee Related
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- 238000010891 electric arc Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000009434 installation Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 206010037660 Pyrexia Diseases 0.000 abstract 1
- 230000003466 anti-cipated effect Effects 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a circuit breaker contact protection device, it includes moving contact (1), its characterized in that of: moving contact (1) go up to hang to be equipped with and cuts arc cover (2), cuts that arc cover (2) can rotate and cuts off the circuit breaker and divide the electric arc when disconnected rotating the in -process. The utility model discloses according to the motion characteristics that the moving contact closed the separating brake, the gravity that arc cover itself was cut in ingenious utilization makes arc extinguishing speed double, and electric arc dwell time is extremely short, and electric arc no. 1 produces, can be cut the arc cover and cut off, cuts the arc cover simultaneously and hugs closely moving contact arc undercut and cut, avoids the high -temperature region, arc and protection are cut in the completion, and the anticipated electric arc energy of greatly reduced effectively improves recovery voltage, reduces the contact degree of burning, increase and divide disconnected number of times, promote the specified operation index of product.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, specifically just relates to a kind of contact of breaker protective device, effectively can reduce contact and to burn degree, realizes the object to contact protection.
Background technology
Circuit breaker is the pith of distribution apparatus, is mainly used in industrial low-voltage power system, be used for connecting and electric current in disjunction mains-power circuit and protection circuit and power-supply device from the harm of the faults such as overload, under voltage, short circuit, single-phase earthing.
Circuit breaker is divided into primary cut-out and low-voltage circuit breaker by its scope of application.Low-voltage circuit breaker, also known as automatic switch, is commonly called as " air switch " and also refers to low-voltage circuit breaker, and it is a kind of existing hand switch effect, automatically can carry out again decompression, under-voltage, overload and the electrical equipment of short-circuit protection.It can be used to distribute electric energy; infrequently start asynchronous motor; protection is carried out to power circuit and motor etc.; can automatic shutdown circuit when serious overload or short circuit and the fault such as under-voltage occur for they; its function is equivalent to Fuse switch and the combination of crossing underheat relay etc.; and generally do not need to change parts after disjunction fault current, obtain a wide range of applications.
When circuit breaker is in running, when short circuit current being detected, controller can send sub-gate signal, and actuator's action makes operating mechanism separating brake.Because short circuit current is very big, the arc energy produced is also very large, in order to can extinguish fast electric arc and ensure that electric arc is not restriked phenomenon after zero passage, dynamic and static contact just must be made to disconnect from closing position fast, arrival open position.
In breaker open operation process, electric arc can be produced between dynamic/static contact, due to the hot properties of electric arc, the length of arcing time determines the degree that dynamic/static contact is burnt, directly can affect the interrupting performance of product, arc extinguishing scheme conventional at present has magnetic blow-out, air-blowing and narrow slit etc., mainly allows electric arc be transferred to extinguish arcs in arc control device from contact as early as possible by elongating arc, principle such as cooling electric arc, serial arc etc.Above arc extinguishing scheme is when lower operating voltage (below AC400V), and effect is comparatively obvious, but when high voltage, often there will be lasting arcing, the phenomenon of restriking again after arc extinction.The technical barrier of arc reignition during in order to solve high voltage, what take at present is effectively reduce the time of staying scheme of electric arc on contact, but because of the space of product and the restriction of intensity, and the time compole of extinguish arcs actual needs is short, for Millisecond, therefore, existing arc extinguishing scheme all cannot avoid contact by the defect of burning, Chinese patent CN1209776 discloses a kind of circuit breaker forced extinguisher, a flash barrier is set up in circuit breaker, this flash barrier is positioned at the below of dynamic/static contact when closing a floodgate, the below of flash barrier and the top of moving contact is connected with block connecting rod, and this connecting rod is also connected with the guide-bar mechanism of the constraint flash barrier direction of motion, this arc-control device utilizes guiding mechanism to control flash barrier motion, add run duration, the requirement of arc extinguishing at Millisecond cannot be realized, still the phenomenon that can cause when high voltage restriking burns contact.
Utility model content
The purpose of this utility model is exactly arc reignition cannot be avoided for existing various contact protection scheme to burn the technological deficiency of contact at high pressure conditions; a kind of contact of breaker protective device is provided; according to the movement characteristic of moving contact on/off switch; automatically complete the cut-out to electric arc, realize the protection object to contact of breaker.
Technical scheme
In order to realize above-mentioned technical purpose; a kind of contact of breaker protective device of the utility model design; it comprises moving contact, it is characterized in that: described moving contact has mounted and has cut arc cover, cuts electric arc when arc cover can rotate and cut off circuit breaker disjunction in rotation process.
Further, described moving contact side is provided with installation shaft, cut arc cover termination and be mounted on the axle head of installation shaft, moving contact is arranged on moving contact bearing, and cutting arc cover can swing back and forth around installation shaft, cuts arc cover swing two-end-point and limits by moving contact bearing.
Further, described in cut arc cover be that U-shaped cuts arc cover, U-shaped is cut arc cover two ends and is mounted on the axle head of installation shaft.
Further, cut arc described in cover on two-end-point position in swing process and rest respectively on the step of moving contact bearing.
Further, cutting arc cover described in is insulating part.
Beneficial effect
A kind of contact of breaker protective device that the utility model provides, according to the movement characteristic of moving contact on/off switch, the gravity cutting arc cover itself is utilized to make arc extinguishing speed doublings cleverly, the electric arc time of staying is extremely short, electric arc one produces, arc cover can be cut cut off, cut arc cover simultaneously and be close to the cutting of moving contact arc root, avoid high-temperature region; Complete and cut arc and protection, greatly reduce expection arc energy, effectively improve recovery voltage, reduce contact and to burn degree, increase disjunction number of times, the specified operating index of improving product.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the utility model embodiment.
Accompanying drawing 2 is moving contact separating brake initial state schematic diagrames in the utility model embodiment.
Accompanying drawing 3 is moving contact separating brake process status schematic diagrames in the utility model embodiment.
Accompanying drawing 4 is moving contact separating brake completion status schematic diagrames in the utility model embodiment.
Accompanying drawing 5 is switch on of moving contact initial state schematic diagrames in the utility model embodiment.
Accompanying drawing 6 is switch on of moving contact process status schematic diagrames in the utility model embodiment.
Accompanying drawing 7 is switch on of moving contact completion status schematic diagrames in the utility model embodiment.
Accompanying drawing 8 is the structural representations cutting arc cover in the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Embodiment
As shown in Figure 1, a kind of contact of breaker protective device, it comprises moving contact 1, described moving contact 1 has mounted and has cut arc cover 2, cuts electric arc when arc cover 2 can rotate and cut off circuit breaker disjunction in rotation process.
Described moving contact 1 side is provided with installation shaft 3, and cut arc cover 2 termination and be mounted on the axle head of installation shaft 3, moving contact 1 is arranged on moving contact bearing 4, and cutting arc cover 2 can swing back and forth around installation shaft 3, cuts arc cover 2 and swings two-end-point by moving contact bearing 4 and limit.
As shown in Figure 8, described in cut arc cover 2 for U-shaped and cut arc cover, U-shaped is cut arc cover 2 two ends and is mounted on the axle head of installation shaft 3.
Described arc cover 2 two-end-point position in swing process of cutting rests on the step of moving contact bearing 4 respectively.
Described arc cover 2 of cutting is for insulating part.
As accompanying drawing 2, shown in 3 and 4, when carrying out sub-switching operation, when moving contact 1 has just started disjunction, moving contact 1 is pulled open at a high speed, cut arc cover 2 to be freely connected with moving contact 1 by installation shaft 3, cutting arc cover 2 utilizes own wt to the direction motion covering moving contact 1, by rotating, reach on moving contact bearing 4 and stop, continue to move together with moving contact 1, in this process, start to produce electric arc between moving contact 1 and fixed contact 5, cut arc cover 2 close to the bottom of moving contact bearing 4 by rotating, in approach process, from arc root progressively breaking arc, when cutting arc cover 2 and contacting with moving contact bearing 4, electric arc is fully shut off, at the after-stage of separating brake motion, moving contact 1 reduces speed now, until stop, cutting arc cover 2 and can swing several times, be parked in the bottom of moving contact bearing 4, sub-switching operation completes.
As shown in accompanying drawing 5,6 and 7, when closing operation, moving contact 1 rotates to fixed contact 5 fast, now cut arc cover 2 and be parked in moving contact bearing 4 bottom, cutting arc cover 2 can because of the centrifugal force of motion, and the top to moving contact bearing 4 is rotated, and the spacing top at moving contact bearing 4, move together with moving contact 1, when moving contact 1 contacts with fixed contact 5, speed reduces, until stop, this process, cut arc cover 2 to move to fixed contact 5, after encountering fixed contact 5, stop motion, completes closing operation.
A kind of contact of breaker protective device that the utility model provides, according to the movement characteristic of moving contact on/off switch, the gravity cutting arc cover itself is utilized to make arc extinguishing speed doublings cleverly, the electric arc time of staying is extremely short, electric arc one produces, arc cover can be cut cut off, cut arc cover simultaneously and be close to the cutting of moving contact arc root, avoid high-temperature region; Complete and cut arc and protection, greatly reduce expection arc energy, effectively improve recovery voltage, reduce contact and to burn degree, increase disjunction number of times, the specified operating index of improving product.Replacement of products cost can be reduced, reduce maintenance cost.
Structure, ratio, size etc. that the present embodiment institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the utility model, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the utility model can produce and the object that can reach, still all should drop on technology contents that the utility model discloses and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre ", " clockwise ", " counterclockwise " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the utility model.
Claims (5)
1. a contact of breaker protective device; it comprises moving contact (1); it is characterized in that: described moving contact (1) has mounted and has cut arc cover (2), cut electric arc when arc cover (2) can rotate and cut off circuit breaker disjunction in rotation process.
2. a kind of contact of breaker protective device as claimed in claim 1; it is characterized in that: described moving contact (1) side is provided with installation shaft (3); cutting arc cover (2) termination is mounted on the axle head of installation shaft (3); moving contact (1) is arranged on moving contact bearing (4); cut arc cover (2) to swing back and forth around installation shaft (3), cut arc cover (2) and swing two-end-point by moving contact bearing (4) restriction.
3. a kind of contact of breaker protective device as claimed in claim 2, is characterized in that: described in cut arc cover (2) for U-shaped and cut arc cover, U-shaped is cut arc cover (2) two ends and is mounted on the axle head of installation shaft (3).
4. a kind of contact of breaker protective device as claimed in claim 2, is characterized in that: described in cut arc cover (2) two-end-point position in swing process and rest respectively on the step of moving contact bearing (4).
5. a kind of contact of breaker protective device as claimed in claim 1, is characterized in that: described in cut arc cover (2) be insulating part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775350.5U CN205092208U (en) | 2015-09-30 | 2015-09-30 | Circuit breaker contact protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520775350.5U CN205092208U (en) | 2015-09-30 | 2015-09-30 | Circuit breaker contact protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205092208U true CN205092208U (en) | 2016-03-16 |
Family
ID=55482868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520775350.5U Expired - Fee Related CN205092208U (en) | 2015-09-30 | 2015-09-30 | Circuit breaker contact protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205092208U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558463A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | A kind of contact of breaker protection device |
| CN108987139A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
-
2015
- 2015-09-30 CN CN201520775350.5U patent/CN205092208U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558463A (en) * | 2015-09-30 | 2017-04-05 | 上海良信电器股份有限公司 | A kind of contact of breaker protection device |
| CN106558463B (en) * | 2015-09-30 | 2019-06-14 | 上海良信电器股份有限公司 | A kind of contact of breaker protective device |
| CN108987139A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
| CN108987139B (en) * | 2017-06-01 | 2024-02-02 | 泰科电子(深圳)有限公司 | Electrical contact system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 |