CN203150458U - Self-cut-off contact mechanism for air switch - Google Patents
Self-cut-off contact mechanism for air switch Download PDFInfo
- Publication number
- CN203150458U CN203150458U CN 201320170294 CN201320170294U CN203150458U CN 203150458 U CN203150458 U CN 203150458U CN 201320170294 CN201320170294 CN 201320170294 CN 201320170294 U CN201320170294 U CN 201320170294U CN 203150458 U CN203150458 U CN 203150458U
- Authority
- CN
- China
- Prior art keywords
- contact
- control device
- moving contact
- air switch
- nonlinear resistance
- 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
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to the field of electrical equipment, and particularly relates to a self-cut-off contact mechanism for an air switch. The self-cut-off contact mechanism comprises an insulating arc-extinguishing chamber shell, a static contact, a movable contact, a nonlinear resistor chamber and a nonlinear resistor, wherein the contact point end of the movable contact is arranged in the insulating arc-extinguishing chamber shell and matched with the contact point end of the static contact; the nonlinear resistor is arranged in the nonlinear resistor chamber; the both ends of the nonlinear resistor are connected with the connecting terminals of the static contact and the movable contact respectively; an insulating sheet is arranged in the insulating arc-extinguishing chamber shell; the bottom of the insulating sheet is installed on the inner wall of the insulating arc-extinguishing chamber shell via a compression spring; the head of the insulating sheet is wedge-shaped and abutted with the outer wall of the movable contact; and when the movable contact is cut off, the insulating sheet stretches between the static contact and the movable contact under the pushing of the compression spring. According to the self-cut-off contact mechanism disclosed by the utility model, when the movable contact is cut off, the insulating sheet automatically stretches between the static contact and the movable contact to cut off an electric arc, thus improving the arc-extinguishing capacity, and ensuring the safe running of electrical equipment.
Description
Technical field
The utility model relates to field of electrical equipment, relates in particular to a kind of air switch.
Background technology
Air switch is very important a kind of electrical equipment in low voltage power distribution network and the electric drive system, and it integrates control and kinds of protect function.Except finishing contact and branch deenergizing, still can be to the short circuit of circuit or electric equipment generation. seriously overload and under voltage etc. are protected, and also can be used for not actuating motor continually simultaneously.
Air switch is generally low pressure, and namely rated operational voltage is 1kV, is to have the switch kinds of protect function, can cut off and connect circuit under rated voltage and rated operational current situation.The type of its defencive function and protected mode are selected as required by the user.As short-circuit protection, overcurrent protection, shunt opening control, under-voltage protection etc.Existing air switch can produce electric arc because of super large voltage when disconnecting, so all arc-extinguish chamber or kindred organization can be set usually, in some high-tension apparatus, only depend on the arc-extinguish chamber may be effectively during arc extinguishing, can be used in dynamic/static contact two ends nonlinear resistance in parallel, current transfer to nonlinear resistance, is conducive to extinguishing of electric arc, the useful life of prolongation equipment and reliability, but the arc extinguishing ability still needs to strengthen in some cases.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of from cutting off the air switch contact mechanism, by an insulating trip that is promoted by the compression spring is set in insulation arc control device housing, when moving contact disconnects, insulating trip extend between fixed contact and the moving contact automatically, breaking arc, improve the arc extinguishing ability, guaranteed the safe operation of electrical equipment.
The utility model is achieved in that a kind of from cutting off the air switch contact mechanism, comprise insulation arc control device housing, fixed contact, moving contact, nonlinear resistance chamber and nonlinear resistance, the tip side of described fixed contact is fixedly installed in the insulation arc control device housing, and the terminals of fixed contact stretch out insulation arc control device housing; The terminals of the described moving contact brake separating mechanism outer with being arranged on insulation arc control device housing links to each other, the tip side of moving contact is arranged in the insulation arc control device housing and matches with the tip side of fixed contact, described nonlinear resistance is arranged in the nonlinear resistance chamber, the two ends of described nonlinear resistance link to each other with the terminals of fixed contact and moving contact respectively, be provided with insulating trip in the described insulation arc control device housing, the bottom of described insulating trip is installed on the insulation arc control device inner walls by the compression spring, the head of insulating trip is that wedge shape abuts on the outer wall of moving contact, and insulating trip extend between fixed contact and the moving contact under the promotion of compression spring when moving contact was opened.
Described nonlinear resistance is made of the some stacked series connection of non-linear resistor.
Described insulation arc control device housing and nonlinear resistance chamber are that insulating ceramics is made.
Link to each other by conducting strip between the exit of described moving contact and moving contact.
The tip side of described fixed contact is covered with radome.
Described moving contact tip side is with bellows outward.
The utility model is from cut off the air switch contact mechanism by an insulating trip that is promoted by the compression spring is set in insulation arc control device housing, when moving contact disconnects, insulating trip extend between fixed contact and the moving contact automatically, and breaking arc has improved the arc extinguishing ability; The auxiliary arc extinguishing of the resistance characteristic of recycling nonlinear resistance in addition, the arc extinguishing ability is strong, good pressure-resistant performance, the life-span is long, no electric arc sprays outward, volume is little, in light weight, maintenance cycle is longer, is applicable in the circuit of higher pressure, has guaranteed the safe operation of electrical equipment.
Description of drawings
Fig. 1 cuts off air switch contact mechanism structural representation certainly for the utility model.
Among the figure: 1 insulation arc control device housing, 2 fixed contacts, 3 moving contacts, 4 brake separating mechanisms, nonlinear resistance chambers 5,6 nonlinear resistances, 7 insulating trips, 8 conducting strips, 9 radomes, 10 bellowss, 11 compression springs.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only are used for explanation the utility model and are not used in the scope of the present utility model that limits.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model statement, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 1, a kind of from cutting off the air switch contact mechanism, comprise insulation arc control device housing 1, fixed contact 2, moving contact 3, nonlinear resistance chamber 5 and nonlinear resistance 6, the tip side of described fixed contact 2 is fixedly installed in the insulation arc control device housing 1, and the terminals of fixed contact 2 stretch out insulation arc control device housing 1; The terminals of described moving contact 3 brake separating mechanism 4 outer with being arranged on insulation arc control device housing 1 links to each other, the tip side of moving contact 3 is arranged in the insulation arc control device housing 1 and matches with the tip side of fixed contact 2, described nonlinear resistance 6 is arranged in the nonlinear resistance chamber 5, the two ends of described nonlinear resistance 6 link to each other with the terminals of fixed contact 2 with moving contact 3 respectively, be provided with insulating trip 7 in the described insulation arc control device housing 1, the bottom of described insulating trip 7 is installed on insulation arc control device housing 1 inwall by compression spring 11, the head of insulating trip 7 is that wedge shape abuts on the outer wall of moving contact 3, insulating trip 7 extend into breaking arc between fixed contact 2 and the moving contact 3 when moving contact 3 was opened under the promotion of compression spring 11, when moving contact 3 is closed, promote the lozenges return of insulating trip 7, do not influence the operate as normal of switch contact; In order to prevent insulating trip 7 and compression spring 11 sideslips, described insulating trip 7 and compression spring 11 are outside equipped with fairlead.
In the present embodiment, link to each other by conducting strip 8 between the exit of described moving contact 3 and moving contact 3.
In the present embodiment, the electric arc that produces in order to avoid separating brake the time wounds equipment, and in the present embodiment, the tip side of described fixed contact 2 is covered with radome 9, and described moving contact 3 tip sides are with bellows 10 outward.
The utility model can further describe into, make for insulating ceramics described insulation arc control device housing 1 and nonlinear resistance chamber 5, the nonlinear resistance 6 that wherein is arranged in the nonlinear resistance chamber 5 is made of the some stacked series connection of non-linear resistor, usually use the non-linear resistor of 10～15 series connection to do in the present embodiment, nonlinear resistance 6 is connected in parallel on the terminals of dynamic and static contact, the overvoltage when preventing the air switch separating brake.Non-linear resistor adopts carborundum and bond sintering to form, and its resistance value descends with the rising of applied voltage, places the nonlinear resistance chamber 5 of hollow insulation.
Moving contact 3 during separating brake, produces electric arc between dynamic and static contact under the drive of brake separating mechanism 4, in the blow-out process, the voltage between the tip side of dynamic and static contact will sharply increase.When voltage was increased to certain value, the resistance value of nonlinear resistance 6 descended rapidly, and the electric current on the dynamic and static contact is transferred to rapidly on the nonlinear resistance 6, but both over-voltages reduces voltage recovery rate, is conducive to extinguishing of electric arc again, reduced the contact electrical wear.Along with the reduction of nonlinear resistance 6 both end voltage, its resistance increases rapidly again, to reduce aftercurrent, guarantees that air switch almost disconnects under no current, has improved the reliable breaking of air switch.
Claims (6)
1. one kind is cut off the air switch contact mechanism certainly, comprise insulation arc control device housings (1), fixed contact (2), moving contact (3), nonlinear resistance chamber (5) and nonlinear resistance (6), the tip side of described fixed contact (2) is fixedly installed in the insulation arc control device housings (1), and the terminals of fixed contact (2) stretch out insulation arc control device housings (1); The terminals of described moving contact (3) brake separating mechanism (4) outer with being arranged on insulation arc control device housings (1) links to each other, the tip side of moving contact (3) is arranged in the insulation arc control device housings (1) and matches with the tip side of fixed contact (2), described nonlinear resistance (6) is arranged in the nonlinear resistance chamber (5), the two ends of described nonlinear resistance (6) link to each other with the terminals of fixed contact (2) with moving contact (3) respectively, it is characterized in that: be provided with insulating trip (7) in the described insulation arc control device housing (1), the bottom of described insulating trip (7) is installed on insulation arc control device housings (1) inwall by compression spring (11), the head of insulating trip (7) is that wedge shape abuts on the outer wall of moving contact (3), moving contact (3) when opening insulating trip (7) the compression spring (11) promotion under extend between fixed contact (2) and the moving contact (3).
2. as claimed in claim 1 from cutting off the air switch contact mechanism, it is characterized in that: described nonlinear resistance (6) is made of the some stacked series connection of non-linear resistor.
3. as claimed in claim 1 from cutting off the air switch contact mechanism, it is characterized in that: make for insulating ceramics described insulation arc control device housing (1) and nonlinear resistance chamber (5).
4. described from cutting off the air switch contact mechanism as any claim in the claim 1～3, it is characterized in that: link to each other by conducting strip (8) between the exit of described moving contact (3) and moving contact (3).
5. described from cutting off the air switch contact mechanism as any claim in the claim 1～3, it is characterized in that: the tip side of described fixed contact (2) is covered with radome (9).
6. described from cutting off the air switch contact mechanism as any claim in the claim 1～3, it is characterized in that: described moving contact (3) tip side is with bellows (10) outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170294 CN203150458U (en) | 2013-03-26 | 2013-03-26 | Self-cut-off contact mechanism for air switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320170294 CN203150458U (en) | 2013-03-26 | 2013-03-26 | Self-cut-off contact mechanism for air switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203150458U true CN203150458U (en) | 2013-08-21 |
Family
ID=48977966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320170294 Expired - Fee Related CN203150458U (en) | 2013-03-26 | 2013-03-26 | Self-cut-off contact mechanism for air switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203150458U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269708A (en) * | 2018-01-17 | 2018-07-10 | 安徽中骄智能科技有限公司 | It is a kind of based on the high-voltage contact arc extinguishing structure device adjusted from return type |
| CN111816502A (en) * | 2020-08-27 | 2020-10-23 | 广东电网有限责任公司东莞供电局 | Operating mechanism of vacuum circuit breaker |
-
2013
- 2013-03-26 CN CN 201320170294 patent/CN203150458U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108269708A (en) * | 2018-01-17 | 2018-07-10 | 安徽中骄智能科技有限公司 | It is a kind of based on the high-voltage contact arc extinguishing structure device adjusted from return type |
| CN111816502A (en) * | 2020-08-27 | 2020-10-23 | 广东电网有限责任公司东莞供电局 | Operating mechanism of vacuum circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104813432B (en) | Surge protection device having short-circuit current protection function | |
| CN203150458U (en) | Self-cut-off contact mechanism for air switch | |
| CN203205290U (en) | Air switch contact mechanism provided with grounding contacts | |
| CN108022814A (en) | A kind of miniature circuit breaker arc quenching system | |
| CN201741639U (en) | AC-operation DC contactor | |
| CN203150470U (en) | Contact mechanism for balloon arc-extinguishing air switch | |
| CN206441677U (en) | The backup protection breaker of surge protector | |
| CN203134625U (en) | An elastically-contacted air switch contact mechanism | |
| CN201918340U (en) | Small-sized circuit breaker | |
| CN202126958U (en) | Safety structure of sulfur hexafluoride breaker body | |
| CN203134693U (en) | A linkage blowing and spraying arc extinguishing air switch contact mechanism | |
| CN203134655U (en) | An air switch contact mechanism containing drying agent | |
| CN203674059U (en) | Pressure-operated load switch | |
| CN203134590U (en) | A split air switch contact mechanism | |
| CN202957217U (en) | Disconnecting switch and vacuum circuit breaker composite system | |
| CN1622250A (en) | Circuit breaker | |
| CN109786172B (en) | Built-in isolated vacuum arc-extinguishing chamber component and vacuum circuit breaker | |
| CN102623219A (en) | Disconnecting switch and vacuum circuit breaker composite system | |
| CN207302967U (en) | A kind of internal structure is easily installed circuit protection breaker | |
| CN201294378Y (en) | Switch arc-extinguishing and over-voltage protection | |
| CN205789779U (en) | Breaker of plastic casing | |
| CN203134604U (en) | An elastic static contact air switch contact mechanism | |
| CN202142462U (en) | Low-impedance high-pressure disconnector knife brake device | |
| CN215342417U (en) | Vacuum circuit breaker and vacuum circuit breaking protection system | |
| CN211859599U (en) | Surge protector |
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: 20130821 Termination date: 20140326 |