CN203205290U - Air switch contact mechanism provided with grounding contacts - Google Patents
Air switch contact mechanism provided with grounding contacts Download PDFInfo
- Publication number
- CN203205290U CN203205290U CN 201320178139 CN201320178139U CN203205290U CN 203205290 U CN203205290 U CN 203205290U CN 201320178139 CN201320178139 CN 201320178139 CN 201320178139 U CN201320178139 U CN 201320178139U CN 203205290 U CN203205290 U CN 203205290U
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- CN
- China
- Prior art keywords
- contact
- air switch
- moving contact
- control device
- nonlinear resistance
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- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to the field of electrical equipment, and specifically relates to an air switch. An air switch contact mechanism is provided with grounding contacts, and comprises an insulating arc extinguish chamber housing, a stationary contact, a moving contact, a non-linear resistor chamber and a non-linear resistor. The non-linear resistor is disposed in the non-linear resistor chamber. One end of the non-linear resistor is connected to a terminal of the stationary contact, and the other end of the non-linear resistor is connected to a terminal of the moving contact. The inner wall of the insulating arc extinguish chamber is provided with an extended grounding stationary contact piece. The moving contact is connected with a grounding moving contact piece. The grounding stationary piece is connected to a grounding wire. When the moving contact and the stationary contact are disconnected, the grounding moving contact piece and the grounding stationary contact piece are attached and conducted. When the air switch contact mechanism is opened, the moving contact can be grounded by the air switch contact mechanism, and the capability of arc extinguish is improved greatly. The air switch contact mechanism is characterized by high arc extinguish capability, good pressure resistance, long service lifetime, no external arc spray, small size, light weight and long maintenance period, is applicable to circuits with higher voltage, and ensures safety operation for 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, with current transfer to nonlinear resistance, be conducive to extinguishing of electric arc, the useful life of prolongation equipment and reliability, but along with more and more higher to the air switch performance demands, only Yi Shang structure also is not enough to meet the demands.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of air switch contact mechanism with grounding wafer, can be with moving contact ground connection when separating brake, improve the ability of arc extinguishing greatly, be applicable in the circuit of higher pressure, guaranteed the safe operation of electrical equipment.
The utility model is achieved in that a kind of air switch contact mechanism with grounding wafer, 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, the one ground connection static contact that stretches out is housed on the inwall of described insulation arc control device housing, be connected with the ground connection movable contact spring on the described moving contact, described ground connection static contact links to each other with earth connection, when moving contact and fixed contact disconnect, the conducting of fitting mutually of ground connection movable contact spring and ground connection static contact.
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 air switch contact mechanism of the utility model band grounding wafer can improve the ability of arc extinguishing greatly with moving contact ground connection when separating brake; Utilize the auxiliary arc extinguishing of resistance characteristic of nonlinear resistance simultaneously, 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 is the air switch contact mechanism structural representation of the utility model band grounding wafer.
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 earth connections, 8 conducting strips, 9 radomes, 10 bellowss, 11 ground connection movable contact springs, 12 ground connection static contacts.
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 air switch contact mechanism with grounding wafer, 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, the two ends of described nonlinear resistance link to each other with the terminals of fixed contact and moving contact respectively, the one ground connection static contact 12 that stretches out is housed on the inwall of described insulation arc control device housing 1, be connected with ground connection movable contact spring 11 on the described moving contact 3, described ground connection static contact 12 links to each other with earth connection 7, when moving contact 3 disconnects with fixed contact 2, ground connection movable contact spring 11 and the 12 mutual applying conductings of ground connection static contact, when moving contact 3 under the drive of brake separating mechanism 4 during separating brake, moving contact 3 is by ground connection movable contact spring 11 and ground connection static contact 12 and earth connection 7 conductings, electric arc between fixed contact 2 and the moving contact 3 dissipates along earth connection 7 at this moment, is conducive to extinguishing of electric arc.
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, its resistance value descends with the rising of applied voltage, place the nonlinear resistance chamber 5 of hollow insulation, moving contact 3 is under the drive of brake separating mechanism 4 during separating brake, produce electric arc between dynamic and static contact, 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. air switch contact mechanism with grounding wafer, 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: a ground connection static contact (12) that stretches out is housed on the inwall of described insulation arc control device housing (1), be connected with ground connection movable contact spring (11) on the described moving contact (3), described ground connection static contact (12) links to each other with earth connection (7), when moving contact (3) and fixed contact (2) disconnect, the conducting of fitting mutually of ground connection movable contact spring (11) and ground connection static contact (12).
2. the air switch contact mechanism of band grounding wafer as claimed in claim 1, it is characterized in that: described nonlinear resistance (6) is made of the some stacked series connection of non-linear resistor.
3. the air switch contact mechanism of band grounding wafer as claimed in claim 1, it is characterized in that: make for insulating ceramics described insulation arc control device housing (1) and nonlinear resistance chamber (5).
4. as the air switch contact mechanism of the described band grounding wafer of 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. as the air switch contact mechanism of the described band grounding wafer of 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. as the air switch contact mechanism of the described band grounding wafer of 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 201320178139 CN203205290U (en) | 2013-03-31 | 2013-03-31 | Air switch contact mechanism provided with grounding contacts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320178139 CN203205290U (en) | 2013-03-31 | 2013-03-31 | Air switch contact mechanism provided with grounding contacts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205290U true CN203205290U (en) | 2013-09-18 |
Family
ID=49149373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320178139 Expired - Fee Related CN203205290U (en) | 2013-03-31 | 2013-03-31 | Air switch contact mechanism provided with grounding contacts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205290U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404015A (en) * | 2017-07-27 | 2017-11-28 | 国网安徽省电力公司检修公司 | A kind of Power System Intelligent arc-extinguishing grounding device |
| CN108074765A (en) * | 2018-01-17 | 2018-05-25 | 安徽中骄智能科技有限公司 | A kind of electrode plate absorption type electrical contact arc-control device being closed based on linkage |
-
2013
- 2013-03-31 CN CN 201320178139 patent/CN203205290U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107404015A (en) * | 2017-07-27 | 2017-11-28 | 国网安徽省电力公司检修公司 | A kind of Power System Intelligent arc-extinguishing grounding device |
| CN107404015B (en) * | 2017-07-27 | 2023-10-03 | 国网安徽省电力有限公司超高压分公司 | Intelligent arc extinguishing grounding device of power system |
| CN108074765A (en) * | 2018-01-17 | 2018-05-25 | 安徽中骄智能科技有限公司 | A kind of electrode plate absorption type electrical contact arc-control device being closed based on linkage |
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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: 20130918 Termination date: 20140331 |