CN202127242U - Arc extinction and overvoltage protection device - Google Patents
Arc extinction and overvoltage protection device Download PDFInfo
- Publication number
- CN202127242U CN202127242U CN201120201674XU CN201120201674U CN202127242U CN 202127242 U CN202127242 U CN 202127242U CN 201120201674X U CN201120201674X U CN 201120201674XU CN 201120201674 U CN201120201674 U CN 201120201674U CN 202127242 U CN202127242 U CN 202127242U
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- overvoltage protection
- extinguishing arc
- microprocessor
- phase
- voltage
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Abstract
The utility model specifically relates to an arc extinction and overvoltage protection device, comprising a signal collecting module for collecting three-phase voltage and opening voltage provided by a voltage mutual inductor. The output end thereof is connected with a microcomputer, the output end of the microcomputer is connected with three vacuum contactors which are further connected in series between each phase of the three-phase bus and the ground respectively. A power supply provides power. The microcomputer judges malfunction according to the three-phase voltage and opening voltage provided by the voltage mutual inductor and drives corresponding vacuum contactor to move so as to eliminate arc according to the judging result. The device can effectively eliminate arc light generated in the power grid and improve the operational safety of the power grid and the reliability of power supply.
Description
Technical field
The utility model relates to a kind of electric network protection device, is specifically related to a kind of extinguishing arc and overvoltage protection.
Background technology
China 3～35KV electrical network is isolated neutral system mostly; When single-phase intermittence arc grounding fault takes place in neutral point non-direct grounding system; Because electric arc repeatedly constantly extinguishes and restrikes; Cause the repeatedly constantly accumulation and reallocation again of electric charge on system's direct-to-ground capacitance, on the inductor-capacitor loop of non-fault phase, cause higher-order of oscillation overvoltage.For being main power supply grid with the cable, the overvoltage of non-fault phase can reach 4～71 times.So high overvoltage acts on electrical network, very easily damages the insulation of electric equipment, and the insulation of electric equipment will form the weak spot of insulation through accumulation property damage several times, and then produces the accident that insulation against ground punctures and cause phase fault.
Summary of the invention
The purpose of the utility model provides a kind of extinguishing arc and overvoltage protection, can eliminate the arc light that produces in the electrical network and carry out overvoltage protection, improves the fail safe of operation of power networks and the reliability of power supply.
For realizing above-mentioned purpose; The utility model has adopted following technical scheme: this device comprises signal acquisition module; Said signal acquisition module is gathered three-phase voltage and the opening voltage that voltage transformer provides, and its output links to each other with microprocessor, three vacuum contactors of the output termination of microprocessor; Three vacuum contactors also are connected on respectively between the every phase and ground of three-phase bus, and supply unit provides power supply.
Can know that by technique scheme microprocessor is judged fault according to three-phase voltage and opening voltage that voltage transformer provides, and driven corresponding vacuum contactor action, elimination electric arc according to judged result.This device can effectively be eliminated the arc light that produces in the electrical network, has improved the reliability of the fail safe and the power supply of operation of power networks.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Embodiment
As shown in Figure 1; The utility model comprises signal acquisition module 1; Said signal acquisition module 1 is gathered three-phase voltage and the opening voltage that voltage transformer provides, and its output links to each other with microprocessor 5, three vacuum contactors 6 of the output termination of microprocessor 5; Three vacuum contactors 6 also are connected on respectively between the every phase and ground of three-phase bus, and supply unit 4 provides power supply.
Three-phase voltage is the low pressure three-phase of bus three-phase after the voltage transformer conversion, and opening voltage is the induced voltage after three-phase voltage passes through zero sequential potential transformer.System's pairs of openings voltage carries out high-speed sampling under the normal condition, and three-phase voltage low speed is sampled.This moment, the value of opening voltage was very low, be close to 0, and the three-phase voltage value was equal basically, phase phasic difference 120 degree.In case three-phase electricity is pressed with one mutually or during heterogeneous going wrong, the vector of three-phase voltage is balance no longer then, promptly vector be not 0, and opening voltage be the reflection three-phase vector and value, i.e. opening voltage rising suddenly.Systematic sampling opening voltage also carries out high-speed sampling to three-phase voltage when being elevated to the greatest limit of regulation immediately; Which is judged breaks down mutually; And vacuum contactor 6 closures of driving malfunction phase; So that this is quickly converted to stable metallic earthing by unsettled arc grounding, the fault phase voltage reduces to 0, loss of voltage.This device can effectively be eliminated the arc grounding fault to the harm that power equipment brings, and has improved the reliability of the fail safe and the power supply of operation of power networks.
Described extinguishing arc and overvoltage protection also comprise switch acquisition module 2, and the output of said switch acquisition module 2 links to each other with the input of microprocessor 5.Switch acquisition module 2 is used to gather the operate condition of vacuum contactor 6 and is delivered to microprocessor 5; When microprocessor judges goes out one of three-phase voltage and breaks down mutually; Whether meeting is judged with this vacuum contactor that is in series 6 closed, like closure, then is failure to actuate; As not closed, it is closed then to drive this vacuum contactor.
Described extinguishing arc and overvoltage protection also comprise Keyboard Control module 3, and the output of said Keyboard Control module 3 links to each other with the input of microprocessor 5.Described extinguishing arc and overvoltage protection also comprise display module 7, and the input of said display module 7 links to each other with the output of microprocessor 5.Keyboard Control module 3 and display module 7 are carried out relevant parameters setting, fault alarm demonstration as man-machine dialog interface.
Described extinguishing arc and overvoltage protection also comprise alarm module 8, and the input of said alarm module 8 links to each other with the output of microprocessor 5.
When microprocessor 5 is judged when breaking down, except driving vacuum contactor 6 actions, also can drive alarm module 8 and report to the police, and show fault messages through display module 7.
Described extinguishing arc and overvoltage protection also comprise communication module 9, and said communication module 9 links to each other with microprocessor 5.Microprocessor 5 can arrive the backstage Central Control Room to the state of current system and fault upload through communication module 9, is convenient to management and inquiry.
Claims (6)
1. extinguishing arc and overvoltage protection; It is characterized in that: this device comprises signal acquisition module (1); Said signal acquisition module (1) is gathered three-phase voltage and the opening voltage that voltage transformer provides, and its output links to each other with microprocessor (5), three vacuum contactors of the output termination of microprocessor (5) (6); Three vacuum contactors (6) also are connected on respectively between the every phase and ground of three-phase bus, and supply unit (4) provides power supply.
2. extinguishing arc according to claim 1 and overvoltage protection; It is characterized in that: described extinguishing arc and overvoltage protection also comprise switch acquisition module (2); Be used to gather the operate condition of vacuum contactor (6), the input of the output termination microprocessor (5) of said switch acquisition module (2).
3. extinguishing arc according to claim 1 and 2 and overvoltage protection; It is characterized in that: described extinguishing arc and overvoltage protection also comprise Keyboard Control module (3); Be used for the parameter setting, the output of said Keyboard Control module (3) links to each other with the input of microprocessor (5).
4. extinguishing arc according to claim 1 and overvoltage protection is characterized in that: described extinguishing arc and overvoltage protection also comprise display module (7), and the input of said display module (7) links to each other with the output of microprocessor (5).
5. extinguishing arc according to claim 1 and overvoltage protection is characterized in that: described extinguishing arc and overvoltage protection also comprise alarm module (8), and the input of said alarm module (8) links to each other with the output of microprocessor (5).
6. extinguishing arc according to claim 1 and overvoltage protection is characterized in that: described extinguishing arc and overvoltage protection also comprise communication module (9), and said communication module (9) links to each other with microprocessor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201674XU CN202127242U (en) | 2011-06-16 | 2011-06-16 | Arc extinction and overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120201674XU CN202127242U (en) | 2011-06-16 | 2011-06-16 | Arc extinction and overvoltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202127242U true CN202127242U (en) | 2012-01-25 |
Family
ID=45490304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120201674XU Expired - Lifetime CN202127242U (en) | 2011-06-16 | 2011-06-16 | Arc extinction and overvoltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202127242U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125610A (en) * | 2016-07-22 | 2016-11-16 | 安徽亚辉电气自动化有限公司 | A kind of control system of microcomputer ICU |
| CN107342584A (en) * | 2017-07-01 | 2017-11-10 | 合肥东玖电气有限公司 | A kind of system overvoltage restraining device |
-
2011
- 2011-06-16 CN CN201120201674XU patent/CN202127242U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125610A (en) * | 2016-07-22 | 2016-11-16 | 安徽亚辉电气自动化有限公司 | A kind of control system of microcomputer ICU |
| CN107342584A (en) * | 2017-07-01 | 2017-11-10 | 合肥东玖电气有限公司 | A kind of system overvoltage restraining device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201022 Address after: 231100 Shuangfeng Road North 28, Shuangfeng Economic Development Zone, Changfeng County, Hefei, Anhui Patentee after: ANHUI HEKAI ELECTRICAL TECHNOLOGY Co.,Ltd. Address before: Songjiang Jiangtian industrial zone of Shanghai City Road 201613 No. 180 Patentee before: SHANGHAI HEKAI POWER PROTECTION EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120125 |