CN211017777U - Arc and harmonic elimination device - Google Patents
Arc and harmonic elimination device Download PDFInfo
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- CN211017777U CN211017777U CN201921919825.8U CN201921919825U CN211017777U CN 211017777 U CN211017777 U CN 211017777U CN 201921919825 U CN201921919825 U CN 201921919825U CN 211017777 U CN211017777 U CN 211017777U
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Abstract
The utility model belongs to the technical field of the power equipment technique and specifically relates to an arc extinction harmonic elimination device is related to, be in including the cabinet body and establish the internal large capacity three-phase combination formula overvoltage protector, high-voltage fuse, voltage transformer, microcomputer controller, high-pressure current limiting fuse, single-phase vacuum contactor and current transformer of cabinet. The utility model relates to an arc extinction harmonic elimination device adopts microcomputer controller and large capacity three-phase combination formula overvoltage protection ware of two CPU controls, when the single-phase arc light ground connection of system emergence, turn into metallicity ground connection with arc light ground connection, thoroughly eliminate arc light ground connection overvoltage, within restricting the electric wire netting overvoltage to the within range that the system allows simultaneously, make 3~35kV neutral point ineffectively grounded electric wire netting both keep the advantage of former system, again with various types of overvoltage restriction to as low as possible level, thoroughly solved various overvoltage to equipment and operation safety's threat, the reliability of this type of electric wire netting power supply has been improved.
Description
Technical Field
The utility model belongs to the technical field of the power equipment technique and specifically relates to an arc extinction harmonic elimination device is related to.
Background
For a long time, the power grids of 3-35 kV systems in China mostly adopt a neutral point ungrounded operation mode, when single-phase grounding occurs to the power grids, the voltage to earth of a non-fault phase is increased to a line voltage, but the line voltage of the system is unchanged and can operate in a fault short time, the power supply reliability of the power grids is improved, but the power supply mode easily generates arc grounding overvoltage and resonance overvoltage when the single-phase grounding current is large, and great harm is caused to power supply equipment. With the development of urban and rural power grids and the requirements of production and life on power supply reliability, the damage and the spread of each insulation accident are increased.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior power grid and developing an arc and harmonic elimination device.
The utility model adopts the technical scheme as follows:
the utility model provides an arc extinction harmonic elimination device, includes the cabinet body and establishes female the arranging of the internal portion of cabinet copper, its characterized in that: isolating switch series connection in female arranging of copper, high capacity three-phase combination formula overvoltage protection ware is parallelly connected on female arranging of copper of isolating switch rear end, high-voltage fuse, voltage transformer and microcomputer controller establish ties back and parallel connection in female arranging of copper of high capacity three-phase combination formula overvoltage protection ware rear side, high-voltage current limiting fuse, single-phase vacuum contactor and current transformer establish ties back and parallel connection on female arranging of copper of high-voltage fuse rear side, microcomputer controller still connect in single-phase vacuum contactor still includes display device and memory, display device and memory connect in microcomputer controller, microcomputer controller be two CPU control, microcomputer controller operating voltage is AC220V or DC220V or DC110V, its consumption < 30W.
Compared with the prior art, the utility model has the advantages that:
the utility model relates to an arc extinction harmonic elimination device adopts microcomputer controller and large capacity three-phase combination formula overvoltage protection ware of two CPU controls, when the single-phase arc light ground connection of system emergence, turn into metallicity ground connection with arc light ground connection, thoroughly eliminate arc light ground connection overvoltage, within restricting the electric wire netting overvoltage to the within range that the system allows simultaneously, make 3~35kV neutral point ineffectively grounded electric wire netting both keep the advantage of former system, again with various types of overvoltage restriction to as low as possible level, thoroughly solved various overvoltage to equipment and operation safety's threat, the reliability of this type of electric wire netting power supply has been improved.
Drawings
Fig. 1 is the principle wiring diagram of the present invention.
Detailed Description
Referring to the attached figure 1, the arc and harmonic elimination device comprises a cabinet body and a copper busbar 1 arranged in the cabinet body, wherein an isolating switch 2 is connected in series with the copper busbar 1, a high-capacity three-phase combined overvoltage protector 3 is connected in parallel with the copper busbar 1 at the rear end of the isolating switch 2, a high-voltage fuse 4, a voltage transformer 5 and a microcomputer controller 6 are connected in series and then connected in parallel with the copper busbar 1 at the rear side of the high-capacity three-phase combined overvoltage protector 3, a high-voltage current limiting fuse 7, a single-phase vacuum contactor 8 and a current transformer 9 are connected in series and then connected in parallel with the copper busbar 1 at the rear side of the high-voltage fuse 4, the voltage transformer 5 and the microcomputer controller 6, the microcomputer controller 6 is also connected to the single-phase vacuum contactor 8, and further comprises a display device and a memory, and the display device and the memory are connected to the microcomputer controller 6.
Preferably, the microcomputer controller 6 is controlled by a dual CPU.
Preferably, the operating voltage of the microcomputer controller 6 is AC220V or DC220V or DC110V, and the power consumption is less than 30W.
The utility model relates to an arc extinction harmonic elimination device, when the system takes place arc light ground connection, the microcomputer control ware 6 control of two CPU controls, single-phase vacuum contactor 8 closes a floodgate fast, converts arc light ground connection into metal type ground connection rapidly, shunts the electric capacity electric current of fault point through high-pressure current limiting fuse 7 and current transformer 9's series circuit simultaneously, further guarantees the reliable extinguishing of electric arc, has improved the reliability of system operation greatly, for the safety of assurance device self and system, the utility model discloses the device has the protection device large capacity three-phase combination formula overvoltage protector 3 and the high-voltage fuse 4 of restriction thunder and lightning overvoltage and operation overvoltage as the back-up protection. When the system is in metallic single-phase grounding, the small-current grounding line selection controller adopts a group ratio amplitude phase method and a current mutation method according to the magnitude of the zero sequence current, so that the accuracy rate of line selection can reach more than 90%.
The utility model discloses thoroughly solved various overvoltage to equipment and operation safety's threat, improved the reliability of this type of electric wire netting power supply.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, so that any person skilled in the art can change or modify the technical content of the above disclosure into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention, unless departing from the contents of the present invention.
Claims (1)
1. The utility model provides an arc extinction harmonic elimination device, includes the cabinet body and establishes female the arranging of the internal portion of cabinet copper, its characterized in that: isolating switch series connection in female arranging of copper, high capacity three-phase combination formula overvoltage protection ware is parallelly connected on female arranging of copper of isolating switch rear end, high-voltage fuse, voltage transformer and microcomputer controller establish ties back and parallel connection in female arranging of copper of high capacity three-phase combination formula overvoltage protection ware rear side, high-voltage current limiting fuse, single-phase vacuum contactor and current transformer establish ties back and parallel connection on female arranging of copper of high-voltage fuse rear side, microcomputer controller still connect in single-phase vacuum contactor still includes display device and memory, display device and memory connect in microcomputer controller, microcomputer controller be two CPU control, microcomputer controller operating voltage is AC220V or DC220V or DC110V, its consumption < 30W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919825.8U CN211017777U (en) | 2019-11-08 | 2019-11-08 | Arc and harmonic elimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919825.8U CN211017777U (en) | 2019-11-08 | 2019-11-08 | Arc and harmonic elimination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211017777U true CN211017777U (en) | 2020-07-14 |
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ID=71480866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921919825.8U Active CN211017777U (en) | 2019-11-08 | 2019-11-08 | Arc and harmonic elimination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211017777U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115167933A (en) * | 2022-09-08 | 2022-10-11 | 深圳市恒运昌真空技术有限公司 | Dual-processor equipment, control method thereof and processor |
-
2019
- 2019-11-08 CN CN201921919825.8U patent/CN211017777U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115167933A (en) * | 2022-09-08 | 2022-10-11 | 深圳市恒运昌真空技术有限公司 | Dual-processor equipment, control method thereof and processor |
| CN115167933B (en) * | 2022-09-08 | 2022-12-02 | 深圳市恒运昌真空技术有限公司 | Dual-processor equipment, control method thereof and processor |
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