CN201887470U - Overvoltage protector - Google Patents
Overvoltage protector Download PDFInfo
- Publication number
- CN201887470U CN201887470U CN2010206205074U CN201020620507U CN201887470U CN 201887470 U CN201887470 U CN 201887470U CN 2010206205074 U CN2010206205074 U CN 2010206205074U CN 201020620507 U CN201020620507 U CN 201020620507U CN 201887470 U CN201887470 U CN 201887470U
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- oxide valve
- valve plate
- gap body
- gap
- 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
- 230000001012 protector Effects 0.000 title abstract description 5
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 152
- 239000011787 zinc oxide Substances 0.000 claims abstract description 76
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 20
- 229920001971 elastomer Polymers 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 12
- 239000004593 Epoxy Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 5
- 238000007599 discharging Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Thermistors And Varistors (AREA)
Abstract
The utility model relates to an overvoltage protector, which is characterized in that the overvoltage protector comprises four zinc oxide valve plates, one ends of a first zinc oxide valve plate R1, a second zinc oxide valve plate R2 and a third zinc oxide valve plate R3 are respectively connected with an A-phase end, a B-phase end and a C-phase end of protected equipment, the other ends of the first zinc oxide valve plate R1, the second zinc oxide valve plate R2 and the third zinc oxide valve plate R3 are respectively and serially connected with a fourth zinc oxide valve plate R4 through gap bodies DC, the other end of the fourth zinc oxide valve plate R4 is grounded, the four zinc oxide valve plates and the gap bodies DC are respectively and independently sealed, the external parts of the four zinc oxide valve plates and the gap bodies DC are respectively provided with a silicon rubber insulating sleeve in a sheathing way, and the four zinc oxide valve plates and the gap bodies DC are fixedly encapsulated in the silicon rubber insulating sleeves through rubber fasteners. Since a combination structure with the zinc oxide valve plates and discharging gaps, the zinc oxide valve plates and the gap bodies can be protected mutually; and moreover, since the zinc oxide valve plates and the gap bodies are respectively and independently sealed, the situations that the aging of the gap bodies or the zinc oxide valve plates causes the product to be entirely failed and a system is affected can be avoided and the cost is saved.
Description
Technical field
The utility model relates to the overvoltage protection of electric equipment in the electric power system, especially a kind of overvoltage protection device.
Background technology
China nineteen seventies developed three relatively composite type SiC lightning arrester the trend that shields to alternate is arranged, but because the restriction of SiC body resistance performance, self can't normally move, so the alternate protection problem of lightning arrester is undecided always.Perfect along with the ZnO resistive performance, the alternate protection of three phase combined lightning arrester is theoretical is just put on " agenda " from nineteen nineties, and its excellent overvoltage protection performance is familiar with by most of electricity consumption industries.
At present, like product all is placed on gap body and zinc oxide valve plate in the cavity, easily produces that sealing is made moist, the worker is put interference, galvanic corrosion, problem such as aging; In addition, the electrical connecting wires of like product inside is also very complicated.
The utility model content
The purpose of this utility model is to provide a kind of overvoltage protection device that makes moist, wears out of avoiding sealing.
For achieving the above object; a kind of overvoltage protection device provided by the invention; comprise four zinc oxide valve plates; wherein first; two; three zinc oxide valve plate R1; R2; the end of R3 meets the A of protected equipment respectively; B; the C three phase terminals; first; two; three zinc oxide valve plate R1; R2; the other end of R3 is connected with the 4th zinc oxide valve plate R4 by gap body DC respectively; the other end ground connection of the 4th zinc oxide valve plate R4; four zinc oxide valve plates; gap body DC seals independently of one another; described four zinc oxide valve plates; the outer cover of gap body DC is provided with the silicon rubber insulation cover, four zinc oxide valve plates; gap body DC is contained in the silicon rubber insulation cover by rubber securing member fixed sealing.
The utility model adopts zinc oxide valve plate and discharging gap structure combining, both are protected each other, it is zero that discharging gap makes the chargeability of zinc oxide valve plate, zinc oxide valve plate non-linear makes blow-out immediately after the discharging gap action again, discharging gap is no longer born the arc extinguishing task, improved the useful life of product, under the switching overvoltage situation, operating life improves nearly 30 times than no gap oxide lightning arrester; Simultaneously, zinc oxide valve plate and gap body is independent sealed separately, and the aging phenomenon of gap body or zinc oxide can not occur the product overall failure again and jeopardize system, but and the unit safeguard, save cost.
Description of drawings
Fig. 1 is an electrical schematic diagram of the present utility model;
Fig. 2 is the winding diagram that the utility model inserts protected motor;
Fig. 3 is a structural representation of the present utility model;
Fig. 4 is the vertical view of box at the bottom of the epoxy among Fig. 3.
Embodiment
A kind of overvoltage protection device; comprise four zinc oxide valve plates; wherein the end of first, second and third zinc oxide valve plate R1, R2, R3 connects A, B, the C three phase terminals of protected equipment respectively; the other end of first, second and third zinc oxide valve plate R1, R2, R3 is connected with the 4th zinc oxide valve plate R4 by gap body DC respectively; the other end ground connection of the 4th zinc oxide valve plate R4; four zinc oxide valve plates, gap body DC seal independently of one another, shown in Fig. 1,3.
Described gap body DC is made by copper material, comprises into electrode and goes out electrode, advances electrode and is connected with zinc oxide valve plate, goes out electrode and is connected with bolt 50, advances electrode and go out to be provided with the gap between the electrode.Adopt the overvoltage protection device of gap body structure; eliminated the influence of distribution and stray capacitance to discharge performance; solved the bigger difficult problem of gap decentralization that like product is difficult to overcome; the protection value is more accurate; not having the gap overvoltage protection device with routine compares with traditional lightning arrester; alternate overvoltage has reduced by 60%～70%, and the reliability of protection greatly improves.In addition, the voltge surge coefficient in the utility model is 1, and the discharge voltage value all equates under various voltage waveforms, and be not subjected to the influence of various switching overvoltage waveforms, the overvoltage protection value is accurate, and protective value is good.
In conjunction with Fig. 2; the protected equipment of a termination of first, second and third zinc oxide valve plate R1, R2, R3 is the three phase terminals of motor 10; the other end is connected with the 4th zinc oxide valve plate R4 by gap body DC; the other end ground connection of the 4th zinc oxide valve plate R4; this electrical wiring mode is reasonable; be convenient to install, can avoid occurring the worker simultaneously and put phenomenons such as interference, galvanic corrosion.
In conjunction with Fig. 3, the outer cover of described four zinc oxide valve plates, gap body DC is provided with silicon rubber insulation cover 20, that is: it is identical that the outside of the outside of the outside of the outside of the first zinc oxide valve plate R1 and the first gap body DC1, the second zinc oxide valve plate R2 and the second gap body DC2, the 3rd zinc oxide valve plate R3 and third space body DC3, the 4th zinc oxide valve plate R4 is arranged with size, the shape of 20, four silicon rubber insulations covers of silicon rubber insulation cover respectively.Adopt fire-retardant, ageing-resistant silicon rubber to do sheathing material, make that electrical insulation properties of the present utility model is good, dielectric strength is high, anti-galvanic corrosion, ageing-resistant, need not to consider phase spacing and creepage distance, can install flexibly according to field condition.
In conjunction with Fig. 3; 4; described four zinc oxide valve plates; the gap body all is contained in the inside of silicon rubber insulation cover 20 by rubber securing member fixed sealing; first; two; three; four zinc oxide valve plate R1; R2; R3; the termination silicon rubber high-voltage cable 30 of R4; end away from zinc oxide valve plate on the silicon rubber high-voltage cable 30 is equipped with wiring copper nose 40; wherein; high-voltage cable 30 is by wiring copper nose 41; 42; 43 meet the A of protected equipment; B; the C three phase terminals; high-voltage cable 30 is by wiring copper nose 44 ground connection; first; two; three zinc oxide valve plate R1; R2; the other end of R3 by lead respectively with first; two; three gap body DC1; DC2; DC3 connects; first; two; three gap body DC1; DC2; the other end of DC3 is fixed at the bottom of the epoxy on the box 60 by bolt 50; the 4th zinc oxide valve plate R4 directly is fixed at the bottom of the epoxy on the box 60 by bolt 50; first; two; three gap body DC1; DC2; offer the screwed hole that matches with bolt 50 on DC3 and the end that bolt 50 is connected, be connected by copper sheet between the 4th zinc oxide valve plate R4 and the bolt 50.Offer four disks 61 at the bottom of the epoxy on the box 60 successively, disk 61 is made up of three independent fanning strips, the center of disk 61 is provided with the connecting hole 62 that matches with bolt 50, first, second and third gap body DC1, DC2, DC3 and the 4th zinc oxide valve plate R4 are fixed at the bottom of the epoxy on the box 60 by bolt 50 and connecting hole 62 successively, bolt 50 passes connecting hole 62 backs and uses nut screwing clamping, perhaps connecting hole 62 is designed to the screwed hole that matches with bolt 50.
In conjunction with Fig. 3,4, when mounted, zinc oxide assembly and gap body DC fixing seal are overlapped in 20 at silicon rubber insulation, with first, two, three gap body DC1, DC2, DC3 and the 4th zinc oxide valve plate R4 are fixed at the bottom of the epoxy on the box 60 successively, connect silicon rubber high-voltage cable 30, after loading onto wiring copper nose 40, be inverted, high-intensity epoxy resin and curing agent 70 are poured in the cavity that silicon rubber insulation cover 20 and box at the bottom of the epoxy 60 form by the gap between the fanning strip on the disk 61, fill up the gap until epoxy resin and curing agent 70, treat to install after high-intensity epoxy resin and curing agent 70 solidify.Adopt the mode of pouring epoxy resin and curing agent 70 can guarantee that zinc oxide valve plate and gap body DC reach good sealing effectiveness, the while also can increase the intensity of combination overvoltage protector itself, prevents phenomenon such as make moist, wear out better.
In sum; core of the present utility model is to adopt gap body DC structure; and with gap body DC and zinc oxide valve plate is installed separately separately, each other the sealing; to avoid there is cavity around the main body zinc oxide assembly, solved in the prior art the insoluble sealing of gapped type combination overvoltage protector problem such as make moist, wear out.
Claims (6)
1. overvoltage protection device; it is characterized in that: comprise four zinc oxide valve plates; wherein first; two; three zinc oxide valve plate R1; R2; the end of R3 meets the A of protected equipment respectively; B; the C three phase terminals; first; two; three zinc oxide valve plate R1; R2; the other end of R3 is connected with the 4th zinc oxide valve plate R4 by gap body DC respectively; the other end ground connection of the 4th zinc oxide valve plate R4; four zinc oxide valve plates; gap body DC seals independently of one another; described four zinc oxide valve plates; the outer cover of gap body DC is provided with silicon rubber insulation cover (20), four zinc oxide valve plates; gap body DC is contained in the silicon rubber insulation cover (20) by rubber securing member fixed sealing.
2. overvoltage protection device according to claim 1; it is characterized in that: described first; two; three; four zinc oxide valve plate R1; R2; R3; the termination silicon rubber high-voltage cable (30) of R4; the end that silicon rubber high-voltage cable (30) is gone up away from zinc oxide valve plate is provided with wiring copper nose (40); high-voltage cable (30) is by wiring copper nose (41); (42); (43) meet the A of protected equipment; B; the C three phase terminals; high-voltage cable (30) is by wiring copper nose (44) ground connection; first; two; three zinc oxide valve plate R1; R2; the other end of R3 by lead respectively with; two; three gap body DC1; DC2; DC3 connects, the 4th zinc oxide valve plate R4 and first; two; three gap body DC1; DC2; DC3 is fixed at the bottom of the epoxy on the box (60) by bolt (50).
3. overvoltage protection device according to claim 1; it is characterized in that: described gap body DC comprises into electrode and goes out electrode, advances electrode and is connected with zinc oxide valve plate, goes out electrode and is connected with bolt (50); advance electrode and go out electrode gap and cooperate, described gap body DC is made by copper material.
4. overvoltage protection device according to claim 1 is characterized in that: the outside of the outside of the outside of the described first zinc oxide valve plate R1 and the first gap body DC1, the second zinc oxide valve plate R2 and the second gap body DC2, the 3rd zinc oxide valve plate R3 and third space body DC3, the outer cover of the 4th zinc oxide valve plate R4 are provided with silicon rubber insulation cover (20).
5. overvoltage protection device according to claim 2; it is characterized in that: offer four disks (61) on the box at the bottom of the described epoxy (60) successively; disk (61) is made up of three independent fanning strips; the center of disk (61) offers the connecting hole (62) that matches with bolt (50), and first, second and third gap body DC1, DC2, DC3 and the 4th zinc oxide valve plate R4 are fixed at the bottom of the epoxy on the box (60) by bolt (50) and connecting hole (62) successively.
6. overvoltage protection device according to claim 2 is characterized in that: described silicon rubber insulation cover (20) has high-intensity epoxy resin and curing agent (70) with the interior envelope filling of cavity that box (60) at the bottom of the epoxy forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206205074U CN201887470U (en) | 2010-11-24 | 2010-11-24 | Overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206205074U CN201887470U (en) | 2010-11-24 | 2010-11-24 | Overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201887470U true CN201887470U (en) | 2011-06-29 |
Family
ID=44185015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206205074U Expired - Fee Related CN201887470U (en) | 2010-11-24 | 2010-11-24 | Overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201887470U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300524A (en) * | 2014-09-22 | 2015-01-21 | 合肥凯正电气技术有限公司 | Large-capacity overvoltage protection device |
| CN104518685A (en) * | 2014-12-19 | 2015-04-15 | 陈进 | Improvement method for alternating-current motors |
-
2010
- 2010-11-24 CN CN2010206205074U patent/CN201887470U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300524A (en) * | 2014-09-22 | 2015-01-21 | 合肥凯正电气技术有限公司 | Large-capacity overvoltage protection device |
| CN104518685A (en) * | 2014-12-19 | 2015-04-15 | 陈进 | Improvement method for alternating-current motors |
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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: 20110629 Termination date: 20111124 |