CN2783496Y - Combined overvoltage protector with parallel connected gap - Google Patents
Combined overvoltage protector with parallel connected gap Download PDFInfo
- Publication number
- CN2783496Y CN2783496Y CN 200520069408 CN200520069408U CN2783496Y CN 2783496 Y CN2783496 Y CN 2783496Y CN 200520069408 CN200520069408 CN 200520069408 CN 200520069408 U CN200520069408 U CN 200520069408U CN 2783496 Y CN2783496 Y CN 2783496Y
- Authority
- CN
- China
- Prior art keywords
- branch road
- protection branch
- protection
- zinc oxide
- protecting
- 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 claims abstract description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000011787 zinc oxide Substances 0.000 claims abstract description 20
- 230000007935 neutral effect Effects 0.000 claims description 8
- 208000025274 Lightning injury Diseases 0.000 abstract 2
- 239000002131 composite material Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a combined overvoltage protector with parallel gaps, which uses zinc oxide R or a parallel gap F of the Zinc oxide R as a protecting branch. Composite structure with a middle point is composed of a plurality of protecting branches. The protecting branches comprise each phase wire protecting branch which are respectively connected with an A, a B, and a C phases from the middle point, and electrical grounding protecting branches which are connected with ground from the middle point. The utility model is characterized in that the electrical grounding protecting branches and/or each phase wire protecting branch are/is formed into protecting branches RF with parallel gaps, and the protecting branches RF are the zinc oxide R composed of valve sheets R1 and R2 which are arranged in series, and the parallel gaps F are arranged in parallel on the valve sheet R2 of the zinc oxide R. The utility model solves the problem of overhigh residual voltage impacted by large lightning stroke current, causes the residual voltage impacted by the large lightning stroke current to not exceed the insulating value of an appliance, and protects the safe operation of an electric power system.
Description
Technical field:
The utility model relates to overvoltage protection device, more specifically says so to be applied in the electric power system, and with zinc oxide the overvoltage protection device of protection device.
Background technology:
Along with development and national economy, the electric power system scale constantly enlarges, and power equipment is increasing, often has overvoltage to invade electric power system and damages electric equipment.Conventional protection of arrester the electric power system overvoltage relatively of being struck by lightning and producing, but can not protect alternate overvoltage, the overvoltage that happens occasionally infringement electric equipment; Along with the development of technology, be to protect the combination overvoltage protector of branch road to be applied with zinc oxide, effectively limited Lightning Over-voltage and alternate overvoltage.But the residual voltage of zinc oxide under heavy current impact is very high, surpasses apparatus insulated tolerance value generation equipment punch through damage electric equipment.
Summary of the invention:
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of band parallel connection gaps combination overvoltage protector is provided, solve the high residual voltage problem of zinc oxide, improving the safety in utilization of equipment.
The technical scheme that the utility model technical solution problem is adopted is:
The utility model serves as the protection branch road with zinc oxide or with the zinc oxide series gap; constitute the fabricated structure with mid point by many protection branch roads, described many protection branch roads comprise from mid point and connect each phase line protection branch road of A, B, C phase respectively and from the ground protection spur track of neutral earthing.
Design feature of the present utility model is that described ground protection spur track and/or each phase line protection branch road are set to the protection branch road RF with parallel connection gaps; the protection branch road RF of described band parallel connection gaps constitutes described zinc oxide R by valve block R1 and valve block R2 that series connection is provided with, on its valve block R2 parallel connection gaps F is set.
The impulse current that internal overvoltage produces generally can not surpass 5KA; Have only thunder-strike current from several kilo-amperes to kilo-amperes up to a hundred, just can produce very big impulse current.Therefore solve that residual voltage is too high to surpass apparatus insulated value, the heavy current impact residual voltage that solves exactly under the thunderbolt situation is too high, and internal overvoltage can not cause residual voltage too high.
The utility model is in the protection branch road; at partial oxidation zinc valve block parallel connection gaps is set; in case residual voltage surpasses its feasible value; parallel connection gaps forms discharge; this partial oxidation zinc valve block of short circuit; residual voltage value on the protection branch road only depends on the zinc oxide valve plate of remainder, thereby the residual voltage value reduces greatly.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model is simple in structure, effective.
2, the utility model is widely used in the above extra high voltage system of 110KV, 3～66KV medium voltage network, and low-voltage power supply system.
Description of drawings:
Fig. 1 (a) is the utility model structural representation, and Fig. 1 (b) is the isoboles of Fig. 1 (a).
Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) are applied in structural representation in the above extra high voltage system of 110KV for the utility model.
Fig. 3 (a), Fig. 3 (b), Fig. 3 (c) are applied in structural representation in 3～66KV medium voltage network for the utility model.
Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), figure (d), figure (e), Fig. 4 (f) are applied in structural representation in the low-voltage power supply system for the utility model.
Embodiment:
Shown in Fig. 1 (a), the protection branch road RF of band parallel connection gaps is set.
Shown in Fig. 1 (b), concrete structure is to constitute the zinc oxide R that protects in the branch road by valve block R1 and valve block R2 that series connection is provided with, and gap F is arranged in parallel on its valve block R2.Under the normal condition, in the protection branch road, bear operating voltage jointly, leakage current can be limited residual voltage to enough low numerical value by valve block R1 and valve block R2; And run into that the impulsive discharge electric current is excessive, when residual voltage surpasses due protection level, parallel connection gaps F discharge short circuit valve block R2, residual voltage will only be determined by valve block R1.
Embodiment 1: present embodiment is applicable to the extra high voltage system that 110KV is above.
The above extra high voltage system of 110KV is a solidly earthed neutral system, and the sound voltage rise height that powers on mutually is not more than 1.4 times during single-phase earthing, and the relaying protection meeting starts the tripping faulty line; Continue operation unlike system when the single-phase earthing of the non-directly system of neutral point, perfect phase voltage and raise and surpass line voltage.Therefore, there are not continuous operating voltage, 1mA reference voltage, impact the difficult problem that residual voltage is difficult to mate, thus need not on every protection branch road of combination overvoltage protector, to install series gap, to bring into play the advantage of zinc oxide better.
Fig. 2 (a) is applicable to the low area of large lightning current amplitude probability, can reduce cost.This protector has four protection branch roads; each bar protection branch road has the mid point that connects altogether; article four, the protection branch road is respectively: connect each phase line protection branch road of A, B, C phase respectively and from the ground protection spur track of neutral earthing from mid point; for the low area of large lightning current amplitude probability, only need in ground protection spur track, adopt the protection branch road RF4 of band parallel connection gaps.
Fig. 2 (b) and Fig. 2 (c) all are applicable to the high area of large lightning current amplitude probability.In Fig. 2 (b), four protection branch roads all adopt the protection branch road of band parallel connection gaps, comprise RF1, RF2, RF3 and RF4.Be in three phase line protection branch roads, to adopt band parallel connection gaps protection branch road respectively shown in Fig. 2 (c), comprise RF1, RF2 and RF3.
Embodiment 2: present embodiment is applicable to 3～66KV medium voltage network.
For 3～66KV neutral point non-direct grounding system, the insulation of circuit itself is too low, stops direct lightning strike even load onto lightning conducter, often still be difficult to avoid strikeing back, and the effect of reduction Lightning Over-voltage is also not obvious.So adopt neutral point indirect earthing, when taking place, single-phase earthing do not influence the symmetry of three-phase voltage, and system can continue operation.But be that non-fault phase-to-ground voltage can raise more than the line voltage; the continuous operating voltage that is connected to the zinc oxide overvoltage protection device of non-fault phase becomes line voltage by phase voltage; make continuous operating voltage, 1mA reference voltage, impact residual voltage be difficult to coupling; can cause the zinc oxide overvoltage protection device to be difficult to adjust like this; therefore will add series gap F and satisfy and protect requirement in the overvoltage protection branch road, the adding series gap makes that zinc oxide is not charged under the normal condition prolongs the zinc oxide life-span.
Fig. 3 (a) is applicable to the low area of large lightning current amplitude probability, can reduce cost.This protector has four protection branch roads equally, comprises three phase line protection branch roads and a ground protection spur track, for the low area of large lightning current amplitude probability, only need adopt the protection branch road RF4 of band parallel connection gaps in ground protection spur track.
Fig. 3 (b) and Fig. 3 (c) are applicable to the high area of large lightning current amplitude probability.Fig. 3 (b) is the protection branch road that adopts the band parallel connection gaps in four protection branch roads, comprises RF1, RF2, RF3 and RF4; Fig. 3 (c) is the protection branch road that adopts the band parallel connection gaps in three phase line protection branch roads, comprises RF1, RF2 and RF3.
Embodiment 3, and present embodiment is applicable to low-pressure system.
Low-voltage power supply system is the three-phase and four-line electric power system, is the maximum electric pressure of human being's production life contact, also is the electric pressure of non-electricity professional contact, for preventing accident of human electric shock's generation, therefore takes the three-phase and four-line electric power system.Protector has five at the protection branch road of this system, comprises three phase line protection branch roads, a ground protection spur track and a zero connection protection branch road, and wherein, the zero connection protection branch road has identical setting with ground protection spur track.
Structure shown in Fig. 4 (a) and Fig. 4 (d) is applicable to the area saving cost that large lightning current amplitude probability is low; Only adopt protection branch road RF4 and the RF5 that is with parallel connection gaps at ground protection spur track and zero connection protection branch road.
Structure is applicable to the high area of large lightning current amplitude probability shown in Fig. 4 (b), Fig. 4 (c), Fig. 4 (e) and Fig. 4 (f).Perhaps five protection branch roads all adopt the protection branch road of being with parallel connection gaps, comprise RF1, RF2, RF3, RF4 and RF5, perhaps only install parallel connection gaps additional in three phase lines protection branch roads, comprise RF1, RF2 and RF3.
In the present embodiment, each protects branch road can install additional also can not install series gap F additional.
Claims (2)
1; band parallel connection gaps combination overvoltage protector; with zinc oxide (R) or with zinc oxide (R) series gap (F) is the protection branch road; constitute fabricated structure by many protection branch roads with mid point; described many protection branch roads comprise from mid point and meet A respectively; B; each phase line protection branch road of C phase and from the ground protection spur track of neutral earthing; it is characterized in that described ground protection spur track and/or each phase line protection branch road is set to the protection branch road (RF) with parallel connection gaps; the protection branch road (RF) of described band parallel connection gaps is to constitute described zinc oxide (R) by valve block (R1) and valve block (R2) that series connection is provided with, and parallel connection gaps (F) is set on its valve block (R2).
2, band parallel connection gaps combination overvoltage protector according to claim 1 is characterized in that including the zero connection protection branch road from the mid point connecting to neutral in described protection branch road, this zero connection protection branch road has identical setting with ground protection spur track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069408 CN2783496Y (en) | 2005-02-28 | 2005-02-28 | Combined overvoltage protector with parallel connected gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520069408 CN2783496Y (en) | 2005-02-28 | 2005-02-28 | Combined overvoltage protector with parallel connected gap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2783496Y true CN2783496Y (en) | 2006-05-24 |
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ID=36768479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520069408 Expired - Fee Related CN2783496Y (en) | 2005-02-28 | 2005-02-28 | Combined overvoltage protector with parallel connected gap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2783496Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050952A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
| CN106847449A (en) * | 2017-02-20 | 2017-06-13 | 辰硕电子(九江)有限公司 | A kind of high pressure varistor of long-life high reliability |
-
2005
- 2005-02-28 CN CN 200520069408 patent/CN2783496Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103050952A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Bus type large-capacity overvoltage protection device |
| CN106847449A (en) * | 2017-02-20 | 2017-06-13 | 辰硕电子(九江)有限公司 | A kind of high pressure varistor of long-life high reliability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ANHUI HUA KAI POWER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ZHANG YUNYI Effective date: 20070525 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070525 Address after: South Industrial Park in Hefei city of Anhui province Fei 230051 No. 9 Patentee after: Anhui Huakai Electric Net Technology Co., Ltd. Address before: 230022 room 1, building 122, No. 107, Jinzhai Road, Hefei, Anhui Patentee before: Zhang Yunyi |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |