CN2593440Y - Overvoltage protection apparatus - Google Patents
Overvoltage protection apparatus Download PDFInfo
- Publication number
- CN2593440Y CN2593440Y CN 03232771 CN03232771U CN2593440Y CN 2593440 Y CN2593440 Y CN 2593440Y CN 03232771 CN03232771 CN 03232771 CN 03232771 U CN03232771 U CN 03232771U CN 2593440 Y CN2593440 Y CN 2593440Y
- Authority
- CN
- China
- Prior art keywords
- overvoltage protection
- overvoltage
- gap
- capacitor
- series
- 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 - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract description 10
- 239000011787 zinc oxide Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007935 neutral effect Effects 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
本实用新型公开了一种过电压保护装置，它是一种涉及电力系统电气设备的新型组合式过电压保护装置。该装置包括接成四星型的四个支路，其中一端接于A、B、C相线的支路由电容器与电阻串联后与氧化锌非线性电阻并联，最后再与间隙串联，一端接于地线的第四支路则由电容器与氧化锌非线性电阻并联后再与间隙串联，四条支路的另一端则接在一起。本实用新型适用于35KV、10KV、6KV中性点不接地系统，对电力系统电气设备的过电压保护，具有很好的过电压保护效果，具有极高的实用性和推广使用价值。
The utility model discloses an overvoltage protection device, which is a novel combined overvoltage protection device related to electrical equipment in a power system. The device consists of four branches connected in a four-star shape, one end of which is connected to the A, B, and C phase lines. The capacitor is connected in series with the resistor, then connected in parallel with the zinc oxide non-linear resistor, and finally connected in series with the gap, and one end is connected to the The fourth branch of the ground wire is connected in parallel with the capacitor and the zinc oxide non-linear resistor and then connected in series with the gap, and the other ends of the four branches are connected together. The utility model is suitable for 35KV, 10KV, and 6KV neutral point non-grounding systems, and has good overvoltage protection effect on the overvoltage protection of electrical equipment in the power system, and has extremely high practicability and popularization and use value.
Description
Technical field
The utility model is a kind of novel combination type overvoltage protection that relates to the electric power system electric equipment.
Background technology
According to the Technological Economy of electric equipment and electric pressure, the insulation of high voltage electric apparatus (as power distribution equipment, transformer, motor etc.) all has certain limit.For avoiding the harm of atmospheric over-voltage and switching overvoltage to these equipment, in the prior art, have and adopt the band (seeing accompanying drawing 1) and the zinc oxide arrester device of the four stars type wiring of band gap not, employing RC capacitance-resistance absorption plant is also arranged.Have certain effect to a certain extent with in the certain limit to preventing overvoltage though the former shortcoming is it, because self electrical characteristic of znr, it is slower to high frequency overvoltage signal response speed.When switching overvoltage or other overvoltage take place, can not reduce the rising steepness of frequency of oscillation and overvoltage wave head, can not damping and decay overvoltage oscillations.In addition, the wave head of high frequency and high steepness also has harmful effect to zinc oxide arrester itself, thereby has caused frequent the electric equipment particularly damage of motor windings turn-to-turn insulation and the damage of zinc oxide arrester protective device self.Though and the latter's shortcoming be it to prevent overvoltage to a certain extent with have certain effect in the certain limit, but because self-characteristic can not be reduced to overvoltage a definite level, the overvoltage energy that can not release big rapidly, but come oscillatory extinction to fall the overvoltage wave energy by the equivalent resistance of resistance and system, thereby caused the particularly damage of motor windings turn-to-turn insulation of frequent electric equipment, RC capacitance-resistance absorption plant has also taken place often can not bear in some cases than the overvoltage of macro-energy and impact and the accident of blast.
Summary of the invention
The purpose of the utility model device is to provide a kind of novel combination type overvoltage protection device, to overcome the insurmountable difficult problem of above-mentioned prior art.
For achieving the above object, the technical solution that the utility model device is provided is in parallel with the znr valve block after capacitor is connected with resistance, connects with the gap, thereby constitutes a standard branch.The 4th branch road then by capacitor be composed in series with the gap again after znr is in parallel.And then be connected into the four stars type by three standard branches and the 4th branch road, and promptly one of three standard branches being terminated at A, B, C phase line, the 4th branch road one is terminated at ground wire G, and the other end of four branch roads is connected together, and forms a mid point.
After system or electric equipment adopt this device,, efficiently solve the Over-voltage Protection of electric equipment according to its mode of connection and operation principle.When switching overvoltage or the generation of other overvoltage, gap breakdown.After the puncture; RC loop and znr valve block insert oscillation circuit immediately simultaneously; effectively reduce frequency of oscillation and overvoltage wave head rising steepness; protected the turn-to-turn insulation of electric equipment; the also effectively damping and the superpotential vibration that decayed; rapidly the overvoltage amplitude is lowered and be limited in certain voltage levvl (because this device has clear and definite residual voltage value; also clear and definite this protective device is to superpotential protective capability), also can rapidly big overvoltage energy be released by the znr with big discharge capacity.In addition because gapped; under situations such as normal or single-phase earthing; the gap effectively isolates protection component and system; the chargeability that makes znr is zero; also make capacitor not be subjected to influence of harmonic in the electrical network; prolonged the life-span of device, capacitor under normal circumstances can not provide capacitance current to system yet.RC loop and znr in the device also play a part mutual protection.Because this device has also adopted the four stars type mode of connection, has effectively protected relatively to reach alternate overvoltage.
Description of drawings
Fig. 1 is the mode of connection of lightning arrester in the prior art.
Fig. 2 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Referring to accompanying drawing 1,2, number in the figure: CG1, CG2, CG3, CG4 are the gap, and FR1, FR2, FR3, FR4 are znr, and C1, C2, C3, C4 are capacitor, and R1, R2, R3 are resistance.A, B, C are phase line, and G is a ground wire.
Referring to accompanying drawing 2, C1 connects with R1 (C2 and R2, C3 and R3), and is in parallel with FR1 (FR2, FR3) again, connects with CG1 (CG2, CG3) again, forms a standard branch.C4 is in parallel with FR4, connects with CG4 again, forms the 4th branch road.One end of three standard branches is connected with A, B, C phase line respectively, and an end of the 4th branch road links to each other with ground wire, and the other end of four branch roads links together, and forms a mid point.Its feature be with the RC capacitance-resistance absorb with znr effective in parallel after, again by a gap access electrical network.RC loop and znr in the device also play a part mutual protection.Because this device has also adopted the four stars type mode of connection, has effectively protected relatively to reach alternate overvoltage.
The utility model is applicable to 35KV, 10KV, 6KV isolated neutral system.
Claims (1)
1. overvoltage protection, this device comprises four branch roads that are connected into the four stars type, it is characterized in that wherein a route capacitor that is terminated at A, B, C phase line connects afterwards in parallelly with znr with resistance, connects with the gap more at last; One the 4th branch road that is terminated at ground wire is then connected with the gap by after capacitor and the znr parallel connection again; Article four, the other end of branch road then is connected together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03232771 CN2593440Y (en) | 2003-01-09 | 2003-01-09 | Overvoltage protection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03232771 CN2593440Y (en) | 2003-01-09 | 2003-01-09 | Overvoltage protection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2593440Y true CN2593440Y (en) | 2003-12-17 |
Family
ID=33757768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03232771 Expired - Lifetime CN2593440Y (en) | 2003-01-09 | 2003-01-09 | Overvoltage protection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2593440Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868286A (en) * | 2012-09-19 | 2013-01-09 | 原平市兴胜机械制造有限公司 | Device for absorbing spike voltage at output end of frequency converter |
| CN106655143A (en) * | 2016-11-16 | 2017-05-10 | 合肥普望电子有限责任公司 | Three-phase combined overvoltage protector |
| CN110474314A (en) * | 2019-09-03 | 2019-11-19 | 国家电网有限公司 | A kind of shunt capacitor overvoltage absorbing device |
-
2003
- 2003-01-09 CN CN 03232771 patent/CN2593440Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868286A (en) * | 2012-09-19 | 2013-01-09 | 原平市兴胜机械制造有限公司 | Device for absorbing spike voltage at output end of frequency converter |
| CN106655143A (en) * | 2016-11-16 | 2017-05-10 | 合肥普望电子有限责任公司 | Three-phase combined overvoltage protector |
| CN110474314A (en) * | 2019-09-03 | 2019-11-19 | 国家电网有限公司 | A kind of shunt capacitor overvoltage absorbing device |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130109 Granted publication date: 20031217 |