CN206099322U - Three -phase combined overvoltage protector - Google Patents
Three -phase combined overvoltage protector Download PDFInfo
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- CN206099322U CN206099322U CN201620853843.0U CN201620853843U CN206099322U CN 206099322 U CN206099322 U CN 206099322U CN 201620853843 U CN201620853843 U CN 201620853843U CN 206099322 U CN206099322 U CN 206099322U
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Abstract
The utility model provides a three -phase combination formula overvoltage protection device, its characterized in that includes constitutional unit and unit on the spot, after being established ties with high voltage resistor by high energy electric capacity, constitutional unit constitutes parallelly connected the series connection with zinc oxide nonlinear resistor again with discharge gap earlier, establish ties with zinc oxide nonlinear resistor again after the unit is connected in parallel by discharge gap and high voltage resistor on the spot and constitute three groups constitutional unit makes up with four star connection with a set of unit on the spot. The utility model discloses a three -phase combination formula overvoltage protection device, its beneficial effect make alternately and look at and appraise the ground excessive pressure and all receive the protection.
Description
Technical field
The utility model is related to a kind of overvoltage protector for being applied to electricity supplying and using system, and specifically a kind of three is combined
Formula overvoltage protector.
Background technology
Overvoltage protection device is mainly used in 3-35 kilovolts power plant, transformer station and other all kinds of electricity supplying and using systems, to motor,
Atmospheric over-voltage suffered by all kinds of electrical equipments such as transformer, switch, bus, operated to the alternate and phase that switch switching causes
Voltage plays restriction effect, and protection electric equipment insulation is without prejudice；Electric power is widely portable to, metallurgical, chemical industry, coal, stone
The overvoltage protection of electrical equipment in the industries such as oil, light industry.Vacuum is widely used in the electrical power trans mission/distribution system of middle pressure grade to open
Close, because its quick action, arcing are little, high overvoltage and surge energy can be caused in operation moment, if from high-pressure type
Resistance is protected by (such as arrester), although its voltage gradient is high, cost is relatively low, but energy capacity is little, is easily damaged；
If from high energy type resistance, although its energy capacity is big, lasts a long time, but voltage gradient is low, and cost is too high, is the former
5～13 times.High-pressure type piezo-resistance being selected now either single-phase or combination overvoltage protection device more.So to outside
Overvoltage plays restriction effect, and to most of internal overvoltage effect is not had.It is either single-phase in existing overvoltage protection device
Or selecting high-pressure type piezo-resistance combination overvoltage protection device more.The energy capacity of general Zinc-oxide piezoresistor only has 120J-
150J/cm 3, with one milliampere nominal voltage is taken.Energy capacity is up to 500J/cm more than 3, quality oxide zinc nonlinear resistance
Energy capacity takes nominal voltage up to 500J/cm more than 3 with 10 milliamperes.High-tension resistive, its advantage be voltage gradient it is high,
Large current characteristic is good but only has preferable protective capacities to the over-pressed and surge of narrow spaces, and energy density is less；Quality oxide zinc
Nonlinear resistance, its advantage is that energy density is larger, bears long pulsewidth surge capacity by force, but voltage gradient is relatively low, high current
Characteristic is poor.
Utility model content
In order to realize protective effect to device external overvoltage and internal overvoltage, the utility model utilizes zinc oxide
Nonlinear resistance provides a kind of three phase combined over-voltage protector with the electrical characteristic of high-voltage resistor.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of three phase combined over-voltage protector, it is characterised in that including construction unit and local unit, the structure
Unit is first in parallel with discharging gap after being connected with high-voltage resistor by high-energy capacitor to be composed in series again with znr,
The local unit by discharging gap it is in parallel with high-voltage resistor after be composed in series with znr again, described in three groups
Construction unit is combined with one group of local unit with four star connections.
Preferably, the construction unit makees overcoat using silicon rubber.
A kind of three phase combined over-voltage protector of the present utility model, its advantage makes alternate and phase ground overvoltage receive
To protection.
Description of the drawings
A kind of fundamental diagram of three phase combined over-voltage protector that Fig. 1 is provided for the utility model.
Wherein, 1- construction units, 2- local units, 3- parallel resistances gap FR is znr, and R is high pressure
Resistor, C1 is discharging gap, and C2 is high-energy capacitor, and A, B, C connect three-phase, and D is ground connection.
Specific embodiment
To make to have a better understanding and awareness architectural feature of the present utility model and the effect reached, to compared with
Good embodiment and accompanying drawing coordinates detailed description, is described as follows：
A kind of three phase combined over-voltage protector, it is characterised in that including construction unit 1 and local unit 2, the knot
Structure unit 2 after being connected with high-voltage resistor R by high-energy capacitor C2 it is first in parallel with discharging gap C1 again with znr
FR is composed in series, the local unit by discharging gap C1 it is in parallel with high-voltage resistor R after again with znr FR
It is composed in series, construction unit 1 described in three groups is combined with one group of local unit 2 with four star connections.
Preferably, the construction unit makees overcoat using silicon rubber.
The present embodiment is implemented, and construction unit is using znr and parallel resistance gap series shape
Formula so that the extinguishing voltage of overvoltage protection device is high, steep wave impact coefficient is little, discharging gap parallel high voltage resistor, high-tension electricity
Resistance device and znr, make power-frequency sparkover voltage dispersiveness little, and work puts stable, and the control of steep wave impact coefficient has
Beneficial to the alternate protection of electric rotating machine, using four star connections, alternate and phase ground overvoltage is set to be protected,
ZnO resistors have excellent C-V characteristic again with parallel resistance gap series so that protector performance is steady
Fixed, through-current capacity is big, and residual voltage is low, and using silicon rubber overcoat is made, in addition to the electrical characteristic with common porcelain bushing type, also with insulating properties
The features such as good dielectric strength is high.
General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply principle of the present utility model, the utility model also has respectively on the premise of without departing from the utility model spirit and scope
Changes and improvements are planted, these changes and improvements are both fallen within the range of claimed the utility model.The utility model is required
Protection domain defined by appending claims and its equivalent.
Claims (2)
1. a kind of three phase combined over-voltage protector, it is characterised in that：Including construction unit and local unit, the structure list
Unit is first in parallel with discharging gap after being connected with high-voltage resistor by high-energy capacitor to be composed in series again with znr, institute
State local unit by discharging gap it is in parallel with high-voltage resistor after be composed in series with znr again, described in three groups tie
Structure unit is combined with one group of local unit with four star connections.
2. a kind of three phase combined over-voltage protector according to claim 1, it is characterised in that：The construction unit makes
Make overcoat with silicon rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620853843.0U CN206099322U (en) | 2016-08-09 | 2016-08-09 | Three -phase combined overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620853843.0U CN206099322U (en) | 2016-08-09 | 2016-08-09 | Three -phase combined overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099322U true CN206099322U (en) | 2017-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620853843.0U Active CN206099322U (en) | 2016-08-09 | 2016-08-09 | Three -phase combined overvoltage protector |
Country Status (1)
| Country | Link |
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| CN (1) | CN206099322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290624A (en) * | 2017-06-19 | 2017-10-24 | 武汉理工大学 | A kind of three-phase distribution circuit model suitable for non-effective earthing power distribution network |
-
2016
- 2016-08-09 CN CN201620853843.0U patent/CN206099322U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290624A (en) * | 2017-06-19 | 2017-10-24 | 武汉理工大学 | A kind of three-phase distribution circuit model suitable for non-effective earthing power distribution network |
| CN107290624B (en) * | 2017-06-19 | 2019-12-31 | 武汉理工大学 | Three-phase distribution line model suitable for non-effective ground connection distribution network |
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