CN86201707U - Series ceramic condenser - Google Patents
Series ceramic condenser Download PDFInfo
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- CN86201707U CN86201707U CN 86201707 CN86201707U CN86201707U CN 86201707 U CN86201707 U CN 86201707U CN 86201707 CN86201707 CN 86201707 CN 86201707 U CN86201707 U CN 86201707U CN 86201707 U CN86201707 U CN 86201707U
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- dielectric
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- ceramic condenser
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Abstract
The utility model discloses a series ceramic condenser, belonging to the technical field of the condenser. Ceramic dielectric wafers (1) are provided with para-electric ceramics serving as the base material, and the wafers which are connected in series can comprise the new ceramic condenser. The series ceramic condenser is arranged and connected in parallel with a breaker in a distribution wire with 20-50 k v, and the voltage distributed at both ends of the breaker can be improved. The utility model is characterized in that the dielectric loss can be small and can not exceed 4*10+ [-3], the oil dielectric is not used, and the series ceramic condenser has high flashover voltage and can be operated reliably in the atmospheric environment. The utility model has the advantages of rich manufacturing raw material, simple manufacturing process and low cost.
Description
Technical field is a capacitor under the utility model.
In high voltage (20～50 kilovolts) distribution line, certain capacitor in parallel is often wanted at the two ends of vacuum circuit-breaker, distributes with the voltage that improves the circuit breaker cut-off part.At present, adopt oiled paper condenser mostly, but this oiled paper condenser often there is the shortcoming of leakage of oil; Simultaneously, because the growth of running time, the aging disadvantage that dielectric loss rises and puncture voltage descends that makes can take place in oilpaper.Some manufacturing enterprise also has ceramic capacitor and circuit breaker is installed in parallel operation.Made by the barium titanate ferroelectric bulk ceramic but the sort of ceramic capacitor is at present many, dielectric loss is very big, and dielectric loss and capacitance change also very greatly with electric field strength, and performance shortcoming such as instability extremely.In addition, in order to prevent the flashover phenomenon along the ceramic capacitor surface, this ceramic capacitor is by Japanese kokai publication sho 4946197 and United States Patent (USP) 4,363,088 announce must be immersed in the oil can operate as normal, so in the high voltage circuit, fail to be applied.
The utility model works out a kind of tandem ceramic capacitor at the shortcoming of above-mentioned oiled paper condenser and ceramic capacitor.It is made up of paraelectrics pottery; Has epoxy resin enclosedly to be with ' s or to be the clavate insulation system of umbrella.Thereby the shortcoming of fundamentally having got rid of the capacitor leakage of oil increases greatly and has very high flashover voltage along the arcing distance on surface; Low dielectric loss and high stability, can be in atmospheric environment reliability service.
Accompanying drawing one is the tandem ceramic capacitor structure chart that the utility model is developed into.
Accompanying drawing two is relation curves of loss of tandem ceramic capacitor dielectric and power-frequency electric field strength.
Accompanying drawing three is relation curves of tandem ceramic capacitor rate of change of capacitance and power-frequency electric field strength.
(1) is the ceramic dielectric disk in the accompanying drawing one, and (2) are silver electrodes, and (3) are the lead-in wire interfaces, and (4) are connecting screw rods, and (5) are epoxy resin enclosed bodies.
(A) in accompanying drawing two and the accompanying drawing three is the relation curve of barium titanate condenser, (B) is the relation curve of tandem ceramic capacitor described in the utility model.
The ceramic dielectric disk (1) of tandem ceramic capacitor adopts the paraelectrics porcelain to make.Described paraelectrics porcelain, its component are Sr
XBa
1-XTiO
3.Bi
2O
3NTiO
2X=0.2-0.8 in the formula, n=1～3.By said components, take by weighing SrCO
3, BaCO
3, Bi
2O
3And TiO
2Insert and fully mix oven dry in the ball mill, under 1100-1200 ℃ of of of of of of of high temperature pre-burning 1-2 hour, in ball mill, pulverize again, and under 600-1200 kg/cm pressure, be pressed into ceramic dielectric disk (1) by designing requirement, with ceramic dielectric disk (1) surface of making be coated with silver back in 800 degrees centigrade down insulation 15 minutes silver electrode (2), on the surface of silver electrode (2) with soldering or conducting resinl bonding lead-in wire interface (3), 2～6 ceramic dielectric disks (1) are linked into an integrated entity by lead-in wire interface (3) with connecting screw rod (4), after the careful cleaning of acetone, insert and have ' s or be casting epoxy resin encapsulated member (5) in the model of umbrella, promptly make and to obtain 20～50 kilovolts of industrial frequency AC high voltage ceramic capacitors.
The tandem high voltage ceramic capacitor that embodiment described in the utility model is made compares after tested with the barium titanate high voltage ceramic capacitor under the electric field strength of industrial frequency AC 0.75 kvolts/millimeter, and its dielectric loss is respectively 0.2%, 8%; Its electric capacitance change is respectively＜and 2%, 50%(sees accompanying drawing two, accompanying drawing three).Other performances of this tandem high voltage ceramic capacitor see following table for details
Capacitance (PF) 900
Power frequency dielectric loss 14. * 10
-3
The withstand voltage test in one minute of 50 kilovar power frequencies does not have puncture and flashover phenomenon
The 60 kilovar power frequencies withstand voltage test ＂ that boosts continuously
8 hours withstand voltage ＂ of 30 kilovar power frequencies
150 kilovars, 1.2/50 microsecond surge voltage ＂
Positive-negative polarity each three times
30 kilovar power frequencies, aging 1800 hours dielectric losses of electricity and capacitance are constant substantially
Tolerate 20 kilovar power frequencies and discharge and recharge test greater than 104 times
In sum, tandem high voltage ceramic capacitor described in the utility model has and does not have oil, little, the withstand voltage height of dielectric loss, dielectric properties be with the little and high reliability of variable effect of field intensity; Simultaneously, its selected raw material sources are abundant, low price, and manufacturing process is simple, is suitable for a large amount of productions, and good economic benefit is arranged.
Claims (3)
1, a kind of high voltage ceramic capacitor that is parallel to the primary cut-out two ends, it is by ceramic dielectric garden sheet (1), silver electrode (2), lead-in wire interface (3), connecting screw rod (4) and epoxy resin enclosed body (5) are formed, feature of the present invention is: each ceramic dielectric garden sheet (1) is to be made by the paraelectrics pottery, and this ceramic dielectric garden sheet (1) is passed through silver electrode (2) with connecting screw rod (4), seals with epoxy resin enclosed body (5) after lead-in wire interface (3) the series connection assembling.
2, according to the high voltage ceramic capacitor of claim 1, it is characterized in that: the ceramic dielectric garden sheet (1) of series connection assembling can have 2～6.
3, according to claim 1,2 high voltage ceramic capacitor is characterized in that:the profile of epoxy resin enclosed body (5) be band ' s or be the clavate insulation system of umbrella.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201707 CN86201707U (en) | 1986-03-20 | 1986-03-20 | Series ceramic condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86201707 CN86201707U (en) | 1986-03-20 | 1986-03-20 | Series ceramic condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86201707U true CN86201707U (en) | 1988-06-08 |
Family
ID=4805408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86201707 Withdrawn CN86201707U (en) | 1986-03-20 | 1986-03-20 | Series ceramic condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86201707U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477893B (en) * | 2009-01-23 | 2011-02-16 | 华为技术有限公司 | Ceramic capacitor and manufacturing process thereof |
| CN111354571A (en) * | 2018-12-21 | 2020-06-30 | Tdk株式会社 | Capacitor unit |
| CN115440501A (en) * | 2021-06-03 | 2022-12-06 | 河南森源电气股份有限公司 | Voltage-sharing insulating cylinder and voltage-sharing capacitor string thereof |
-
1986
- 1986-03-20 CN CN 86201707 patent/CN86201707U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101477893B (en) * | 2009-01-23 | 2011-02-16 | 华为技术有限公司 | Ceramic capacitor and manufacturing process thereof |
| CN111354571A (en) * | 2018-12-21 | 2020-06-30 | Tdk株式会社 | Capacitor unit |
| CN115440501A (en) * | 2021-06-03 | 2022-12-06 | 河南森源电气股份有限公司 | Voltage-sharing insulating cylinder and voltage-sharing capacitor string thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |