CN101814347B - Insulating sleeve for oil filling - Google Patents
Insulating sleeve for oil filling Download PDFInfo
- Publication number
- CN101814347B CN101814347B CN2010101135582A CN201010113558A CN101814347B CN 101814347 B CN101814347 B CN 101814347B CN 2010101135582 A CN2010101135582 A CN 2010101135582A CN 201010113558 A CN201010113558 A CN 201010113558A CN 101814347 B CN101814347 B CN 101814347B
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- center conductor
- insulating sleeve
- conductor
- trunk
- oil
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Abstract
This invention provides an insulating sleeve adopting a centre conductor that is made of aluminium alloy with excellent mechanical strength and low cost, at the same time, avoiding the problem of the contact resistance between the end part of the centre conductor and the jointing part of other energized terminals being increased due to the oxide layer generated on the surface of the aluminium alloy. Said insulating sleeve for oil filling includes: a porcelain sleeve in gas side, a porcelain sleeve in oil side, and an insulating sleeve body located between two porcelain sleeves for installing metal flange attachment, a centre conductor coming through said insulating sleeve body, a metal piece under the down end of said insulating sleeve being screwed with the centre conductor for connecting with the energized terminals. Where, said centre conductor includes: a centre conductor trunk covered by the oil filling insulating sleeve in full length, a top conductor at upper end of the high voltage side of said centre conductor trunk being screw by thread for connecting with the energized terminals. Said top conductor for connecting with the energized terminals and bellow metal piece for connecting with the energized terminals are made of Cu or Cu series metal. Said centre conductor trunk is made of aluminium alloy components.
Description
Technical field
The present invention relates to oil insulator.
Background technology
The insulating sleeve of supporting high-voltage power line etc. of being used to insulate is provided with the insulator of porcelain between ground connection side metalwork and high-pressure side metalwork; Its structure does; When heart portion connects center conductor therein, enclose insulating gas or insulating oil to guarantee insulating properties in inside.
Fig. 1 shows that the application's applicant is disclosed, inclosure has the cross-sectional illustration figure (patent documentation 1) of insulating oil with the insulating sleeve of the center of guaranteeing insulating properties fastening (セ Application タ one Network ラ Application プ, center clamp) structure in inside.Among Fig. 1,1 is the gas side insulator, and 2 is oily side insulator, and 3 for to be positioned at these central mounting flange metal-wares, and 4 is center conductor, and 5 is the oil-paper condenser core of center conductor 4 peripheries.Be filled with insulating oil 6 in the inside of insulating sleeve body.7 is the expanding chamber of insulating sleeve head, applies tension force through the center of the portion of setting within it is fastening with 8 pairs of center conductors 4 of spring, becomes the center fastening structure that gas side insulator 1, oily side insulator 2 and mounting flange metal-ware 3 etc. are combined closely.Upper end at center conductor 4 connects top terminal 9, and the lower end connects terminal in the oil, switches on.
Here, the material requirement to center conductor 4 is to have suitable conductance and mechanical strength.From two such viewpoints, generally adopt copper or aluminum or aluminum alloy as the industrial materials of center conductor 4.Special in the big insulating sleeve of rated current, the preferred copper center conductor that adopts with high conductivity.And on the other hand, in the insulating sleeve of special demands mechanical strength, preferably adopt the center conductor of aluminium alloy system.Further, generally be preferably aluminium alloy system from the viewpoint of economy.
But, do not destroy its inner insulation thereby insulating sleeve need be suppressed at the electric potential gradient of inside suitable value.Insulating sleeve for the high grade of electric pressure is controlled in the suitable scope for the electric potential gradient with the center conductor surface, and the diameter of center conductor needs rugosity to a certain degree.If the increasing center conductor diameter can automatically increase the electric current energising ability that flows through it.But generally great majority are not need so high energising specified in the high insulating sleeve of electric pressure, from the viewpoint of electric current energising ability, not only use copper, and much use aluminium alloy.
If comprehensive above-mentioned viewpoint is not only used copper from the viewpoint of electric current energising ability, and much used aluminium alloy,, we can say that therefore the advantage of center conductor of the aluminium alloy system of employing is many further because the intensity of aluminium alloy is high, and price is also cheap.
But aluminium alloy forms the such character of oxide-film owing to having in the very short time on the surface, after grinding aluminum alloy surface, at once, begins oxidation rapidly, forms the oxide-film that approaches.This oxide-film partly is the thinness that can not see degree with eyes, though also have energising property, contact resistance uprises, and reaches the state that can not adapt to big electric current energising.
If the end of the center conductor 4 of the aluminium alloy system of state and other terminal 9,10 join and begin energising like this; The increase slowly of the oxide thickness of aluminium alloy face; Become the visual albefaction film that can know; Contact resistance is increased, produce high temperature, the danger that will cause fire is soon arranged.Should danger in order to avoid, be necessary to carry out particular processing with respect to the connecting portion of the end of the center conductor 4 of the above-mentioned aluminium alloy system of joining with other terminal 9,10.After this processing is the above-mentioned connecting portion of center conductor of meticulous grinding aluminium alloy system; Be not coated with to careless omission thin special anti-oxidation grease immediately equably; The other side's terminal that closes rapidly then carries out fastening, afterwards, and further with making moisture or oxygen not get into this connecting portion around the gap filler sealing.If this surface treatment operations is incomplete, will cause fire incident, therefore, require complete operation.But; This operation is owing to be to need skilled operation; Therefore, the operator need carry out sufficient educational practice in advance, owing to can not often guarantee experienced operators; The angle that the danger of the fire incident that oxide-film causes that is formed by the above-mentioned connecting portion at aluminium alloy system center conductor is avoided is set out, and is problematic.In addition; Particularly high-pressure side, the top terminal of center conductor 4 and top terminal 9 is connected owing to be that attended operation with lead has relation; Having much is that carry out at scene in electric substation, and the such problem of above-mentioned processing quality management that is difficult to carry out completely connecting portion is arranged.
In addition, it is low that the center conductor of aluminium alloy system and center conductor made of copper are compared fusing point, when having temperature to rise, and the rate of descent of the mechanical strength significant tendency that becomes.Therefore; Even do not reach the situation of the high temperature that above-mentioned such fire incident takes place; When high temperature (above 200 ℃) to a certain degree; Because of the mechanical load that above-mentioned connecting portion produced of aluminium alloy system center conductor, mechanically destruction center's conductor has the problem that causes the such danger of the accident of having a power failure on a large scale.
Patent documentation 1: japanese kokai publication hei 10-52314 communique
Summary of the invention
The object of the present invention is to provide and a kind ofly can avoid the technology that becomes the overheat accident of problem when adopting aluminium alloy system center conductor with mechanical strength height and the such advantage of low price.Concrete provide a kind of and can avoid the insulating sleeve of problem of contact resistance increase that the oxide-film that forms in aluminum alloy surface makes end and the connecting portion of other energising terminal of aluminium alloy system center conductor.
For solving the oil insulator of the present invention that above-mentioned problem is accomplished; It is characterized in that; The center conductor that this oil insulator has the insulating sleeve body, connect this insulating sleeve body is used the lower metal part with being connected with energising terminal that center conductor is screwed by screw thread in the bottom of this insulating sleeve body; Wherein, Said insulating sleeve body comprises gas side insulator, oily side insulator and the mounting flange metal-ware between two insulators of gas side insulator and oily side insulator; This center conductor comprises that covering the center conductor trunk of total length by oil insulator is connected with energising terminal that upper end, high-pressure side at this center conductor trunk is screwed by screw thread and uses top conductor; It is that metal parts constitutes by copper or copper that this energising terminal connection is connected with the lower metal part with top conductor with the energising terminal, and this center conductor trunk is made up of aluminium alloy part.
Technical scheme 3 described inventions; It is characterized in that; In technical scheme 1 or 2 described oil insulators, has the center fastening structure that the screw thread portion of screwing that screw thread for the bottom that is positioned at center conductor screws the upper end, high-pressure side of portion and center conductor trunk applies tensile stress.
The present invention is through such structure; Promptly the center conductor trunk by aluminium alloy system is that metal energising terminal is connected the center conductor that constitutes insulating sleeve with top conductor with copper or copper; Further having copper or copper in the bottom of this insulating sleeve body is that the lower metal part is used in metal energising terminal connection; Kept the characteristic of mechanical strength than the center conductor of the more excellent such aluminium alloy system of copper; Simultaneously, can avoid the problem that forms oxide-film at the aluminium alloy system center conductor and the connecting portion of energising splicing ear.Promptly; The present invention is metal parts through the connecting portion with the energising splicing ear for copper or the copper that does not produce oxide-film formation problem; Can be without masterful technique or the such means of quality management completely; Just can prevent to form with the oxide-film of center conductor with the connecting portion of energising terminal, avoiding thing followed contact resistance increases and overheat accident, significantly improves insulating sleeve attended operation property.
According to technical scheme 2 described inventions; Make the upper end, high-pressure side of center conductor trunk is connected the connecting portion that screws with the top conductor screw thread under the pasta of the insulating oil that is filled in oil insulator inside with the energising terminal; Through having such structure; Can emit the Joule heat that screw thread screws portion expeditiously, suppress the overheated of this part effectively.In addition, through making this connecting portion in insulating oil, can effectively avoid following problem: the center conductor trunk side in aluminium alloy system forms oxide-film, increases contact resistance and incident overheat accident.
According to technical scheme 3 described inventions; The screw thread portion of screwing that screws the upper end, high-pressure side of portion and center conductor trunk for the screw thread of the bottom that is positioned at center conductor applies tension force; Through having such center fastening structure, can reduce the contact resistance that screw thread screws portion by the center fastening force.Through reducing the contact resistance that screw thread screws portion, even the short circuit current through being produced by short circuit accident also can suppress the temperature rising that this screw thread screws portion.Thus, by technical scheme 3 described inventions,, also can effectively avoid by screw thread screwing the overheated of portion and the problem of the reduction of the mechanical strength that causes is incident fusing accident even adopt the situation of low-melting aluminium alloy system center conductor.
Description of drawings
Fig. 1 is the cross-sectional illustration figure of oil insulator in the past.
Fig. 2 is the cross-sectional illustration figure of oil insulator of the present invention.
Fig. 3 is that the center conductor trunk of Fig. 2 is connected the expansion key diagram that screws connecting portion with the screw thread of top conductor with the energising terminal.
Fig. 4 is that the center conductor trunk of Fig. 2 is connected the expansion key diagram that screws connecting portion with the screw thread of lower metal part with the energising terminal.
Fig. 5 is the cross-sectional illustration figure of the oil insulator of the present invention of other execution mode.
Fig. 6 is that the center conductor trunk of Fig. 5 is connected the expansion key diagram that screws connecting portion with the screw thread of top conductor with the energising terminal.
Symbol description
1 gas side insulator,
2 oily side insulators
3 mounting flange metal-wares
4 center conductors
41 center conductor trunks
The 41a bolt part
The 41b bolt part
The 41c screw thread screws portion
The 41d screw thread screws portion
41e is to head piece
42 energising terminals connect uses top conductor
The 42a bolt part
The 42b bolt part
42c digs portion
42d is to discharge orifice
43 energising terminals connect uses the lower metal part
5 oil-paper capacitor cores
6 insulating oils
7 expanding chambers
8 springs
9 top terminal
Terminal in 10 oil
11 nitrogen spaces
12 lids
13 binding nuts
14 tube connectors
14a upper bolt portion
14b lower bolt portion
14c is to discharge orifice
Embodiment
Below, show preferred implementation of the present invention.
Fig. 2 shows the cross-sectional illustration figure of oil insulator of the present invention.Among Fig. 2; 1 is the gas side insulated tube, and 2 is oily side insulator, and 3 for being positioned at these central mounting flange metal-wares; 41 is the center conductor trunk; 42 is that top conductor is used in the connection of energising terminal, and 43 is that the lower metal part is used in the connection of energising terminal, and 5 is the oil-paper capacitor core of center conductor trunk 41 peripheries.The inside of insulating sleeve body is filled with insulating oil 6.7 is the expanding chamber of insulating sleeve head; Through fastening the connection with top conductor 42 and center conductor trunk 41 of the center of portion's setting within it applying tension force, be the fastening structure in center of the gas side insulator 1 of combining closely, oily side insulator 2 and mounting flange metal-ware 3 etc. with 8 pairs of energisings of spring terminal.The upper end that connects with top conductor 42 at the energising terminal connects top terminal 9, and the energising terminal connects with lower end metalwork 43 and connects terminal 10 in the oil, switches on.
At the oil-paper capacitor core 5 of reeling on every side of center conductor trunk 41, on one side it guarantees the insulation of center conductor trunk 41 and mounting flange 3, Yi Bian control gaseous side insulator 1 becomes even with making along the face electric field of oily side insulator 2.In the slit of oil-paper capacitor core 5 and above-mentioned insulator 1,2, be full of insulating oil 6.The pasta of insulating oil 6 will arrive in the expanding chamber 7 always, and the top of pasta is nitrogen space 11.This nitrogen space 11 has as the variations in temperature that is accompanied by insulating oil 6, when carrying out thermal expansion, absorbs the effect of its cushion.Seal with lid 12 on the top in nitrogen space 11, and seal between the outside.In expanding chamber 7, there is the center fastening, is combined on the energising terminal and connects binding nut 13 compressions with the 42a of upper bolt portion of top conductor 42 with spring 8.This compression stress is the upper surface of pushing gas side insulator 1 with through the bottom surface of expanding chamber 7, simultaneously, draws through center conductor trunk 41 and to carry the energising terminal and connect and to carry out work with the mode of lower metal part 43, the lower surface that pushes away oily insulator 2 on further.Its result makes gas insulator 1 be clamped in the lower surface of expanding chamber 7 and the upper surface of mounting flange 3 through this compression stress, and oily insulator 2 is clamped in the energising terminal and connects with the upper surface of lower metal part 43 and the lower surface of mounting flange 3.Bear compression stress like this through two insulators and be held,, stably keep insulating sleeve as assembling structural body by the frictional force of this part.Interface between each parts is by the gasket seal clamping, becomes inner insulating oil not to the structure of external leakage.
Fig. 3 display centre conductor trunk 41 is connected the expansion key diagram that screws connecting portion with the screw thread of top conductor 42 with the energising terminal.The material of center conductor trunk 41 is an aluminium alloy, and it is metal as copper or copper that the material of top conductor 42 is used in the connection of energising terminal.Center conductor trunk 41 in this execution mode be shaped as tubulose.Also can be for bar-shaped.Inner face at an upper portion thereof cuts out bolt part (recess) 41a.Center conductor trunk 41 does not extend to the top of insulating sleeve; Have screw thread on the way and screw the 41c of portion, screw thread screws the 41c of portion and will connect bolt part 42b (protuberance) with top conductor 42 incisions at energising terminal made of copper and screw with above-mentioned bolt part (recess) 41a screw thread and be connected.
Fig. 4 display centre conductor trunk 41 is connected the expansion key diagram that screws connecting portion with the screw thread of lower metal part 43 with the energising terminal.Following end-grain cutting at center conductor trunk 41 has bolt part (recess) 41b, connects to have with the bolt part (protuberance) of lower metal part 43 incisions and above-mentioned bolt part (recess) 41b at the energising terminal to screw the screw thread that is connected by screw thread and screw the 41d of portion.The material employing bronze or the copper such as the brass or the casting in bronze divine force that created the universe that connect with lower metal part 43 as the energising terminal are metal.
As Fig. 3, the bottom at center conductor trunk 41 shown in Figure 4 be provided with discharge orifice 41e connected inside and outside.In addition, the bottom setting that connects with top conductor 42 at the energising terminal digs the 42c of portion.Level fragrance connects discharge orifice 42d to the outside from its inside.Through these to discharge orifice 41e and 42d, insulating oil 6 can come in and go out center conductor trunk 41 inside and outside.The Joule heat that in center conductor trunk 41, produces during energising is passed to the oil of center conductor trunk 41 inboards, and this oil is owing to thermal expansion lightens, flows into the top, through discharge orifice 42d is flowed to the outside.Then, under the lateral through oil-paper capacitor core 5, from discharge orifice 41e being got into once more the inside of center conductor trunk 41.Through such backflow, the heat of generation is discharged into the outside effectively.Through the tubulose that is shaped as of center conductor trunk 41, can obtain by the caused exothermal effect of such convection current.
In addition, it is as shown in Figure 2 owing to be disposed at the position that in oil insulator, covers total length to constitute center conductor trunk of the present invention 41, and therefore, center conductor trunk 41 is not exposed in the outer gas.Screw thread screws the 41c of portion, 41d is configured in the insulating oil 6, can not be exposed in the nitrogen in nitrogen space 11.Have the air of sneaking in the insulating sleeve assembling in this nitrogen space 11, the mixed possibility of depositing of the air of perhaps sneaking into through the gasket seal between the sealing article is also high.In this case; Screw thread screws the 41c of portion, 41d is exposed in this airborne oxygen; Though the problem that screws the 41c of portion, the last formation of 41d oxide-film at screw thread is arranged; But by the present invention, the bolt part of center conductor trunk 41 (recess) 41a, 41b since contact with oxygen not can not carry out oxide-film in this part and form.Therefore; Behind bolt part (recess) 41a through grinding center conductor trunk 41 completely in the factory in quality management, the 41b; Before oxide-film forms, accomplish assembly manipulation immediately, thereby the 41c of portion, 41d form oxide-film, overheated such worry when the resistance that produces through this oxide-film causes switching on regard to screwing at screw thread after not had.In addition,, can obtain the film formed effect of slow oxidation if bolt part is implemented zinc-plated processing, make the assembling till have plenty of time.
In addition, through screw thread screw the 41c of portion, 41d is disposed in the insulating oil 6, the such effect of exothermal efficiency also can improve.Screw thread screws the 41c of portion, 41d because the contact resistance between the bolt is unavoidably big than other part heat release, and the tendency of the high heat that becomes is arranged.If become high heat, this heat is passed to oil-paper capacitor core 5 through center conductor trunk 41, has heat to worsen the problem as the insulating paper of oil-paper capacitor core base material.But; Among the present invention; Through screw thread is screwed the 41c of portion, 41d is arranged on the position of soaking in the oil, and is different with the situation in gas, the heat of generation is directly passed to the insulating oil of surrounding liquid; Can not reach the high temperature that makes as the insulating paper deterioration degree of oil-paper capacitor core base material, can effectively eliminate the hot deterioration problem of insulating paper.
The user of insulating sleeve connects top terminal 9 in the upper end that the energising terminal connects with top conductor 42; After the lower end of terminal connection with lower metal part 43 that switch on connects oily terminal 10; Use this insulating sleeve; The present invention is owing to be exposed to the energising terminal of insulating sleeve upper end and connect with top conductor 42 by copper, and the connection of energising terminal is that the metallic parts constitute by copper also with lower metal part 43, therefore; Eliminated oxide-film such when forming the aluminium alloy part that uses in the past, by this resistance overheated such worry when switching on.
Other execution mode
Fig. 5 shows the cross-sectional illustration figure of the oil insulator of the present invention of other execution mode.The center conductor trunk 41 of Fig. 6 displayed map 5 is connected the expansion key diagram that screws connecting portion with the screw thread of top conductor 42 with the energising terminal.In this execution mode, center conductor trunk 41 is connected with top conductor 42 and connects with the energising terminal through tube connector 14.Tube connector 14 can be a copper, also can be aluminium alloy system.The 14a of upper bolt portion of tube connector 14 screws and is arranged on the energising terminal and is connected the connection with the bolt part 42b of top conductor 42 bottoms through screw thread.The 14b of lower bolt portion of tube connector 14 screws with the bolt part 41a that is arranged on center conductor trunk 41 tops through screw thread and is connected.
Near the central height of tube connector 14, be provided with discharge orifice 14c.Through becoming such structure, screw thread screws the bolt footpath of portion and compares with above-mentioned execution mode, can be bigger, and therefore, bigger tension force can bear in the portion of screwing, and has to bear the bigger such effect of center fastening force.
In addition, in this execution mode, discharge orifice 14c is disposed at the bottom of expanding chamber 7.Through becoming such structure, can make the insulating oil convection current of outflow with the mode of soaking into expanding chamber 7 inner faces to discharge orifice 14c.Through carrying out such insulating oil convection current, can improve heat transfer efficiency to expanding chamber 7, from carrying out heat release to the outside here, therefore, compare with above-mentioned execution mode, can realize more excellent exothermal efficiency.
Embodiment
The present invention screws the connection of the upper and lower side that carries out center conductor trunk 41 through screw thread.Other method that this connection is connected with metal covering fusions such as for example making arc welding or friction welding (FW) is compared, and mechanical property is excellent.That is, this is because because material is not applied heat, do not have the material that is caused by heat and reduce.Therefore, when insulating sleeve is applied external force, has sufficient endurance.But on the contrary, bolt connects situation about being connected with motlten metal to be compared, and the contact resistance on composition surface is big, and the bad influence of heating when energising is arranged particularly produces tremendous influence during short circuit current flow in insulating sleeve.If to be screwed into usually, this bolt of only screwing suitable is screwed moment of torsion under the state of tightening with general, short circuit current flow, and the Joule heat that nearly all situation is produced by short circuit current makes the bolt part thermal extremes that becomes, and produces fusing.For example, be 50mm, long when being the bolt of 40mm with the common moment of torsion of the screwing diameter of screwing, the contact resistance of connecting portion is approximately about 50 μ Ω, still, and if flow through 50 therein, the short circuit current of 000A, it consumes electricity is 50,000 * 50,000 * 50 * 10
-6=125,000W produces heat by 2 seconds short circuits and reaches 50,000J, and therefore, low-melting aluminium alloy produces fusing.Even do not reach fusing, because the influence of heat reduces the mechanical strength of material, therefore, the situation of aluminium alloy arrives temperature when in insulating sleeve standard JEC-5202 or IEC 60137, having stipulated the short circuit current energising can not be above 180 ℃.The present invention has solved this difficult point with effective countermeasure.This is through powerful center fastening force, applies strong compressing surface between the bolt that double thread screws and presses, and makes contact resistance become extremely low.
Promptly; For example in the execution mode of Fig. 2; Because the compression stress that puts on 0LE_LINK10LE_LINK2 spring 80LE_LINK10LE_LINK2 is through binding nut 13; The terminal of will switching on connection, screws among the 41c of portion with the screw thread that the energising terminal is connected with top conductor 42 at center conductor trunk 41 to the top, top with top conductor 42, and this compression stress plays a role as the tension force with value.This is called the center fastening force.This center fastening force also is connected screw thread with lower metal part 43 simultaneously and screws among the 41d of portion and play a role with the terminal of switching in the lower end of center conductor trunk 41.The number side by side of spring 8 is many more, and the center fastening force that applies is powerful more.In addition, this progression is many more, because the thermal expansion the during variations in temperature of each parts is shunk, the degree that the center fastening force descends is few more, thereby stable more.
Below table 1 shows and is used for that screw thread of the present invention screws portion's performance and the short circuit test result that carries out.
Table 1
As shown in table 1, the screw thread portion of screwing of tightening structure with bolt in the past fuses, and center of the present invention fastening type does not have unusual and do not sustained short circuit.This is because by the effect of the present invention through powerful center fastening force, and the face of bolt contact-making surface is pressed and become high, and the contact resistance that the screw thread of center fastening type screws portion is approximately the low like this value of 1 μ Ω.
Claims (3)
1. oil insulator is characterized in that having:
The insulating sleeve body, it comprises gas side insulator, oily side insulator and the mounting flange metal-ware between two insulators,
Connect said insulating sleeve body center conductor and
The energising terminal connects uses the lower metal part, and its bottom and center conductor screw thread at said insulating sleeve body screws;
Wherein, Said center conductor comprises that the center conductor trunk is connected and uses top conductor with the energising terminal; Said center conductor trunk configured in one piece is among said oil insulator, and said energising terminal connects the upper end, high-pressure side that is combined on said center conductor trunk with the top conductor screw thread
It is that metal parts constitutes by copper or copper that said energising terminal connection is connected with the lower metal part with top conductor with the energising terminal,
Said center conductor trunk is made up of aluminium alloy part.
2. oil insulator according to claim 1 wherein, is connected the connecting portion that screws with the top conductor screw thread under the pasta of the insulating oil that is filled in oil insulator inside with the upper end, high-pressure side of said center conductor trunk with the energising terminal.
3. oil insulator according to claim 1 and 2 wherein, has screw thread for the bottom that is positioned at center conductor and screws the center fastening structure that portion and the screw thread portion of screwing that is positioned at the upper end, high-pressure side of center conductor trunk apply tensile stress.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009036089A JP4796638B2 (en) | 2009-02-19 | 2009-02-19 | Oil-filled bushing |
| JP2009-036089 | 2009-02-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101814347A CN101814347A (en) | 2010-08-25 |
| CN101814347B true CN101814347B (en) | 2012-10-31 |
Family
ID=42621571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101135582A Expired - Fee Related CN101814347B (en) | 2009-02-19 | 2010-02-05 | Insulating sleeve for oil filling |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4796638B2 (en) |
| CN (1) | CN101814347B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6159967B2 (en) * | 2013-03-14 | 2017-07-12 | 日本碍子株式会社 | Oil immersion paper capacitor bushing |
| EP3023997B1 (en) * | 2014-11-24 | 2017-06-21 | ABB Schweiz AG | An electrical power component containing an insulating fluid and a condenser core |
| CN105469958B (en) * | 2016-01-05 | 2018-04-03 | 北京中联科创高压电器有限公司 | A kind of high current glue soaks fiber dry-type capacitance type bushing shell for transformer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293887Y (en) * | 1997-04-01 | 1998-10-07 | 谷杏石 | Plastic insulating sleeve tube |
| CN201084502Y (en) * | 2007-09-07 | 2008-07-09 | 西安电力机械制造公司 | An oil-immersed paper condenser-type wall-penetrating busing insulator |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5163490A (en) * | 1974-11-29 | 1976-06-01 | Tokyo Shibaura Electric Co | PUTSUSHINGU |
| JPS5621316U (en) * | 1979-07-27 | 1981-02-25 | ||
| JPS6245389Y2 (en) * | 1981-04-09 | 1987-12-04 | ||
| JPH083969B2 (en) * | 1989-07-21 | 1996-01-17 | 日本碍子株式会社 | Center clamp bushing |
| CA2013254A1 (en) * | 1990-03-13 | 1991-09-13 | William R. Rueth, Jr. | High-voltage outdoor electrical bushing |
| JP2963645B2 (en) * | 1995-07-25 | 1999-10-18 | 日本碍子株式会社 | Cage-shaped connecting conductor and bushing using the same |
| JP2000294426A (en) * | 1999-04-06 | 2000-10-20 | Toshiba Corp | Capacitor bushing |
| JP2002093630A (en) * | 2000-09-14 | 2002-03-29 | Mitsubishi Electric Corp | Oil-immersed bushing |
| JP2003007158A (en) * | 2001-06-25 | 2003-01-10 | Energy Support Corp | Bushing |
-
2009
- 2009-02-19 JP JP2009036089A patent/JP4796638B2/en not_active Expired - Fee Related
-
2010
- 2010-02-05 CN CN2010101135582A patent/CN101814347B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293887Y (en) * | 1997-04-01 | 1998-10-07 | 谷杏石 | Plastic insulating sleeve tube |
| CN201084502Y (en) * | 2007-09-07 | 2008-07-09 | 西安电力机械制造公司 | An oil-immersed paper condenser-type wall-penetrating busing insulator |
Non-Patent Citations (2)
| Title |
|---|
| JP平3-245419A 1991.11.01 |
| JP昭60-211708A 1985.10.24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4796638B2 (en) | 2011-10-19 |
| CN101814347A (en) | 2010-08-25 |
| JP2010192277A (en) | 2010-09-02 |
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