CN103050240A - Lead-out device of transformer bushing end screen signal - Google Patents
Lead-out device of transformer bushing end screen signal Download PDFInfo
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- CN103050240A CN103050240A CN 201210551614 CN201210551614A CN103050240A CN 103050240 A CN103050240 A CN 103050240A CN 201210551614 CN201210551614 CN 201210551614 CN 201210551614 A CN201210551614 A CN 201210551614A CN 103050240 A CN103050240 A CN 103050240A
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- 230000001681 protective effect Effects 0.000 claims abstract description 55
- 230000008878 coupling Effects 0.000 claims description 44
- 238000010168 coupling process Methods 0.000 claims description 44
- 238000005859 coupling reaction Methods 0.000 claims description 44
- 238000007789 sealing Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000003780 insertion Methods 0.000 abstract description 5
- 230000037431 insertion Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The invention provides a lead-out device of a transformer bushing end screen signal. The lead-out device of the transformer bushing end screen signal which is used for leading out leakage current from an end screen leading wire post of a capacitive type bushing end screen comprises an outer joint sleeved on an interface of the capacitive type bushing end screen through a mounting hole, a protective sleeve connected with the outer joint and provided with a leading wire hole, and a conducting rod connected to the protective sleeve through an elastic insulating member, wherein at least two connecting petals which form an insertion hole matching with the end screen lead-out line are arranged at one end of the conducting rod near the mounting hole along a circumferential direction; and the elastic insulating member is sleeved on the connecting petals. The size of the insertion hole is changeable along with the insertion depth of the end screen lead-out line; and the elastic insulating member sleeved on the connecting petals can clamp the end screen lead-out line through elasticity change of the elastic insulating member. Therefore, lead-out device of the transformer bushing end screen signal, disclosed by the invention, has the advantages of efficiently increasing a contact area, and thereby improving connection stability as the contact between the end screen lead-out line and the lead-out device of the bushing end screen signal is a surface contact, that is, a circumference contact.
Description
Technical field
The present invention relates to the transformer technology field, particularly a kind of Transformer Bushing Tap signal ejector.
Background technology
Transformer is to utilize the principle of electromagnetic induction to change the device of alternating voltage, and it is the capital equipment of electric power system, mainly realizes boosting and step-down in the delivery of electrical energy process, and its reliability of operation directly affects the safety and stablization of electric power system.
Wherein, sleeve pipe is the important component part of power transformer, and it mainly realizes connection, insulation against ground and the supporting role of the inner outlet of transformer, is one of principal element that causes at present transformer fault.Because the condition of work of sleeve pipe is very severe, so it is usually because of gradually deteriorated or damage of environmental impact, and cause electric network fault.In order to guarantee the normal operation of electrical network, need to carry out effective preventive trial and on-line monitoring to sleeve pipe.
For even distribution electric field, bushing is made of the insulating barrier between multiple layer metal screen and screen, end shield is its last screen, be used for being connected with the ground equipotential, in service its must reliable ground, therefore can't obtain end shield Leakage Current signal, be connected in order to detect capacitance and the dielectric loss of sleeve pipe and when preventive trial, need untie with earthy.The sleeve pipe insulation line monitoring device need to be measured Leakage Current from bottom shielding of bushing, and an end of electric current ejector is connected with the end shield lead-out wire of bottom shielding of bushing, and the other end is linked into current measuring device, and then ground connection.
But, the conducting rod of end shield ejector is connected with the contacts side surfaces that is connected to of the end shield lead-out wire of bottom shielding of bushing at present, so that contact area is less, be unfavorable for both connections, especially when the end shield ejector shakes, be easy to cause connecting unstable, and then the accuracy measured of impact.
Therefore, how providing a kind of Transformer Bushing Tap signal ejector, with the raising contact area, and then improve the stability that connects, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of Transformer Bushing Tap signal ejector, with the raising contact area, and then improve the stability that connects.
For solving the problems of the technologies described above, the invention provides following technical scheme:
A kind of Transformer Bushing Tap signal ejector, the Leakage Current on the end shield lead-out wire of drawing the condenser bushing end shield comprises:
Be set in the coupling on the interface of described condenser bushing end shield by installing hole;
With the protective sleeve that described coupling links to each other, offer wire guide on the described protective sleeve;
By elastic insulated conducting rod that is connected with described protective sleeve, one end of the close described installing hole of described conducting rod has at least two lobes to form the lobe that is connected with the plug-in opening of described end shield lead-out wire cooperation along circumferential arrangement, and described elastic insulated is set on the described connection lobe.
Preferably, in the above-mentioned device, the axis of described conducting rod is parallel with the axis of described protective sleeve, and the end away from described installing hole of described conducting rod offers the first screwed hole.
Preferably, in the above-mentioned device, also comprise be used to connecting described protective sleeve and described elastic insulated interior adapter.
Preferably, in the above-mentioned device, the outer surface of described interior adapter links to each other by screw thread with the inwall of described protective sleeve, and the outer surface of described interior adapter offers the second screwed hole.
Preferably, in the above-mentioned device, also comprise the protective resistance that is installed in described the first screwed hole and the second screwed hole.
Preferably, in the above-mentioned device, also comprise be used to the attaching nut who connects described coupling and described protective sleeve.
Preferably, in the above-mentioned device, described attaching nut is provided with internal thread, and described coupling is provided with the external screw thread with described screw-internal thread fit, and described attaching nut is provided with the first projection, is provided with the second projection on the described protective sleeve.
Preferably, in the above-mentioned device, also comprise the outer surface that is arranged on described protective sleeve, and be used for limiting described attaching nut to the first spacing jump ring that moves away from the direction of described coupling; Be arranged on the described conducting rod, be used for preventing that described conducting rod breaks away from the second described elastic insulated spacing jump ring.
Preferably, in the above-mentioned device, also comprise be used to the first sealing device of the junction that seals described coupling and described end shield interface with for the second sealing device that seals described coupling and described protective sleeve.
Preferably, in the above-mentioned device, also comprise the water joint that is arranged on described wire guide place.
Can find out from above-mentioned technical scheme, the invention provides a kind of Transformer Bushing Tap signal ejector, be used for drawing the Leakage Current on the end shield lead-out wire of condenser bushing end shield, it comprises: be set in the coupling on the interface of condenser bushing end shield by installing hole; The protective sleeve that links to each other with coupling offers wire guide on this protective sleeve; By elastic insulated conducting rod that is connected with protective sleeve, the plug-in opening that an end of the close installing hole of this conducting rod has at least two lobes to form to cooperate with the end shield lead-out wire along circumferential arrangement be connected lobe, and elastic insulated is set on the connection lobe.When detecting, coupling is installed on the interface of condenser bushing end shield, guarantee that simultaneously the end shield lead-out wire is inserted in the plug-in opening that connects lobe formation, has namely realized the current delivery on the end shield lead-out wire to conducting rod.Plug-in opening connects lobe by at least two lobes and forms, the large I that is plug-in opening changes with the insertion depth of end shield lead-out wire, and be set in elastic insulated that connects on the lobe, by the Flexible change of self, realize to being plugged into the clamping of the end shield lead-out wire in the plug-in opening, therefore, the present invention changes end shield lead-out wire and contacting of bottom shielding of bushing signal ejector into the face contact, be the side face contact of end shield lead-out wire, effectively increased contact area, and then improved the stability that connects.
Description of drawings
The structural representation of the Transformer Bushing Tap signal ejector that Fig. 1 provides for the embodiment of the invention;
The structural representation of the conducting rod that Fig. 2 provides for the embodiment of the invention;
The cutaway view of the conducting rod that Fig. 3 provides for the embodiment of the invention.
Embodiment
Core of the present invention provides a kind of Transformer Bushing Tap signal ejector, with the raising contact area, and then improves the stability that connects.
In order to make those skilled in the art person understand better the present invention program, the present invention is described in further detail below in conjunction with drawings and embodiments.
Please refer to Fig. 1-shown in Figure 3, the invention discloses a kind of Transformer Bushing Tap signal ejector, be used for drawing the Leakage Current on the end shield lead-out wire of condenser bushing end shield, it comprises: be set in the coupling 1 on the interface of condenser bushing end shield by installing hole; The protective sleeve 4 that links to each other with coupling 1 offers wire guide on this protective sleeve 4; By elastic insulated 9 conducting rod 6 that is connected with protective sleeve 4, the plug-in opening that an end of the close installing hole of this conducting rod 6 has at least two lobes to form to cooperate with the end shield lead-out wire along circumferential arrangement be connected lobe 61, and elastic insulated 9 is set on the connection lobe 61.
When detecting, coupling 1 is installed on the interface of condenser bushing end shield, guarantee that simultaneously the end shield lead-out wire is inserted in the plug-in opening that connects lobe 61 formation, has namely realized the current delivery on the end shield lead-out wire to conducting rod 6.Plug-in opening connects lobe 61 by at least two lobes and forms, the large I that is plug-in opening changes with the insertion depth of end shield lead-out wire, and be set in elastic insulated 9 that connects on the lobe 61, by the Flexible change of self, realize to being plugged into the clamping of the end shield lead-out wire in the plug-in opening, therefore, the present invention changes end shield lead-out wire and contacting of bottom shielding of bushing signal ejector into the face contact, namely the side face with the end shield lead-out wire contacts, and has effectively increased contact area, and then has improved the stability that connects.
In specific embodiment, the number and the length that connect lobe 61 are not done restriction, the operator can set according to different needs.Particularly, connect lobe 61 and can be three lobes or pintongs, its material is the copper material with electric conductivity.
In the present embodiment, the axis of the axis of conducting rod 6 and protective sleeve 4 is set to be arranged in parallel, and offers the first screwed hole 62 at the end away from installing hole of conducting rod 6.Be inserted in the plug-in opening that connects lobe 61 formation for the ease of the end shield lead-out wire, preferably, the axis of plug-in opening and the dead in line of installing hole arranged that namely the corresponding installing hole of plug-in opening is arranged.In testing process, conducting rod 6 is by being connected with the end shield lead-out wire, to realize that with the current delivery on the end shield lead-out wire to conducting rod, the external signal cable is then by the first screwed hole 62, realization is connected with conducting rod 6, thereby realizes detecting the purpose of the electric current on the conducting rod 6.
In the specific embodiment, also comprise for the interior adapter 11 that connects protective sleeve 4 and elastic insulated 9, when mounted namely, realize protective sleeves 4 and be connected a connection of 9 by interior adapter 11.When actual the setting, interior adapter 11 is set to hollow structure, and with elastic insulated 9 hollow position place that is fastened on interior adapter 11, to realize the connection to elastic insulated 9.Preferably, the inner ring of elastic insulated 9 outer ring and interior adapter 11 is threaded connection, and the outer ring of elastic insulated 9 inner ring and described conducting rod 6 is threaded connection.
Preferably, the outer surface of interior adapter 11 links to each other by screw thread with the inwall of protective sleeve 4, and the outer surface of interior adapter 11 is provided with the second screwed hole (not marking among the figure).It will be appreciated by persons skilled in the art that between interior adapter 11 and the protective sleeve 4 and also can realize being connected by other connected modes, and all in protection range.
Further among the embodiment, this Transformer Bushing Tap signal ejector also comprises the protective resistance 7 that is installed between the first screwed hole 62 and the second screwed hole.One end of this protective resistance 7 is installed in the first screwed hole 62, and the other end is installed in the second screwed hole.By protective resistance 7 is set, in the time of can guaranteeing that externally the signal cable accident opens circuit, bottom shielding of bushing still can pass through protective resistance 7 ground connection, prevents the bottom shielding of bushing open circuit, guarantees the casing safety operation.
The connected mode of a kind of protective sleeve 4 and coupling 1 also is provided in the present embodiment, particularly, has realized the connection that coupling 1 is connected with protective sleeve by attaching nut 2.It will be appreciated by persons skilled in the art that in actual production and can connect according to different connected modes, and all in the present embodiment protection range.
Particularly, attaching nut 2 internal thread is set, at the external screw thread of coupling 1 setting with screw-internal thread fit, namely by threaded engagement, realization attaching nut 2 is connected with coupling 1 accordingly.The side away from coupling 1 attaching nut 2 arranges the first projection, and the internal diameter of the first projection is greater than the external diameter of protective sleeve 4, correspondingly, and in arranged outside second projection of protective sleeve 4.When mounted, attaching nut 2 is connected with coupling 1 by screw thread, and with first convex to form the first groove, and the second projection on the protective sleeve 4 just is stuck in the above-mentioned groove, thus the connection of coupling 1 being connected with protective sleeve by attaching nut 2.
In addition, in coupling 1 the second groove is set, correspondingly, at interior adapter 11 the 3rd projection is set.During installation, the 3rd projection of interior adapter 11 can extend in the second groove of coupling 1, thereby realizes spacing connection.By above-mentioned setting, effectively guarantee the sealing of device, and played this connected mode easy accessibility, greatly reduce operator's labour intensity.
In actual mechanical process, for prevent between attaching nut 2 and the coupling 1 be threaded loosening after, attaching nut 2 comes off from coupling 1, is provided with for limited connection nut 2 to the first spacing jump ring 3 that moves away from the direction of coupling 1 at protective sleeve 4 in the present embodiment.When attaching nut 2 became flexible, relative displacement occured in itself and coupling 1, and when it moved to the first spacing jump ring 3 position, attaching nut 2 can not continue operation, thereby has stoped its problem that comes off from coupling 1.
In addition, in order to prevent conducting rod 6 from elastic insulated 9 disengaging, present embodiment also is provided with the second spacing jump ring 8, particularly, the second jump ring 8 is arranged on the end away from installing hole of conducting rod 6.Because elastic insulated 9 inner rings link to each other with conducting rod 6, the outer ring links to each other with interior adapter 11, therefore, and when the end shield lead-out wire is extracted from connecting lobe 61, if conducting rod 6 during with elastic insulated 9 be connected tightr, can cause conducting rod 6 to break away from elastic insulated 9 with the end shield lead-out wire.The application can prevent elastic insulated 9 and conducting rod 6 generation relative displacements by the second jump ring 8, thereby prevents that conducting rod 6 breaks away from these devices.
On the basis of technique scheme, in order to guarantee the overall tightness of this Transformer Bushing Tap signal ejector, with the problem that prevents to leak electricity, also comprise the first sealing device 12 that is arranged between coupling 1 and the end shield interface in the present embodiment, and be arranged on the second sealing device 10 between coupling 1 and the protective sleeve 4.Particularly, when coupling 1 links to each other with the interface of condenser bushing end shield, the sealing that the first sealing device 12 guarantees between the two; When coupling 1 and protective sleeve 4 are tightened, the sealing that the second sealing device 10 guarantees between the two.Preferably, this first sealing device 12 and the second sealing device 10 can be all seal washer, but present embodiment is not done restriction to its concrete form.
Further among the embodiment, the fail safe for the external signal cable that guarantees to draw from wire guide is provided with water joint 5 at the wire guide place.By the sealing of water joint 5 realizations to the wire guide place.The shell of this water joint 5 is metal material, to guarantee intensity and the hardness of water joint 5; And inside is plastic material, to guarantee insulating properties and the sealing of water joint 5.Be not limited in above-mentioned material in the present embodiment, when practical operation, can select according to different needs.
Before installing at the scene, at first each parts with protective sleeve 4 inside install, and signal cable is drawn by the water joint 5 of protective sleeve 4 ends.When mounted, at first the ground connection cap of the interface of bottom shielding of bushing is backed out, and coupling 1 is fixed on the position of original ground connection cap by screw thread.Then before mounted protective sleeve overall structure is aimed at coupling 1, sleeve end shield lead-out wire is just in time inserted in the plug-in opening of conducting rod 6, rotation protective sleeve overall structure, until can't rotate, the 3rd projection of adapter 11 front ends just in time snaps in the second groove of coupling 1 in this moment.The external screw thread of at last attaching nut 2 being aimed in the couplings 1 is tightened, and realizes being connected between bottom shielding of bushing and the coupling 1.
When carrying out sleeve pipe power failure test, need to pull down this signal ejector.Turn on attaching nut 2 this moment, then the protective sleeve overall structure pulled up to get final product, and coupling 1 need not pulled down.This dismounting mode is removed protective resistance 7, terminal signal cable together, causes signal cable to reverse in the time of can preventing from removing to cause connecting the problem of open circuit, forgets the hidden danger of loading onto after also can avoiding removing protective resistance 7 simultaneously.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. Transformer Bushing Tap signal ejector is used for drawing the Leakage Current on the end shield lead-out wire of condenser bushing end shield, it is characterized in that, comprising:
Be set in the coupling (1) on the interface of described condenser bushing end shield by installing hole;
The protective sleeve (4) that links to each other with described coupling (1), described protective sleeve offers wire guide on (4);
The conducting rod (6) that is connected with described protective sleeve (4) by elastic insulated (9), one end of the close described installing hole of described conducting rod (6) along circumferential arrangement have at least two lobes form with the plug-in opening of described end shield lead-out wire cooperation be connected lobe (61), and described elastic insulated (9) are set on the described connection lobe (61).
2. device according to claim 1 is characterized in that, the axis of described conducting rod (6) is parallel with the axis of described protective sleeve (4), and the end away from described installing hole of described conducting rod (6) offers the first screwed hole (62).
3. device according to claim 2 is characterized in that, also comprises be used to the interior adapter (11) that connects described protective sleeve (4) and described elastic insulated (9).
4. device according to claim 3 is characterized in that, the outer surface of described interior adapter (11) links to each other by screw thread with the inwall of described protective sleeve (4), and the outer surface of described interior adapter (11) offers the second screwed hole.
5. device according to claim 4 is characterized in that, also comprises the protective resistance (7) that is installed in described the first screwed hole (62) and the second screwed hole.
6. device according to claim 1 is characterized in that, also comprises be used to the attaching nut (2) who connects described coupling (1) and described protective sleeve (4).
7. device according to claim 6, it is characterized in that, described attaching nut (2) is provided with internal thread, described coupling (1) is provided with the external screw thread with described screw-internal thread fit, and described attaching nut (2) is provided with the first projection, and described protective sleeve is provided with the second projection on (4).
8. device according to claim 6 is characterized in that, also comprises the outer surface that is arranged on described protective sleeve (4), and is used for limiting described attaching nut (2) to the first spacing jump ring (3) that moves away from the direction of described coupling (1); Be arranged on the described conducting rod (6), be used for preventing that described conducting rod (6) breaks away from the second spacing jump ring (8) of described elastic insulated (9).
9. each described device according to claim 1-8, it is characterized in that, also comprise be used to sealing described coupling (1) with first sealing device (12) of the junction of described end shield interface with for sealing second sealing device (10) of described coupling (1) with described protective sleeve (4).
10. device according to claim 9 is characterized in that, also comprises the water joint (5) that is arranged on described wire guide place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210551614.XA CN103050240B (en) | 2012-12-17 | 2012-12-17 | A kind of Transformer Bushing Tap signal ejector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210551614.XA CN103050240B (en) | 2012-12-17 | 2012-12-17 | A kind of Transformer Bushing Tap signal ejector |
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| CN103050240A true CN103050240A (en) | 2013-04-17 |
| CN103050240B CN103050240B (en) | 2015-12-02 |
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| CN201210551614.XA Active CN103050240B (en) | 2012-12-17 | 2012-12-17 | A kind of Transformer Bushing Tap signal ejector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325551A (en) * | 2013-06-28 | 2013-09-25 | 国家电网公司 | End screen outgoing line protection and anti-interference device |
| CN103344792A (en) * | 2013-06-28 | 2013-10-09 | 国家电网公司 | End screen downwards leading structure for monitoring transformer sleeve |
| CN106940415A (en) * | 2017-02-07 | 2017-07-11 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | The detecting system of capacitance sleeve pipe with measurement terminal and end shield ground terminal |
| CN108899159A (en) * | 2018-06-21 | 2018-11-27 | 广东电网有限责任公司 | A kind of protective device of for transformer |
| CN109177957A (en) * | 2018-08-21 | 2019-01-11 | 吉林东光奥威汽车制动系统有限公司 | A kind of vacuum booster of pair of input power push rod limit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661848A (en) * | 2009-10-09 | 2010-03-03 | 闫淼江 | Contact assembly of isolating switch |
| CN202256571U (en) * | 2011-10-31 | 2012-05-30 | 马鞍山市万缘电气有限责任公司 | Leakage current signal lead-out device of power transformer sleeve for online monitoring |
| CN202443837U (en) * | 2012-02-08 | 2012-09-19 | 广西电网公司南宁供电局 | Leading-out device for bushing end shield of transformer |
| CN202996530U (en) * | 2012-12-17 | 2013-06-12 | 浙江省电力公司电力科学研究院 | Transformer bushing end screen signal leading-out apparatus |
-
2012
- 2012-12-17 CN CN201210551614.XA patent/CN103050240B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103325551A (en) * | 2013-06-28 | 2013-09-25 | 国家电网公司 | End screen outgoing line protection and anti-interference device |
| CN103344792A (en) * | 2013-06-28 | 2013-10-09 | 国家电网公司 | End screen downwards leading structure for monitoring transformer sleeve |
| CN103344792B (en) * | 2013-06-28 | 2015-08-19 | 国家电网公司 | Guiding structure under special end shield monitored by a kind of bushing shell for transformer |
| CN106940415A (en) * | 2017-02-07 | 2017-07-11 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | The detecting system of capacitance sleeve pipe with measurement terminal and end shield ground terminal |
| CN108899159A (en) * | 2018-06-21 | 2018-11-27 | 广东电网有限责任公司 | A kind of protective device of for transformer |
| CN109177957A (en) * | 2018-08-21 | 2019-01-11 | 吉林东光奥威汽车制动系统有限公司 | A kind of vacuum booster of pair of input power push rod limit |
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| Publication number | Publication date |
|---|---|
| CN103050240B (en) | 2015-12-02 |
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Address after: Hangzhou City, Zhejiang province 310014 eight District No. 1, Huadian Zhaohui Applicant after: Electric Power Research Institute of State Grid Zhejiang Electric Power Company Applicant after: State Grid Corporation of China Applicant after: Hangzhou Kelin Electric Power Equipment Co., Ltd. Address before: Hangzhou City, Zhejiang province 310014 eight District No. 1, Huadian Zhaohui Applicant before: Electric Power Science Research Institute of Zhejiang Electric Power Company Applicant before: State Grid Corporation of China Applicant before: Hangzhou Kelin Electric Power Equipment Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: THE ELECTRIC POWER RESEARCH INSTITUTE OF ZHEJIANG ELECTRIC POWER CORPORATION TO: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID ZHEJIANG ELECTRIC POWER COMPANY |
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Address after: Hangzhou City, Zhejiang province 310014 eight District No. 1, Huadian Zhaohui Co-patentee after: State Grid Corporation of China Patentee after: Electric Power Research Institute of State Grid Zhejiang Electric Power Company Co-patentee after: Hangzhou Colin electric Limited by Share Ltd Address before: Hangzhou City, Zhejiang province 310014 eight District No. 1, Huadian Zhaohui Co-patentee before: State Grid Corporation of China Patentee before: Electric Power Research Institute of State Grid Zhejiang Electric Power Company Co-patentee before: Hangzhou Kelin Electric Power Equipment Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |