CN205211565U - A ground connection extraction device for transformer core and folder - Google Patents
A ground connection extraction device for transformer core and folder Download PDFInfo
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- CN205211565U CN205211565U CN201521030116.6U CN201521030116U CN205211565U CN 205211565 U CN205211565 U CN 205211565U CN 201521030116 U CN201521030116 U CN 201521030116U CN 205211565 U CN205211565 U CN 205211565U
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- folder
- transformer core
- ground connection
- end cap
- transformer
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Abstract
The utility model provides a ground connection extraction device for transformer core and folder, including the end cover, supply the earthing cable of transformer core ground connection and folder ground connection respectively, the end cover includes preceding terminal surface, encloses the outer lateral wall and the rear end cap of ranging back of following of terminal surface in the front, inside preceding terminal surface and the lateral wall embedding transformer, the rear end cap approximately closes with sealing of transformer core and folder mutually, earthing cable wears out the end cover from preceding terminal surface. The utility model has the advantages of simple and reasonable structure, can use the ampere meter to expose the electric current that some measurements iron core, folder earthing cable flow respectively at earthing cable, need not to unpack apart more mounted, confined end cover to improve efficiency of software testing, reduced the operating risk.
Description
Technical field
The utility model relates to the technical field of power transformer, particularly relates to the ground extractor for transformer core and folder.
Background technology
Power transformer is power equipment important in electric power system.When it normally runs, inner iron core, folder are all in the electric field around winding, and as earth-free, iron core, folder can produce certain floating potential, when this current potential exceed over the ground discharge voltage time, will electric discharge phenomena be produced.In order to avoid inside transformer electric discharge, iron core, folder need ground connection; On the other hand, if multipoint earthing situation appears in transformer core, folder, then every two earth points form closed-loop path by iron core, folder self and ground path, can produce induction circulation, make iron core, folder overheated, cause localized burn time serious in loop.Therefore, transformer core, folder must have and only have a some ground connection.
Have in order to ensure transformer core, folder during operation and only have a some ground connection, according to south electric network " power equipment preventive trial code ", need monthly measure iron core, clamp earthing current.This will ask the earth connection of transformer core, folder must cause transformer outside, and then ground connection.And existing transformer core, folder earthing device all adopt hermetically-sealed construction, iron core, folder are positioned at seal cover.When operation maintenance personnel carries out iron core, folder ground connection checks, all need to remove bolt and just can open seal cover inspection.This mode wastes time and energy, and operating efficiency is low, and dismounting seal cover can cause the aging distortion of insulation cushion rubber frequently, and sealing is deteriorated, and easily causes transformer body iron core, folder to draw copper bar and bolt and to make moist corrosion.Situation seriously can cause bolt corrosion to rupture, and causes iron core, folder electric potential floating, and then crisis device security, there is larger potential safety hazard.In addition, former seal cover adopts cast iron quality, also very easily causes lid rust corrosion.
For this reason, be necessary to improve the ejector of transformer core, folder.
Summary of the invention
For prior art Problems existing, the utility model proposes a kind of ground extractor for transformer core and folder, to improve test condition and test mode, improve testing efficiency, reduce operating risk.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows:
For the ground extractor of transformer core and folder, comprise end cap, supply the earth cable of transformer core grounding and folder ground connection respectively, described end cap comprises front end face, is trapped among front end face outer and the sidewall extended back and rear end cap, described front end face and sidewall embed inside transformer, rear end cap covers mutually with the sealing of transformer core and folder, and described earth cable passes end cap from front end face.
The position passing front end face at described earth cable is provided with water joint.
The utility model has the advantages that: it is simple and reasonable for structure, end cap is adopted to instead of the seal cover of traditional transformer iron core, folder earthing device, its front end face and sidewall is made to embed inside transformer, and pass rear ground connection in the cavity that surrounds from front end face and sidewall of earth cable, the electric current that ammeter measures iron core at earth cable exposed parts, folder earth cable flows out respectively can be used thus, without the need to taking end cap that is already installed, that close again apart, thus raising testing efficiency, reduce operating risk; And the contact site of earth cable and end cap front end face is provided with water joint, its classification of waterproof can reach IP68 level.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Description of reference numerals: 11, front end face; 12, sidewall; 13, rear end cap; 20, water joint; 30, earth cable; 40, cold end terminal.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, for the ground extractor of transformer core and folder, comprise end cap, supply the earth cable 30 of transformer core grounding and folder ground connection respectively, described end cap comprises front end face 11, is trapped among front end face 11 outer and the sidewall 12 extended back and rear end cap 13, described front end face 11 and sidewall 12 embed inside transformer, rear end cap 13 covers mutually with the sealing of transformer core and folder, and described earth cable 30 passes end cap from front end face 11.
Further, the position passing front end face 11 at described earth cable 30 is provided with water joint 20.
In the present embodiment, the end cover body size of employing is identical with former transformer seal cover, can replace former seal cover, and set bolt can be adopted to be arranged on transformer relevant position, makes end cap cover in the sealing of transformer core, folder.Totally two, earth cable 30 line, is respectively used to iron core, folder ground connection.Every bar earth cable 30 is 35 squares of copper cash, and wraps up polyvinyl chloride insulation skin, and after earth cable 30 passes end cap, joint adopts cold end terminal 40, and adopts bolt to be connected with the binding post of transformer core, folder sealing part at rear end cap 13.In addition, the position that earth cable 30 passes front end face 11 adopts water joint 20, can reach IP68 classification of waterproof.
During operation, transformer core, clamp earthing current flow through respective earth cable 30 respectively, clamp on amperemeter only need be used to measure at earth cable 30 exposed parts, without the need to taking seal cover apart, greatly reduce the test jobs time thus, improve testing efficiency, decrease operating risk.End cover body also can adopt 304 stainless steels, effectively avoids rust corrosion problem.
Above-listed detailed description is illustrating for the utility model possible embodiments, and this embodiment is also not used to limit the scope of the claims of the present utility model, does not allly depart from the equivalence that the utility model does and implements or change, and all should be contained in the scope of the claims of this case.
Claims (2)
1. for the ground extractor of transformer core and folder, it is characterized in that, comprise end cap, supply the earth cable of transformer core grounding and folder ground connection respectively, described end cap comprises front end face, is trapped among front end face outer and the sidewall extended back and rear end cap, described front end face and sidewall embed inside transformer, rear end cap covers mutually with the sealing of transformer core and folder, and described earth cable passes end cap from front end face.
2. the ground extractor for transformer core and folder according to claim 1, it is characterized in that, the position passing front end face at described earth cable is provided with water joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521030116.6U CN205211565U (en) | 2015-12-14 | 2015-12-14 | A ground connection extraction device for transformer core and folder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521030116.6U CN205211565U (en) | 2015-12-14 | 2015-12-14 | A ground connection extraction device for transformer core and folder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205211565U true CN205211565U (en) | 2016-05-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521030116.6U Active CN205211565U (en) | 2015-12-14 | 2015-12-14 | A ground connection extraction device for transformer core and folder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205211565U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172377A (en) * | 2016-12-08 | 2018-06-15 | 天威保变(合肥)变压器有限公司 | A kind of Transformer Core Grounding pin configuration |
-
2015
- 2015-12-14 CN CN201521030116.6U patent/CN205211565U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172377A (en) * | 2016-12-08 | 2018-06-15 | 天威保变(合肥)变压器有限公司 | A kind of Transformer Core Grounding pin configuration |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |