CN201522931U - Foul resisting current transformer applicable to plateaus - Google Patents
Foul resisting current transformer applicable to plateaus Download PDFInfo
- Publication number
- CN201522931U CN201522931U CN2009202204012U CN200920220401U CN201522931U CN 201522931 U CN201522931 U CN 201522931U CN 2009202204012 U CN2009202204012 U CN 2009202204012U CN 200920220401 U CN200920220401 U CN 200920220401U CN 201522931 U CN201522931 U CN 201522931U
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- iron core
- winding
- coil
- current transformer
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Abstract
The utility model discloses a foul resisting current transformer applicable to plateaus. The transformer comprises an iron core, a secondary winding and a primary winding, wherein the iron core is formed by splicing an iron core for measurement and an iron core for protection, and an insulation board is clamped between the two parts of the iron core; the secondary winding is made up of a measuring coil and a protecting coil, the measuring coil is wound on the iron core for measurement, the protecting coil is wound on the iron core for protection, and an insulation layer is arranged between the measuring coil and the protecting coil; the wound part of the primary winding penetrates through the two parts of iron core and is coupled with the measuring coil and the protecting coil of the secondary winding; the iron core, the primary winding, and the measuring coil and the protecting coil of the secondary winding are all sealed in a pouring body formed through epoxy resin vacuum pouring, the lead wires of the primary winding and the secondary winding are in electrical connection with a connecting terminal arranged on the surface of the pouring body. Through the arrangement of the insulation board and the insulation layer at the interior of the transformer, the eddy loss of the iron core is reduced, insulation is enabled to be produced between the two coils of the secondary winding, and the service life of the product is prolonged.
Description
Technical field
The utility model relates to the electrical installation that is used for distribution line, particularly relates to a kind of dirty current transformer of resistant that is applicable to the plateau.
Background technology
Current transformer generally is used in the power network line, as measuring electric energy or protection equipment.The insulation of the current transformer below the 35kv at present has following several mode: gas-insulated, oil immersed type insulation; Wherein, gas-insulated is that employing inflation mode is carried out the insulation between inner each parts of instrument transformer, and the oil immersed type insulation is the insulation between inner each parts of oil-filled realization instrument transformer in instrument transformer, inflation, oil-filled insulation mode are revealed easily, pollute the also easy initiation fire of oil-filled insulation, for guaranteeing safe operation, must test instrument transformer and detect maintenance every year, and maintenance is big, the expense height.
The utility model content
Based on above-mentioned existing in prior technology problem, the utility model embodiment provides a kind of dirty current transformer of resistant that is applicable to the plateau, its need not be oil-filled or inflation insulate, good insulation preformance and fouling resistance rating height, non-maintaining, reliability is high.
The utility model is achieved through the following technical solutions:
The utility model embodiment provides a kind of dirty current transformer of resistant that is applicable to the plateau, comprising:
Iron core, insulation board, secondary winding, insulating barrier, winding and binding post;
Described iron core is put together by measuring level iron core and protected level iron core two parts, accompanies insulation board between two parts iron core; Secondary winding is measured coil and is wound on the measurement level iron core by measuring coil and protecting coil to constitute, and the protection coil is wound on the protected level iron core, is provided with insulating barrier between measurement coil and the protection coil; The part of a winding technique is passed two parts iron core, is of coupled connections through the exciting current that one time winding produced and the measurement coil and the protection coil of secondary winding by two parts iron core; The measurement coil of iron core, winding and secondary winding all is enclosed in the pour mass of formation by the epoxide resin vacuum cast with the protection coil, and the measurement coil of winding and secondary winding and the lead-out wire of protection coil are electrically connected with the binding post of pour mass surface setting respectively.
By above-mentioned embodiment of the present utility model as can be seen, establish insulation board by folder between two parts of iron core in the utility model embodiment, reduced iron core eddy current loss, make iron core reduce heating, the life-span that can improve product can reach more than 5 years.In addition in pour mass inside, folder is established insulating barrier between the measurement coil of secondary winding and the protection coil, can produce to insulate the useful life of having improved product between the measurement coil of secondary winding and protection coil.Because the setting of insulating barrier and insulation board, well insulated in instrument transformer inside, making each parts of this instrument transformer to be enclosed in by the mode of epoxide resin vacuum cast to form in the pour mass need not be oil-filled or dry-type current transformer that inflation is insulated, it is non-maintaining to make this instrument transformer not only can realize, and dependable performance is specially adapted to the high areas of gradation for surface pollution such as plateau.
Description of drawings
The structural representation of the dry-type current transformer that Fig. 1 provides for the utility model embodiment;
The end view of the dry-type current transformer that Fig. 2 provides for the utility model embodiment;
The schematic bottom view of the dry-type current transformer that Fig. 3 provides for the utility model embodiment;
Each label is among the figure:
1. primary connection copper bar; 2. connecting plate; 3. pour mass; 4. winding; 5. measurement coil; 6. insulating barrier; 7. protection coil; 8. installation inserts; 9. secondary connection platform; 10. umbrella skirt construction.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment
Present embodiment provides a kind of dirty current transformer of resistant that is applicable to the plateau, can be used in the 35KV power circuit as the equipment of measuring electric energy or used for relay protection, and shown in Fig. 1～3, this instrument transformer comprises:
Iron core, insulation board, secondary winding, insulating barrier 6, a winding and a binding post;
Wherein, described iron core is put together by measuring level iron core and protected level iron core two parts, accompanies insulation board between two parts iron core, and insulation board can adopt insulating board; Secondary winding is measured coil 5 and is wound on the measurement level iron core by measuring coil 5 and protecting coil 7 to constitute, and protection coil 7 is wound on the protected level iron core, is provided with insulating barrier 6 between measurement coil 5 and the protection coil 7, and insulating barrier 6 can adopt two composite-insulating papers; The part of winding 4 coilings is passed two parts iron core, and the exciting current that is produced through winding 4 by iron core and the measurement coil 5 and the protection coil 7 of secondary winding are of coupled connections; The measurement coil 5 of iron core, winding 4 and secondary winding all is enclosed in the pour mass 3 of formation by the epoxide resin vacuum cast with protection coil 7, one time winding 4 is electrically connected with the binding post that the pour mass surface is provided with respectively with the measurement coil 5 of secondary winding and the lead-out wire of protection coil 7, binding post is divided into primary connection terminal and secondary connection terminal, and the lead-out wire of a winding and primary connection terminal are electrically connected; The lead-out wire of the measurement coil 5 of secondary winding and protection coil 7 is electrically connected with each terminal of secondary connection terminal respectively; Wherein, the coiler part of a winding 4 can adopt copper strips, the primary connection terminal corresponding with winding can adopt and once connect copper bar 1, the lead-out wire of a winding 4 through connecting plate 2 with once be connected copper bar 1 and connect, wherein, the lead-out wire of a winding 4 and connecting plate 2 and all connect mode and be welded to connect by brazing as the junction between the copper bar 1 of once being connected of primary connection terminal.
The profile cast of above-mentioned pour mass 3 becomes the umbrella skirt construction 10 of multilayer, has improved external insulation flashover voltage and puncture voltage, can use in the place of high height above sea level.This instrument transformer also comprises the construction bolt hole, and described construction bolt hole is arranged on pour mass bottom, the installation when being beneficial to whole instrument transformer and using.
In the above-mentioned instrument transformer, the outermost layer of winding wrapping has semiconductive paper, is provided with the shielding copper mesh at following one deck of semiconductive paper.
Described secondary connection terminal is arranged on the secondary connection platform 9, and secondary connection platform 9 parts are arranged in the pour mass 3, and terminals are exposed at outward outside the pour mass 3, is convenient to wiring.
Be further described in detail below in conjunction with 1～3 pair of above-mentioned dry-type current transformer of accompanying drawing:
This dry-type current transformer is by iron core, winding 4 (forming by the primary connection copper bar of illustrating among Fig. 11, connecting plate 2 with as the copper strips of primary winding coils), secondary winding (being made up of measurement coil of illustrating among Fig. 15 and protection coil 7); A winding 4 all is wound on secondary winding and forms the current transformer body on the iron core, forms totally enclosed pour mass 3 by epoxide resin vacuum cast back, and each parts all is arranged in the pour mass 3; In pour mass 3 inside, pressed from both sides two composite-insulating papers as insulating barrier 6 between the measurement coil 5 of secondary winding and the protection coil 7, this insulation mode, main advantage is to produce insulation, the useful life of having improved product between two coils of secondary winding.
And; establish insulating board measuring according to two parts iron core of iron core to press from both sides between level iron core and the protected level iron core; play the eddy current loss that has reduced between two parts iron core that constitutes iron core, make iron core reduce heating, the life-span that this new-type insulation of actual test shows can improve product can reach more than 5 years.
In practice; difference according to design instrument transformer capacity; sometimes the protected level iron core is because volume is bigger; also can adopt two parts iron core to be put together; insulating board is established in also pressing from both sides between two parts iron core of amalgamation formation protected level iron core like this; also can play the eddy current loss between two parts iron core that has reduced the protected level iron core, make iron core reduce heating, the life-span that this new-type insulation of actual test shows can improve product can reach more than 5 years.
For primary connection copper bar in each parts of forming a winding 1 and connecting plate 2, and connecting plate 2 all connects with brazing in succession with copper strips as a winding 4, this mode is compared the mode that adopts bolt to confine and is connected, its benefit is solid and reliable, reduced resistance, reduced the percentage of exciting curent, made winding and secondary winding can better realize the conversion of electricity-magnetic-electricity.
Winding and secondary winding wrapping method all employing office are put the wrapping method, specifically: the outermost layer at a winding is pricked with the semiconductive paper bag, wrap up at the inner shielding copper mesh that adopts of semiconductive paper, the method helps the level that raising office puts, and improves the useful life of whole instrument transformer product.
In this current transformer, also be provided with four inserts 8 (nut being installed as adopting) is installed, each installs also firm being cast in the pour mass of inserts 8, the opening that inserts 8 is installed is located at pour mass 3 bottoms, when being convenient to install the pour mass of this instrument transformer solid and reliable (referring to Fig. 1).
In this current transformer, the secondary connection terminal that secondary connection platform 9 is used for being provided with secondary winding is set also, secondary connection platform 9 parts are cast in the pour mass 3, a part is exposed at outside the pour mass 3, the part that exposes makes things convenient for wiring, can get by no-load voltage ratio during use different, flexibly wiring (referring to Fig. 2).
The main insulation of the current transformer among the utility model embodiment adopts poured with epoxy resin to form, the dielectric strength height, insulating resin solidifies back mechanical strength height, both satisfied the electrical insulation properties requirement, can bear mechanical load again, external insulation full skirt and body be moulding by casting together, and be simple in structure, be easy to make the reliability height; And the outward appearance of pour mass can moulding by casting be a umbrella skirt construction, has improved external insulation flashover voltage and puncture voltage, can use in the place of high height above sea level, and use in the high area of gradation for surface pollution such as plateau that is particularly suitable for high height above sea level.
In sum, dry-type current transformer among the utility model embodiment need not be oil-filled or the mode of inflation, promptly realized good insulation, form a kind of dry-type current transformer, this current transformer has little, the conserve space of volume, the characteristics non-maintaining and use cost is low can economize on resources, and have good environment protecting.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (9)
1. the dirty current transformer of resistant that is applicable to the plateau is characterized in that, comprising:
Iron core, insulation board, secondary winding, insulating barrier, winding and binding post;
Described iron core is put together by measuring level iron core and protected level iron core two parts, accompanies insulation board between two parts iron core; Secondary winding is measured coil and is wound on the measurement level iron core by measuring coil and protecting coil to constitute, and the protection coil is wound on the protected level iron core, is provided with insulating barrier between measurement coil and the protection coil; The part of a winding technique is passed two parts iron core, is of coupled connections through the exciting current that one time winding produced and the measurement coil and the protection coil of secondary winding by two parts iron core; The measurement coil of iron core, winding and secondary winding all is enclosed in the pour mass of formation by the epoxide resin vacuum cast with the protection coil, and the measurement coil of winding and secondary winding and the lead-out wire of protection coil are electrically connected with the binding post of pour mass surface setting respectively.
2. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1 is characterized in that described insulating barrier is two composite-insulating papers.
3. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1 is characterized in that, described insulation board adopts insulating board.
4. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1, it is characterized in that, a described winding is a copper strips, and the binding post corresponding with the lead-out wire of a winding is the primary connection copper bar, and the lead-out wire of a winding is welded to connect through connecting plate and primary connection copper bar.
5. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1 is characterized in that, the outermost layer wrapping of a described winding has semiconductive paper.
6. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 5 is characterized in that, is provided with the shielding copper mesh in the described semiconductive paper.
7. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1 is characterized in that the profile of described pour mass is cast for the multilayer umbrella skirt construction.
8. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 7 is characterized in that described binding post is arranged on the secondary connection platform, and described secondary connection platform partly is arranged in the pour mass.
9. the dirty current transformer of resistant that is applicable to the plateau as claimed in claim 1 is characterized in that described instrument transformer also comprises the installation inserts, and described installation inserts is arranged in the pour mass, and the bottom that the inserts opening is arranged on pour mass is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202204012U CN201522931U (en) | 2009-10-28 | 2009-10-28 | Foul resisting current transformer applicable to plateaus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202204012U CN201522931U (en) | 2009-10-28 | 2009-10-28 | Foul resisting current transformer applicable to plateaus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522931U true CN201522931U (en) | 2010-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202204012U Expired - Fee Related CN201522931U (en) | 2009-10-28 | 2009-10-28 | Foul resisting current transformer applicable to plateaus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201522931U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005293A (en) * | 2010-11-09 | 2011-04-06 | 大连华亿电力电器有限公司 | Current transformer |
| CN102468046A (en) * | 2010-11-15 | 2012-05-23 | 大连华亿电力电器有限公司 | Small-size current transformer |
| CN107123518A (en) * | 2017-06-23 | 2017-09-01 | 太仓市变压器有限公司 | A kind of stable type magnetic core of transformer |
| CN107424771A (en) * | 2017-07-05 | 2017-12-01 | 太仓英达锅炉设备有限公司 | A kind of stability magnetic core of transformer |
| CN107424770A (en) * | 2017-06-23 | 2017-12-01 | 太仓市变压器有限公司 | A kind of core assembly |
-
2009
- 2009-10-28 CN CN2009202204012U patent/CN201522931U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005293A (en) * | 2010-11-09 | 2011-04-06 | 大连华亿电力电器有限公司 | Current transformer |
| CN102468046A (en) * | 2010-11-15 | 2012-05-23 | 大连华亿电力电器有限公司 | Small-size current transformer |
| CN107123518A (en) * | 2017-06-23 | 2017-09-01 | 太仓市变压器有限公司 | A kind of stable type magnetic core of transformer |
| CN107424770A (en) * | 2017-06-23 | 2017-12-01 | 太仓市变压器有限公司 | A kind of core assembly |
| CN107424771A (en) * | 2017-07-05 | 2017-12-01 | 太仓英达锅炉设备有限公司 | A kind of stability magnetic core of transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20141028 |
|
| EXPY | Termination of patent right or utility model | ||
| C49 | Reinstatement of patent right or utility model | ||
| RR01 | Reinstatement of patent right |
Former decision: cessation of patent right due to non-payment of the annual fee Former decision publication date: 20160113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100707 Termination date: 20161028 |