CN202678084U - Insulation sheath of current transformer - Google Patents
Insulation sheath of current transformer Download PDFInfo
- Publication number
- CN202678084U CN202678084U CN 201220126258 CN201220126258U CN202678084U CN 202678084 U CN202678084 U CN 202678084U CN 201220126258 CN201220126258 CN 201220126258 CN 201220126258 U CN201220126258 U CN 201220126258U CN 202678084 U CN202678084 U CN 202678084U
- Authority
- CN
- China
- Prior art keywords
- current transformer
- insulating sleeve
- cylinder
- insulation sheath
- metal shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009413 insulation Methods 0.000 title abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 238000004804 winding Methods 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 9
- 239000012792 core layer Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 239000000047 product Substances 0.000 description 9
- 229920002379 silicone rubber Polymers 0.000 description 7
- 238000009434 installation Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010068 moulding (rubber) Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides an insulation sheath of a current transformer. The current transformer comprises a body, wherein the body comprises a metal outer shell and a secondary winding arranged in the metal outer shell. The secondary winding comprises a copper varnished wire, an insulation belt and a ring iron core. Aluminum alloy is adopted to mold the metal outer shell in casting mode. The metal outer shell is coaxial with the insulation sheath, and the insulation sheath comprises a cylinder and umbrella skirt structures arranged on two sides of the cylinder. The cylinder is arranged between the metal outer shell and a busbar. The insulation sheath is scientific and reasonable in design, creative, stable in performance, reliable in operation, strong in practicability and advancement, convenient to assemble, simple in operation, and low in operation cost. The umbrella skirt structures increase a creep distance and improve electrical safety coefficient. The insulation sheath is separated from the body so as to bring convenience to assembly and replacement in the process of assembly and use of the current transformer. The insulation sheath is suitable for being applied to not only series compensation device but also partial application occasions with low voltage class in a power system.
Description
Technical field
The utility model belongs to the high voltage and insulation technology field, is specifically related to a kind of current transformer insulating sleeve.
Background technology
Bus-type current transformer generally is used for measuring the electrical system bus electric current, and bus passes from the center of current transformer.The general materials such as epoxy resin or silicon rubber that adopt wrap secondary winding on the structure, closely are attached on the current transformer body by cast or alternate manner, and epoxy resin or silicon rubber play the fixedly effect of secondary winding, play simultaneously insulating effect.But occur the product underproof situation that insulate in the production process, deal with pretty troublesomely, may need to destroy whole current transformer.
Mend in the engineering at string, the electric current of many places bus or line bank is used for the control protection that string is mended on the bus-type current transformer measurement series compensation platform, and little electric current and the fault current of the normal operation of requirement all will be measured accurately, and its operating mode and common instrument transformer have than big difference.The electromagnetic environment of instrument transformer operation is very complicated, and long-time running voltage is very low, and requires its lightning impulse tolerance level very high.If adopt existing bus-type current transformer, be difficult to satisfy performance requirement, in the situation that guarantees enough capability of electromagnetic shielding and insulation property, there is the larger problem of product size, structural design and layout to platform are made troubles, and the instrument transformer processing technology is complicated simultaneously, and rate of finished products is low.
The utility model content
In order to overcome above-mentioned the deficiencies in the prior art, the utility model provides a kind of current transformer insulating sleeve, insulating sleeve is coaxial with metal shell, insulating sleeve comprises cylinder and the umbrella skirt construction that is positioned at the cylinder both sides between metal shell and bus, the umbrella skirt construction of insulating sleeve has increased creepage distance, has improved the Electrical Safety coefficient; Insulating sleeve separates with body, is convenient to install and change in the installation and use procedure of current transformer; The utility model design science is reasonable, and is original, and stable performance is reliable, and operation cost is low, has stronger practicality and advance; Be not only applicable to series compensation device, be applicable to the application scenario of electric power system part low-voltage-grade yet.
To achieve these goals, the utility model is taked following technical scheme:
A kind of current transformer insulating sleeve, described current transformer comprises body, described body comprises metal shell and is fixed on the secondary winding of described metal shell inside, described secondary winding comprises copper enamelled wire, insulating tape and annular core, described metal shell is coaxial with insulating sleeve, described insulating sleeve comprises cylinder and the umbrella skirt construction that is positioned at described cylinder both sides, and described cylinder is between described metal shell and bus, and described umbrella skirt construction is 1～6 layer.The umbrella skirt construction of every side is take 2～3 layers as excellent.Described metal shell adopts the aluminium alloy casting moulding, and described insulating sleeve adopts the silicon rubber moulding by casting.
The full skirt inboard adjacent with described cylinder is arranged with the annulus of projection, and the number of described annulus is 1～2; Annulus is high to be 3～8mm.The thickness of described cylinder is 3～10mm, is generally 4～8mm.
Described current transformer also comprises secondary terminal box, and described secondary terminal box is arranged at a side of described metal shell bottom, and secondary wiring terminals is arranged in the described secondary terminal box.
1～10 layer in described copper enamelled wire is close on annular core, and interlayer makes the isolation of copper enamelled wire with insulating tape.
Compared with prior art, beneficial effect of the present invention is:
1. design science is reasonable, and is original, and stable performance is reliable, has stronger practicality and advance;
2. easy for installation, simple to operate, operation cost is low;
3. umbrella skirt construction has increased creepage distance, has improved the Electrical Safety coefficient;
4. insulating sleeve adopts moulding by casting silicon rubber, separates with body, can carry out separately quality control, so that product percent of pass improves greatly, and is convenient to install and change in the installation and use procedure of current transformer;
5. be widely used, be not only applicable to series compensation device, also be applicable to the application scenario of electric power system part low-voltage-grade.
Description of drawings
Fig. 1 is the front view of current transformer;
Fig. 2 is the left view of current transformer;
Fig. 3 is the cutaway view of current transformer insulating sleeve;
Wherein: 1. umbrella skirt construction, 2. annulus.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Such as Fig. 1-Fig. 3, a kind of current transformer insulating sleeve, described current transformer comprises body, described body comprises metal shell and is fixed on the secondary winding of described metal shell inside, described secondary winding comprises copper enamelled wire, insulating tape and annular core, described metal shell is coaxial with insulating sleeve, and described insulating sleeve comprises cylinder and the umbrella skirt construction that is positioned at described cylinder both sides, and described cylinder is between described metal shell and bus.Described metal shell adopts the aluminium alloy casting moulding, and described insulating sleeve adopts the silicon rubber moulding by casting to have good insulation property, and pliability is good, and production technology is simple, and rate of finished products is high.Described umbrella skirt construction is 1～6 layer.The umbrella skirt construction of every side take 2～3 layers as excellent, changes the arcing distance of bus-type current transformer and creepage distance and only need to change umbrella skirt construction and get final product, and the body of bus-type current transformer does not need change.
The full skirt inboard adjacent with described cylinder is arranged with the annulus of projection, and the number of described annulus is 1～2; The height of described annulus is 3～8mm.The thickness of described cylinder is 3～10mm, is generally 4～8mm.
Described metal shell both sides end face is respectively equipped with dismountable annular end cap, and described annular end cap and metal shell seal by sealing ring, the inner toroidal cavity that forms two symmetries.
Described sealing ring encircles side and forms 1mm～5mm slit of insulating in toroidal cavity, at described toroidal cavity remainder, described annular end cap and described metal shell fit tightly.The thickness of described metal shell is 5～40mm, take 5～20mm as excellent, both can guarantee that metal shell had enough mechanical strengths, can realize good capability of electromagnetic shielding again.
The number of described secondary winding is 2, is respectively equipped with described secondary winding in the toroidal cavity of described two symmetries, and described secondary winding and metal shell solidify out into one by epoxy resin.
Described current transformer also comprises secondary terminal box, and described secondary terminal box is arranged at a side of described metal shell bottom, and secondary wiring terminals is arranged in the described secondary terminal box.
1～10 layer in described copper enamelled wire is close on annular core, and interlayer makes the isolation of copper enamelled wire with insulating tape.
The utility model design science is reasonable, and is original, and stable performance is reliable, and is easy for installation, simple to operate, and operation cost is low, has stronger practicality and advance; Insulating sleeve adopts moulding by casting silicon rubber, separate with body, can carry out separately quality control, so that product percent of pass improves greatly, and be convenient in the installation and use procedure of current transformer, install and change, the umbrella skirt construction that arranges on the insulating sleeve has increased creepage distance, has improved the Electrical Safety coefficient; The utility model is widely used, and is not only applicable to series compensation device, also is applicable to the application scenario of electric power system part low-voltage-grade.
2004, the bus-type current transformer of being developed by China Electric Power Research Institute was applied to 220kV series compensation engineering, the beginning hanging net operation.In 2007, this product improved, and instrument transformer has before been simplified processing technology, has improved the rate of finished products of product, is widely applied at present.There are two independently secondary winding metal shell inside, and the body of current transformer and insulating sleeve adopt split-type structural, and be different from traditional bus-type current transformer.The shell of current transformer body adopts cast aluminium, Effective Raise the capability of electromagnetic shielding of current transformer; Insulating sleeve adopts moulding by casting silicon rubber, separates with body, is convenient to install and change in the installation and use procedure of current transformer.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (10)
1. current transformer insulating sleeve, described current transformer comprises body, described body comprises metal shell and is fixed on the secondary winding of described metal shell inside, described secondary winding comprises copper enamelled wire, insulating tape and annular core, it is characterized in that: described metal shell is coaxial with insulating sleeve, described insulating sleeve comprises cylinder and the umbrella skirt construction that is positioned at described cylinder both sides, and described cylinder is between described metal shell and bus, and described umbrella skirt construction is 1～6 layer.
2. current transformer insulating sleeve according to claim 1, it is characterized in that: the umbrella skirt construction of described every side is 2～3 layers.
3. current transformer insulating sleeve according to claim 1, it is characterized in that: the full skirt inboard adjacent with described cylinder is arranged with the annulus of projection.
4. current transformer insulating sleeve according to claim 3, it is characterized in that: the number of described annulus is 1～2.
5. current transformer insulating sleeve according to claim 4, it is characterized in that: the height of described annulus is 3～8mm.
6. current transformer insulating sleeve according to claim 1, it is characterized in that: the thickness of described cylinder is 3～10mm.
7. current transformer insulating sleeve according to claim 6, it is characterized in that: the thickness of described cylinder is 4～8mm.
8. current transformer insulating sleeve according to claim 1, it is characterized in that: described current transformer also comprises secondary terminal box, described secondary terminal box is arranged at a side of described metal shell bottom.
9. current transformer insulating sleeve according to claim 8, it is characterized in that: secondary wiring terminals is arranged in the described secondary terminal box.
10. current transformer insulating sleeve according to claim 1, it is characterized in that: 1～10 layer in described copper enamelled wire is close on annular core, and interlayer makes the isolation of copper enamelled wire with insulating tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220126258 CN202678084U (en) | 2012-03-29 | 2012-03-29 | Insulation sheath of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220126258 CN202678084U (en) | 2012-03-29 | 2012-03-29 | Insulation sheath of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202678084U true CN202678084U (en) | 2013-01-16 |
Family
ID=47498970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220126258 Expired - Lifetime CN202678084U (en) | 2012-03-29 | 2012-03-29 | Insulation sheath of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202678084U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110491657A (en) * | 2019-07-13 | 2019-11-22 | 安徽伊法拉电气有限公司 | A kind of new transformer insulating sheath |
-
2012
- 2012-03-29 CN CN 201220126258 patent/CN202678084U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110491657A (en) * | 2019-07-13 | 2019-11-22 | 安徽伊法拉电气有限公司 | A kind of new transformer insulating sheath |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140326 Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140326 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140326 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130116 |
|
| CX01 | Expiry of patent term |