CN205264483U - External current transformer - Google Patents
External current transformer Download PDFInfo
- Publication number
- CN205264483U CN205264483U CN201520995932.4U CN201520995932U CN205264483U CN 205264483 U CN205264483 U CN 205264483U CN 201520995932 U CN201520995932 U CN 201520995932U CN 205264483 U CN205264483 U CN 205264483U
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- CN
- China
- Prior art keywords
- coil
- assembling
- shell
- external current
- mutual inductor
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- Expired - Fee Related
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Abstract
The utility model provides an external current transformer, including the assembly of benzvalene form insulator, it is inside that the assembly of benzvalene form insulator is located to the conductor, and benzvalene form insulator assembly outside is equipped with the shell assembly, the coaxial shell assembly outside of locating of CT coil assembly, and the CT coil assembly outside is equipped with the ground plate. The utility model discloses a form of ring body, the external current transformerCT coil overlaps on a shielding section of thick bamboo, separates with the rubber cushions between CT coil and CT coil, the top of a set of CT coil in the top sets up rubber cushions, backing plate, the bottom of bottom a set of CT coil sets up rubber cushions, backing plate, rubber cushions, it is fixed firm with the CT coil with clamping ring, fastening bolt etc. Adorn the safety cover outward, form a whole back, wholly the equipment is on the outside piece of the shell that is equipped with a partial conductor again, and it is related that no longer direct and shell internal rigging takes place to can guarantee the wholeness of shell load module, also can make things convenient for maintenance, the maintenance in later stage simultaneously and guarantee insulating properties etc..
Description
Technical field
The utility model relates to high-voltage switch gear technical field, specifically relates to a kind of for gas-insulated metal-enclosedThe external current mutual inductor of switchgear.
Background technology
Current transformer is according to electromagnetic induction principle, is made up of closed iron core and winding. Its primary side aroundThe group number of turn is little, and in the circuit of the electric current that string is measured at needs, therefore it often has whole electric currents of circuit to flow through,Secondary side winding turn ratio is more, is serially connected in measuring instrument and protection loop; Current transformer is in when work,Its secondary side circuit is closed all the time, and therefore the impedance of measuring instrument and protection loop series coil is very little,The duty of current transformer approaches short circuit. Current transformer is to become secondary side little large primary side current conversionElectric current uses, and secondary side can not be opened a way.
At present, as assembly important in Cubicle Gas-Insulated Switchgear, in current transformer all adoptsPut formula, its CT (iron core) coil block is installed in the shell of sealing, associated with enclosure assembling generation,Easily cause maintenance, safeguard inconvenience and affect insulating properties etc.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of for Cubicle Gas-Insulated SwitchgearIn external current mutual inductor, it no longer directly occurs associatedly with enclosure assembling, overhaul, easy to maintenance,And can not affect insulating properties.
In order to solve the problems of the technologies described above, the technical solution of the utility model is to provide the mutual inductance of a kind of external electric currentDevice, is characterized in that: comprise disc insulator assembling, it is inner that conductor is located at disc insulator assembling, and benzvalene form is exhaustedEdge assembling outside is provided with shell assembling, and the assembling of CT coil is with being located in shell assembling outside, the assembling of CT coilOutside is provided with earth plate.
Preferably, described disc insulator assembling comprises disc insulator and contact base assembling; Described conductor is located atDisc insulator inside, described conductor two ends respectively with a contact base assembly connection, contact base is mounted with at basinOn formula insulator.
Preferably, the assembling of described shell comprise be located at described disc insulator assembling outside upper and lower part firstShell, second housing, separate by the first insulation board between the first shell, second housing.
Preferably, described the first shell, second housing and the first insulation board junction are provided with the first insulation sleeve.
Preferably, described CT coil assembling comprises the shielding cylinder of being located at described shell assembling outside, CT coilBe located at shielding cylinder outside and compress by pressure ring, protective cover is fixed on shielding cylinder and is positioned at CT coil outside.
Preferably, between adjacent described CT coil, separate with the first valve rubber respectively.
Preferably, the described CT coil upper surface of top is provided with the first valve rubber and the first backing plate; BottommostCT coil and shielding cylinder end face between be provided with the second backing plate, the second upper and lower both sides of backing plate are equipped with the second valve rubber.
Preferably, described pressure ring is fixed on shielding cylinder, is fixed with for by described CT coil on described pressure ringThe tight fixed bolt compressing.
Preferably, between described protective cover and shielding cylinder upper surface, be provided with the second insulation board, described protective cover,Two insulation boards and shielding cylinder junction are provided with the second insulation sleeve; Between the second insulation board and shielding cylinder, be provided with the 2nd OShape circle; Between protective cover and shielding cylinder lower end side, be provided with an O shape circle.
Preferably, on described the first shell and second housing, be respectively equipped with earthing block, between earthing block and earthing blockBy earth plate cross-over connection.
The device that the utility model provides has overcome the deficiencies in the prior art, by solid whole CT coil block assemblingFix on the piece of housing exterior, no longer directly associated with enclosure assembling generation, thus can ensure shell assemblingThe globality of module, also can facilitate maintenance, the maintenance in later stage simultaneously and ensure insulating properties etc.
Brief description of the drawings
The external current mutual inductor structural representation that Fig. 1 provides for the present embodiment.
Detailed description of the invention
Below in conjunction with specific embodiment, further set forth the utility model. Should be understood that these embodiment only forThe utility model is described and is not used in restriction scope of the present utility model. In addition should be understood that and reading this practicalityAfter the content of novel instruction, those skilled in the art can make various changes or modifications the utility model, thisA little equivalent form of values fall within the application's appended claims limited range equally.
The external current mutual inductor structural representation that Fig. 1 provides for the present embodiment, described external electric current is mutualSensor is assembled 6, is led by disc insulator assembling 1, shell assembling 3, earth plate 5, CT (iron core) coilBody 20 compositions such as grade, conductor 20 is located at disc insulator and is assembled 1 inside, and disc insulator assembles 1 outside and is provided withShell assembling 3, CT coil assembling 6 is assembled 3 outsides with being located in shell, and CT coil assembles 6 outsides and is provided withEarth plate 5.
Wherein:
Disc insulator assembling 1 comprises: disc insulator 2, contact base assembling 19. Conductor 20 is located at benzvalene formInsulator 2 inside, conductor 20 two ends are connected with a contact base assembling 19 respectively, and contact base assembling 19 is fixingOn disc insulator 2.
Shell assembling 3 comprises: the first shell 4, second housing 18, the first insulation board 21, the first insulation sleeve22. The first shell 4, second housing 18 are located at respectively the upper and lower part in disc insulator 2 outsides, outside firstBetween shell 4, second housing 18, separate with the first insulation board 21; Disc insulator assembling 1 is fixed on outside firstOn shell 4 flanges, the first insulation board 21 is loaded on second housing 18 flanges, the first shell 4 and the first insulation board21 and second housing 18 flanges docking fixing, fix the first shell 4, the first insulation board 21 and second housingThe bolt of 18 flanges, pad place are equiped with the first insulation sleeve 22.
CT coil assembling 6 comprises: protective cover 7, pressure ring 8, the first backing plate 9, the first valve rubber 10, firstCT coil 11, the 2nd CT coil 12, the 3rd CT coil 13, the 4th CT coil 14 (coil actual numberAmount determines according to engine request, and the present embodiment is taking 4 coils as example), the second valve rubber 15, the second backing plate 16,The one O shape circle 17, tight fixed bolt 23, pad 24, nut 25, shielding cylinder 26, the 2nd O shape circle 27,The second insulation board 28, the second insulation sleeve 29.
One second valve rubber 15, the second backing plate 16, another second valve rubber 15 are loaded on to shielding cylinder 26 successivelyOn end face, be respectively charged into the 4th CT coil 14, the 3rd CT coil 13, the 2nd CT coil of different parameters12, CT coil 11, the four CT coils 14 and the 3rd CT coil 13, the three CT coils 13 withBetween the 2nd CT coil 12, the two CT coils 12 and a CT coil 11, use respectively the first valve rubber 10Separate, CT coil 11 upper surfaces are equiped with the first valve rubber 10 and the first backing plate 9, tight fixed bolt 23Be fixed on pressure ring 8, pressure ring 8 entirety are fixed on shielding cylinder 26, adjust tight fixed bolt 23, pad 24And nut 25 positions are by a CT coil 11, the 2nd CT coil 12, the 3rd CT coil 13, the 4th CTCoil 14 compresses. Protective cover 7 is fixed on shielding cylinder 26 and is positioned at all CT coils outside, protective cover 7And between shielding cylinder 26 upper surfaces, be equiped with the second insulation board 28, with bolt, pad by protective cover 7, secondInsulation board 28 is fastening with shielding cylinder 26, and bolt, pad place are equiped with the second insulation sleeve 29, the second insulation boards28 and shielding cylinder 26 between be provided with the 2nd O shape and enclose 27 hermetically-sealed constructions; Protective cover 7 and shielding cylinder 26 lower end sideBetween face, be provided with an O shape and enclose 17 hermetically-sealed constructions.
Whole CT coil assembling 6 has adopted the form of ring body to be fixed on the piece of second housing 18 outsides.
On the first shell 4 and second housing 18, be respectively equipped with earthing block, between earthing block and earthing block, use ground connectionPlate 5 cross-over connections.
Claims (10)
1. an external current mutual inductor, is characterized in that: comprise disc insulator assembling (1), conductor (20)Be located at disc insulator assembling (1) inside, disc insulator assembling (1) outside is provided with shell assembling (3),CT coil assembling (6) is with being located in shell assembling (3) outside, and CT coil assembling (6) outside is provided with and connectsFloor (5).
2. a kind of external current mutual inductor as claimed in claim 1, is characterized in that: described disc insulatorAssembling (1) comprises disc insulator (2) and contact base assembling (19); Described conductor (20) is located at benzvalene formInsulator (2) inside, described conductor (20) two ends are connected with a contact base assembling (19) respectively, contactSeat assembling (19) is fixed on disc insulator (2).
3. a kind of external current mutual inductor as claimed in claim 1, is characterized in that: described shell assembling (3)Comprise the first shell (4), the second housing of the upper and lower part of being located at described disc insulator assembling (1) outside(18), between the first shell (4), second housing (18), separate by the first insulation board (21).
4. a kind of external current mutual inductor as claimed in claim 3, is characterized in that: described the first shell (4),Second housing (18) and the first insulation board (21) junction are provided with the first insulation sleeve (22).
5. a kind of external current mutual inductor as claimed in claim 1, is characterized in that: described CT coil dressJoin (6) and comprise the shielding cylinder (26) of being located at described shell assembling (3) outside, CT coil is located at shielding cylinder (26)Outside also compresses by pressure ring (8), and protective cover (7) is fixed on shielding cylinder (26) above and is positioned at CT coilOutside.
6. a kind of external current mutual inductor as claimed in claim 1, is characterized in that: adjacent described CT lineBetween circle, use respectively the first valve rubber (10) to separate.
7. a kind of external current mutual inductor as described in claim 5 or 6, is characterized in that: the institute of topState CT coil upper surface and be provided with the first valve rubber (10) and the first backing plate (9); The CT coil of bottommost withBetween shielding cylinder (26) end face, be provided with the second backing plate (16), the upper and lower both sides of the second backing plate (16) are equipped with secondValve rubber (15).
8. a kind of external current mutual inductor as claimed in claim 5, is characterized in that: described pressure ring (8)Be fixed on shielding cylinder (26) upper, on described pressure ring (8), be fixed with tight for what described CT coil was compressedDetermine bolt (23).
9. a kind of external current mutual inductor as claimed in claim 5, is characterized in that: described protective cover (7)And shielding cylinder (26) is provided with the second insulation board (28) between upper surface, described protective cover (7), the second insulationPlate (28) is provided with the second insulation sleeve (29) with shielding cylinder (26) junction; The second insulation board (28) and screenCover cylinder and be provided with the 2nd O shape circle (27) between (26); Protective cover (7) and shielding cylinder (26) lower end sideBetween be provided with an O shape circle (17).
10. a kind of external current mutual inductor as claimed in claim 1, is characterized in that: described the first shell (4)And on second housing (18), be respectively equipped with earthing block, between earthing block and earthing block by earth plate (5) acrossConnect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995932.4U CN205264483U (en) | 2015-12-03 | 2015-12-03 | External current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995932.4U CN205264483U (en) | 2015-12-03 | 2015-12-03 | External current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205264483U true CN205264483U (en) | 2016-05-25 |
Family
ID=56005999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520995932.4U Expired - Fee Related CN205264483U (en) | 2015-12-03 | 2015-12-03 | External current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205264483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355405A (en) * | 2015-12-03 | 2016-02-24 | 正泰电气股份有限公司 | External current transformer |
| CN106960722A (en) * | 2017-05-02 | 2017-07-18 | 华建电气有限公司 | Straight-through current transformer |
-
2015
- 2015-12-03 CN CN201520995932.4U patent/CN205264483U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105355405A (en) * | 2015-12-03 | 2016-02-24 | 正泰电气股份有限公司 | External current transformer |
| CN106960722A (en) * | 2017-05-02 | 2017-07-18 | 华建电气有限公司 | Straight-through current 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20181203 |