CN209843481U - Multi-turn link type sulfur hexafluoride gas insulation current transformer - Google Patents
Multi-turn link type sulfur hexafluoride gas insulation current transformer Download PDFInfo
- Publication number
- CN209843481U CN209843481U CN201921111793.9U CN201921111793U CN209843481U CN 209843481 U CN209843481 U CN 209843481U CN 201921111793 U CN201921111793 U CN 201921111793U CN 209843481 U CN209843481 U CN 209843481U
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- CN
- China
- Prior art keywords
- shell
- flange
- current transformer
- sulfur hexafluoride
- hexafluoride gas
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- 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 - Fee Related
Links
- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 25
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 22
- 238000009413 insulation Methods 0.000 title claims abstract description 9
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000012212 insulator Substances 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 19
- 230000007547 defect Effects 0.000 description 2
- 238000009421 internal insulation Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model relates to a mutual-inductor, concretely relates to multiturn link formula sulfur hexafluoride gas insulation current transformer belongs to current transformer technical field. The device comprises a shell, wherein a device body is arranged in the center of the interior of the shell, and a primary connecting rod is axially arranged in the center of the interior of the device body in a penetrating manner; one end of the primary link rod penetrates through the device body, is fixed on the outer wall of one side of the shell through a bolt, and the other end of the primary link rod penetrates through the device body and is fixedly connected to the outer wall of the other side of the shell through a bolt; the lower parts of the two sides of the shell, which are positioned at the positions where the primary link rods extend out of the shell, are respectively provided with a primary terminal; the bottom of the body is provided with a lead tube, one end of the lead tube is arranged in the shell and connected to the body, and the other end of the lead tube extends out of the shell and is mounted on the base and grounded; a porcelain bushing is arranged outside the lead tube, and the bottom of the porcelain bushing is connected to the base; the insulating device has the advantages of good insulating property, simple and feasible structure, strong part processability, convenience in assembly, reduction in production cost, reliable working performance and the like.
Description
Technical Field
The utility model relates to a mutual-inductor, concretely relates to multiturn link formula sulfur hexafluoride gas insulation current transformer belongs to current transformer technical field.
Background
The sulfur hexafluoride gas insulation current transformer operating in an electric power system mostly adopts a structure with a supporting insulator, due to the structure, most of secondary part grounding is grounded by using a lead, the short circuit resistance of the cross section is only 4mm2-6mm2, and the damage to secondary equipment after the internal short circuit of a product cannot be guaranteed. The current transformer with diversified protection requirements usually needs a plurality of secondary windings, the accuracy is difficult to ensure due to the number of primary turns, and the cost is usually greatly increased due to the volume.
Disclosure of Invention
In view of the above technical defects, the present invention provides a multi-turn link type sulfur hexafluoride gas-insulated current transformer, which has good insulation performance, is an SF6 gas-insulated current transformer with simple and easy structure, and has pure SF6 gas as main insulation; and meanwhile, the spring contact fingers are adopted, so that the damage of the internal short circuit of the product to secondary equipment can be avoided.
In view of the above technical defect, the utility model discloses the technical scheme who adopts is: the multi-turn link type sulfur hexafluoride gas insulation current transformer comprises a shell, wherein a transformer body is arranged in the center of the interior of the shell, and a primary link rod axially penetrates through the center of the interior of the transformer body; one end of the primary link rod penetrates through the device body, is fixed on the outer wall of one side of the shell through a bolt, and the other end of the primary link rod penetrates through the device body and is fixedly connected to the outer wall of the other side of the shell through a bolt; the lower parts of the two sides of the shell, which are positioned at the positions where the primary link rods extend out of the shell, are respectively provided with a primary terminal; the bottom of the body is provided with a lead tube, one end of the lead tube is arranged in the shell and connected to the body, and the other end of the lead tube extends out of the shell and is mounted on the base and grounded; a porcelain bushing is arranged outside the lead tube, and the bottom of the porcelain bushing is connected to the base;
the top end of the porcelain bushing is annularly provided with a supporting flange, and the porcelain bushing and the supporting flange are fixed on the shell through bolts;
a closed cavity is formed between the shell and the porcelain bushing, and sulfur hexafluoride gas is filled in the closed cavity;
and a supporting insulator is arranged between the bottom of the device body and the bottom of the shell, and the supporting insulator is annularly arranged outside the lead tube.
The top end of the supporting insulator is provided with a supporting insulator flange, the top end of the supporting insulator is connected to a supporting insulator insulating flange through a bolt, the upper part of the supporting insulator flange is provided with a body flange, the supporting insulator flange is connected to the body flange through a bolt, the bottom of the supporting insulator is connected to a shell flange through a bolt, and the shell flange is fixed on the shell through a bolt;
a shielding sleeve is also arranged between the lead tube at the lower part of the shell and the porcelain sleeve;
the lead tube not only has the function of a lead, but also can be used as a support for the body in the shell;
the porcelain bushing is fixed on the base through the fastening ring;
the top of the shell is provided with an explosion-proof sheet, and an IP55 outlet box is also arranged on the base;
furthermore, in order to prevent secondary equipment from being damaged after internal short circuit, a spring contact finger is arranged between the support insulator flange and the lead pipe;
the spring contact finger ring is arranged outside the lead pipe and embedded in a groove arranged on a support insulator flange;
a primary winding and a secondary winding are arranged inside the shell; the primary winding comprises a link and a primary terminal, and current enters from the primary terminal P1 and passes through the primary link to reach the primary terminal P2; the secondary winding is formed by winding a coil on the transformer body, and the leading-out wire of the coil extends to the end part of the secondary terminal through a lead tube; the primary winding penetrates through the center of the secondary winding, and the secondary winding is sleeved on the outer side of the primary sleeve; when the internal insulation of the product fails, the primary link rod discharges electricity to the transformer body, and the discharge current leads the spring contact finger to the ground finally through the lead tube by the mounting flange of the transformer body.
The utility model discloses current transformer's principle utilizes the spring to touch the super high conducting capacity who indicates when the inside short circuit of casing and causes the earth with short-circuit current to guarantee secondary equipment and once high voltage isolation.
The link rod has the capability of meeting various current requirements and meeting the short-circuit current of a power grid by realizing a multi-turn structure once. On the primary winding multi-link structure, the shell and the supporting flange, the secondary winding and the supporting pipe are insulated from the high-voltage end through sulfur hexafluoride gas. Due to the adoption of the structure of the supporting tube, the main insulating medium is completely changed into SF6 gas, the condition of poor insulating property of the transformer caused by other media is avoided, and the insulating level of the transformer is improved.
The base adopts the whole fretwork of extension board structure to reduce the area of facing the wind, increases factor of safety.
The IP55 outlet box prevents small animals, rain, snow, wind and sand from invading and meets the anti-pollution level IP 55.
Compared with the prior art, the utility model: the insulating device has the advantages of good insulating property, simple and feasible structure, strong part processability, convenience in assembly, reduction in production cost, reliable working performance and the like.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a in fig. 1.
In the figure, 1, an explosion-proof sheet, 2, a body, 3, a primary link rod, 4, a primary terminal, 5, a spring contact, 6, a support insulator, 7, a shell, 8, a porcelain sleeve, 9, a shielding cylinder, 10, sulfur hexafluoride gas, 11, an IP55 outlet box, 13, a base, 14 and a lead pipe.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the multi-turn link type sulfur hexafluoride gas insulated current transformer comprises a shell 7, a transformer body 2 is arranged at the center inside the shell 7, and a primary link 3 is axially arranged at the center inside the transformer body 2 in a penetrating manner; one end of the primary link rod 3 penetrates through one end of the transformer body 2 and is fixed on the outer wall of one side of the shell 7 through a bolt, and the other end of the primary link rod 3 penetrates through the other end of the transformer body 2 and is fixedly connected to the outer wall of the other side of the shell 7 through a bolt; the lower parts of the two sides of the shell 7, which are positioned at the positions where the primary connecting rods 3 extend out of the shell 7, are respectively provided with a primary terminal 4; a lead tube 14 is arranged at the bottom of the body 2, one end of the lead tube 14 is arranged in the shell 7 and connected to the body 2, and the other end of the lead tube 14 extends out of the shell 7, is mounted on the base 13 and is grounded; a porcelain bushing 8 is arranged outside the lead tube 14, and the bottom of the porcelain bushing 8 is connected to the base 13;
a supporting flange is annularly arranged at the top end of the porcelain bushing 8, and the porcelain bushing 8 and the supporting flange are fixed on the shell 7 through bolts;
a closed cavity is formed between the shell 7 and the porcelain bushing 8, and sulfur hexafluoride gas 10 is filled in the closed cavity;
a supporting insulator 6 is arranged between the bottom of the device body 2 and the bottom of the shell 7, and the supporting insulator 6 is arranged outside the lead tube 14 in a surrounding manner;
a supporting insulator flange is arranged at the top end of the supporting insulator 6, the top end of the supporting insulator is connected to a supporting insulator insulating flange through a bolt, a body flange is arranged at the upper part of the supporting insulator flange, the supporting insulator flange is connected to the body flange through a bolt, the bottom of the supporting insulator 6 is connected to a shell flange through a bolt, and the shell flange is fixed on the shell 7 through a bolt;
a shielding sleeve 9 is also arranged between the lead tube 14 at the lower part of the shell and the porcelain sleeve 8;
the lead tube 14 not only has the function of a lead, but also can be used for supporting the body 2 in the shell;
the porcelain bushing 8 is fixed on the base 13 through a fastening ring;
the top of the shell 7 is provided with an explosion-proof sheet 1, and an IP55 outlet box 11 is also arranged on the base 13;
further, in order to prevent the secondary equipment from being damaged after the internal short circuit, a spring contact finger 5 is arranged between the support insulator flange and the lead pipe 14;
the spring contact finger 5 is annularly arranged outside the lead tube 14 and embedded in a groove arranged on a support insulator flange;
a primary winding and a secondary winding are arranged inside the shell 7; the primary winding comprises a link 3 and a primary terminal 4, current enters from a primary terminal P1, passes through the primary link 3 and reaches a primary terminal P2; the secondary winding is formed by winding a coil on the body 2, and the leading-out wire of the coil extends to the end part of the secondary terminal through the lead tube 14; the primary winding penetrates through the center of the secondary winding, and the secondary winding is sleeved on the outer side of the primary sleeve; when the internal insulation of the product fails, the primary connecting rod 3 discharges to the transformer body 2, and the discharge current leads to the spring contact 5 through the transformer body mounting flange and finally leads to the ground through the lead tube 14.
The utility model discloses current transformer's principle utilizes the super high conducting capacity of short circuit contact to cause the earth with short circuit current when the inside short circuit of casing to guarantee secondary equipment and once high voltage isolation.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (9)
1. The multi-turn link type sulfur hexafluoride gas insulation current transformer is characterized in that: the device comprises a shell, wherein a device body is arranged in the center of the interior of the shell, and a primary connecting rod is axially arranged in the center of the interior of the device body in a penetrating manner; one end of the primary link rod penetrates through the device body, is fixed on the outer wall of one side of the shell through a bolt, and the other end of the primary link rod penetrates through the device body and is fixedly connected to the outer wall of the other side of the shell through a bolt; the lower parts of the two sides of the shell, which are positioned at the positions where the primary link rods extend out of the shell, are respectively provided with a primary terminal; the bottom of the body is provided with a lead tube, one end of the lead tube is arranged in the shell and connected to the body, and the other end of the lead tube extends out of the shell and is mounted on the base and grounded; the lead tube is externally provided with a porcelain bushing, and the bottom of the porcelain bushing is connected to the base.
2. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 1, wherein: and a supporting flange is annularly arranged at the top end of the porcelain bushing, and the porcelain bushing and the supporting flange are fixed on the shell through bolts.
3. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 2, wherein: a closed cavity is formed between the shell and the porcelain bushing, and sulfur hexafluoride gas is filled in the closed cavity.
4. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 1, wherein: and a supporting insulator is arranged between the bottom of the device body and the bottom of the shell, and the supporting insulator is annularly arranged outside the lead tube.
5. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 4, wherein: the supporting insulator is characterized in that a supporting insulator flange is arranged at the top end of the supporting insulator, the top end of the supporting insulator is connected to a supporting insulator insulating flange through a bolt, a body flange is arranged on the upper portion of the supporting insulator flange, the supporting insulator flange is connected to the body flange through a bolt, the bottom of the supporting insulator is connected to a shell flange through a bolt, and the shell flange is fixed to the shell through a bolt.
6. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 1, wherein: a shielding sleeve is arranged between the lead tube at the lower part of the shell and the porcelain sleeve.
7. The multi-turn link type sulfur hexafluoride gas insulated current transformer of any one of claims 1 to 6, wherein: the top of the shell is provided with an explosion-proof sheet, and the base is also provided with an IP55 outlet box.
8. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 5, wherein: and a spring contact finger is arranged between the support insulator flange and the lead pipe.
9. The multi-turn link type sulfur hexafluoride gas insulated current transformer of claim 8, wherein: the spring contact finger ring is arranged outside the lead pipe and embedded in a groove formed in the supporting insulator flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921111793.9U CN209843481U (en) | 2019-07-16 | 2019-07-16 | Multi-turn link type sulfur hexafluoride gas insulation current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921111793.9U CN209843481U (en) | 2019-07-16 | 2019-07-16 | Multi-turn link type sulfur hexafluoride gas insulation current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209843481U true CN209843481U (en) | 2019-12-24 |
Family
ID=68899758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921111793.9U Expired - Fee Related CN209843481U (en) | 2019-07-16 | 2019-07-16 | Multi-turn link type sulfur hexafluoride gas insulation current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209843481U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
-
2019
- 2019-07-16 CN CN201921111793.9U patent/CN209843481U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113030838A (en) * | 2021-03-25 | 2021-06-25 | 河南省计量科学研究院 | Electric energy meter calibrating installation of online area load examination |
| CN113030838B (en) * | 2021-03-25 | 2024-02-02 | 河南省计量科学研究院 | Electric energy meter calibrating device for on-line on-load calibration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20191224 |