CN210142572U - Built-in current transformer for 550kV GIS - Google Patents
Built-in current transformer for 550kV GIS Download PDFInfo
- Publication number
- CN210142572U CN210142572U CN201921137944.8U CN201921137944U CN210142572U CN 210142572 U CN210142572 U CN 210142572U CN 201921137944 U CN201921137944 U CN 201921137944U CN 210142572 U CN210142572 U CN 210142572U
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- shell
- coil
- gis
- current transformer
- terminal box
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- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000012212 insulator Substances 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000004078 waterproofing Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The utility model relates to a 550kV GIS is with built-in current transformer, shell are upper and lower both ends open-ended hollow shellThe two ends of the shell are respectively connected with a supporting insulator in a sealing way, the inner end surface of the supporting insulator is connected with a connecting contact, and the two connecting contacts are connected with the inner conductor together; the inner cavity of the shell is provided with an inner cylinder, the outer circumference of the inner cylinder is provided with a coil, the side wall of the shell is provided with an opening, the opening is hermetically connected with a wiring terminal box, and a lead of the wiring terminal box is connected with the coil. The current transformer seals the coil in the GIS shell and arranges the coil in SF6Among the gas environment, be connected through supporting insulator with other parts of GIS, this utility model is not disturbed by environmental factor, and the reliability is higher, has good measurement accuracy and dampproofing and waterproofing nature.
Description
Technical Field
The utility model relates to an ultra-high voltage switchgear technical field among the electric power system, a seal secondary winding current transformer within the GIS casing.
Background
At present, the number of power equipment operated in a power grid is large, wherein current transformers equipped for ultrahigh voltage switchgear are external current transformers, namely: the environment of the secondary winding of the current transformer is air. So, if the super high voltage switchgear environment is outdoor, it is great to receive outdoor environment to influence, and the current transformer storehouse internal intake, ponding scheduling problem appear easily in the equipment protection, lead to CT secondary winding to wet, influence equipment measurement accuracy.
The existing 550kV voltage class is a main power grid on the domestic market and is mostly located in rainy and humid areas in south China, the original current transformer is externally arranged, and the possibility that rainwater enters an internal secondary winding to be affected is caused, so that the insulation level of the secondary winding is reduced, and even a short-circuit fault occurs.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a 550kV GIS is with built-in current transformer, this current transformer seals the coil and arranges the SF in inside the GIS casing in6Among the gas environment, be connected through supporting insulator with other parts of GIS, this utility model is not disturbed by environmental factor, and the reliability is higher, has good measurement accuracy and dampproofing and waterproofingAnd (4) sex.
For solving the above problems, the specific technical scheme of the utility model is as follows: a built-in current transformer for a 550kV GIS is characterized in that a shell is a hollow shell with openings at the upper end and the lower end, the two ends of the shell are respectively connected with a supporting insulator in a sealing manner, the inner end surface of the supporting insulator is connected with a connecting contact, and the two connecting contacts are connected with an inner conductor together; the inner cavity of the shell is provided with an inner cylinder, the outer circumference of the inner cylinder is provided with a coil, the side wall of the shell is provided with an opening, the opening is hermetically connected with a wiring terminal box, and a lead of the wiring terminal box is connected with the coil.
The top surface of the coil is provided with a top plate, the side wall of the top of the inner barrel is provided with a support, one end of a compression screw is connected with the support, and the other end of the compression screw compresses the coil through the top plate.
The inner end surface of the wiring terminal box is provided with an annular groove, a sealing ring is arranged in the annular groove, and the sealing ring is used for sealing and connecting the wiring terminal box and the shell; the outlet of the terminal box extends downwards.
The built-in current transformer for the 550kV GIS adopts a support and shield combined structure, has a simple shield structure, increases the diameter of a secondary winding on the premise of meeting the insulation requirement and the support strength, reduces the overall height of equipment, prevents the secondary winding from being interfered by external environmental factors, and has stable and reliable performance.
Drawings
Fig. 1 is a schematic structural diagram of a built-in current transformer for a 550kV GIS.
Fig. 2 is a partially enlarged view of the connection of the terminal block.
Detailed Description
As shown in fig. 1, a built-in current transformer for 550kV GIS, a housing 1 is a hollow shell with openings at the upper and lower ends, the two ends of the housing 1 are respectively connected with a supporting insulator 3 in a sealing manner, the inner end surface of the supporting insulator 3 is connected with a connecting contact 4, and the two connecting contacts 4 are connected with an inner conductor 2 together; an inner cylinder 7 is arranged in the inner cavity of the shell 1, a coil 5 is arranged on the outer circumference of the inner cylinder, an opening is arranged on the side wall of the shell 1, a wiring terminal box 6 is hermetically connected at the opening, a lead of the wiring terminal box 6 is connected with the coil 5, and the coil is sealed in the GIS shellThe housing 1 is filled with SF6And the gas ensures the working environment of the current transformer.
The top surface of the coil 5 is provided with a top plate 8, the side wall of the top of the inner barrel 7 is provided with a support 9, one end of a compression screw 10 is connected with the support 9, and the other end of the compression screw compresses the coil 5 through the top plate 8.
As shown in fig. 2, an annular groove is formed in the inner end surface of the connection terminal box 6, a sealing ring 11 is arranged in the annular groove, and the connection terminal box 6 is connected with the housing 1 in a sealing manner through the sealing ring 11; the wire outlet of the wiring terminal box 6 extends downwards, and the structure ensures the waterproof performance of the wiring terminal box 6.
The utility model discloses a built-in current transformer has good measurement accuracy and dampproofing and waterproofing nature, adopts support and shielding integrated configuration, thereby satisfies to make the increase of secondary winding diameter reduce the whole height of equipment under the prerequisite of insulating requirement and support intensity, and secondary winding does not receive external environment factor to disturb, and the stable performance is reliable. The 550kV built-in current transformer can greatly improve the running stability of ultrahigh voltage switch equipment in a power system.
Claims (3)
1. The utility model provides a built-in current transformer is used to 550kV GIS which characterized in that: the shell (1) is a hollow shell with openings at the upper end and the lower end, the two ends of the shell (1) are respectively connected with the supporting insulator (3) in a sealing manner, the inner end surface of the supporting insulator (3) is connected with the connecting contact (4), and the two connecting contacts (4) are connected with the inner conductor (2) together; an inner cylinder (7) is arranged in an inner cavity of the shell (1), a coil (5) is arranged on the outer circumference of the inner cylinder, an opening is formed in the side wall of the shell (1), the opening is connected with a wiring terminal box (6) in a sealing mode, and a lead of the wiring terminal box (6) is connected with the coil (5).
2. The built-in current transformer for 550kV GIS according to claim 1, characterized in that: the top surface of coil (5) on be equipped with roof (8), be equipped with support (9) on the lateral wall at inner tube (7) top, housing screw (10) one end is connected with support (9), the other end compresses tightly coil (5) through roof (8).
3. The built-in current transformer for 550kV GIS according to claim 1, characterized in that: an annular groove is formed in the inner end face of the wiring terminal box (6), a sealing ring (11) is arranged in the annular groove, and the wiring terminal box (6) is connected with the shell (1) in a sealing mode through the sealing ring (11); the outlet of the wiring terminal box (6) extends downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137944.8U CN210142572U (en) | 2019-07-19 | 2019-07-19 | Built-in current transformer for 550kV GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137944.8U CN210142572U (en) | 2019-07-19 | 2019-07-19 | Built-in current transformer for 550kV GIS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210142572U true CN210142572U (en) | 2020-03-13 |
Family
ID=69736709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921137944.8U Active CN210142572U (en) | 2019-07-19 | 2019-07-19 | Built-in current transformer for 550kV GIS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210142572U (en) |
-
2019
- 2019-07-19 CN CN201921137944.8U patent/CN210142572U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20231024 Granted publication date: 20200313 |
|
| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240117 Granted publication date: 20200313 |
|
| PD01 | Discharge of preservation of patent |