CN205484429U - Ground connection connecting device of master iron core, folder - Google Patents
Ground connection connecting device of master iron core, folder Download PDFInfo
- Publication number
- CN205484429U CN205484429U CN201620073970.9U CN201620073970U CN205484429U CN 205484429 U CN205484429 U CN 205484429U CN 201620073970 U CN201620073970 U CN 201620073970U CN 205484429 U CN205484429 U CN 205484429U
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- iron core
- folder
- connecting device
- master
- master iron
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Abstract
The utility model discloses a ground connection connecting device of master iron core, folder, including the connection piece, its characterized in that: the connection piece is equipped with square arch. A ground connection connecting device of master iron core, folder, is convenient for measure iron core, folder earth current with clip on ammeter through setting up the arch at the connection piece, seal at measuring point top installation dome and covers the connection piece, prevent that staff's mistake from moving and cause that master iron core, folder appear earth -freely and connect the unstable circumstances, the security of reinforcing equipment operation.
Description
Technical field
This utility model relates to the ground connecting device of a kind of master iron core, folder.
Background technology
Power transformer is when properly functioning, non-uniform electric field is formed between charged winding and lead-in wire and fuel tank, iron core and metal clip thereof are in the middle of the non-uniform electric field of winding, iron core and metal clip thereof will necessarily produce induced voltage, and owing to iron core, position in this electric field, the folder each position are different, the induced voltage produced is the most different, and the pressure reduction between iron core, folder voltage-to-ground or iron core, different 2 of folder reaches will occur during the breakdown voltage of insulating oil the internal discharge phenomenon of transformator.If by iron core, folder single-point grounding, then iron core, folder direct-to-ground capacitance are shorted, the parasitic capacitance between winding due to three-phase symmetrical, so flow through iron core, the capacitance current of folder earth lead is essentially 0.If iron core, multipoint earthing of clamping piece, the loop that the most multiple earth points form with the earth and winding magnetic flux intersecting chain, thus produce faradic current, it being internally formed circulation at iron core, folder, iron core, folder can hot-spots.After master iron core, multipoint earthing of clamping piece, the electric current that iron core, folder ground connection band iron flow through increases a lot, transformator iron loss also can increase, transformator hot-spot, electric discharge can cause gases dissolved in insulation oil hydrogen, total hydrocarbon, acetylene content to go up further, because will also result in bubble electric discharge under main transformer strong electric field environment；Two aspect shelf depreciations all can cause main transformer to damage, scaling loss.
" in operation, iron core grounding current is generally no greater than 0.1A; folder draws individually can measuring folder of ground connection " is required according to " power equipment preventive trial code " DLT 596-1996 regulation; for protection main transformer safe and reliable operation; improving power generation safety, the test of master iron core, clamp earthing current becomes the necessary work of detection main transformer safe operation.
The 500kV power transformer that Pubugou Hydropower Station uses, master iron core, folder all use strip type to connect sheet connection master iron core, folder, master iron core, clamp earthing current test can not be carried out, it is impossible to whether detection master iron core, folder exist the potential safety hazard of multipoint earthing.
Summary of the invention
In place of above-mentioned the deficiencies in the prior art, this utility model provides a kind of master iron core, the ground connecting device of folder.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of master iron core described in the utility model, the ground connecting device of folder, including connecting sheet, it is characterised in that: described connection sheet is provided with square projection.
Further, described connection off-chip is provided with convex and closes dome.
Compared with prior art, the beneficial effects of the utility model:
A kind of master iron core described in the utility model, the ground connecting device of folder, by arranging projection at connection sheet, it is simple to measure iron core, clamp earthing current with clamp on amperemeter；Cover connection sheet measuring some dome installed above closing, prevent staff's malfunction from causing master iron core, folder occur earth-free and connect unstable situation, strengthen the safety of equipment operation.
Accompanying drawing explanation
Fig. 1 is connection chip architecture schematic diagram of the present utility model；
Fig. 2 is connection sheet sectional view of the present utility model；
Fig. 3 is dome top view of the present utility model；
Fig. 4 is dome front view of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail.
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of master iron core described in the utility model, the ground connecting device of folder, including connecting sheet, it is characterised in that: described connection sheet 2 is provided with square projection 3, is provided with convex and closes dome 4 outside described connection sheet 2.
In this utility model, connect and be set as square projection 3 to form convex shape in the middle part of sheet 2, connecting sheet 2 two ends and be provided with connecting hole 1, be used for connecting master iron core lead-out wire and earth point, main transformer folder lead-out wire and earth point, the projection 3 connecting sheet 2 is placed the most upward；Connecting sheet 2 outer top position, dome 4 is installed, dome 4 open side is provided with the edgewise 5 installed, and forms the dome 4 of convex shape, and dome 4 edgewise 5 is provided with multiple equally distributed installing hole 6, dome 4 size is corresponding with connection sheet 2 and junction point thereof, covers connection sheet 2 to close.
A kind of master iron core described in the utility model, the ground connecting device of folder, by arranging protruding 3 at connection sheet 2, it is simple to measure iron core, clamp earthing current with clamp on amperemeter；Cover connection sheet 2 measuring some dome 4 installed above closing, prevent staff's malfunction from causing master iron core, folder occur earth-free and connect unstable situation, beneficially equipment safe and reliable operation.
This attachment means cost is relatively low, it is simple to measure earth current, is beneficial to connect the firm connection of sheet 2, can be dust-proof, waterproof, prevents the excessive inside transformer electric discharge phenomena that cause of pressure reduction between iron core voltage-to-ground or different 2 of iron core, strengthens the safety that equipment runs.
Claims (2)
1. a ground connecting device for master iron core, folder, including connecting sheet, it is characterised in that: described connection sheet is provided with square projection.
A kind of master iron core, the ground connecting device of folder, be characterised by: described connection off-chip is provided with convex and closes dome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073970.9U CN205484429U (en) | 2016-01-26 | 2016-01-26 | Ground connection connecting device of master iron core, folder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620073970.9U CN205484429U (en) | 2016-01-26 | 2016-01-26 | Ground connection connecting device of master iron core, folder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205484429U true CN205484429U (en) | 2016-08-17 |
Family
ID=56639837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620073970.9U Active CN205484429U (en) | 2016-01-26 | 2016-01-26 | Ground connection connecting device of master iron core, folder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205484429U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940934A (en) * | 2019-12-06 | 2020-03-31 | 国网辽宁省电力有限公司检修分公司 | Transformer core clamp measuring and displaying device |
-
2016
- 2016-01-26 CN CN201620073970.9U patent/CN205484429U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940934A (en) * | 2019-12-06 | 2020-03-31 | 国网辽宁省电力有限公司检修分公司 | Transformer core clamp measuring and displaying device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Tang Yong Inventor after: Ren Zemin Inventor after: Huang Tianwen Inventor after: Yuan Yongsheng Inventor after: Tong Song Inventor after: Han Haoxuan Inventor after: Wang Jun Inventor before: Tang Yong Inventor before: Ren Zemin Inventor before: Huang Tianwen Inventor before: Li Lixiang Inventor before: Jiang Liwei |
|
| COR | Change of bibliographic data | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 625000 shangshaba, wusihe Town, Hanyuan County, Ya'an City, Sichuan Province Patentee after: Guoneng Dadu River Pubugou Power Generation Co.,Ltd. Address before: 625000 shangshaba, wusihe Town, Hanyuan County, Ya'an City, Sichuan Province Patentee before: GUODIAN DADU RIVER PUBUGOU POWER GENERATION Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |