CN202110925U - Composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer - Google Patents
Composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer Download PDFInfo
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- CN202110925U CN202110925U CN2011201598777U CN201120159877U CN202110925U CN 202110925 U CN202110925 U CN 202110925U CN 2011201598777 U CN2011201598777 U CN 2011201598777U CN 201120159877 U CN201120159877 U CN 201120159877U CN 202110925 U CN202110925 U CN 202110925U
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- oil
- power transformer
- fagging
- cardboard
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Abstract
The utility model relates to composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer. The body of the oil immersed type power transformer comprises a bottom clamping member, an upper clamping member, a return yoke insulating plate, a small frame iron core, a big frame iron core and three groups of square coils; same composite insulating supports are respectively disposed between every two phases of the three groups of square coils; a thin insulating paper board is also disposed between two paper board oil ways and the support plate. The utility model achieves the advantages of increasing the heat emission effect of the outer surface of the coils of the power transformer, improving the dynamic stability of the transformer coils under the effect of short circuit electrodynamic force, and improving the inter-phase lightning impulse tolerance level of the coils of the power transformers with high voltage level.
Description
Technical field
The utility model relates to the alternate compound inslation fagging of a kind of oil-immersed power transformer three-phase square coil, belongs to power transmission technology field.
Background technology
At present, oil immersed type amorphous alloy core electricity distribution power transformer all adopts square coil, also has part silicon steel oil-filled transformer unshakable in one's determination also to adopt square coil.Because the compactness of square coil coiling is not as good as circular coil; For addressing this problem; A kind of traditional technology way is square coil is carried out hot pressing---dipping lacquer---drying, and the dynamic stability when bearing short circuit to improve square coil is separated coil and improved the alternate lightning impulse level of bearing and suspend with cardboard during the assembling of device body; The shortcoming of this technology is that coil paint-dipping can reduce coil longitudinal insulation performance, thereby reduces the insulation property that transformer integral body is born lightning impulse.Because alternate cardboard can not stretching two lateral coils, under the short-circuit electromotive force effect, coil is alternate to have bigger movable space, just can not guarantee that also square coil has enough anti-sudden short circuit abilities of bearing.
Another kind of way is that square coil is carried out the colligation of half-lap multiple tracks with semi-drying epoxy fibreglass band---drying hot pressing (this technology is dipping lacquer not); At the alternate insertion cardboard of coil coil is separated (belonging to non-stretching separates) during the assembling of device body; The shortcoming of this technology is the not supported consolidation of square coil; Under the short-circuit electromotive force effect; Coil is in alternate some movable spaces that still have, and both difficulty guaranteed that square coil had enough anti-sudden short circuit abilities of bearing, and has reduced the efficiently radiates heat area of coil again because of the no oil flow channel in the coil outside.
Summary of the invention
The purpose of the utility model provides the alternate compound inslation fagging of a kind of oil-immersed power transformer three-phase square coil; This compound inslation fagging can improve the radiating effect of coil outer surface; Can improve coil and bear the dynamic stability under the short-circuit electromotive force effect, can improve the alternate lightning impulse level of bearing of the high power transformer winding of electric pressure.
The technical scheme of the utility model is: the alternate compound inslation fagging of a kind of oil-immersed power transformer three-phase square coil.The device body of oil-immersed power transformer comprises end folder, upper clamping piece, return yoke insulation board, little frame iron core, big frame iron core, three groups of square coils.Be characterized in: alternately be respectively arranged with identical compound inslation fagging at two of three groups of square coils.This compound inslation fagging is two cardboard oil ducts and between two cardboard oil ducts, places the fagging that tightly joins with the cardboard oil duct.Between two cardboard oil ducts and fagging, can also place the thin insulating cardboard.
Described fagging is that a kind of in cardboard, the electrician's plank or two kinds combine.
Two cardboard oil ducts of the utility model play the stretching coil and till land to what the oil circulation of coil heat radiation was dispelled the heat, and two oil ducts can be guaranteed the efficiently radiates heat of coil outer surface.Fagging between oil duct is to be used for stretching cardboard oil duct and coil, and this structure can improve coil and make the dynamic stability of time spent bearing short-circuit electromotive force.When transformer insulated class requirement is high; Theoretical according to oilpaper combination thin insulating small oil gap; Set up the spoke degree impact that improves coil tolerance electric field strength greatly of thin insulating cardboard, the thin insulating cardboard is specially adapted to use on the power transformer of 15kV and above electric pressure.
The utility model has the advantages that provides a kind of oil-immersed power transformer three-phase square coil alternate compound inslation fagging; This compound inslation fagging has improved the radiating effect of coil outer surface; Improve coil and born the dynamic stability under the short-circuit electromotive force effect, improved the high alternate lightning impulse level of bearing of power transformer winding of electric pressure.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is that the structure of the utility model is shown view.
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1, end folder, 2, upper clamping piece, 3, little frame iron core, 4, big frame iron core, 5, square coil, 6, the compound inslation fagging, 7, the cardboard oil duct, 8, fagging, 9, the thin insulating cardboard, 10 return yoke insulation boards.
Embodiment
The existing embodiment that the utility model is described with the alternate compound inslation fagging of the three-phase square coil on the SBH15-M-630/10 oil immersed type Amorphous Alloy Core Transformer.The device body of this oil immersed type amorphous alloy core distribution transformer comprises end folder 1,4, three groups of square coils 5 of 3, two big frame iron cores of 10, two little frame iron cores of 2, two return yoke insulation boards of upper clamping piece.Be characterized in: alternately be respectively arranged with identical compound inslation fagging 6 at two of three groups of square coils 5, this compound inslation fagging 6 is two cardboard oil ducts 7 and between two cardboard oil ducts 7, places the cardboard fagging 8 that tightly joins with cardboard oil duct 7.Between two cardboard oil ducts 7 and cardboard fagging 8, also be placed with thin insulating cardboard 9.The utility model is very little at continuous nine powerful short-circuit electromotive force effect lower coil deflections, and test fore-and-aft survey phase reactance difference is much smaller than the upper limit of national Specification value.Drying hot pressing (without dipping lacquer) can guarantee that coil bears the lightning impulse insulation level of standard code after the square coil winding only need be used the colligation of semi-drying expoxy glass silk ribbon half-lap.
Claims (2)
1. compound inslation fagging that oil-immersed power transformer three-phase square coil is alternate; The device body of oil-immersed power transformer comprises end folder, upper clamping piece, return yoke insulation board; Little frame iron core; Big frame iron core, three groups of square coils is characterized in that: alternately be respectively arranged with identical compound inslation fagging at two of three groups of square coils; This compound inslation fagging is two cardboard oil ducts and between two cardboard oil ducts, places the fagging that tightly joins with the cardboard oil duct, between two cardboard oil ducts and fagging, can also place the thin insulating cardboard.
2. the alternate compound inslation fagging of a kind of oil-immersed power transformer three-phase square coil according to claim 1 is characterized in that: described fagging is that a kind of in cardboard, the electrician's plank or two kinds combine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201598777U CN202110925U (en) | 2011-05-15 | 2011-05-15 | Composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201598777U CN202110925U (en) | 2011-05-15 | 2011-05-15 | Composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202110925U true CN202110925U (en) | 2012-01-11 |
Family
ID=45436379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201598777U Expired - Lifetime CN202110925U (en) | 2011-05-15 | 2011-05-15 | Composite insulating support plates between phase of a three-phase square coil of an oil immersed type power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202110925U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158298A (en) * | 2016-08-25 | 2016-11-23 | 浙江临高电气实业有限公司 | Improve the supporting construction of transformator anti-short circuit capability and installation method thereof and transformator |
-
2011
- 2011-05-15 CN CN2011201598777U patent/CN202110925U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106158298A (en) * | 2016-08-25 | 2016-11-23 | 浙江临高电气实业有限公司 | Improve the supporting construction of transformator anti-short circuit capability and installation method thereof and transformator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |
|
| CX01 | Expiry of patent term |