CN106024336A - Combined and insulated intermediate-pressure cast instrument transformer - Google Patents
Combined and insulated intermediate-pressure cast instrument transformer Download PDFInfo
- Publication number
- CN106024336A CN106024336A CN201610525285.XA CN201610525285A CN106024336A CN 106024336 A CN106024336 A CN 106024336A CN 201610525285 A CN201610525285 A CN 201610525285A CN 106024336 A CN106024336 A CN 106024336A
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- CN
- China
- Prior art keywords
- pressure cast
- middle pressure
- winding
- combined
- mutual inductor
- Prior art date
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/288—Shielding
- H01F27/2885—Shielding with shields or electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
Abstract
The invention discloses a combined and insulated intermediate-pressure cast instrument transformer, which comprises a primary winding, a secondary winding and an insulating layer. The combined and insulated intermediate-pressure cast instrument transformer is characterized in that the primary and secondary windings are wrapped with a semiconductor crepe paper shielding layer, wherein the insulating layer on a master insulating part between the primary and secondary windings is a polyurethane insulating layer obtained by vacuum drying treatment, vacuum injection at normal temperature and vacuum stirring degassing; a non-master insulating part positioned on the outer side of the primary winding is provided with an inorganic insulating material filler. According to the combined and insulated intermediate-pressure cast instrument transformer, the electrical performance of the intermediate-pressure cast instrument transformer is remarkably improved, local discharge is reduced, the product is prevented from aging and even breakdown and burst, the running reliability of the product is improved, and the combined and insulated intermediate-pressure cast instrument transformer is strong in mechanical strength, low in cost, safe and environmentally-friendly.
Description
Technical field
The present invention relates to a kind of transformer, particularly relate to the middle pressure cast-type mutual inductor of a kind of combined insulation.
Background technology
The middle pressure transformer that existing 10 ~ 40.5kV is used in power system, the most all uses High temp. epoxy resins to pour into a mould.The transformer of epoxy casting, Fig. 1-1 is the structural representation of the middle pressure pouring current transformer of epoxy casting in prior art.Fig. 1-2 is the structural representation of the middle pressure casting type voltage mutual inductor of epoxy casting in prior art.Fig. 1-3 is the schematic side view of the middle pressure casting type voltage mutual inductor of epoxy casting in prior art.Enough gaps will be left between winding 11 and Secondary Winding 12 and form insulating barrier 13, gap uses the method for vacuum pouring or uses the method filling epoxy resin of APG, the insulating barrier formed by epoxy resin undertakes the voltage between a secondary conductor, additionally, this casting transformer, not only to undertake the major insulation between a Secondary Winding, also to undertake winding external insulation over the ground, so substantial amounts of epoxy resin is used to solve external insulation, even account for more than 80%.
This kind of epoxy resin poured into a mould, because to undertake corresponding mechanical strength, so being furnished with the filler than larger proportion, this filler can cause castable to compare thickness, affects the effect of vacuum outgas, can produce shelf depreciation.Epoxy resin can produce stress during hot setting, and toughness is very poor, the most cracking, Decrepitation Phenomena.
Summary of the invention
It is an object of the invention to provide the middle pressure cast-type mutual inductor of a kind of combined insulation, the electric property of middle pressure casting transformer can be significantly improved, both reduced shelf depreciation, improve conforming product rate, it is possible to prevent again product cracking even puncture and burst, improves product reliability of operation.Meanwhile, volume can be reduced, reduce cost.
The purpose of the present invention is achieved through the following technical solutions:
A kind of middle pressure cast-type mutual inductor of combined insulation, including winding, Secondary Winding and insulating barrier, it is characterized in that: outside a winding and Secondary Winding, be surrounded by quasiconductor crimped paper screen layer, once between winding and Secondary Winding the insulating barrier at major insulation position be after vacuum drying treatment, vacuum injects the polyurethane insulating layer after vacuum stirring deaerates at normal temperatures, is positioned at the insulation of the non-master outside winding position and is provided with inorganic insulating material implant.
Further, inorganic insulating material implant is electroceramics or glass.Insulating barrier is after vacuum drying treatment, and vacuum is injected and formed, after vacuum stirring degassing, solidification, the polyurethane insulating layer not having bubble, low office to put at normal temperatures.
Heretofore described middle pressure cast-type mutual inductor is middle pressure pouring current transformer or middle pressure casting type voltage mutual inductor.
The present invention uses the mode of combined insulation, on the one hand, the insulating barrier (3) at major insulation position uses polyurethane to be used as mould material, it possesses excellent electric properties, mobility, toughness are good, the advantages such as normal temperature cure shrinkage stress is little, can effectively solution office put, and ftracture, the problem such as explosion during preventing life-time service.After vacuum drying treatment, vacuum injects excellent electric properties after vacuum stirring deaerates, all good polyurethane of mobility, toughness at normal temperatures, forms the insulating barrier not having bubble, low office to put after solidification.Polyurethane material can efficiently solve the problem that High temp. epoxy resins exists, but this material cost is higher, it is impossible to is widely used.On the other hand, being surrounded by quasiconductor crimped paper screen layer outside a winding and Secondary Winding, non-master insulation position is filled the inorganic material implant such as electroceramics or glass, can be efficiently solved the shortcoming that polyurethane material cost is high.
Invention significantly improves the electric property of middle pressure casting transformer, reduce shelf depreciation, prevent the aging of product from even puncturing and bursting, improve product reliability of operation.There is mechanical strength height, low cost and other advantages simultaneously.It addition, polyurethane is the material that can recycle, the internal inorganic material filled can also recycle, and in solving in the past, die pressing product epoxy resin cannot process the problem that can only fill, and has the social benefit of maximum.
The present invention can significantly improve the electric property of middle pressure casting transformer, had both reduced shelf depreciation, improves conforming product rate, is possible to prevent again product cracking even puncture and burst, improves product reliability of operation.Meanwhile, volume can be reduced, reduce cost, safety and environmental protection.
Accompanying drawing explanation
Fig. 1-1 is the structural representation of the middle pressure pouring current transformer of epoxy casting in prior art.
Fig. 1-2 is the structural representation of the middle pressure casting type voltage mutual inductor of epoxy casting in prior art.
Fig. 1-3 is the schematic side view of the middle pressure casting type voltage mutual inductor of epoxy casting in prior art.
Fig. 2-1 is the structural representation of the middle pressure pouring current transformer of the present invention.
Fig. 2-2 is the structural representation of the middle pressure casting type voltage mutual inductor of the present invention.
Fig. 2-3 is the schematic side view of the middle pressure casting type voltage mutual inductor of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 2-1 is the middle pressure pouring current transformer structural representation of the present invention.Fig. 2-2 and Fig. 2-3 is the middle pressure casting type voltage mutual inductor structural representation of the present invention.
A kind of middle pressure cast-type mutual inductor of combined insulation, including winding 1, Secondary Winding 2 and insulating barrier 3, quasiconductor crimped paper screen layer 5 it is surrounded by outside a winding and Secondary Winding, once between winding and Secondary Winding the insulating barrier 3 at major insulation position be after vacuum drying treatment, vacuum injects excellent electric properties after vacuum stirring deaerates at normal temperatures, mobility, toughness are all good, form the polyurethane insulating layer not having bubble, low office to put after solidification, be positioned at the insulation of the non-master outside winding position and be provided with inorganic insulating material implant 4.Inorganic insulating material implant is electroceramics or glass.
The present invention uses the mode of combined insulation, on the one hand, the insulating barrier at major insulation position uses polyurethane to be used as mould material, and polyurethane material can efficiently solve the problem that High temp. epoxy resins exists, but this material cost is higher, it is impossible to is widely used.On the other hand, being surrounded by quasiconductor crimped paper screen layer outside a winding and Secondary Winding, non-master insulation position is filled the inorganic material implant such as electroceramics or glass, can be efficiently solved the shortcoming that polyurethane material cost is high.The present invention may be used in middle pressure pouring current transformer or middle pressure casting type voltage mutual inductor.
Although the present invention discloses as above with preferred embodiment; so it is not limited to the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when making a little amendment and perfect, therefore protection scope of the present invention is when with being as the criterion that claims are defined.
Claims (4)
1. the middle pressure cast-type mutual inductor of a combined insulation, including a winding (1), Secondary Winding (2) and insulating barrier (3), it is characterized in that: outside a winding (1) and Secondary Winding (2), be surrounded by quasiconductor crimped paper screen layer (5), being positioned at the insulating barrier (3) at major insulation position between a winding (1) and Secondary Winding (2) is after vacuum drying treatment, vacuum injects the polyurethane insulating layer (3) after vacuum stirring deaerates at normal temperatures, the non-master insulation position being positioned at winding (1) outside is provided with inorganic insulating material implant (4).
The middle pressure cast-type mutual inductor of combined insulation the most according to claim 1, it is characterised in that: inorganic insulating material implant (4) is electroceramics or glass.
The middle pressure cast-type mutual inductor of combined insulation the most according to claim 1, it is characterized in that: insulating barrier (3) is after vacuum drying treatment, vacuum is injected and is formed, after vacuum stirring degassing, solidification, the polyurethane insulating layer (3) not having bubble, low office to put at normal temperatures.
The middle pressure cast-type mutual inductor of combined insulation the most according to claim 1, it is characterised in that: medium pressure cast-type mutual inductor is middle pressure pouring current transformer or middle pressure casting type voltage mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525285.XA CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610525285.XA CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106024336A true CN106024336A (en) | 2016-10-12 |
| CN106024336B CN106024336B (en) | 2018-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610525285.XA Active CN106024336B (en) | 2016-07-06 | 2016-07-06 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Country Status (1)
| Country | Link |
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| CN (1) | CN106024336B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920639A (en) * | 2017-03-16 | 2017-07-04 | 江苏智达高压电气有限公司 | Cast-type mutual inductor is pressed in a kind of environment-friendly type |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200965825Y (en) * | 2006-10-20 | 2007-10-24 | 信阳信互电器有限公司 | A novel current mutual-inductor |
| WO2008127575A1 (en) * | 2007-04-12 | 2008-10-23 | Abb Technology Ag | Outdoor electrical device with an improved resin insulation system |
| JP2009299614A (en) * | 2008-06-16 | 2009-12-24 | Mitsubishi Electric Corp | Ignition device for internal combustion engine |
| CN201741564U (en) * | 2010-07-20 | 2011-02-09 | 湖北大二互科技有限公司 | Epoxy-resin vacuum-pouring dry-type current transformer |
| CN204011030U (en) * | 2014-08-20 | 2014-12-10 | 南京智达电气有限公司 | Middle pressure pouring current transformer |
| CN205751820U (en) * | 2016-07-06 | 2016-11-30 | 江苏智达高压电气有限公司 | A kind of middle pressure cast-type mutual inductor of combined insulation |
-
2016
- 2016-07-06 CN CN201610525285.XA patent/CN106024336B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200965825Y (en) * | 2006-10-20 | 2007-10-24 | 信阳信互电器有限公司 | A novel current mutual-inductor |
| WO2008127575A1 (en) * | 2007-04-12 | 2008-10-23 | Abb Technology Ag | Outdoor electrical device with an improved resin insulation system |
| JP2009299614A (en) * | 2008-06-16 | 2009-12-24 | Mitsubishi Electric Corp | Ignition device for internal combustion engine |
| CN201741564U (en) * | 2010-07-20 | 2011-02-09 | 湖北大二互科技有限公司 | Epoxy-resin vacuum-pouring dry-type current transformer |
| CN204011030U (en) * | 2014-08-20 | 2014-12-10 | 南京智达电气有限公司 | Middle pressure pouring current transformer |
| CN205751820U (en) * | 2016-07-06 | 2016-11-30 | 江苏智达高压电气有限公司 | A kind of middle pressure cast-type mutual inductor of combined insulation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106920639A (en) * | 2017-03-16 | 2017-07-04 | 江苏智达高压电气有限公司 | Cast-type mutual inductor is pressed in a kind of environment-friendly type |
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| Publication number | Publication date |
|---|---|
| CN106024336B (en) | 2018-02-23 |
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