CN201035064Y - Through wall type totally enclosed current mutual inductor - Google Patents
Through wall type totally enclosed current mutual inductor Download PDFInfo
- Publication number
- CN201035064Y CN201035064Y CNU2007200117754U CN200720011775U CN201035064Y CN 201035064 Y CN201035064 Y CN 201035064Y CN U2007200117754 U CNU2007200117754 U CN U2007200117754U CN 200720011775 U CN200720011775 U CN 200720011775U CN 201035064 Y CN201035064 Y CN 201035064Y
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- Prior art keywords
- current transformer
- winding
- totally
- penetrating type
- enclosed current
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Abstract
The utility model relates to a through-wall type all-closed current transformer, including an iron core, a secondary winding wound on the iron core, a primary winding, a primary wiring terminal and a secondary wiring terminal, the utility model is formed to be an integration structure by epoxy resin vacuum casting, the middle of the integration structure is provided with an flange which forms an all-closed structure with the integration structure by epoxy resin vacuum casting; the secondary wiring terminal is disposed in the secondary wiring mask made by transparent material; the transparent material is pmma; the secondary wiring mask is provided with a mask sealing screw with lead seal hole, the side of the secondary wiring mask has a semi-circular line outgoing hole; the part of the primary winding which is sealed in the integration structure is high voltage insulator which is rectangular parallelepiped and two ends are provided with inner concave umbrella skirts. The utility model has the advantages of small size, long creepage distance, high dynamo-thermal standing current, high measurement precision, whole sealing, moisture proof, dewing proof, anti-electric energy stolen, transparence, etc.
Description
Technical field
The utility model relates to a kind of electric system high-pressure measurement mechanism, the totally-enclosed current transformer of specifically a kind of wall-penetrating type.
Background technology
The wall-penetrating type current transformer is to measure electric current in the electric system switch cubicle; the equipment of electric energy or relay protection; the semiclosed current transformer of wall-penetrating type current transformer that electric system is at present used for adopting iron core to expose; be that inside is encapsulated with one; the insulating body of Secondary Winding; the iron core that closed assembly forms; three main elements of metal installing plate are through folder; bolts etc. are assembled into an one-piece construction; it is big to exist volume; creepage distance is little; the dynamic and thermal stability electric current is little; measuring accuracy is low; the easy moisture absorption; shortcomings such as easy stealing; properties of product are with prolonging service time; its precision; insulating property all descend in various degree; become the hidden danger of equipment safety operation in the electric system; above problems are perplexing the electric system maintainer all the time, become the problem of the urgent solution of institute in electric system wall-penetrating type current transformer upgrading and the development.
The utility model content
In order to solve big, the shortcomings such as creepage distance is little, the dynamic and thermal stability electric current is little, measuring accuracy is low, the easy moisture absorption of wall-penetrating type current transformer volume in the existing electric system switch cubicle, the utility model provide a kind of that the epoxide resin vacuum cast forms for adopting, volume is little, creepage distance is big, dynamic and thermal stability electric current height, measuring accuracy height, protection against the tide, anti-condensation, the anti-electricity-theft totally-enclosed current transformer of wall-penetrating type.
For achieving the above object, the technical solution adopted in the utility model is:
The totally-enclosed current transformer of the utility model wall-penetrating type comprise by unshakable in one's determination, be set around Secondary Winding on the iron core, winding, primary connection terminal, secondary connection terminal, adopt the epoxide resin vacuum cast and into a single integrated structure, have mounting flange at described integrative-structure middle part, adopt the epoxide resin vacuum cast to form full-closed structure with described integrative-structure.
Described secondary connection terminal places in the secondary connection cover that transparent material makes; Described transparent material is an organic glass; Have the sealing cover screw that has lead seal hole on the described secondary connection cover, there is semicircular wire hole secondary connection cover side; The part of sealing a winding in described integrative-structure is a high voltage insulator, and it is a rectangular parallelepiped, and is provided with the indent full skirt at two ends; The part of sealing Secondary Winding in described integrative-structure is the low-voltage insulation body, and it is the right cylinder of a horizontal positioned; A described winding adopts the lead coiling that strengthens the line footpath.
The utlity model has following beneficial effect and advantage:
1. volume is little, creepage distance is big.The utility model adopts epoxide resin vacuum to pour into a mould and into a single integrated structure by coil device body and mounting flange, the unshakable in one's determination envelope places insulating material inside, seal a winding high voltage insulator be shaped as rectangular parallelepiped, and it is the indent full skirt that cross sectional shape is arranged at two ends, effectively increases the product surface creepage distance; The low-voltage insulation body of sealing Secondary Winding is the right cylinder of horizontal positioned, is guaranteeing to make the product size compactness on Inside coil insulation and the uniform basis of electric field distance, structure is more reasonable, in light weight, can be installed on flexibly in the switch cabinet, use as electric current, electric energy metrical and relay protection;
2. dynamic and thermal stability electric current height, the measuring accuracy height.Winding of the utility model adopts the lead coiling in enlarging section line footpath, has improved a dynamic and thermal stability electric current of the present utility model, can effectively avoid system short-circuit and excess current to cause the too high and insulation damages of mutual inductor temperature rise; Measure coil simultaneously and adopt superconduction magnetic material, can make the form of multiple no-load voltage ratio, measuring accuracy can reach the 0.2S level, effectively guarantees the accuracy that product measures under the bigger situation of wide load and load variations;
3. hermetically sealed, moistureproof, anti-condensation.The utility model is whole to adopt the epoxide resin vacuum cast to form, and all parts all seal and place insulating material inside, have protection against the tide, antifogging function, can the performance degradation phenomenon not occur because of the humidity of running environment, condensation;
4. anti-electricity-theft transparence.The secondary connection terminal is positioned at the secondary connection cover that transparent material is made, and can conveniently observe directly the actual conditions of secondary connection, and the secondary connection cover has the lead sealing function, avoids switching secondary line and causes stealing electricity phenomenon.
Description of drawings
Fig. 1 is the utility model external structure front view;
Fig. 2 is the utility model external structure lateral plan;
Fig. 3 is the utility model inner structure synoptic diagram.
Embodiment
Shown in Fig. 1～3, the utility model adopts following structure: comprise by unshakable in one's determination 1, be set around Secondary Winding 3 on the iron core, winding 2, primary connection terminal 4, secondary connection terminal 5, adopt the epoxide resin vacuum cast and into a single integrated structure, also have mounting flange 12 at this integrative-structure middle part, adopt the epoxide resin vacuum cast to form full-closed structure with integrative-structure; Described secondary connection terminal 5 places in the secondary connection cover 9 that transparent material (present embodiment employing organic glass) makes, and has the sealing cover screw 10 that has lead seal hole on this secondary connection cover 9, and there is semicircular wire hole 11 secondary connection cover side; The part of sealing a winding 2 in described integrative-structure is a high voltage insulator 6, and it is a rectangular parallelepiped, and is provided with indent full skirt 7 at two ends; The part of sealing Secondary Winding 3 in described integrative-structure is a low-voltage insulation body 8, and it is the right cylinder of a horizontal positioned.
Structure of the present utility model forms by following process: Secondary Winding 3 is wound on equably on the iron core 1 of circular ring type, utilize winding 2 of specific purpose tool coiling, and auxiliary wrapping insulating material, after Secondary Winding 3 is utilized Secondary Winding support 13 to bundle and is cushioned wrapping, form have primary connection terminal 4, the coil device body of winding 2, Secondary Winding 3, secondary connection terminal 5; Secondary Winding 3 is utilized Secondary Winding support 13 and flange that inserts 14 is installed and is fixed on the mould, one time winding 2 adopts primary connection terminal 4 to be fixed on the mould, adjusting the distance back forms with the epoxide resin vacuum cast cured explosive, become one by primary connection terminal 4 thereupon, seal the high voltage insulator 6 of a winding 3, mounting flange 12, seal the integral structure of the low-voltage insulation body 11 of Secondary Winding 3, at last secondary connection cover 9 is put secondary connection terminal 5 envelopes by sealing cover screw 10, when the user uses, can observe directly the actual conditions of secondary connection easily by transparent secondary connection cover 9, sealing cover screw 10, secondary connection cover 9 has lead seal hole, has anti-stealing electricity function, the side of secondary connection cover has semicircular wire hole 11, is convenient to drawing of secondary lead wires.
Seal a winding 2 high voltage insulator 6 be shaped as rectangular parallelepiped, and at two ends cross sectional shape to be arranged be square or circular indent full skirt 7, effectively increases the product surface creepage distance; The low-voltage insulation body 8 of sealing Secondary Winding 3 is the right cylinder of horizontal positioned, is guaranteeing to make the product size compactness on Inside coil insulation and the uniform basis of electric field distance, and structure is more reasonable.
One time winding 2 adopts the lead coiling in enlarging section line footpath, to improve a dynamic and thermal stability electric current of the present utility model, can avoid the utility model because system short-circuit and excess current cause phenomenons such as the too high and insulation damages of temperature rise, measure coil simultaneously and adopt superconduction magnetic material, make multiple no-load voltage ratio form, improved measuring accuracy.
During use, earlier the utility model is passed the profiling hole that the switch cabinet is made in advance, the mounting hole that utilizes flange that inserts and cabinet are installed is then fixed with web member, carries out the electric and mechanical connection of bus and secondary cable line again, install the secondary connection cover at last, promptly finish installation.
The totally-enclosed current transformer of the utility model wall-penetrating type is a kind of new product that designs according to national standard fully, employing rolls iron core, utilize the electromagnetic conversion principle, make the secondary current situation of change of reflected measurement primary current exactly, be transferred to secondary measurement and control device; Product directly is installed in the switch cubicle, uses as electric current, electric energy measurement and relay protection.
Adopt that the epoxide resin vacuum cast forms, volume is little, creepage distance is big, dynamic and thermal stability electric current height, measuring accuracy height, protection against the tide, anti-condensation, anti-electricity-theft, can be widely used in the transformation of electric system switch cubicle and newly design in the switch cubicle and go.
Claims (7)
1. totally-enclosed current transformer of wall-penetrating type, comprise by unshakable in one's determination, be set around Secondary Winding on the iron core, winding, primary connection terminal, secondary connection terminal, adopt the epoxide resin vacuum cast and into a single integrated structure, it is characterized in that: have mounting flange (12) at described integrative-structure middle part, adopt the epoxide resin vacuum cast to form full-closed structure with described integrative-structure.
2. by the totally-enclosed current transformer of the described wall-penetrating type of claim 1, it is characterized in that: described secondary connection terminal (5) places in the secondary connection cover (9) that transparent material makes.
3. by the totally-enclosed current transformer of the described wall-penetrating type of claim 2, it is characterized in that: described transparent material is an organic glass.
4. by the totally-enclosed current transformer of the described wall-penetrating type of claim 2, it is characterized in that: have the sealing cover screw (10) that has lead seal hole on the described secondary connection cover (9), there is semicircular wire hole (11) secondary connection cover side.
5. by the totally-enclosed current transformer of the described wall-penetrating type of claim 1, it is characterized in that: the part of sealing a winding (2) in described integrative-structure is high voltage insulator (6), and it is a rectangular parallelepiped, and is provided with indent full skirt (7) at two ends.
6. by the totally-enclosed current transformer of the described wall-penetrating type of claim 1, it is characterized in that: the part of sealing Secondary Winding (3) in described integrative-structure is low-voltage insulation body (8), and it is the right cylinder of a horizontal positioned.
7. by the totally-enclosed current transformer of the described wall-penetrating type of claim 1, it is characterized in that: a described winding (2) adopts the lead coiling that strengthens the line footpath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200117754U CN201035064Y (en) | 2007-04-20 | 2007-04-20 | Through wall type totally enclosed current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200117754U CN201035064Y (en) | 2007-04-20 | 2007-04-20 | Through wall type totally enclosed current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201035064Y true CN201035064Y (en) | 2008-03-12 |
Family
ID=39195954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200117754U Expired - Lifetime CN201035064Y (en) | 2007-04-20 | 2007-04-20 | Through wall type totally enclosed current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201035064Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623153A (en) * | 2012-03-29 | 2012-08-01 | 中国电力科学研究院 | Insulating sheath for current transformer |
| CN102945744A (en) * | 2012-10-25 | 2013-02-27 | 湖南特诚成套电器有限公司 | Integrally cast micro-current transformer |
-
2007
- 2007-04-20 CN CNU2007200117754U patent/CN201035064Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623153A (en) * | 2012-03-29 | 2012-08-01 | 中国电力科学研究院 | Insulating sheath for current transformer |
| CN102623153B (en) * | 2012-03-29 | 2016-02-24 | 中国电力科学研究院 | A kind of current transformer insulating sleeve |
| CN102945744A (en) * | 2012-10-25 | 2013-02-27 | 湖南特诚成套电器有限公司 | Integrally cast micro-current transformer |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080312 |