CN101847502B - Preparation method of TPY-level current transformer with secondary current of being 5A - Google Patents
Preparation method of TPY-level current transformer with secondary current of being 5A Download PDFInfo
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- CN101847502B CN101847502B CN2010101968327A CN201010196832A CN101847502B CN 101847502 B CN101847502 B CN 101847502B CN 2010101968327 A CN2010101968327 A CN 2010101968327A CN 201010196832 A CN201010196832 A CN 201010196832A CN 101847502 B CN101847502 B CN 101847502B
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Abstract
The invention discloses a TPY-level current transformer with secondary current of being 5A, comprising an iron core, epoxy laminated glass cloth boards, a stainless steel belt and a fastener, wherein the iron core is symmetrically provided with two air gaps with the widths of being respectively 0.6-0.8mm; the air gaps are internally provided with the epoxy laminated glass cloth boards; and the outer part of the iron core is provided with the stainless steel belt and the fastener, and the fastener is fastened at the outer part of the stainless steel belt. The current transformer uses the stainless steel belt with the width of being 16mm to tightly clamp the iron core and leads the positions of the air gaps not to be changed, thus ensuring the performance stability of the iron core. Then a phi 1.8 enamelled wire is used for being uniformly wound into a coil, the outer insulation of the coil adopts an epoxy casting structure and the thickness of an epoxy casting layer is controlled to be about 10mm. The TPY-level current transformer does not have influence on the content of micro-water in matched products, and reduces assembling difficulty. The coil with the structure is not easy to deform due to the influence of external force in the processes of assembly and transshipment, thus ensuring the performance stability of the coil.
Description
Technical field:
The invention belongs to the High-Voltage Electrical Appliances field, relate to a kind of current transformer and preparation method thereof, TPY level current transformer that especially a kind of secondary current is 5A and preparation method thereof.
Background technology:
Current transformer is as one of important composition parts of high-voltage switch gear, be divided into measure with and protection with two kinds.TPY level current transformer is to belong to transient protection to use.In extra high voltage system, aperiodic component of short-circuit current is longer die-away time, and requires the time of excision short trouble very short, and below 0.1s, the current transformer of this moment also is in the transient state operating state, therefore requires current transformer can guarantee transient error.Usually the secondary current of TPY level current transformer is 1A.Because it is 1A that secondary current is selected by newly-built transformer station, can reduce the capacity of secondary circuit, realize the digitlization and the Microcomputer Protection of transformer station easily.But for old transformer station, no matter be dilatation or transformation, still needing secondary current is 5A.Therefore the current transformer of developing secondary current and be 5A is necessary.
Summary of the invention:
The objective of the invention is to the secondary current of TPY level current transformer is accomplished 5A.At utmost satisfy user's demand.
Technical scheme of the present invention comprises: secondary current is the structure of the TPY level current transformer of 5A, calculates and demonstration test.
For secondary current is the TPY level current transformer of 5A, square being directly proportional of sectional area unshakable in one's determination and secondary current, so that secondary current is the area of core section of TPY level current transformer of 5A is very big, the internal resistance of coil is just very big.So select the secondary lead in suitable line footpath, the internal resistance that reduces coil just seems very important.
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, it is the TPY level current transformer of 5A that a kind of secondary current is provided, and comprises that iron core, laminated epoxy glass-cloth board, stainless steel band and bundle buckle; Be symmetrically arranged with two width on the said iron core and be the air gap of 0.6-0.8mm; Be provided with laminated epoxy glass-cloth board in the said air gap; Said outer setting unshakable in one's determination has stainless steel band to buckle with pricking, and pricks button and pricks at stainless steel band outside.
Said bundle button outer setting has enamelled wire, and the enamelled wire outer surface is disposed with polyester film, wrinkle cable paper and slim cotton band from inside to outside.
Said secondary current is the preparation method of the TPY level current transformer of 5A, according to following steps:
(1) elder generation with the section embedding, is symmetrically arranged with the air gap that two width are 0.6-0.8mm with epoxy resin then on iron core;
(2) in air gap, be provided with laminated epoxy glass-cloth board, the adjustment width of air gap is 0.6-0.8mm;
(3) unshakable in one's determination with the stainless steel band lock ring, tighten stainless steel band with pricking button again;
(4), wrap up with polyester film, wrinkle cable paper and slim cotton band successively from inside to outside in the coil outside with the even coiling of enamelled wire.
(5) coil that bandages is poured into a mould with epoxy resin, the thickness of epoxy resin is 9-11mm.
The thickness of said step (1) epoxy resin is 1-2mm.Said step (2) adjustment width of air gap is 0.6-0.8mm.The thickness of said step (5) epoxy resin is 9-11mm.
In order to cooperate the design feature of GIS product, secondary current is that the structure of structure and the TPY level current transformer that secondary current is 1A of TPY level current transformer of 5A is basic identical, is loop configuration.Design size is internal diameter Φ 320mm, external diameter Φ 600mm, height 260mm.For reducing remanent magnetism, the mode of opening air gap that adopts unshakable in one's determination.But because secondary current is big, the number of turn is less, and full shelves are 500 circles, and tap is 250 circles.So the inductance value of coil is also very little, full shelves are 3.2 Henry, and tap is 0.8 Henry.The secondary time constant is less, is 0.4 second, for satisfying the requirement of coil error, needs the electric current of excitation just bigger.The quantity of air gap unshakable in one's determination is 2, and width will be adjusted very for a short time, and two air gap overall widths are controlled at about 1.4mm, and the width of each air gap is 0.7mm, and the remanent magnetism that guarantees coil is below 10%.Unshakable in one's determination before opening air gap earlier with epoxy resin with the section embedding, make its one-tenths as a whole, can guarantee to cut the air gap back core like this and be not easy diffusing sheet.With band saw iron core is cut, then with the laminated epoxy glass-cloth board pad at the air gap place.Adjust the width (being controlled at about design load 0.7mm) of two air gaps, make it satisfy magnetic property requirement unshakable in one's determination.Use width unshakable in one's determination again, the air gap place is not changed, thereby guarantee the stability of performance unshakable in one's determination as the stainless steel band lock ring of 16mm.Use the even coiling of enamelled wire of φ 1.8 then, the external insulation of coil adopts the epoxy casting structure, and the THICKNESS CONTROL of epoxy casting layer is about 10mm.Auxiliary products inside micro-water content is not exerted an influence, reduced assembly difficulty.The coil of this structure is not allowed to be subject to the external force influence and is out of shape in assembling and transport process, guaranteed that coil performance is stable.
Description of drawings:
Fig. 1 is the front view after iron core of the present invention is opened air gap;
Fig. 2 is the vertical view after iron core of the present invention is opened air gap;
Fig. 3 is the front view of coil wrapping of the present invention;
Fig. 4 is the vertical view of coil wrapping of the present invention;
Fig. 5 is the enlarged drawing at coil wrapping A of the present invention position;
Fig. 6 is the profile front view of current transformer of the present invention;
Fig. 7 is the profile vertical view of current transformer of the present invention.
Wherein: 1 is unshakable in one's determination; 2 is laminated epoxy glass-cloth board; 3 is stainless steel band; 4 for pricking button; 5 is enamelled wire; 6 is polyester film; 7 is the wrinkle cable paper; 8 is slim cotton band; 9 are the good coil of coiling; 10 is the poured with epoxy resin material.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1,2,3,4,5,6,7, a kind of secondary current is the TPY level current transformer of 5A, comprises that iron core, laminated epoxy glass-cloth board, stainless steel band and bundle buckle; Be symmetrically arranged with two width on the said iron core and be the air gap of 0.6-0.8mm; Be provided with laminated epoxy glass-cloth board in the said air gap; Said outer setting unshakable in one's determination has stainless steel band to buckle with pricking, and pricks button and pricks at stainless steel band outside.
Said bundle button outer setting has enamelled wire, and the enamelled wire outer surface is disposed with polyester film, wrinkle cable paper and slim cotton band from inside to outside.
Said secondary current is the preparation method of the TPY level current transformer of 5A, according to following steps:
(1) elder generation with the section embedding, is symmetrically arranged with the air gap that two width are 0.6-0.8mm with epoxy resin then on iron core;
(2) in air gap, be provided with laminated epoxy glass-cloth board, the adjustment width of air gap is 0.6-0.8mm;
(3) unshakable in one's determination with the stainless steel band lock ring, tighten stainless steel band with pricking button again;
(4), wrap up with polyester film, wrinkle cable paper and slim cotton band successively from inside to outside in the coil outside with the even coiling of enamelled wire.
(5) coil that bandages is poured into a mould with epoxy resin, the thickness of epoxy resin is 9-11mm.
The thickness of said step (1) epoxy resin is 1-2mm.Said step (2) adjustment width of air gap is 0.6-0.8mm.The thickness of said step (5) epoxy resin is 9-11mm.
For reducing the remanent magnetism of TPY level current transformer, with sequence number 1 mode of opening air gap that adopts unshakable in one's determination.The width of air gap will be adjusted very for a short time, and two air gap overall widths are controlled at about 1.4mm, and the width of each air gap is 0.6-0.8mm.Sequence number 1 iron core makes its one-tenths as a whole opening before the air gap earlier with epoxy resin the section embedding, can guarantee to cut the air gap back core like this and be not easy diffusing sheet.With band saw iron core is cut, use sequence number 2 laminated epoxy glass-cloth board pads then at the air gap place.Adjust the width (being controlled at about design load 0.7mm) of two air gaps, make it satisfy magnetic property requirement unshakable in one's determination.With sequence number 3 stainless steel band lock ring sequence numbers 1 iron core, prick button with sequence number 4 again and tighten sequence number 3 stainless steel bands, the air gap place is not changed, thereby guarantee the stability of performance unshakable in one's determination.Use the even coiling of sequence number 5 enamelled wires then, wrap up with insulating material such as sequence number 6 polyester films, sequence number 7 wrinkle cable papers, sequence number 8 slim cotton bands.The external insulation of coil adopts the epoxy casting structure, and the THICKNESS CONTROL of sequence number 10 poured with epoxy resin material is at 9-11mm.This structure does not receive the influence of micro-water content, and coil is not allowed to be subject to the external force influence and is out of shape in assembling and transport process, guaranteed that coil performance is stable.
When doing the current transformer test, adopt the alternating current method among GB16847-1997 " specification requirement of protective current transformer, transient characterisitics " the appendix B2.Because the secondary current of current transformer is 5A, coil needs when doing voltage-current characteristic that capacity is big, frequency the is low power supply of (5Hz or below the 5Hz) can provide enough big exciting current.Voltage-current characteristic through making coil obtains exciting characteristic curve, and the G-bar in 20% to 90% scope of saturation flux calculates magnetizing inductance.
Above content is to combine concrete preferred implementation to further explain that the present invention did; Can not assert that embodiment of the present invention only limits to this; Those of ordinary skill for technical field under the present invention; Under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to the present invention and confirm scope of patent protection by claims of being submitted to.
Claims (2)
1. the preparation method of the secondary current TPY level current transformer that is 5A is characterized in that, according to following steps:
(1) elder generation with section embedding unshakable in one's determination, is symmetrically arranged with the air gap that two width are 0.6-0.8mm with epoxy resin then on iron core;
(2) in air gap, be provided with laminated epoxy glass-cloth board, the adjustment width of air gap is 0.6-0.8mm;
(3) unshakable in one's determination with the stainless steel band lock ring, tighten stainless steel band with pricking button again;
(4), wrap up with polyester film, wrinkle cable paper and slim cotton band successively from inside to outside in the coil outside with the even coiling of enamelled wire;
(5) coil that bandages is poured into a mould with epoxy resin, the thickness of epoxy resin is 9-11mm.
2. secondary current is the preparation method of the TPY level current transformer of 5A according to claim 1, it is characterized in that: the thickness of said step (1) epoxy resin is 1-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101968327A CN101847502B (en) | 2010-06-10 | 2010-06-10 | Preparation method of TPY-level current transformer with secondary current of being 5A |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101968327A CN101847502B (en) | 2010-06-10 | 2010-06-10 | Preparation method of TPY-level current transformer with secondary current of being 5A |
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| CN101847502A CN101847502A (en) | 2010-09-29 |
| CN101847502B true CN101847502B (en) | 2012-07-25 |
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| CN2010101968327A Active CN101847502B (en) | 2010-06-10 | 2010-06-10 | Preparation method of TPY-level current transformer with secondary current of being 5A |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074343A (en) * | 2010-12-06 | 2011-05-25 | 保定天威集团有限公司 | Drying-free built-in type current transformer |
| CN103439534B (en) * | 2013-09-05 | 2016-04-20 | 苏州安泰变压器有限公司 | A kind of impedance means of high-voltage load test |
| CN106158343B (en) * | 2016-08-25 | 2018-08-17 | 河南森源电气股份有限公司 | The production method of Open Type Electric Current Mutual Inductor |
| CN109273211A (en) * | 2018-09-12 | 2019-01-25 | 海宁联丰东进电子有限公司 | A kind of electromagnetic component |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118347U (en) * | 1992-03-24 | 1992-10-07 | 林文广 | Distribution transformer |
| US5576921A (en) * | 1994-07-06 | 1996-11-19 | Vacuumschmelze Gmbh | Aggregate current transformer |
| US7307504B1 (en) * | 2007-01-19 | 2007-12-11 | Eaton Corporation | Current transformer, circuit interrupter including the same, and method of manufacturing the same |
| CN201242889Y (en) * | 2008-05-14 | 2009-05-20 | 江阴市华尔胜绝缘材料有限公司 | Epoxy laminated glass cloth board |
| CN201315220Y (en) * | 2008-11-20 | 2009-09-23 | 平高集团有限公司 | TPY-level transient current mutual inductor coil |
-
2010
- 2010-06-10 CN CN2010101968327A patent/CN101847502B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2118347U (en) * | 1992-03-24 | 1992-10-07 | 林文广 | Distribution transformer |
| US5576921A (en) * | 1994-07-06 | 1996-11-19 | Vacuumschmelze Gmbh | Aggregate current transformer |
| US7307504B1 (en) * | 2007-01-19 | 2007-12-11 | Eaton Corporation | Current transformer, circuit interrupter including the same, and method of manufacturing the same |
| CN201242889Y (en) * | 2008-05-14 | 2009-05-20 | 江阴市华尔胜绝缘材料有限公司 | Epoxy laminated glass cloth board |
| CN201315220Y (en) * | 2008-11-20 | 2009-09-23 | 平高集团有限公司 | TPY-level transient current mutual inductor coil |
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| CN101847502A (en) | 2010-09-29 |
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