CN206471200U - A kind of earthed voltage transformer suitable for switchette cabinet - Google Patents
A kind of earthed voltage transformer suitable for switchette cabinet Download PDFInfo
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- CN206471200U CN206471200U CN201720024400.5U CN201720024400U CN206471200U CN 206471200 U CN206471200 U CN 206471200U CN 201720024400 U CN201720024400 U CN 201720024400U CN 206471200 U CN206471200 U CN 206471200U
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Abstract
The utility model discloses a kind of earthed voltage transformer suitable for switchette cabinet, including epoxy resin housing, and it is coated on integral type iron core, first winding, secondary winding and opening insulation framework in epoxy resin housing, secondary winding is directly wound on integral type iron core, the insulation framework that is open side forms opening, the insulation framework that is open is by the opening sleeve outside secondary winding, first winding, first winding interlayer and secondary winding interlayer insulation paper insulation are wound with opening insulation framework.The utility model reduces the appearance and size of earthed voltage transformer, maintains precision and output capacity under former large scale.
Description
Technical field
The utility model is related to earthed voltage transformer, and a kind of more particularly to ground voltage suitable for switchette cabinet is mutual
Sensor.
Background technology
Switch cubicle is one of power industry key equipment, and the earthed voltage transformer in switch cubicle is electrical secondary system
Voltage is provided for measuring and protecting, is equipment essential in switch cubicle.
Limited by space and cost, the switch cubicle size of power industry design can be less and less, this, which gives, is arranged on inside
Component cause obstruction spatially.According to its associated specifications, the indoor AC metal closed PT hands of 10KV in existing industry
Stopping switch cabinet minimum width dimension is 550mm, and the transformer shown for phase-to-ground voltage insulation prison is 3 one groups, bind mode
For star-connection.To meet its electric insulation distance and creep age distance, the phase spacing of earthed voltage transformer is 150mm wide, former
The pour mass width of earthed voltage transformer design is 148mm.But, limited sometimes by in-site installation place size, switch cubicle
Reserved installing space is smaller, therefore switchgear plant proposes the PT switch cubicles that meter width is 500mm at present, it is desirable to transformer connection side
Formula is constant, and also need guarantee earthed voltage transformer is mutually smaller than 140mm, therefore former width is mutual for 148mm ground voltage
Sensor can not be installed.
As shown in figure 1, conventional ground connection earthed voltage transformer is using cutting iron core 10, secondary winding 20 is first using in insulation
The mode coiling supported on skeleton 30, then by first winding 40 directly the coiling in secondary winding 20, after be inserted in cutting iron together
Wherein the one of core 10 is half of, will finally cut in another half of docking of iron core 10.Such a assembling mode, due to using cutting iron
There is insulation framework 30 between core 10, and secondary winding 20 and cutting iron core 10, seam can be produced between iron core and secondary winding 20
Gap, increases unloaded leakage magnetic flux and no-load current, if it is possible to which this is improved, then can keep precision and output capacity
On the premise of reduce earthed voltage transformer appearance and size.So as to obtain width for 130mm, while satisfaction is with former width again
The horizontal 12/42/75kV of 148mm voltage transformer same dielectrics and technical parameter product.
In view of this, I is improved to transformer contour structures, and especial manufacture goes out a kind of suitable for switchette cabinet
Earthed voltage transformer, thus this case produce.
Utility model content
A kind of earthed voltage transformer suitable for switchette cabinet that the utility model is provided, reduces ground voltage mutual
The appearance and size of sensor, maintains the precision and output capacity under former large scale.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of earthed voltage transformer suitable for switchette cabinet, including epoxy resin housing, and it is coated on epoxy
Integral type iron core, first winding, secondary winding and opening insulation framework in resin-case, secondary winding is directly around the home in one
On formula iron core, opening insulation framework side forms opening, and opening insulation framework is located at outside secondary winding by the opening sleeve, opening
First winding, first winding interlayer and secondary winding interlayer insulation paper insulation are wound with insulation framework.
Insulating gas is full of at the insulating paper.
The insulating gas is SF6.
The insulating paper is kraft capacitor paper.
After such scheme, the utility model using cutting iron core, does not reduce the loss of iron core, and directly will be secondary
Winding technique reduces the external diameter of secondary winding on integral type iron core, eliminates between secondary winding and integral type iron core
Gap, reduces unloaded leakage magnetic flux, reduces no-load current, reduce no-load error.Due to reducing no-load current, therefore can
Reduce the sectional area of first winding coiling, while the coiling of first winding is supported by opening insulation framework, first winding around
The reduction of the sectional area of line, so as to reduce the external diameter of first winding, and then reduces the size of whole earthed voltage transformer, simultaneously
The precision and output capacity of earthed voltage transformer are not reduced again.
As a further improvement, insulating gas is full of also at the insulating paper of first winding interlayer and secondary winding interlayer,
Therefore the insulating paper general thickness that the thickness of insulating paper, particularly first winding interlayer can also be reduced is thicker, therefore reduce
Thickness is particularly evident.
Brief description of the drawings
Fig. 1 is the structural representation of prior art；
Fig. 2 is the structural representation of the present embodiment；
Fig. 3 be the present embodiment on integral type iron core around the first winding and the structural representation of secondary winding made.
Label declaration
Cut iron core 10, secondary winding 20, insulation framework 30, first winding 40；
Epoxy resin housing 1, integral type iron core 2, first winding 3, secondary winding 4, be open insulation framework 5, opening 51, electricity
Container paper 6.
Embodiment
In order to which the technical solution of the utility model is explained further, the utility model is entered below by specific embodiment
Row is elaborated.
As shown in Fig. 2 be a kind of earthed voltage transformer suitable for switchette cabinet that the utility model is disclosed, including
Epoxy resin housing 1, and be coated in epoxy resin housing 1 integral type iron core 2, first winding 3, secondary winding 4 and open
Mouth insulation framework 5.As shown in figure 3, secondary winding 4 is directly wound on integral type iron core 2, opening insulation framework 5 side is formed
Opening 51, opening insulation framework 5 be sheathed on by the opening 51 outside secondary winding 4, opening insulation framework 5 on coiling once around
Group 3, the interlayer of first winding 3 and the interlayer electricity container paper 6 of secondary winding 4 insulate.SF6 gases are full of wherein at kraft capacitor paper 6.By
Iron core is cut in not using, therefore reduces the loss of iron core, and directly secondary winding 4 is wound on integral type iron core 2, no
The external diameter of secondary winding 4 is reduced by only, the gap between secondary winding 4 and integral type iron core 2 is also eliminated, unloaded leakage is reduced
Magnetic flux, reduces no-load current, reduces no-load error.Due to reducing no-load current, therefore the coiling of first winding 3 can be reduced
Sectional area, reduce first winding 3 external diameter.
The coiling of first winding 3 simultaneously supported by opening insulation framework 5, and the sectional area of the coiling of first winding 3 subtracts
It is small, further reduce the external diameter of first winding 3.
SF6 insulating gas, therefore capacitor are full of also at the insulating paper of the interlayer of first winding 3 and the interlayer of secondary winding 4
The thickness of paper 6 can also reduce 30% or so, replace reducing due to reducing the thickness of kraft capacitor paper 6 by SF6 insulating gas
Layer insulation.The general thickness of kraft capacitor paper 6 of the particularly interlayer of first winding 3 is thicker, therefore the thickness of reduction is particularly evident, from
And further reduce the external diameter of first winding 3.
Thus, you can the size of the whole earthed voltage transformer of reduction, while not reducing former earthed voltage transformer again
Precision and output capacity.
The preparation method that the present embodiment also provides a kind of above-mentioned earthed voltage transformer suitable for switchette cabinet, including
Following steps：
The first step, secondary winding 4 is directly wound on integral type iron core 2, during coiling, the interlayer coiling one of secondary winding 4
Layer capacitor paper 6；
Second step, is being arranged the opening step of insulation framework 5 the 3rd, in opening insulation framework 5 outside the secondary winding 4 made
Coiling first winding 3, during coiling, the layer capacitor paper 6 of 3 interlayer coiling of first winding one；
4th step, by first winding 3, secondary winding 4, integral type iron core 2 and the opening insulation bone of above-mentioned coiling together
Frame 5, which is placed in, to be poured in injection molding tool, then casting mold is vacuumized and SF6 gases are injected, and is then poured into epoxy resin, is completed epoxy
Resin-cast.
The present embodiment is due to when making, by being vacuumized casting mold and injecting SF6 gas gas, then pouring into ring
Oxygen tree fat, so that being full of SF6 gases at the kraft capacitor paper 6 of the interlayer of first winding 3 and the interlayer of secondary winding 4, therefore is used
Simple manufacture craft can complete the making of the present embodiment earthed voltage transformer.
After such scheme, you can it is 130mm that width, which is made, while it is 148mm mutual induction of voltage to meet with former width again
The horizontal 12/42/75kV of device same dielectric and technical parameter product.
Preferred embodiment of the present utility model is these are only, not to the restriction of protection domain of the present utility model.It is all according to
The equivalent variations that the mentality of designing of this case is done, each fall within the protection domain of this case.
Claims (4)
1. a kind of earthed voltage transformer suitable for switchette cabinet, it is characterised in that：Including epoxy resin housing, and bag
The integral type iron core that overlays in epoxy resin housing, first winding, secondary winding and opening insulation framework, secondary winding directly around
System is on integral type iron core, and opening insulation framework side forms opening, opening insulation framework by the opening sleeve located at it is secondary around
Group is outer, and first winding, first winding interlayer and secondary winding interlayer insulation paper insulation are wound with opening insulation framework.
2. a kind of earthed voltage transformer suitable for switchette cabinet as claimed in claim 1, it is characterised in that：It is described exhausted
Insulating gas is full of at edge paper.
3. a kind of earthed voltage transformer suitable for switchette cabinet as claimed in claim 2, it is characterised in that：It is described exhausted
Edge gas is SF6.
4. a kind of earthed voltage transformer suitable for switchette cabinet as claimed in claim 1, it is characterised in that：It is described exhausted
Edge paper is kraft capacitor paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720024400.5U CN206471200U (en) | 2017-01-10 | 2017-01-10 | A kind of earthed voltage transformer suitable for switchette cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720024400.5U CN206471200U (en) | 2017-01-10 | 2017-01-10 | A kind of earthed voltage transformer suitable for switchette cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471200U true CN206471200U (en) | 2017-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720024400.5U Active CN206471200U (en) | 2017-01-10 | 2017-01-10 | A kind of earthed voltage transformer suitable for switchette cabinet |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847475A (en) * | 2017-01-10 | 2017-06-13 | 厦门大互科技有限公司 | A kind of earthed voltage transformer suitable for switchette cabinet and preparation method thereof |
| CN111354552A (en) * | 2018-12-24 | 2020-06-30 | 深圳迈瑞生物医疗电子股份有限公司 | Wire pack group, high-voltage wire pack, high-voltage generator and X-ray photographing system |
-
2017
- 2017-01-10 CN CN201720024400.5U patent/CN206471200U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106847475A (en) * | 2017-01-10 | 2017-06-13 | 厦门大互科技有限公司 | A kind of earthed voltage transformer suitable for switchette cabinet and preparation method thereof |
| CN111354552A (en) * | 2018-12-24 | 2020-06-30 | 深圳迈瑞生物医疗电子股份有限公司 | Wire pack group, high-voltage wire pack, high-voltage generator and X-ray photographing system |
| CN111354552B (en) * | 2018-12-24 | 2024-02-27 | 深圳迈瑞生物医疗电子股份有限公司 | Coil pack, high-voltage coil, high-voltage generator and X-ray photography system |
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