CN208444730U - A kind of current transformer applied to large-scale generator - Google Patents
A kind of current transformer applied to large-scale generator Download PDFInfo
- Publication number
- CN208444730U CN208444730U CN201820765085.6U CN201820765085U CN208444730U CN 208444730 U CN208444730 U CN 208444730U CN 201820765085 U CN201820765085 U CN 201820765085U CN 208444730 U CN208444730 U CN 208444730U
- Authority
- CN
- China
- Prior art keywords
- iron core
- metal
- layer
- screen layer
- metal screen
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- 229910052751 metal Inorganic materials 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 53
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000005259 measurement Methods 0.000 abstract description 6
- 206010037660 Pyrexia Diseases 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 35
- 230000004907 flux Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a kind of current transformers applied to large-scale generator, including iron core (1) and metal wrapping wire (4), metal wrapping wire (4) is wound along iron core (1) circumferencial direction sequence, there is one layer of non-magnetic metal screen layer (3) between the metal wrapping wire (4) and iron core (1), metal screen layer (3) has the pass through openings (5) along iron core circumferential direction, and one layer of insulation crimped paper (2) is enclosed between metal screen layer (3) and iron core (1).To solve the problem of in the prior art since external magnetic field causes to will lead to fever seriously when measurement is inaccurate serious and then burns mutual inductor.
Description
Technical field
The utility model relates to power tool field more particularly to a kind of current transformers applied to large-scale generator.
Background technique
The size of current great disparity in the route of power generation, power transformation, transmission of electricity, distribution and electricity consumption has from several peaces to tens of thousands of Andu.For
Need to be converted to the unified electric current of comparison convenient for measurement, protection and control, in addition the voltage on route is generally relatively high, such as straight
It is breakneck for connecing measurement.Current transformer just plays the role of current transformation and electrical isolation.
In large-scale generator, current transformer can be used to measure once winding current, but due to large-scale generator
Rated current is larger, in the lesser situation of mutual spacing, closes on magnetic field and is affected to mutual inductor, be easy to cause mutual inductor
Core sataration, is not allowed first is that will lead to measurement, will lead to fever when second is that serious seriously and then burns mutual inductor.
Summary of the invention
Technical problem to be solved by the utility model is: providing a kind of current transformer applied to large-scale generator, have
There is the ability of anti-external magnetic field interference, is easy with solving mutual inductor in the prior art by external magnetic fields, first is that will lead to survey
The problem of amount is inaccurate, will lead to fever when second is that serious seriously and then burns mutual inductor.
The technical solution of the utility model is: a kind of current transformer applied to large-scale generator, including iron core and gold
Belong to wrapping wire, metal wrapping wire is wound along iron core circumferencial direction sequence, there is one layer of non-magnetic gold between the metal wrapping wire and iron core
Belong to shielded layer, metal screen layer has an opening penetrated through along the circumferencial direction of iron core ring, wraps up between metal screen layer and iron core
There is one layer of insulation crimped paper.
The opening of the metal screen layer is located at iron core side.
The opening of the metal screen layer is covered by insulating resin.
Metal screen layer between the metal wrapping wire and iron core is copper.
The beneficial effects of the utility model are:
Compared with prior art, the utility model between metal wrapping wire and iron core by adding one layer of non-magnetic side to have
There is the metal screen layer of pass through openings, and add insulation crimped paper in iron core and metallic shield interlayer, realizes to magnetic outside iron core
The isolation of field, and ensure that and do not change before measuring coil interior flux relatively installs additional, so that measurement result is accurate and reliable.
On this basis the utility model using copper as metallic shield cover material, both ensure that good external magnetic field every
From effect, the cheap of cost is in turn ensured.
In addition insulate crimped paper used in the utility model, also acts buffering ambient pressure, avoids metallic shield
The effect of rupture because outside mutual inductor metal wrapping wire can added with some insulating resins as insulating layer, insulating resin often by
It heat and is cooled, leads to its volume expansion and contraction, to generate compressing to internal metal screen layer.
The utility model is due to solving in the prior art due to mutual inductance with good anti-mutual inductor external magnetic field characteristic
Device external magnetic field causes measurement inaccurate, will lead to fever serious the problem of burning mutual inductor in turn when serious.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model.
Fig. 2 is the utility model main view.
In figure: 1 iron core, 2 insulation crimped papers, 3 metallic shields, 4 metal wrapping wires.
Specific embodiment
With reference to the accompanying drawing and utility model is described further in specific embodiment:
With reference to Fig. 1-2, a kind of current transformer applied to large-scale generator of the utility model, including iron core 1 and metal
Wrapping wire 4, iron core are iron core used in common mutual inductor, and metal wrapping wire 4 winds along iron core utility model 1 circumferencial direction sequence, twines
Consistent with common mutual inductor around mode, metal wrapping wire 4 is the copper material wire of common mutual inductor, metal wrapping wire 4 and iron core 1
Between have one layer of non-magnetic metal screen layer 3, the preferred metal screen layer 3 is copper, and metal screen layer may be aluminium
Etc. other non-magnetic metals of conduction.Metal screen layer 3 has an opening 5 along the perforation of 1 circumferencial direction of iron core, metal screen layer 3
Opening 5 be located at 1 side of iron core, this is done because be located at mutual inductor side external magnetic field it is less, the opening of metal screen layer 3
Covered at 5 by insulating resin, the purpose for the arrangement is that allow opening 5 both ends 3 mutually insulated of metal screen layer, avoid metallic shield
Layer 3 generates internal circulation under the action of interior flux and burns metal screen layer 3.It is enclosed between metal screen layer 3 and iron core 1
One layer of insulation crimped paper 2, insulation crimped paper 2 are the common insulation crimped paper 2 being often used in transformer.
In use, on external action of alternating magnetic field to metal screen layer 3, work of 3 surface of metal screen layer in alternating magnetic field
Felt with the lower induced current generated perpendicular to magnetic field by Lenz's law it is recognised that induced current has such direction
It answers the magnetic field of electric current always to hinder the variation for causing faradic magnetic flux, is achieved that metallic shield in this way
The shielding of 3 external magnetic field of layer.Since the needs of metal screen layer 3 are used with high conductivity and non-magnetic metal material, copper are
Common high conductivity and non-magnetic metal material in nature, and relative low price, preferred the utility model make
Use copper material as the making material of metal screen layer 3.It is all metal additionally, due to iron core 1 and metal screen layer 3, if directly
It contacts with each other, even if there is pass through openings 5 on metal screen layer 3, since 1 internal magnetic flux of iron core changes, metal screen layer 3 is surrounded
The circumferential direction of iron core 1 is access, so will form internal circulation, adding this insulation its first purpose of crimped paper 2 is exactly to avoid the formation of
Internal circulation.
Another purpose for adding insulation crimped paper 2 is, since mutual inductor metal wrapping wire 4 outside can be added with some insulating resins
As insulating layer, insulating resin is often heated and is cooled, and leads to its volume expansion and contraction, thus to internal metallic shield
Layer 3 generates compressing, it is therefore desirable to insulation crimped paper 2 be added between metal screen layer 3 and iron core as buffering.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (4)
1. a kind of current transformer applied to large-scale generator, including iron core (1) and metal wrapping wire (4), metal wrapping wire (4) edge
Iron core (1) circumferencial direction sequence wind, it is characterised in that: have between the metal wrapping wire (4) and iron core (1) one layer it is non-magnetic
Metal screen layer (3), metal screen layer (3) have an opening (5) penetrated through along the circumferencial direction of iron core (1) ring, metal screen layer
(3) one layer of insulation crimped paper (2) is enclosed between iron core (1).
2. a kind of current transformer applied to large-scale generator according to claim 1, it is characterised in that: the metal
The opening (5) of shielded layer (3) is located at iron core (1) side.
3. a kind of current transformer applied to large-scale generator according to claim 1, it is characterised in that: the metal
It is covered at the opening (5) of shielded layer (3) by insulating resin.
4. a kind of current transformer applied to large-scale generator according to claim 1, it is characterised in that: the metal
Metal screen layer (3) between wrapping wire (4) and iron core (1) is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820765085.6U CN208444730U (en) | 2018-05-22 | 2018-05-22 | A kind of current transformer applied to large-scale generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820765085.6U CN208444730U (en) | 2018-05-22 | 2018-05-22 | A kind of current transformer applied to large-scale generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208444730U true CN208444730U (en) | 2019-01-29 |
Family
ID=65091159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820765085.6U Active CN208444730U (en) | 2018-05-22 | 2018-05-22 | A kind of current transformer applied to large-scale generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208444730U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735484A (en) * | 2018-05-22 | 2018-11-02 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of current transformer structure applied to high-rating generator |
-
2018
- 2018-05-22 CN CN201820765085.6U patent/CN208444730U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108735484A (en) * | 2018-05-22 | 2018-11-02 | 贵州乌江水电开发有限责任公司构皮滩发电厂 | A kind of current transformer structure applied to high-rating generator |
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