CN203134545U - Mini-type current transformer with strong magnetism resistance - Google Patents
Mini-type current transformer with strong magnetism resistance Download PDFInfo
- Publication number
- CN203134545U CN203134545U CN 201320124856 CN201320124856U CN203134545U CN 203134545 U CN203134545 U CN 203134545U CN 201320124856 CN201320124856 CN 201320124856 CN 201320124856 U CN201320124856 U CN 201320124856U CN 203134545 U CN203134545 U CN 203134545U
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- magnetism
- outer casing
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- isolation cover
- transformer
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Abstract
The utility model provides a mini-type current transformer with strong magnetism resistance. The current transformer comprises an outer casing, wherein a solenoid and a magnetism isolation cover are arranged inside the outer casing; the magnetism isolation cover is arranged along the side wall and the bottom of the outer casing; the solenoid is arranged inside the magnetism isolation cover; a center post is arranged in the outer casing; the center post extends from the bottom of the outer casing to the top; two ends of the center post are through; the solenoid surrounds the outside of the center cost, and a leading-outer wire of the solenoid is welded in the outer casing and then stretches out; the magnetism isolation cover is made of an iron magnetic conducting material, an open pore is arranged at the bottom of the magnetism isolation cover, and the center post is sleeved with the magnetism isolation cover through the open pore; and the outer wall of the magnetism isolation cover is closely attached to the inner wall of the outer casing. According to the mini-type current transformer with strong magnetism resistance, the solenoid and the outer casing are separated by the magnetism isolation cover, a better isolation effect is provided for an external strong magnetic field, an electric energy meter can be prevented from being disturbed by an external magnetic field, measurement reading drifts and invalidation can be avoided, the outer casing is insulated, both the shape and the central hole size are in consistent with those of conventional transformers which are massively used and have no strong magnetism resistance function, the conventional transformers can be directly replaced, and a conventional electric energy meter and related accessories of the conventional electric energy meter do not need any change, the mini-type current transformer is convenient to use, and the cost is saved.
Description
Technical field
The utility model relates to instrument transformer, relates in particular to a kind of anti-strong magnetic micro-transformer of current.
Background technology
Instrument transformer (instrument transformer) is the equipment of scaling transformation voltage or electric current; its function mainly is that high voltage or big electric current scaling transformation are become standard low-voltage or the little electric current of standard; in order to realize standardization, the miniaturization of measuring instrument, protection equipment and automatic control equipment; also can be used to separate high-voltage system simultaneously, to guarantee the safety of the person and equipment.
The micro-transformer of current that current state net ammeter generally uses, the function of anti-outside strong magnetic does not exist after ammeter is installed and utilizes strong magnetic stealing or ruined hidden danger.Visible anti-strong magnetic current transducers on the market, its measure of adopting is the metal shell that plastic casing is changed into magnetic conduction, the center is circular hole, have certain antimagnetic interference function, but can't be in the electric energy meter of existing a large amount of uses directly install, between the supporting magnetic latching relay terminal of its shell and ammeter, and the insulating properties between other electronic devices and components of periphery is difficult to guarantee, as adopt alternate manner to install, and institute takes up space big, and therefore cost also can improve greatly.New state's network mark standard has proposed clear and definite requirement to the strong magnetic in anti-outside of instrument transformer, requires to apply the magnetic field of 300mT in the watchcase outside of three-phase electric energy meter and ammeter keeps running well and precision meets the requirements.Therefore, under the constant prerequisite of ammeter structure, mounting means, be necessary the structure of existing instrument transformer is improved, to satisfy above-mentioned requirements.
The utility model content
The purpose of this utility model provides a kind of anti-strong magnetic micro-transformer of current, do not change under the prerequisite of its structure and accessory mounting structure at state's net three-phase electric energy meter guaranteeing, instrument transformer can directly be installed and used, and avoids electric energy meter lost efficacy because of the serious drift of instrument transformer parameter under disturbing by the external magnetic field.
The utility model is that the technical scheme that its technical problem of solution adopts is,
Anti-strong magnetic micro-transformer of current, include shell, be provided with line bag and magnetism shielding hood in the shell, magnetism shielding hood arranges along side wall of outer shell and bottom, and the line bag places in the magnetism shielding hood, has center pillar in the shell, this center pillar extends to the top from outer casing bottom, the center pillar two ends connect, and line surrounds around the center pillar arranged outside, and its lead-out wire stretches out after welding in the enclosure;
Magnetism shielding hood is made by the irony permeability magnetic material, and its bottom has perforate, and is placed on the center pillar by this perforate, and the outer wall of magnetism shielding hood is close to the inwall of shell;
Be provided with insulation spacer in the shell, between the online bag of this insulation spacer and the magnetism shielding hood;
Offer through hole on the center pillar, therefrom pass and locate with convenient terminal;
Through hole is cross or in-line or circle;
In an embodiment of the present utility model, shell is made by insulating material, its open top, and enclosure is filled the back by epoxy glue and by cover plate opening is sealed, and cover plate is by insulating material or the moulding of irony permeability magnetic material;
In another embodiment of the present utility model, shell is made by insulating material, and cover plate is not used in its open top, and directly by the epoxy glue embedding.
Advantage of the present utility model is, this instrument transformer adopts magnetism shielding hood that line bag and shell are separated, and perfusion epoxy glue, outside high-intensity magnetic field is played buffer action preferably, make electric energy meter avoid the interference of external magnetic field and metering reading drift takes place even lost efficacy, and because shell insulate, profile is all consistent with the instrument transformer of existing a large amount of strong magnetic functions of using of nonreactive with central hole size, therefore can directly replace, and existing electric energy meter and related accessory thereof need not to do any change, it is quite convenient to use, and saves cost simultaneously.
Description of drawings
Fig. 1 is the generalized section of the anti-strong magnetic current transducers that the utility model proposes;
Fig. 2 is the external structure schematic diagram of this instrument transformer.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with illustrating and specific embodiment, further set forth the utility model.
As shown in Figure 1 and Figure 2, the anti-strong magnetic micro-transformer of current that the utility model proposes includes shell 1, be provided with line bag 2 and magnetism shielding hood 3 in the shell 1, magnetism shielding hood 3 arranges along sidewall and the bottom of shell 1, and line bag 2 places in the magnetism shielding hood 3, has center pillar 4 in the shell 1, this center pillar 4 extends to the top from the bottom of shell 1, center pillar 4 two ends connect, and line bag 2 is around center pillar 4 arranged outside, and its lead-out wire 5 stretches out after welding in shell 4;
Offer through hole 7 on the center pillar 4, therefrom pass and locate with convenient supporting magnetic latching relay terminal; Through hole can be set to cross or in-line or circle, and in the present embodiment, this through hole 7 is cross;
In the present embodiment, shell 1 is made by insulating material, its open top, and shell 1 inside is filled the back by epoxy glue 8 and by cover plate 9 opening is sealed, and cover plate 9 is by insulating material or the moulding of irony permeability magnetic material;
In another embodiment, shell 1 is made by insulating material, and its open top is without cover plate, directly by the epoxy glue embedding.
This instrument transformer adopts magnetism shielding hood that line bag and shell are separated, and perfusion epoxy glue, outside high-intensity magnetic field is played buffer action preferably, make electric energy meter avoid the interference of external magnetic field and metering reading drift takes place even lost efficacy, and because shell insulate, profile and central hole size are all consistent with the instrument transformer of the strong magnetic functions of nonreactive of existing a large amount of uses, therefore can directly replace, and existing electric energy meter and related accessory thereof need not to do any change, and it is quite convenient to use, and saves cost simultaneously.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope; such as turn magnetism shielding hood around placement; perhaps magnetism shielding hood changes into by an annulus and a base plate and replacing; the perhaps directly sealing without cover plate; etc., these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (7)
1. resist strong magnetic micro-transformer of current, it is characterized in that, include shell, be provided with line bag and magnetism shielding hood in the shell, magnetism shielding hood arranges along side wall of outer shell and bottom, the line bag places in the magnetism shielding hood, have center pillar in the shell, this center pillar extends to the top from outer casing bottom, and the center pillar two ends connect, line surrounds around the center pillar arranged outside, and its lead-out wire stretches out after welding in the enclosure.
2. anti-strong magnetic micro-transformer of current according to claim 1 is characterized in that magnetism shielding hood is made by the irony permeability magnetic material, and its bottom has perforate, and is placed on the center pillar by this perforate, and the outer wall of magnetism shielding hood is close to the inwall of shell.
3. anti-strong magnetic micro-transformer of current according to claim 1 is characterized in that, is provided with insulation spacer in the shell, between the online bag of this insulation spacer and the magnetism shielding hood.
4. anti-strong magnetic micro-transformer of current according to claim 1 is characterized in that, offers through hole on the center pillar, therefrom passes and locatees with convenient terminal.
5. anti-strong magnetic micro-transformer of current according to claim 4 is characterized in that through hole is cross or in-line or circle.
6. anti-strong magnetic micro-transformer of current according to claim 1 is characterized in that shell is made by insulating material, its open top, and enclosure is filled the back by epoxy glue and by cover plate opening is sealed.
7. anti-strong magnetic micro-transformer of current according to claim 6 is characterized in that cover plate is by insulating material or the moulding of irony permeability magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320124856 CN203134545U (en) | 2013-03-18 | 2013-03-18 | Mini-type current transformer with strong magnetism resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320124856 CN203134545U (en) | 2013-03-18 | 2013-03-18 | Mini-type current transformer with strong magnetism resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203134545U true CN203134545U (en) | 2013-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320124856 Expired - Fee Related CN203134545U (en) | 2013-03-18 | 2013-03-18 | Mini-type current transformer with strong magnetism resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203134545U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890200A (en) * | 2019-11-05 | 2020-03-17 | 浙江永泰隆电子股份有限公司 | Mutual inductor, packaging manufacturing method thereof and electric instrument thereof |
-
2013
- 2013-03-18 CN CN 201320124856 patent/CN203134545U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890200A (en) * | 2019-11-05 | 2020-03-17 | 浙江永泰隆电子股份有限公司 | Mutual inductor, packaging manufacturing method thereof and electric instrument thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20190318 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |