CN208655382U - Generator outlet current mutual inductor special - Google Patents
Generator outlet current mutual inductor special Download PDFInfo
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- CN208655382U CN208655382U CN201821314147.8U CN201821314147U CN208655382U CN 208655382 U CN208655382 U CN 208655382U CN 201821314147 U CN201821314147 U CN 201821314147U CN 208655382 U CN208655382 U CN 208655382U
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- shell
- iron core
- mutual inductor
- secondary coil
- generator outlet
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Abstract
The utility model relates to field of electrical equipment, provide a kind of generator outlet current mutual inductor special, comprising: shell, iron core, secondary coil and the shield winding of secondary terminals and setting inside the shell；The shell is annular, and the external annulus of shell is arranged in the secondary terminals；One layer of copper foil is arranged in the internal ring wall of the shell, setting installation spring on the copper foil；The iron core is annular, and uniform winding secondary coil on iron core, the secondary coil is electrically connected with secondary terminals, and shield winding is wound on secondary coil；Wherein, shield winding includes 2 pairs of shielded coils of the quadrature arrangement on iron core circumference, and each shielding line encloses the 1/4 of iron core circumference；Dielectric is cast in the shell.The characteristics of the utility model can be carried out effectively anti-interference shielding, has internal diameter big, resists strong magnetic disturbance.
Description
Technical field
The utility model relates to field of electrical equipment more particularly to a kind of generator outlet current mutual inductor specials.
Background technique
Current transformer current transformer is that primary side high current is converted into the small electricity of secondary side according to electromagnetic induction principle
Stream is come the instrument that measures.Current transformer is made of the iron core and winding being closed.Its first side winding the number of turns is seldom, and string exists
In the route for the electric current for needing to measure.Current transformer is mainly used to be converted to the high current in alternating current circuit a certain proportion of
Low current, and then realize measurement and relay protection.
Generator usually needs to connect current transformer, and since generator outlet has electric current big, magnetic interference is big, manages
The current transformer of the big special nature of female diameter, generator outlet in the prior art uses traditional shield winding, outside
Metallic shield volume is big, weight is heavy, cost is too high, meanwhile, lead to mutual inductor poor anti jamming capability, Wen Shenggao, high magnetic measuring
The problems such as inaccurate.
Utility model content
The utility model mainly solves prior art current mutual inductor, and under the influence of high-intensity magnetic field, poor anti jamming capability causes
The not high technical problem of measurement accuracy, proposes a kind of generator outlet current mutual inductor special, using internal 4 sections of reversal connections shield around
The characteristics of group can effectively carry out anti-interference shielding, and mutual inductor has internal diameter big, resists strong magnetic disturbance.
The utility model provides a kind of generator outlet current mutual inductor special, comprising: shell, secondary terminals (1) with
And iron core, secondary coil (5) and the shield winding of setting inside the shell；
The shell is annular, and the external annulus of shell is arranged in the secondary terminals (1)；The internal ring wall of the shell is arranged
One layer of copper foil, setting installation spring (3) on the copper foil；
The iron core is annular, uniform winding secondary coil (5) on iron core, the secondary coil (5) and secondary terminals (1)
Electrical connection, and shield winding is wound on secondary coil (5)；Wherein, shield winding includes 2 pairs of the quadrature arrangement on iron core circumference
Shielded coil, each shielding line enclose the 1/4 of iron core circumference；
Dielectric (4) are cast in the shell.
Preferably, the material of the dielectric (4) is epoxy resin.
Preferably, the copper foil with a thickness of 0.1mm.
Preferably, setting installation base accessory (2) on the external annulus of the shell.
A kind of generator outlet current mutual inductor special provided by the utility model avoids three-phase using shield winding
It interferes, is enhanced to non-uniform electric field interference performance between electric current.Measuring accuracy can accomplish 0.1 grade, and temperature rise can achieve state
Mark requires, and non-maintaining, and product can full working scope operation.The utility model secondary winding can with polytropic ratio, in substation's increase-volume,
Mutual inductor replacement can be reduced in track remodelling.The utility model mutual inductor capacity is big, service life extends, and adapts to power grid and changes
It makes, transformer increase-volume, the demand of lines escalation reduces the replacement of equipment.The utility model is pouring product, technical maturity,
It can be with mass production.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of generator outlet current mutual inductor special provided by the utility model；
Fig. 2 is the side view of generator outlet current mutual inductor special provided by the utility model；
Fig. 3 is the structural schematic diagram of shield winding；
Fig. 4 is the schematic illustration of shield winding.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that described herein
Specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It also should be noted that being
Convenient for description, part relevant to the utility model is illustrated only rather than full content in attached drawing.
Fig. 1 is the structural schematic diagram of generator outlet current mutual inductor special provided by the utility model；Fig. 2 is that this is practical
The side view of the generator outlet current mutual inductor special of novel offer.As shown in Figure 1, 2, provided by the embodiment of the utility model
Generator outlet current mutual inductor special, comprising: shell, iron core, the secondary coil 5 of secondary terminals 1 and setting inside the shell
And shield winding.
The shell is annular, and the external annulus of shell is arranged in the secondary terminals 1；The internal ring wall setting one of the shell
Layer copper foil, setting installation spring 3 on the copper foil；Wherein, copper foil with a thickness of 0.1mm, the effect of copper foil is mainly in high electricity
Field strength inside pressure shielding mutual inductor.The external annulus of shell also sets up the installation base accessory 2 for installation.
To be annular, uniform winding secondary coil 5 on iron core, the secondary coil 5 is electrically connected the iron core with secondary terminals 1
It connects, and winds shield winding on secondary coil 5.Fig. 3 is the structural schematic diagram of shield winding.Fig. 4 is that the principle of shield winding is shown
It is intended to.As shown in Figure 3,4, shield winding is that 2 pairs of shielded coils of the quadrature arrangement on ring-shaped core circumference are constituted, each shielding
Coil accounts for the 1/4 of iron core circumference.The connection of two pairs of shielded coils in Fig. 3 is respectively equivalent to be mutually the low magnetic of 2 open-flux paths of short circuit
Cipher telegram current transformer, according to mutual inductor principle, an ampere-turn is the magnetic difference of potential, secondary ampere-turn therewith substantially numerical value on the contrary, just
Good balance external carrys out magnetic potential, plays a part of shielding iron core, to play anti-interference ability.The line footpath of shield winding, resistance including
Current value of the shield winding under a rated current is all can be by calculating, practicing to obtain, and the temperature rise of simulation test all exists
Within the scope of national standard, to solve the problems, such as generator interface current transformer poor anti jamming capability, Wen Shenggao.
Dielectric 4 is cast in the shell, the material of dielectric 4 is epoxy resin, and dielectric 4 is capable of increasing
Creep distance improves filthy ability.The utility model mutual inductor iron core uses high-quality low magnetism leakage silicon steel sheet annular iron core.Iron core shell is adopted
With white steel protective case, iron core performance is improved.
The current transformer of the utility model, electric current can accomplish 25000/5 than maximum, fully meet generator outlet electricity
Flow big demand.Winding precision highest can accomplish 0.1 grade.The utility model is measured around component meter, protection.Shield winding can be with
Accomplish 4 coils.15000/5 or more current transformer uses shield winding, avoids and interferes between three-phase current, enhances pair
Non-uniform electric field interference performance.The utility model mutual inductor capacity is big, adaptation electric network reconstruction, transformer increase-volume, lines escalation
Demand reduces the replacement of equipment.The minimum discharge capacity of product can accomplish 10Pc hereinafter, extending the service life of product.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is modified the technical solutions described in the foregoing embodiments, or to some or all of the technical features
It is equivalently replaced, the scope of the technical solutions of the embodiments of the utility model that it does not separate the essence of the corresponding technical solution.
Claims (4)
1. a kind of generator outlet current mutual inductor special characterized by comprising shell, secondary terminals (1) and setting exist
Iron core, secondary coil (5) and shield winding in shell；
The shell is annular, and the external annulus of shell is arranged in the secondary terminals (1)；The internal ring wall of the shell is arranged one layer
Copper foil, setting installation spring (3) on the copper foil；
To be annular, uniform winding secondary coil (5) on iron core, the secondary coil (5) is electrically connected the iron core with secondary terminals (1)
It connects, and winds shield winding on secondary coil (5)；Wherein, shield winding includes 2 pairs of shieldings of the quadrature arrangement on iron core circumference
Coil, each shielding line enclose the 1/4 of iron core circumference；
Dielectric (4) are cast in the shell.
2. generator outlet current mutual inductor special according to claim 1, which is characterized in that the dielectric (4)
Material be epoxy resin.
3. generator outlet current mutual inductor special according to claim 1, which is characterized in that the copper foil with a thickness of
0.1mm。
4. generator outlet current mutual inductor special according to claim 1, which is characterized in that the external annulus of the shell
Base accessory (2) are installed in upper setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821314147.8U CN208655382U (en) | 2018-08-15 | 2018-08-15 | Generator outlet current mutual inductor special |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821314147.8U CN208655382U (en) | 2018-08-15 | 2018-08-15 | Generator outlet current mutual inductor special |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208655382U true CN208655382U (en) | 2019-03-26 |
Family
ID=65789733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821314147.8U Active CN208655382U (en) | 2018-08-15 | 2018-08-15 | Generator outlet current mutual inductor special |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208655382U (en) |
-
2018
- 2018-08-15 CN CN201821314147.8U patent/CN208655382U/en active Active
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