CN207116212U - A kind of current transformer of polytropic ratio - Google Patents

A kind of current transformer of polytropic ratio Download PDF

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Publication number
CN207116212U
CN207116212U CN201721129074.0U CN201721129074U CN207116212U CN 207116212 U CN207116212 U CN 207116212U CN 201721129074 U CN201721129074 U CN 201721129074U CN 207116212 U CN207116212 U CN 207116212U
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CN
China
Prior art keywords
core coil
secondary iron
ratio
winding
iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201721129074.0U
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Chinese (zh)
Inventor
朱崇健
杨君祥
刘友娟
侯祥玉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SICHUAN TAIKE APPERATUS CO Ltd
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SICHUAN TAIKE APPERATUS CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN201721129074.0U priority Critical patent/CN207116212U/en
Application granted granted Critical
Publication of CN207116212U publication Critical patent/CN207116212U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model belongs to current transformer technical field, discloses a kind of current transformer of polytropic ratio, for solving the problems, such as that current transformer can not meet that large velocity ratio electric current and secondary output current differ.The utility model includes first winding, the both ends of first winding connect once wire wrap terminal, also include the secondary iron-core coil of small no-load voltage ratio and the secondary iron-core coil of large velocity ratio, first winding passes through the secondary iron-core coil of small no-load voltage ratio and the secondary iron-core coil of large velocity ratio, and the number of turn for being placed on the first winding of the secondary iron-core coil of small no-load voltage ratio is at least two circles, the number of turn for being placed on the first winding of the secondary iron-core coil of large velocity ratio is a circle.The utility model disclosure satisfy that primary current difference more than 30, and secondary current differs the requirement at 5 times, realizes that a current transformer can have the requirement of a variety of no-load voltage ratios.

Description

A kind of current transformer of polytropic ratio
Technical field
The utility model belongs to current transformer technical field, and in particular to a kind of current transformer of polytropic ratio.
Background technology
Primary side high current is converted into secondary side low current to measure by current transformer according to electromagnetic induction principle Instrument.Current transformer is made up of the iron core and winding closed.Its first side winding number of turn is seldom, and going here and there is needing what is measured In the circuit of electric current, the effect for current transformation and electrical isolation.
Primary current in the same current transformer produced in the prior art is a kind of electric current ratio, although same production There are multiple electric current ratios on product, but the difference of no-load voltage ratio, within 2 times, the structure of its product is that a wire is placed on secondary iron core line On circle, progress multiturn is rich to be formed on secondary iron-core coil, and structure is as shown in Figure 1.The problem of this product is present is to meet The demand of particular/special requirement no-load voltage ratio, such as:Primary current is again more inconsistent than the secondary output current for differing by more than 3 times and product.
Utility model content
The utility model can not meet large velocity ratio electric current and secondary output current not to solve existing current transformer The problem of identical, and a kind of current transformer of polytropic ratio is provided.
To solve technical problem, technical scheme is used by the utility model:
A kind of current transformer of polytropic ratio, including first winding, the both ends of first winding connect once wire wrap terminal, Characterized in that, also including the secondary iron-core coil of small no-load voltage ratio and the secondary iron-core coil of large velocity ratio, first winding passes through small no-load voltage ratio two The secondary secondary iron-core coil of iron-core coil and large velocity ratio, and it is placed on the number of turn of the first winding of the secondary iron-core coil of small no-load voltage ratio at least For two circles (multiturn), the number of turn for being placed on the first winding of the secondary iron-core coil of large velocity ratio is a circle.
The secondary iron-core coil of large velocity ratio and the secondary iron-core coil of small no-load voltage ratio are connected with secondary iron-core coil leading-out terminal.
The secondary iron-core coil of large velocity ratio and the secondary iron-core coil of small no-load voltage ratio include iron core and are wound on iron core Secondary wiring, secondary wiring are connected with secondary iron-core coil leading-out terminal.
Compared with prior art, the utility model has the advantages that:
The current transformer of polytropic ratio of the present utility model by the first winding of the secondary iron-core coil of small no-load voltage ratio be coiled into It is two circles (multiturn) less, the number of turn of the first winding of the secondary iron-core coil of large velocity ratio is had mercy on single turn is made, on the one hand can expired For sufficient primary current difference more than 30, secondary current differs the requirement at 5 times, and it is more to realize that a current transformer can have The requirement of kind no-load voltage ratio.The multiturn and single turn structure design of first winding simultaneously, it can also play the work of mutually insulated isolation With.
Brief description of the drawings
Fig. 1 is the structural representation of existing current transformer;
Fig. 2 is structural representation of the present utility model;
Fig. 3 is the structural representation of the secondary iron-core coil of large velocity ratio of the present utility model and the secondary iron-core coil of small no-load voltage ratio;
Marked in figure:1st, a wire wrap terminal, 2, first winding, 3, the secondary iron-core coil of large velocity ratio, 4, small no-load voltage ratio it is secondary Iron-core coil, 5, secondary iron-core coil leading-out terminal, 6, iron core, 7, wire, 8, secondary iron-core coil.
Embodiment
With reference to embodiment, the utility model will be further described, and described embodiment is only that this practicality is new Type part of the embodiment, it is not whole embodiments.Based on the embodiment in the utility model, the ordinary skill people of this area Other embodiments used that member is obtained under the premise of creative work is not made, belong to protection model of the present utility model Enclose.
With reference to accompanying drawing, as shown in figure 1, existing current transformer includes first winding 2 and secondary iron-core coil 8, wherein First winding is through secondary iron-core coil 8 and is wound with least two circles (multiturn), the both ends connection once coiling of first winding Terminal 1, the both ends of secondary iron-core coil 8 are connected with secondary iron-core coil leading-out terminal 5.The problem of this current transformer is present It is can not meet the needs of particular/special requirement no-load voltage ratio, such as:Primary current than differ by more than 3 times and product secondary output current again not Unanimously, at all can not in the case of large velocity ratio (such as primary current difference more than 30) and secondary output current differ again Use.
The current transformer of polytropic ratio provided by the utility model, including first winding 2, the both ends connection of first winding 2 Once wire wrap terminal 1, in addition to the secondary iron-core coil 4 of small no-load voltage ratio and the secondary iron-core coil 3 of large velocity ratio, first winding 2 pass through The secondary iron-core coil 4 of small no-load voltage ratio and the secondary iron-core coil 3 of large velocity ratio, and be placed on the secondary iron-core coil 4 of small no-load voltage ratio once around The number of turn of group is at least two circles (multiturn), and the number of turn for being placed on the first winding of the secondary iron-core coil 3 of large velocity ratio is a circle.
Wherein, the secondary iron-core coil 3 of large velocity ratio and the secondary iron-core coil 4 of small no-load voltage ratio are connected with secondary iron-core coil exit Son 5.
The secondary iron-core coil 3 of large velocity ratio and the secondary iron-core coil 4 of small no-load voltage ratio include iron core 6 and are wound on iron core 6 On secondary wiring 7, secondary wiring 7 is connected with secondary iron-core coil leading-out terminal 5.
The current transformer of polytropic ratio of the present utility model by the first winding of the secondary iron-core coil of small no-load voltage ratio be coiled into It is two circles (multiturn) less, the number of turn of the first winding of the secondary iron-core coil of large velocity ratio is had mercy on single turn is made, on the one hand can expired For sufficient primary current difference more than 30, secondary current differs the requirement at 5 times.The multiturn and single turn of first winding simultaneously Structure design, it can also play a part of mutually insulated isolation.So can be achieved with a current transformer has a variety of no-load voltage ratios Demand.
Such as:If electric current is than a kind of current transformer for 50/5/5/3000/1A, for two secondary iron cores of 50/5/5A Coil will ensure its related technical parameter, and first winding 2 is at least wanted more than the circle of coiling two, for 3000/1A such as first windings Around two circles, 3000/1A secondary coil is by the circle of coiling 6000, on the premise of the contour structures of product are certain, 3000/1A line Circle can not load, therefore, by the coil of 3000/1A (large velocity ratio) first winding 2 around a circle, the secondary iron-core coil of large velocity ratio 3 number of turn is 3000 circles, and so its 3000/1A product could design production.

Claims (3)

1. a kind of current transformer of polytropic ratio, including first winding (2), the both ends connection once coiling of first winding (2) Terminal (1), it is characterised in that also including the secondary iron-core coil of small no-load voltage ratio (4) and the secondary iron-core coil of large velocity ratio (3), once around Group (2) passes through the secondary iron-core coil of small no-load voltage ratio (4) and the secondary iron-core coil of large velocity ratio (3), and is placed on the secondary iron core of small no-load voltage ratio The number of turn of the first winding (2) of coil (4) is at least two circles, is placed on the first winding (2) of the secondary iron-core coil of large velocity ratio (3) The number of turn is a circle.
2. the current transformer of polytropic ratio according to claim 1, it is characterised in that the secondary iron-core coil of large velocity ratio (3) and the secondary iron-core coil of small no-load voltage ratio (4) is connected with secondary iron-core coil leading-out terminal (5).
3. the current transformer of polytropic ratio according to claim 1 or 2, it is characterised in that the secondary iron core of large velocity ratio Coil (3) and the secondary iron-core coil of small no-load voltage ratio (4) include iron core (6) and the secondary wiring (7) being wound on iron core (6), and two Secondary wire (7) is connected with secondary iron-core coil leading-out terminal (5).
CN201721129074.0U 2017-09-05 2017-09-05 A kind of current transformer of polytropic ratio Expired - Fee Related CN207116212U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721129074.0U CN207116212U (en) 2017-09-05 2017-09-05 A kind of current transformer of polytropic ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721129074.0U CN207116212U (en) 2017-09-05 2017-09-05 A kind of current transformer of polytropic ratio

Publications (1)

Publication Number Publication Date
CN207116212U true CN207116212U (en) 2018-03-16

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109119238A (en) * 2018-07-03 2019-01-01 大连第二互感器集团有限公司 A kind of current transformer and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109119238A (en) * 2018-07-03 2019-01-01 大连第二互感器集团有限公司 A kind of current transformer and preparation method thereof

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20180316

Termination date: 20190905