CN108666118A - A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof - Google Patents
A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof Download PDFInfo
- Publication number
- CN108666118A CN108666118A CN201810247753.0A CN201810247753A CN108666118A CN 108666118 A CN108666118 A CN 108666118A CN 201810247753 A CN201810247753 A CN 201810247753A CN 108666118 A CN108666118 A CN 108666118A
- Authority
- CN
- China
- Prior art keywords
- current transformer
- coil
- classification
- main coil
- current
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
A kind of Multiple coil current transformer of same magnetic circuit of the present invention and preparation method thereof, the current transformer includes main coil and several classification coils, wherein, the first side winding of the main coil is connect by main coil primary side input terminal with circuit-under-test, on the leading-out terminal for the secondary side winding that several described first side windings for being classified coils are connected to main coil in cascaded fashion.Multiple classification coils of the Multiple coil current transformer of same magnetic circuit of the present invention are connected in the secondary side winding of main coil in cascaded fashion; this cascade mode of coil can both meet the multi-coil requirement of relay protection, electrical energy measurement, electric quantity monitoring backup proposition; again so that the quantity of current transformer high-pressure side Conventional coil declines; greatly reduce the major insulation wrapping difficulty of current transformer Multiple coil at this stage; and; this main iron core structure requires lower in the transport of current transformer, installation process, improves current transformer reliability of operation.
Description
Technical field
The present invention relates to transformer technical fields, and more particularly, to a kind of Multiple coil Current Mutual Inductance of same magnetic circuit
Device and preparation method thereof.
Background technology
The current transformer electric system primary equipment most as usage amount, is widely used in energy metering, uses telecommunications
Cease the fields such as acquisition, relay protection.To improve to the reliability of relay protection of power system, electrical energy measurement, electric quantity monitoring,
The current mutual inductor coil quantity of 110kV and above increases to 8 or more from past 4 requirements so that electricity
Current transformer coil overall weight doubles, and the major insulation wrapping difficulty of especially inverted structure current transformer increases, main exhausted
Edge electric fields uniform degree randomness is big, and control of product quality is difficult to ensure very much.
In addition, due to number of coils more cause coil mutually to squeeze, untanking mass it is big, insulated support (casing) flange
The pressure and torque that porcelain piece undertakes in transport, installation, operational process increase.Increasing for number of coils is many current transformers
One of an important factor for transport and installation process are damaged, explosion or failure occur for operational process.
Invention content
It is big in order to solve the how caused weight of current mutual inductor coil quantity existing for background technology, transport and installation difficulty
Greatly, flimsy technical problem, the present invention provide a kind of Multiple coil current transformer of same magnetic circuit, and the current transformer includes
Main coil and several classification coils, wherein the first side winding of the main coil by main coil primary side input terminal with
Circuit-under-test connects, first side windings of several classification coils be connected in cascaded fashion the secondary side of main coil around
On the leading-out terminal of group.
Further, the current transformer is electromagnetic current transducer.
Further, the classification coil converts the electric current that main coil secondary side exports to the volume of the current transformer
Determine output current.
Further, the classification coil of the secondary side output end connection of each main coil is no less than 2.
Further, the core material of the current transformer main coil and classification coil is ultracrystallite or silicon steel material
Material.
Further, the current transformer is used for measurement and protection.
According to another aspect of the present invention, the present invention provides a kind of preparation side of the Multiple coil current transformer of same magnetic circuit
Method, the method includes：
Step S1：Using the first side winding of current transformer main coil as the input terminal of a rated current；
Step S2：The first side winding of several classification coils is defeated with main coil secondary side winding in cascaded fashion
Go out terminal connection；
Step S3：Using the secondary side winding of each classification coil as the output end of Current Transformer Secondary rated current
Son.
Further, it is additionally provided with step S0 before the step S1：It is designed and is led according to the accuracy requirement of current transformer
The core material and structure of coil and classification coil.
Further, in the step S0, when the main coil of the current transformer be by a rated current according to than
When example is converted into small electric current, the main coil is by the way of punching.
Further, the classification coil secondary side can export small voltage after resistors in series.
The coil of current transformer is divided into main coil and divided by the Multiple coil current transformer of same magnetic circuit of the present invention
Grade coil two parts, multiple classification coils are connected in the secondary side winding of main coil in cascaded fashion, this coil cascade
Mode can not only meet relay protection, electrical energy measurement, electric quantity monitoring backup propose multi-coil requirement, but also make Current Mutual Inductance
The quantity of device high-pressure side Conventional coil declines, and current transformer main iron core coil weight will reduce 60% or more in the prior art,
The major insulation wrapping difficulty for thus greatly reducing current transformer Multiple coil at this stage, moreover, this main iron core structure is in electricity
It requires lower in the transport of current transformer, installation process, improves current transformer reliability of operation.
Description of the drawings
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by：
Fig. 1 is the structure chart of the same magnetic circuit Multiple coil current transformer of the specific embodiment of the invention；
Fig. 2 is the flow chart of the preparation method of the same magnetic circuit Multiple coil current transformer of the specific embodiment of the invention.
Specific implementation mode
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be to disclose at large and fully
The present invention, and fully convey the scope of the present invention to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon is remembered.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related field has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the structure chart of the same magnetic circuit Multiple coil current transformer of the specific embodiment of the invention.As shown in Figure 1, this
The invention same magnetic circuit Multiple coil current transformer 100 includes main coil 101 and 2 classification coils 102 and 103, wherein institute
The first side winding for stating main coil 100 is connect by main coil primary side input terminal S1 and S2 with circuit-under-test, the classification
The first side winding of coil 102 and 103 is connected in cascaded fashion on the leading-out terminal of the secondary side winding of main coil.
Preferably, the current transformer is electromagnetic current transducer.
Preferably, the classification coil converts the electric current that main coil secondary side exports to the specified of the current transformer
Output current.
Preferably, the classification coil of the secondary side output end connection of each main coil is no less than 2.
Preferably, the core material of the current transformer main coil and classification coil is ultracrystallite or silicon steel material.
Preferably, the current transformer is used for measurement and protection.
In the present embodiment, the current transformer is as follows as the example of metering, measurement winding：
Rated current 3000A, 0.2S grades of class of accuracy, secondary circuit length are less than 1000 meters, rated load
1VA.Main coil core material is ultracrystallite, core dimensions Φ 400/ Φ 280/120mm, weight 39.03kg, shield box size Φ
410/ Φ 270/130, conducting wire use QZ-2 type enameled wires, line footpath Φ 1.88, three and around, no-load voltage ratio 3000A/50A, wire winding layer
1 layer of number, totally 60 circle, exterior insulation use four layers of the uniform half lap of 0.05 25 polyester films.Classification iron-core coil material is ultra micro
Crystalline substance, core dimensions Φ 180/ Φ 120/60mm, weight 4.30kg, 190/ Φ 110/70mm of shield box size Φ, conducting wire use QZ-2
Type enameled wire, line footpath Φ 0.65, classification coil no-load voltage ratio are 50A/0.1A, and 2 layers of the coiling number of plies, totally 500 circle, layer insulation use
0.05 × 10 polyester film, two layers of uniform half lap.According to current transformer practical application request, classification winding can be multiple.
In the present embodiment, the current transformer is as follows as the example of protective winding：
Rated current 3000A, stable state protected level 5P20, rated load 1VA.Secondary circuit length is less than 1000 meters,
Rated load 1VA.Main coil core material is silicon steel sheet, no-load voltage ratio 3000A/50A；Classification iron-core coil material is silicon steel sheet,
Classification coil no-load voltage ratio is 50A/0.1A.
TYP grades of coils, KSSC=20, main coil current ratio 3000A/50A are classified coil current ratio 50A/0.1A, once
Time constant 100ms, Two-way Cycle C-O-C-O：100ms-500ms-100ms, output voltage 200mV.1180/ Φ of core dimensions Φ
TPY main iron cores the weight 63.4kg, total weight 88kg of 1000/77mm；The TPY main iron cores of 690/ Φ 500/95mm of core dimensions Φ
Weight 38.44kg, total weight 64kg.
Fig. 2 is the flow chart of the preparation method of the same magnetic circuit Multiple coil current transformer of the specific embodiment of the invention.Such as
Shown in Fig. 2, the preparation method 200 of the Multiple coil current transformer of same magnetic circuit of the present invention is since step S200.
Step 200 according to the accuracy requirement Design theme circle of current transformer and is classified the core material and knot of coil
Structure；
Step S201, using the first side winding of current transformer main coil as the input terminal of a rated current；
Step S202, by several classification coils first side winding in cascaded fashion with main coil secondary side winding
Leading-out terminal connects；
Step S203, using the secondary side winding of each classification coil as the output end of Current Transformer Secondary rated current
Son.
Preferably, in the step S200, when the main coil of the current transformer be by a rated current according to than
When example is converted into small electric current, the main coil is by the way of punching.
Preferably, the classification coil secondary side can export small voltage after resistors in series.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do【Device, component etc.】" all it is opened ground
It is construed at least one of described device, component etc. example, unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (10)
1. a kind of Multiple coil current transformer of same magnetic circuit, which is characterized in that the current transformer includes main coil and several
A classification coil, wherein the first side winding of the main coil is connect by main coil primary side input terminal with circuit-under-test,
The first side winding of several classification coils is connected to the leading-out terminal of the secondary side winding of main coil in cascaded fashion
On.
2. current transformer according to claim 1, which is characterized in that the current transformer is electromagnetic type Current Mutual Inductance
Device.
3. current transformer according to claim 1, which is characterized in that the classification coil exports main coil secondary side
Electric current be converted into the output-current rating of the current transformer.
4. current transformer according to claim 1, which is characterized in that the secondary side output end connection of each main coil
The number of classification coil is no less than 2.
5. current transformer according to claim 1, which is characterized in that the current transformer main coil and classification coil
Core material be ultracrystallite or silicon steel material.
6. current transformer according to claim 1, which is characterized in that the current transformer is used for measurement and guarantor
Shield.
7. a kind of preparation method of the Multiple coil current transformer of same magnetic circuit, which is characterized in that the method includes：
Step S1：Using the first side winding of current transformer main coil as the input terminal of a rated current；
Step S2：By the first side winding output end with main coil secondary side winding in cascaded fashion of several classification coils
Son connection；
Step S3：Using the secondary side winding of each classification coil as the leading-out terminal of Current Transformer Secondary rated current.
8. preparation method according to claim 7, which is characterized in that be additionally provided with step S0 before the step S1：According to
The core material and structure of the accuracy requirement Design theme circle and classification coil of current transformer.
9. preparation method according to claim 8, which is characterized in that in the step S0, when the current transformer
Main coil is when proportionally converting a rated current to small electric current, and the main coil is by the way of punching.
10. preparation method according to claim 7, which is characterized in that the classification coil secondary side can resistors in series
After export small voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247753.0A CN108666118A (en) | 2018-03-23 | 2018-03-23 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247753.0A CN108666118A (en) | 2018-03-23 | 2018-03-23 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108666118A true CN108666118A (en) | 2018-10-16 |
Family
ID=63782370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810247753.0A Pending CN108666118A (en) | 2018-03-23 | 2018-03-23 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108666118A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111523256A (en) * | 2020-07-06 | 2020-08-11 | 南京航空航天大学 | Mutual inductance calculation method of coaxial multi-coil related to non-ferromagnetic metal medium |
| CN112103062A (en) * | 2020-07-31 | 2020-12-18 | 中国电力科学研究院有限公司 | Same magnetic circuit multi-winding current transformer device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
| CN105405626A (en) * | 2015-12-29 | 2016-03-16 | 无锡应达工业有限公司 | Current transformer of high-power and medium-high frequency power supply and winding method |
-
2018
- 2018-03-23 CN CN201810247753.0A patent/CN108666118A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
| CN105405626A (en) * | 2015-12-29 | 2016-03-16 | 无锡应达工业有限公司 | Current transformer of high-power and medium-high frequency power supply and winding method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111523256A (en) * | 2020-07-06 | 2020-08-11 | 南京航空航天大学 | Mutual inductance calculation method of coaxial multi-coil related to non-ferromagnetic metal medium |
| CN112103062A (en) * | 2020-07-31 | 2020-12-18 | 中国电力科学研究院有限公司 | Same magnetic circuit multi-winding current transformer device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102360857B (en) | Integrated network distributing transformer with error compensating mutual inductor | |
| CN102044863A (en) | Electrical switching apparatus including a plurality of rogowski coils and method of calibrating the same | |
| CN204269765U (en) | A kind of transformer for power frequency withstand test and test unit | |
| CN101833043A (en) | Method for measuring electric capacity and dielectric loss of capacitance type voltage transformer | |
| CN204422710U (en) | A kind of oil-immersed type testing transformer | |
| CN108666118A (en) | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof | |
| CN212209198U (en) | Passive zero-flux wide-range current transformer for metering | |
| CN208400695U (en) | A kind of Multiple coil current transformer of same magnetic circuit | |
| CN111540574B (en) | Wide-range current transformer and manufacturing method thereof | |
| CN107170571A (en) | A kind of multilevel voltage transformer | |
| CN106653336B (en) | A method of preparing the current transformer with simplification error test function | |
| CN106653339A (en) | Current transformer | |
| Hu et al. | Characteristics comparison between HTS air core and partial core transformers | |
| CN203312022U (en) | Low-voltage direct-current-resisting current mutual inductor | |
| CN105957696A (en) | Anti-DC measuring current transformer and preparation method | |
| CN201036148Y (en) | Helix tube type aircore coil current sensor | |
| CN213070851U (en) | Multifunctional current transformer | |
| CN114883081A (en) | Wide-range current transformer and error compensation method thereof | |
| CN103454553A (en) | Secondary side phase checking device of voltage transformer | |
| CN201229849Y (en) | External integration type Rogowski coil current mutual inductor | |
| CN205666125U (en) | Anti direct current measuring current transformer | |
| CN104849532A (en) | Precise current sensor | |
| Sekaran | Magnetic circuits and power transformers | |
| CN202142406U (en) | Integrated network distribution transformer having error compensation mutual inductor | |
| CN2170567Y (en) | Power current transformer with special coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181016 |