CN103811165B - Outer-winding type current transformer - Google Patents
Outer-winding type current transformer Download PDFInfo
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- CN103811165B CN103811165B CN201210440458.XA CN201210440458A CN103811165B CN 103811165 B CN103811165 B CN 103811165B CN 201210440458 A CN201210440458 A CN 201210440458A CN 103811165 B CN103811165 B CN 103811165B
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Abstract
The invention relates to an outer-winding type current transformer used in the electric power industry. The outer-winding type current transformer is composed of a primary conducting bar, a primary winding, a shell, a conducting tube, a secondary winding, a secondary conducting bar, an overvoltage protector, an insulation terminal, an inner insulation plate, an outer insulation plate, a protective cover, a conducting base and the like. A sleeve is arranged on a base, the secondary winding is arranged in an inner cavity of the shell, the primary conducting bar is connected with the primary winding through a lead, the protective cover is arranged on the outer side of the shell, the primary winding penetrates through the conducting tube to be arranged in the protective cover, and various grades of coil taps of the primary winding are respectively connected with the secondary conducting bar. Due to the fact that multiple turns of primary winding coils are arranged in the conducting tube in the secondary winding in a penetrated mode, the current with the low current ratio is increased, and the current output range is expanded; due to the arrangement of the overvoltage protector, devices of the current transformer can be protected; due to the fact that the primary winding penetrates through the conducting tube to be evenly distributed in the protective cover outside the shell, the winding accuracy is high.
Description
Technical field
The present invention relates to a kind of transformer of power industry, specifically a kind of externally-wound type current transformer.
Background technology
Through retrieving relevant patent documentation, not yet retrieve at present and a kind of present configuration identical externally-wound type Current Mutual Inductance
Device.Existing current transformer, due to due to its structure, is typically only applicable to the occasion of high current ratio, constantly sends out with scientific and technological
Exhibition and being continuously increased of digital circuit testing equipment, high current is used for during testing equipment than current transformer in addition it is also necessary to
Electric current is carried out with transformation process just can be used in testing circuit, bring very big inconvenience to using.China's patent application application
Number it is：201010573001.7, entitled：" a kind of multi-turn inverted current transformer " discloses a kind of inverted electric current of multiturn
The current transformer of transformer, particularly small current ratio is although the current transformer that this application overcomes existing small current ratio becomes
This height, volume be big and high current than current transformer shortcoming, but in the severe sky such as high voltage, thunderbolt due to due to its structure
Easily cause the damage of current transformer in the case of gas, so the limitation that such transformer uses is larger, still can not meet existing
There are the needs of produce reality, the requirement big in order to meet low cost, curent change, it is therefore necessary to existing transformer in addition
Improve, to meet the needs of reality.
Content of the invention
The invention aims to provide a kind of improvement on the basis of existing current transformer, by existing secondary around
The form passing around first winding in group realizes multiple electric current ratios, is easy to a kind of externally-wound type Current Mutual Inductance of detection and voltage protection
Device.
The present invention is technically characterized in that：It is designed to by primary conductive on the basis of considering compact conformation, dependable performance
Row, first winding, housing, contact tube, Secondary Winding, secondary busbar, overvoltage protection device, insulated terminal, interior insulation plate, outer
Insulation board, sleeve pipe, base, secondary wiring terminals, protective cover, a kind of externally-wound type current transformer of conductive seat composition, sleeve pipe sets
Put on base, be provided with secondary wiring terminals in the bottom of base, housing is provided with sleeve pipe, the inner chamber of housing is provided with two
Secondary winding, contact tube passes through Secondary Winding, and primary conductive row be connected with first winding by lead；It is provided with anti-in the outside of housing
Guard shield, first winding is arranged in protective cover through contact tube；Secondary busbar, each grade of first winding are provided with housing
Coil tap is connected with secondary busbar respectively；Contact tube is passed through conductive seat and is connected with primary conductive row；Conductive seat sets
There is insulated terminal, primary conductive row is provided with insulated terminal, primary conductive is arranged exhausted with the lead of first winding by insulated terminal
Edge separates；Overvoltage protection device is arranged on conductive seat and is connected with first winding by lead；Between housing and conductive seat
It is provided with interior insulation plate；It is provided with external insulation plate between conductive seat and protective cover.
Described first winding is the induction coil that at least one circle passes through contact tube.
Described first winding is evenly distributed in the protective cover outside housing through contact tube.
Described secondary busbar is a multiple-contact device, can be according to the electric pressure different circles from first winding respectively
Number coil contact is connected.
During use, primary conductive row is connected with a circuit, conduction is had respectively entered by the electric current that primary conductive is arranged
Pipe, in first winding, make to form faradic current in Secondary Winding through electromagnetic induction, and through secondary wiring terminals by current information
Pass to instrumentation, metering, control device；The faradic current that electric current in first winding is formed around Secondary Winding is again
Pass in Digital Detecting device and be used for detecting；Secondary busbar can be taken out respectively according to the grade difference of required electric current, voltage
Head is exported.Primary side is provided with overvoltage protection, its objective is to prevent from destroying under the high pressure inclement weather conditions such as thunderbolt
Primary winding coils and arrange.
It is an advantage of the invention that：There are multiturn primary winding coils due to passing through in the contact tube at Secondary Winding center,
Thus increased the electric current of small current ratio, expanding the scope of electric current output, changing conventional current transformer current than big
Situation；Due to being provided with overvoltage protection, thus the device of current transformer can be played in the state of voltage is unbalanced
Protection, particularly first winding is effectively protected；It is evenly distributed on the protection outside housing due to first winding through contact tube
In cover, so that sensing magnetic flux distribution uniformly, reduces leakage magnetic flux impact, makes winding precision higher between winding；Inside and outside due to being provided with
Insulation board, so as to effectively separate housing, protective cover and conductive seat；Due to rational in infrastructure, superior performance, so having very
Big practical and popularizing value.
Brief description
Below with reference to accompanying drawing, the present invention is further described through：
Accompanying drawing 1 is a kind of structural representation of present invention externally-wound type current transformer；
Accompanying drawing 2 is the partial structural diagram of accompanying drawing 1；
Accompanying drawing 3 is the structural representation of the A--A section along accompanying drawing 1.
Specific embodiment
Referring to the drawings 1, accompanying drawing 2, accompanying drawing 3, a kind of externally-wound type current transformer of the present invention it arrange 1, one by primary conductive
Secondary winding 2, housing 3, contact tube 4, Secondary Winding 5, secondary busbar 6, overvoltage protection device 7, insulated terminal 8, interior insulation plate
9th, external insulation plate 10, sleeve pipe 11, base 12, secondary wiring terminals 13, protective cover 14, conductive seat 15 form, and sleeve pipe 11 is arranged on
On base 12, it is provided with secondary wiring terminals 13 in the bottom of base 12, housing 3 is provided with sleeve pipe 11, in the inner chamber of housing 3
It is provided with Secondary Winding 5, contact tube 4 passes through Secondary Winding 5, primary conductive row 1 is connected with first winding 2 by lead；In housing 3
Outside be provided with protective cover 14, first winding 2 is arranged in protective cover 14 through contact tube 4, and described first winding 2 is at least
One circle passes through the induction coil of contact tube 4, and first winding 2 is evenly distributed in the protective cover 14 outside housing 3 through contact tube 4；
Secondary busbar 6 is provided with housing 3, each grade coil tap of first winding 2 is connected with secondary busbar 6 respectively, institute
The secondary busbar 6 stated is a multiple-contact device, can number of turn coils different from first winding 2 connect respectively according to electric pressure
Point is connected；Contact tube 4 is passed through conductive seat 15 and is connected with primary conductive row 1；Insulated terminal 8 is provided with conductive seat 15, exhausted
Acies 8 is provided with primary conductive row 1, and the lead wire insulation of primary conductive row 1 and first winding 2 is separated by insulated terminal 8；Cross electricity
Pressure protector 7 is arranged on conductive seat 15 and is connected with first winding 2 by lead；It is provided between housing 3 and conductive seat 15
Interior insulation plate 9；It is provided with external insulation plate 10 between conductive seat 15 and protective cover 14.
Claims (4)
1. a kind of externally-wound type current transformer it arranged by primary conductive（1）, first winding（2）, housing（3）, contact tube（4）, two
Secondary winding（5）, secondary busbar（6）, overvoltage protection device（7）, insulated terminal（8）, interior insulation plate（9）, external insulation plate（10）、
Sleeve pipe（11）, base（12）, secondary wiring terminals（13）, protective cover（14）, conductive seat（15）Composition, sleeve pipe（11）It is arranged on bottom
Seat（12）On, in base（12）Bottom be provided with secondary wiring terminals（13）, in sleeve pipe（11）It is provided with housing（3）, in housing
（3）Inner chamber in be provided with Secondary Winding（5）, contact tube（4）Through Secondary Winding（5）It is characterised in that：Primary conductive is arranged（1）
By lead and first winding（2）It is connected；In housing（3）Outside be provided with protective cover（14）, first winding（2）Through contact tube
（4）It is arranged on protective cover（14）Interior；In housing（3）It is provided with secondary busbar（6）, first winding（2）Each grade coil take out
Head respectively with secondary busbar（6）It is connected；Contact tube（4）By conductive seat（15）With primary conductive row（1）It is connected；In conduction
Seat（15）It is provided with insulated terminal（8）, in insulated terminal（8）It is provided with primary conductive row（1）, insulated terminal（8）To once lead
Electricity row（1）With first winding（2）Lead wire insulation separate；Overvoltage protection device（7）It is arranged on conductive seat（15）Go up and pass through to draw
Line and first winding（2）It is connected；In housing（3）With conductive seat（15）Between be provided with interior insulation plate（9）；In conductive seat（15）With anti-
Guard shield（14）Between be provided with external insulation plate（10）.
2. a kind of externally-wound type current transformer according to claim 1 it is characterised in that：Described first winding（2）For
At least one circle passes through contact tube（4）Induction coil.
3. a kind of externally-wound type current transformer according to claim 1 and 2 it is characterised in that：Described first winding（2）
Through contact tube（4）It is evenly distributed on housing（3）Outer protective cover（14）Interior.
4. a kind of externally-wound type current transformer according to claim 1 it is characterised in that：Described secondary busbar（6）
For a multiple-contact device, can according to electric pressure respectively with first winding（2）Different number of turn coil contacts be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440458.XA CN103811165B (en) | 2012-11-07 | 2012-11-07 | Outer-winding type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440458.XA CN103811165B (en) | 2012-11-07 | 2012-11-07 | Outer-winding type current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103811165A CN103811165A (en) | 2014-05-21 |
| CN103811165B true CN103811165B (en) | 2017-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210440458.XA Active CN103811165B (en) | 2012-11-07 | 2012-11-07 | Outer-winding type current transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN103811165B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736868A (en) * | 2019-10-24 | 2020-01-31 | 中互电气(江苏)有限公司 | external winding current transformer |
| CN114609573A (en) * | 2022-03-25 | 2022-06-10 | 山东泰开检测有限公司 | Inflatable armoured combined mutual inductor calibrating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN202150345U (en) * | 2011-06-25 | 2012-02-22 | 江苏思源赫兹互感器有限公司 | High-voltage high-precision current transformer |
| CN202258765U (en) * | 2011-10-25 | 2012-05-30 | 保定天威集团有限公司 | Variable specific current transformer |
| CN202332564U (en) * | 2011-12-07 | 2012-07-11 | 特变电工康嘉(沈阳)互感器有限责任公司 | Independent, oil-immersed and inverted current transformer |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH675924A5 (en) * | 1985-05-20 | 1990-11-15 | Bbc Brown Boveri & Cie | High voltage post current transformer |
| CN2814638Y (en) * | 2005-01-19 | 2006-09-06 | 江苏思源赫兹互感器有限公司 | Oil immersed inverted current mutual inductor |
| CN201282024Y (en) * | 2008-08-12 | 2009-07-29 | 中国西电电气股份有限公司 | Oil immersion inversion type current transformer |
| WO2010061399A1 (en) * | 2008-11-27 | 2010-06-03 | Areva T&D India Ltd. | A current transformer |
| CN201392730Y (en) * | 2009-04-24 | 2010-01-27 | 西安爱博电气有限公司 | High-voltage SF6 current transformer |
| CN102064014B (en) * | 2010-12-06 | 2012-07-25 | 保定天威集团有限公司 | Multi-turn inverted current transformer |
| CN202930200U (en) * | 2012-11-07 | 2013-05-08 | 江苏思源赫兹互感器有限公司 | Outer winding type current transformer |
-
2012
- 2012-11-07 CN CN201210440458.XA patent/CN103811165B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201498350U (en) * | 2009-07-31 | 2010-06-02 | 奥菲科泰电气(北京)有限公司 | Outdoor open current mutual inductor |
| CN202150345U (en) * | 2011-06-25 | 2012-02-22 | 江苏思源赫兹互感器有限公司 | High-voltage high-precision current transformer |
| CN202258765U (en) * | 2011-10-25 | 2012-05-30 | 保定天威集团有限公司 | Variable specific current transformer |
| CN202332564U (en) * | 2011-12-07 | 2012-07-11 | 特变电工康嘉(沈阳)互感器有限责任公司 | Independent, oil-immersed and inverted current transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103811165A (en) | 2014-05-21 |
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