CN103811165A - Outer-winding type current transformer - Google Patents
Outer-winding type current transformer Download PDFInfo
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- CN103811165A CN103811165A CN201210440458.XA CN201210440458A CN103811165A CN 103811165 A CN103811165 A CN 103811165A CN 201210440458 A CN201210440458 A CN 201210440458A CN 103811165 A CN103811165 A CN 103811165A
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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 instrument transformer that power industry is used, specifically a kind of externally-wound type current transformer.
Background technology
Through retrieving relevant patent documentation, not yet retrieve a kind of externally-wound type current transformer identical with structure of the present invention at present.Existing current transformer is due to the reason of its structure, generally be only applicable to the occasion of large current ratio, along with the continuous increase of scientific and technological development and digital circuit checkout equipment, for large current ratio current transformer during for detection of equipment, also need that electric current is carried out to transformation processing and just can be used in testing circuit, bring very large inconvenience to use.China's patent application application number is: 201010573001.7, name is called: " a kind of multi-turn inverted current transformer " discloses a kind of multi-turn inverted current transformer, the current transformer of particularly little current ratio, although it is high that this application has overcome the current transformer cost of existing little current ratio, the shortcoming of the large and large current ratio current transformer of volume, but because the reason of its structure is at high voltage, under the inclement weather conditions such as thunderbolt, easily cause the damage of current transformer, so the limitation that this type of instrument transformer uses is larger, still can not meet the actual needs of existing production, low in order to meet cost, the requirement that curent change is large, so be necessary existing instrument transformer to be improved, to meet actual needs.
Summary of the invention
The object of the invention is to provide a kind of improvement on existing current transformer basis, by wearing around the form of a winding and realize multiple current ratio, be convenient to a kind of externally-wound type current transformer of detection and voltage protection in existing secondary winding.
Technical characterictic of the present invention is: considering compact conformation, on the basis of dependable performance, be designed to be arranged by primary conductive, a winding, housing, contact tube, secondary winding, secondary busbar, overvoltage protection device, insulated terminal, interior insulation board, external insulation plate, sleeve pipe, base, secondary wiring terminals, protective cover, a kind of externally-wound type current transformer of conductive seat composition, sleeve pipe is arranged on base, bottom at base is provided with secondary wiring terminals, on sleeve pipe, be provided with housing, in the inner chamber of housing, be provided with secondary winding, contact tube is through secondary winding, primary conductive row be connected with a winding by lead-in wire, outside at housing is provided with protective cover, and one time winding is arranged in protective cover through contact tube, on housing, be provided with secondary busbar, each grade coil tap of a winding is connected with secondary busbar respectively, contact tube is connected with primary conductive row by conductive seat, on conductive seat, be provided with insulated terminal, be provided with primary conductive row on insulated terminal, insulated terminal separates primary conductive row with the lead wire insulation of a winding, overvoltage protection device is arranged on conductive seat and by lead-in wire and is connected with a winding, between housing and conductive seat, be provided with interior insulation board, between conductive seat and protective cover, be provided with external insulation plate.
A described winding is the induction coil of at least one circle through contact tube.
A described winding is evenly distributed in the protective cover outside housing through contact tube.
Described secondary busbar is a multiple-contact device, can be connected from the different number of turn coil contacts of a winding respectively according to electric pressure.
When use, primary conductive row is connected with a circuit, the electric current of arranging by primary conductive enters into respectively contact tube, a winding, makes to form in secondary winding induced current through electromagnetic induction, and through secondary wiring terminals, current information is passed to detecting instrument, metering, control device; The induced current forming around secondary winding through the electric current in a winding pass to again in Digital Detecting device for detection of; Secondary busbar can according to the grade difference of required electric current, voltage respectively tap export.Primary side is provided with overvoltage protection, its objective is and prevents from destroying primary winding coils setting under the high pressure such as thunderbolt inclement weather conditions.
Advantage of the present invention is: due in the contact tube at secondary winding center through there being multiturn primary winding coils, thereby increased the electric current of little current ratio, expanded the scope of electric current output, changed conventional current transformer current than large situation; Owing to being provided with overvoltage protection, thereby can play protection to the device of current transformer under the unbalanced state of voltage, particularly a winding is effectively protected; Because winding is evenly distributed in the protective cover outside housing through contact tube, thereby it is even to make to respond between winding magnetic flux distribution, reduces leakage flux impact, makes winding precision higher; Owing to being provided with inside and outside insulation board, thereby can effectively housing, protective cover and conductive seat be separated; Due to rational in infrastructure, superior performance, so there is very large practical and popularizing value.
Accompanying drawing explanation
Below with reference to accompanying drawing, the present invention is described further:
Accompanying drawing 1 is the structural representation of a kind of externally-wound type current transformer of the present invention;
Accompanying drawing 3 is the structural representations along the A--A section of accompanying drawing 1.
Embodiment
With reference to accompanying drawing 1, accompanying drawing 2, accompanying drawing 3, it arranges 1 by primary conductive a kind of externally-wound type current transformer of the present invention, a winding 2, housing 3, contact tube 4, secondary winding 5, secondary busbar 6, overvoltage protection device 7, insulated terminal 8, interior insulation board 9, external insulation plate 10, sleeve pipe 11, base 12, secondary wiring terminals 13, protective cover 14, conductive seat 15 forms, sleeve pipe 11 is arranged on base 12, be provided with secondary wiring terminals 13 in the bottom of base 12, on sleeve pipe 11, be provided with housing 3, in the inner chamber of housing 3, be provided with secondary winding 5, contact tube 4 is through secondary winding 5, primary conductive row 1 is connected with a winding 2 by lead-in wire, be provided with protective cover 14 in the outside of housing 3, one time winding 2 is arranged in protective cover 14 through contact tube 4, a described winding 2 is the induction coil of at least one circle through contact tube 4, and one time winding 2 is evenly distributed in the protective cover 14 outside housing 3 through contact tube 4, on housing 3, be provided with secondary busbar 6, each grade coil tap of a winding 2 is connected with secondary busbar 6 respectively, described secondary busbar 6 is a multiple-contact device, can be connected from the different number of turn coil contacts of a winding 2 respectively according to electric pressure, contact tube 4 is connected with primary conductive row 1 by conductive seat 15, on conductive seat 15, be provided with insulated terminal 8, be provided with primary conductive row 1 on insulated terminal 8, insulated terminal 8 separates the lead wire insulation of primary conductive row 1 and a winding 2, overvoltage protection device 7 is arranged on conductive seat 15 and by lead-in wire and is connected with a winding 2, between housing 3 and conductive seat 15, be provided with interior insulation board 9, between conductive seat 15 and protective cover 14, be provided with external insulation plate 10.
Claims (4)
- An externally-wound type current transformer it by primary conductive row (1), a winding (2), housing (3), contact tube (4), secondary winding (5), secondary busbar (6), overvoltage protection device (7), insulated terminal (8), interior insulation board (9), external insulation plate (10), sleeve pipe (11), base (12), secondary wiring terminals (13), protective cover (14), conductive seat (15) composition, sleeve pipe (11) is arranged on base (12), be provided with secondary wiring terminals (13) in the bottom of base (12), on sleeve pipe (11), be provided with housing (3), in the inner chamber of housing (3), be provided with secondary winding (5), contact tube (4) is through secondary winding (5), it is characterized in that: primary conductive row (1) is connected with a winding (2) by lead-in wire, be provided with protective cover (14) in the outside of housing (3), a winding (2) is arranged in protective cover (14) through contact tube (4), on housing (3), be provided with secondary busbar (6), each grade coil tap of a winding (2) is connected with secondary busbar (6) respectively, contact tube (4) is connected with primary conductive row (1) by conductive seat (15), on conductive seat (15), be provided with insulated terminal (8), be provided with primary conductive row (1) on insulated terminal (8), insulated terminal (8) separates primary conductive row (1) with the lead wire insulation of a winding (2), overvoltage protection device (7) be arranged on conductive seat (15) go up and pass through lead-in wire be connected with a winding (2), between housing (3) and conductive seat (15), be provided with interior insulation board (9), between conductive seat (15) and protective cover (14), be provided with external insulation plate (10).
- 2. a kind of externally-wound type current transformer according to claim 1, is characterized in that: a described winding (2) is at least one circle is through the induction coil of contact tube (4).
- 3. a kind of externally-wound type current transformer according to claim 1 and 2, is characterized in that: a described winding (2) is evenly distributed in the outer protective cover (14) of housing (3) through contact tube (4).
- 4. a kind of externally-wound type current transformer according to claim 1, is characterized in that: described secondary busbar (6) is a multiple-contact device, can be connected from the different number of turn coil contacts of a winding (2) respectively according to electric pressure.
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 true CN103811165A (en) | 2014-05-21 |
| CN103811165B 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) |
Cited By (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 (8)
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| DE3521518A1 (en) * | 1985-05-20 | 1986-11-20 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | High-voltage converter |
| 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 |
| CN201392730Y (en) * | 2009-04-24 | 2010-01-27 | 西安爱博电气有限公司 | High-voltage SF6 current transformer |
| WO2010061399A1 (en) * | 2008-11-27 | 2010-06-03 | Areva T&D India Ltd. | A current transformer |
| CN102064014A (en) * | 2010-12-06 | 2011-05-18 | 保定天威集团有限公司 | Multi-turn inverted 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 |
| 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 |
Family Cites Families (3)
| 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 |
-
2012
- 2012-11-07 CN CN201210440458.XA patent/CN103811165B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3521518A1 (en) * | 1985-05-20 | 1986-11-20 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | High-voltage converter |
| 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 |
| CN102064014A (en) * | 2010-12-06 | 2011-05-18 | 保定天威集团有限公司 | Multi-turn inverted 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 |
| 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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103811165B (en) | 2017-02-08 |
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