CN202930200U - Outer winding type current transformer - Google Patents
Outer winding type current transformer Download PDFInfo
- Publication number
- CN202930200U CN202930200U CN 201220582460 CN201220582460U CN202930200U CN 202930200 U CN202930200 U CN 202930200U CN 201220582460 CN201220582460 CN 201220582460 CN 201220582460 U CN201220582460 U CN 201220582460U CN 202930200 U CN202930200 U CN 202930200U
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- China
- Prior art keywords
- winding
- protective cover
- housing
- current transformer
- primary
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- Expired - Lifetime
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Abstract
The utility model relates to an outer winding type current transformer used in the electric power industry, which consists of a primary conducting bar, a primary winding, a shell, a conducting tube, a secondary winding, a secondary conducting bar, an overvoltage protector, an insulating terminal, inner and outer insulation boards, a protective cover, a conducting seat 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 passes through the conducting tube and is arranged in the protective cover; all level coil taps of the primary winding are respectively connected with the secondary conducting bar; as a plurality of turns of primary winding coils pass through the conducting tube in the secondary winding, the current with low current ratio is increased, and the current output scope is enlarged; due to the arrangement of the overvoltage protector, devices in the current transformer can be protected; and as the primary winding passes through the conducting tube and is uniformly distributed in the protective cover outside the shell, the winding precision is higher.
Description
Technical field
The utility model 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 the utility model structure at present.Existing current transformer is due to the reason of its structure, generally be only applicable to the occasion of large current ratio, continuous increase along with development and the digital circuit checkout equipment of science and technology, for large current ratio current transformer during for detection of equipment, need that also electric current is carried out the 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 due to the reason of its structure at high voltage, easily cause the damage of current transformer under the inclement weather conditions such as thunderbolt, so the limitation that this type of instrument transformer uses is larger, still can not satisfy the existing actual needs of producing, low in order to satisfy cost, the requirement that curent change is large, so be necessary existing instrument transformer is improved, to satisfy actual needs.
Summary of the invention
The purpose of this utility model is that a kind of improvement on existing current transformer basis will be provided, and realizes multiple current ratio by the form of wearing around a winding on existing secondary winding, is convenient to detect and a kind of externally-wound type current transformer of voltage protection.
technical characterictic of the present utility model is: considering compact conformation, be designed on the basis of dependable performance be arranged by primary conductive, a winding, housing, contact tube, secondary winding, the secondary busbar, overvoltage protection device, insulated terminal, interior insulation board, the external insulation plate, sleeve pipe, base, secondary wiring terminals, protective cover, a kind of externally-wound type current transformer that conductive seat forms, sleeve pipe is arranged on base, bottom at base is provided with secondary wiring terminals, be provided with housing on sleeve pipe, be provided with secondary winding in the inner chamber of housing, contact tube passes secondary winding, primary conductive row be connected with a winding by lead-in wire, the outside at housing is provided with protective cover, and a winding passes contact tube and is arranged in protective cover, be provided with the secondary busbar on housing, each grade coil tap of a winding is connected with the secondary busbar respectively, contact tube is connected with primary conductive row by conductive seat, be provided with insulated terminal on conductive seat, 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, be provided with interior insulation board between housing and conductive seat, be provided with the external insulation plate between conductive seat and protective cover.
A described winding is the induction coil that at least one circle passes contact tube.
A described winding passes contact tube and is evenly distributed in the outer protective cover of housing.
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.
During 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 through electromagnetic induction to form induced current on secondary winding, and through secondary wiring terminals, current information is passed to detecting instrument, metering, control device; The induced current that forms around secondary winding through the electric current in a winding pass to again in the Digital Detecting device for detection of; The 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 that destroying primary winding coils under the high pressure inclement weather conditions such as prevent from being struck by lightning arranges.
The utility model has the advantages that: passed the multiturn primary winding coils in the contact tube at secondary winding center, thereby increased the electric current of little current ratio, enlarged the scope of electric current output, changed the 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; Be evenly distributed in the outer protective cover of housing because winding passes contact tube, thereby make between winding the induction magnetic flux distribution even, reduce the leakage flux impact, make the 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 is so there is very large practical and popularizing value.
Description of drawings
Below with reference to accompanying drawing, the utility model is described further:
Accompanying drawing 1 is the structural representation of a kind of externally-wound type current transformer of the utility model;
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 utility model, 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, be provided with housing 3 on sleeve pipe 11, be provided with secondary winding 5 in the inner chamber of housing 3, contact tube 4 passes 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, a winding 2 passes contact tube 4 and is arranged in protective cover 14, a described winding 2 passes the induction coil of contact tube 4 at least one circle, a winding 2 passes contact tube 4 and is evenly distributed in the outer protective cover 14 of housing 3, be provided with secondary busbar 6 on housing 3, 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, be provided with insulated terminal 8 on conductive seat 15, be provided with primary conductive row 1 on insulated terminal 8, insulated terminal 8 separates the lead wire insulation of 1 and winding 2 of primary conductive row, overvoltage protection device 7 is arranged on conductive seat 15 and by lead-in wire and is connected with a winding 2, be provided with interior insulation board 9 between housing 3 and conductive seat 15, be provided with external insulation plate 10 between conductive seat 15 and protective cover 14.
Claims (4)
1. externally-wound type current transformer, it is 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) forms, sleeve pipe (11) is arranged on base (12), be provided with secondary wiring terminals (13) in the bottom of base (12), be provided with housing (3) on sleeve pipe (11), be provided with secondary winding (5) in the inner chamber of housing (3), contact tube (4) passes 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) passes contact tube (4) and is arranged in protective cover (14), be provided with secondary busbar (6) on housing (3), 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), be provided with insulated terminal (8) on conductive seat (15), 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 the lead-in wire be connected with a winding (2), be provided with interior insulation board (9) between housing (3) and conductive seat (15), be provided with external insulation plate (10) between conductive seat (15) and protective cover (14).
2. a kind of externally-wound type current transformer according to claim 1 is characterized in that: a described winding (2) passes the induction coil of contact tube (4) at least one circle.
3. a kind of externally-wound type current transformer according to claim 1 and 2 is characterized in that: a described winding (2) passes contact tube (4) and is evenly distributed in the outer protective cover (14) of housing (3).
4. a kind of externally-wound type current transformer according to claim 1, it 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 |
|---|---|---|---|
| CN 201220582460 CN202930200U (en) | 2012-11-07 | 2012-11-07 | Outer winding type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220582460 CN202930200U (en) | 2012-11-07 | 2012-11-07 | Outer winding type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202930200U true CN202930200U (en) | 2013-05-08 |
Family
ID=48220136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220582460 Expired - Lifetime CN202930200U (en) | 2012-11-07 | 2012-11-07 | Outer winding type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202930200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811165A (en) * | 2012-11-07 | 2014-05-21 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
-
2012
- 2012-11-07 CN CN 201220582460 patent/CN202930200U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103811165A (en) * | 2012-11-07 | 2014-05-21 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |