CN201936737U - Three-phase compact combined-type current transformer - Google Patents
Three-phase compact combined-type current transformer Download PDFInfo
- Publication number
- CN201936737U CN201936737U CN201020660854XU CN201020660854U CN201936737U CN 201936737 U CN201936737 U CN 201936737U CN 201020660854X U CN201020660854X U CN 201020660854XU CN 201020660854 U CN201020660854 U CN 201020660854U CN 201936737 U CN201936737 U CN 201936737U
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- phase
- current transformer
- iron core
- mutual inductor
- type current
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Abstract
The utility model belongs to the technical field of power transmission and distribution, and provides a three-phase compact combined-type current transformer. The three-phase compact combined-type current transformer comprises a zero sequence current transformer and an A/C phase current transformer with an insulator arranged therebetween. The three-phase compact combined-type current transformer designed for a user boundary load switch has the advantages that the accuracy is high, the overall size of the current transformer can meet the requirement of the assembly mode of the boundary load switch, the installation is convenient and fast, and the construction time is saved.
Description
Technical field
The utility model relates to current transformer, relates in particular to a kind of three-phase integrated combined electrical current transformer.
Background technology
In China; along with annual national to urban distribution network; deepening constantly of upgrade of rural power grids; reliability and fail safe in the power supply in service of power distribution network improve constantly; backbone breaks down and the possibility of accident reduces greatly; at this time the branch line accident causes the ratio of backbone power failure constantly to raise; the branch line fault becomes one of principal element that influences the power distribution network safe operation day by day; because of involving the accident that the whole piece feeder line has a power failure, sole user's fault and protection mismate happen occasionally; thereby cause larger area to have a power failure, adjacent distribution user is caused direct economic loss under the non-malfunction.At present, 10KV overhead distribution to each user's branch line porch is being used outdoor on-pole switch and isolating switch in a large number, generally be manual operation, be mainly used in normal branch, the effect of zygonema road load current and insulating power supply, the function that does not have automatic user-isolated side accident, for this reason, the research and development and the production of user demarcation load switch have been drawn, vital parts are three-phase integrated combined electrical current transformers in the demarcation load switch, its precision of monomer-type instrument transformer that tradition is used is lower, insensitive or error is big to little electric current, can not reach the requirement of demarcation load switch technical indicator, the simultaneously profile of the monomer instrument transformer continued to use of tradition and the assembling form that size does not meet demarcation load switch yet are so monomer instrument transformer of the prior art exists the low and overall dimension of precision not meet the defective of demarcation load switch assembling form.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of precision height and overall dimension to meet the demarcation load switch technical performance and meets the three-phase integrated combined electrical current transformer of assembling form fully.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of three-phase integrated combined electrical current transformer comprises zero sequence current mutual inductor and the A/C phase current mutual inductor that is arranged on wherein, is provided with insulator between the two.
Described zero sequence current mutual inductor is made up of winding and ellipse iron core, and this oval-shaped iron core is formed by high-magnetodensity silicon steel plate packing or coiling.
Described A/C phase current mutual inductor comprise A phase iron core and be wound on winding and C mutually iron core and be wound on winding, A phase iron core and C phase iron core are " O " shape, are formed by high-magnetodensity silicon steel plate packing or coiling.
The beneficial effects of the utility model: for user demarcation load switch designs, so have the advantage that precision height, overall dimension can satisfy the requirement of demarcation load switch assembling form; Quick and easy for installation, reduce the engineering time.
Description of drawings
Fig. 1 is the cutaway view according to the three-phase integrated combined electrical current transformer of the utility model preferred embodiment.
Embodiment
Referring to Fig. 1, a kind of three-phase integrated combined electrical current transformer comprises zero sequence current mutual inductor 1, A/C phase current mutual inductor 2 and insulator 3, A/C phase current mutual inductor 2 and insulator 3 all are arranged in the current transformer 1, and insulator 3 makes insulation between current transformer 1 and the A/C phase current mutual inductor 2.Zero sequence current mutual inductor 1 internal structure mainly is made up of winding and ellipse iron core, and the ellipse iron core is formed by high-magnetodensity silicon steel plate packing or coiling.A/C phase current mutual inductor 2 comprise A phase iron core and be wound on winding and C mutually iron core and be wound on winding, A phase iron core and C phase iron core are " O " shape, are formed by high-magnetodensity silicon steel plate packing or coiling.Insulator 3 is by being cast into one by epoxy resin by technological requirement after the mold position, is placed on then in the air of normal temperature and leaves standstill cooling forming.Its internal structure is passed through epoxy resin mutually insulated each other.
The utility model is applied on the user demarcation load switch, and user demarcation load switch is the brand-new outdoor primary line way switch equipment of a kind of function.Family demarcation load switch body adopts vacuum load switch, sulfur hexafluoride gas-insulating.The vacuum tube string adopts the asynchronous interlock isolation switch of connection, and disconnecting link closes a floodgate prior to vacuum tube, and the back is in the vacuum tube separating brake.The built-in three-phase integrated combined electrical current transformer of Switch main body, 1 alternate PT and two-phase voltage sensor.The measurement and control unit outward appearance adopts the form of " cap ", hardware is mainly by CPU board, power supply and switch control board, the panel composition is set parameter and relevant index signal is formed, it is mainly used between the T-shape separation of 10KV overhead distribution and user's branch line, by the current status on the three-phase integrated combined electrical current transformer detection line, simultaneously fault current is offered the measurement and control unit analysis, finally send the separating brake order and give switch sections by measurement and control unit, switch is carried out the separating brake action, thereby finish automatic disengagement failure side electric current, prevent that the user side accident from feeding through to the power distribution circuit, cause the accident of large-area power-cuts in the electric power networks, thereby guarantee the power supply reliability of distribution network.
Profile of the present utility model and size are specific for described user demarcation load switch designs, so have the advantage that precision height, overall dimension can satisfy the requirement of demarcation load switch assembling form.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, do not breaking away under the prerequisite of the utility model design, make concrete change or change and all belong to protection range of the present utility model.
Claims (3)
1. a three-phase integrated combined electrical current transformer is characterized in that: comprise zero sequence current mutual inductor and the A/C phase current mutual inductor that is arranged on wherein, be provided with insulator between the two.
2. three-phase integrated combined electrical current transformer according to claim 1 is characterized in that: described zero sequence current mutual inductor is made up of winding and ellipse iron core, and this oval-shaped iron core is formed by high-magnetodensity silicon steel plate packing or coiling.
3. three-phase integrated combined electrical current transformer according to claim 1 and 2 is characterized in that: described A/C phase current mutual inductor comprise A phase iron core and be wound on winding and C mutually iron core and be wound on winding; A phase iron core and C phase iron core are " O " shape, are formed by high-magnetodensity silicon steel plate packing or coiling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020660854XU CN201936737U (en) | 2010-12-15 | 2010-12-15 | Three-phase compact combined-type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020660854XU CN201936737U (en) | 2010-12-15 | 2010-12-15 | Three-phase compact combined-type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201936737U true CN201936737U (en) | 2011-08-17 |
Family
ID=44448253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020660854XU Expired - Fee Related CN201936737U (en) | 2010-12-15 | 2010-12-15 | Three-phase compact combined-type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201936737U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568802A (en) * | 2012-01-11 | 2012-07-11 | 北京瑞奇恩互感器设备有限公司 | Three-phase integrated current transformer |
-
2010
- 2010-12-15 CN CN201020660854XU patent/CN201936737U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568802A (en) * | 2012-01-11 | 2012-07-11 | 北京瑞奇恩互感器设备有限公司 | Three-phase integrated current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20111215 |