CN203366980U - Phase sequence and zero sequence all-in-one current transformer - Google Patents
Phase sequence and zero sequence all-in-one current transformer Download PDFInfo
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- CN203366980U CN203366980U CN 201320412205 CN201320412205U CN203366980U CN 203366980 U CN203366980 U CN 203366980U CN 201320412205 CN201320412205 CN 201320412205 CN 201320412205 U CN201320412205 U CN 201320412205U CN 203366980 U CN203366980 U CN 203366980U
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Abstract
A phase sequence and zero sequence all-in-one current transformer comprises three phase sequence current coils which are arranged in parallel, wherein the outer circle of each phase sequence current coil is coaxially provided with a zero sequence current coil, insulating cylinders are sleeved with the phase sequence current coils respectively, then, the phase sequence current coils are fixed to a die and fixedly sealed through epoxy resin through pouring, outgoing line terminals of the phase sequence current coils and outgoing line terminals of the zero sequence current coils are led out of the lower portion of the poured body, and an installation fixed embedded piece is arranged at the bottom of the poured body. The phase sequence and zero sequence all-in-one current transformer is characterized in that the phase sequence and zero sequence all-in-one structural type is adopted, the structural type of integrating zero sequence current detection and phase sequence current detection is adopted, the epoxy resin poured insulating structure is adopted, the center penetrating structure is adopted, a three-phase cable or a three-phase bus directly penetrates through a window reserved for the product, the installation embedded piece is arranged at the bottom of the product, and the outgoing line terminals of the coils are led out of the lower portion of the product.
Description
Technical field
The utility model relates to the measurement and control area of electrical network, especially a kind of phase sequence zero sequence integral type current transformer.
Background technology
At present, in non-useful earthing electric network, need configure respectively three single-phase current transformers and carry out short-circuit protection, configure a zero sequence current mutual inductor and carry out one-phase ground protection or configure three single-phase earthing voltage transformers carrying out one-phase ground protection.The components and parts use is many like this, takes up room large, can not meet miniaturization, integrated, standardized requirement, particularly some special occasions, and for example on-pole switch just can't be installed so many components and parts at all.
Current transformer based on the compact structure design, its zero-sequence transformer is surrounded three phase sequence instrument transformers, when three-phase current passes through three phase-sequence current instrument transformers, also be equivalent to its zero-sequence current and passed through zero sequence current mutual inductor, utilizing space to greatest extent, improve the Product Precision performance, improved the saturated multiple of product.
Summary of the invention
The purpose of this utility model is to realize to non-effective getting access to grid carried out short-circuit protection and one-phase ground protection simultaneously and taken into account current measurement and the phase sequence zero sequence integral type current transformer of electric energy metrical.
The technical solution of the utility model is achieved in that
A kind of phase sequence zero sequence integral type current transformer is provided, it is characterized in that: it comprises three phase-sequence current coils placed side by side, the outer ring of described phase-sequence current coil is coaxially arranged with the zero-sequence current coil, after described phase-sequence current coil is nested with on insulating cylinder, all be fixed on mould, then by the poured with epoxy resin sealing and draw the outlet terminal of phase-sequence current coil and zero-sequence current coil from the pour mass bottom, in the pour mass bottom, be provided with installable fixedly inserts.
Phase sequence zero sequence integral type current transformer as above is characterized in that: the magnetic core of phase-sequence current coil adopts the cold-rolled orientation silicon steel sheet of high magnetic permeability, high saturated magnetic induction.
Phase sequence zero sequence integral type current transformer as above, it is characterized in that: the magnetic core of zero sequence coil adopts the cold-rolled orientation silicon steel iron core of microcrystalline core that initial permeability is high and high magnetic permeability, high saturated magnetic induction to stack and forms, so not only guaranteed certainty of measurement, but also solution be apt to the anti-saturation performance of product.
The utility model can transmit the three-phase phase-sequence current signal simultaneously and zero sequence current signal is protected for metering, measurement, control, and its characteristics are: (1) adopts phase sequence zero sequence integral structure form; (2) adopt zero-sequence current to detect with phase-sequence current and detect the version together with being synthesized to; (3) adopt the poured with epoxy resin insulation system; (4) adopt the punching structure, threephase cable or three-phase bus are directly through the reserved window of product; (5) the product bottom is provided with the installation inserts; (6) draw the outlet terminal of phase sequence zero sequence coil from the product bottom.
The accompanying drawing explanation
Fig. 1 is main TV structure figure of the present utility model.
Fig. 2 is polycrystalline substance schematic diagram of the present utility model.
Fig. 3 is the left TV structure figure of the utility model shown in Fig. 1.
Fig. 4 is order 4 zero sequence core const ruction figure.
Embodiment
Below in conjunction with accompanying drawing 1 to accompanying drawing 4, embodiment of the present utility model is described:
A kind of phase sequence zero sequence integral type current transformer is provided, it comprises three phase-sequence current coils 2 placed side by side, the outer ring of described phase-sequence current coil 2 is coaxially arranged with zero-sequence current coil 6, described phase-sequence current coil 2 all is fixed on mould after being nested with on insulating cylinder 3, then by the poured with epoxy resin sealing and draw the outlet terminal of phase-sequence current coil 2 and zero-sequence current coil 6 from the pour mass bottom, in the pour mass bottom, be provided with installable fixedly inserts 8.
With further reference to Fig. 1, Fig. 3, Fig. 4, above-mentioned phase sequence zero sequence integral type current transformer, it is by phase sequence magnetic core 1 and around the phase-sequence current coil 2 on phase sequence magnetic core 1, wrap in the outer zero sequence magnetic core of phase-sequence current coil 24 and around the zero-sequence current coil 6 on the zero sequence magnetic core, by insulating cylinder 3, be positioned on mould, use again epoxy resin 5 sealings.
Described zero sequence magnetic core 4 and zero-sequence current coil 6 are fixed on three phase sequence magnetic cores 1 and phase-sequence current coil 2 outsides.
The centre-to-centre spacing of described three phase sequence magnetic cores equals to use the three-phase spaced apart of this device.
With further reference to Fig. 2, in the product bottom, installation inserts 8 is set and fixedly mounts for product.
With further reference to Fig. 3, by the product bottom, draw the outlet terminal 7 of phase sequence zero sequence coil for external cabling.
Referring to Fig. 4, zero sequence magnetic core 4 is stacked and is formed by the cold-rolled orientation silicon steel iron core 4.2 of the microcrystalline core 4.1 of high initial magnetoconductivity and high magnetic permeability, high saturated magnetic induction.
The utility model employing punching structure, threephase cable or three-phase bus, directly through the reserved window input signal of product, are protected for metering, measurement, control by outlet terminal 7 output signals of phase sequence zero sequence coil.
Although above shown detailed embodiment of the present utility model, apparent, those skilled in the art is under prerequisite of the present utility model, can carry out the part modifications and changes; The content of mentioning in description above and accompanying drawing, only as illustrative case, not, as to restriction of the present utility model, has the phase sequence zero sequence integral type current transformer of above-mentioned technical characterictic, all falls into protection range.
Claims (3)
1. a phase sequence zero sequence integral type current transformer, it is characterized in that: it comprises three phase-sequence current coils placed side by side, the outer ring of described phase-sequence current coil is coaxially arranged with the zero-sequence current coil, after described phase-sequence current coil is nested with on insulating cylinder, all be fixed on mould, then by the poured with epoxy resin sealing and draw the outlet terminal of phase-sequence current coil and zero-sequence current coil from the pour mass bottom, in the pour mass bottom, be provided with installable fixedly inserts.
2. phase sequence zero sequence integral type current transformer as claimed in claim 1, is characterized in that: the magnetic core employing high magnetic permeability of described phase-sequence current coil, the cold-rolled orientation silicon steel sheet of high saturated magnetic induction.
3. phase sequence zero sequence integral type current transformer as claimed in claim 1 is characterized in that: the magnetic core of described zero-sequence current coil adopts the cold-rolled orientation silicon steel iron core of microcrystalline core that initial permeability is high and high magnetic permeability, high saturated magnetic induction to stack and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412205 CN203366980U (en) | 2013-07-11 | 2013-07-11 | Phase sequence and zero sequence all-in-one current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320412205 CN203366980U (en) | 2013-07-11 | 2013-07-11 | Phase sequence and zero sequence all-in-one current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203366980U true CN203366980U (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320412205 Expired - Fee Related CN203366980U (en) | 2013-07-11 | 2013-07-11 | Phase sequence and zero sequence all-in-one current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203366980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024343A (en) * | 2016-07-26 | 2016-10-12 | 中国西电电气股份有限公司 | Transformer measuring device |
-
2013
- 2013-07-11 CN CN 201320412205 patent/CN203366980U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106024343A (en) * | 2016-07-26 | 2016-10-12 | 中国西电电气股份有限公司 | Transformer measuring device |
| CN106024343B (en) * | 2016-07-26 | 2017-08-25 | 中国西电电气股份有限公司 | A kind of transformer measurement apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20200711 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |