CN204558232U - Current transformer - Google Patents
Current transformer Download PDFInfo
- Publication number
- CN204558232U CN204558232U CN201520287319.7U CN201520287319U CN204558232U CN 204558232 U CN204558232 U CN 204558232U CN 201520287319 U CN201520287319 U CN 201520287319U CN 204558232 U CN204558232 U CN 204558232U
- Authority
- CN
- China
- Prior art keywords
- iron core
- primary
- insulation shell
- current transformer
- secondary coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009413 insulation Methods 0.000 claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000004804 winding Methods 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 8
- 239000010949 copper Substances 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Transformers For Measuring Instruments (AREA)
Abstract
Current transformer, comprises primary side, secondary side and insulation shell.Primary side comprises two primary connection plates and primary winding.Two primary connection plates are connected with primary winding respectively by a copper strips of correspondence.High voltage shield is provided with outside primary winding.Secondary side comprises the first iron core and the second iron core.First iron core is provided with the first secondary coil.The first low pressure screen is provided with outside first secondary coil.Second iron core is provided with the second secondary coil.The second low pressure screen is provided with outside second secondary coil.Be provided with at least one bottom insulation shell and install inserts, the surrounding of installing inserts offers seal groove.The volume of this instrument transformer is far smaller than the volume of present conventional instrument transformer, takes up room little.This current transformer structure is simple, easy for installation.Inner employing full-shield structure, makes product partial discharge quantity little.
Description
Technical field
The utility model belongs to current transformer field, particularly current transformer, is applied in 35kV gas-insulated cabinet.
Background technology
Because modern power network is to the development of electrical power trans mission/distribution system automation direction and high-voltage electrical equipment development, traditional electromagnetic current transducer product not too adapts to the needs of power network development.Current transformer is not only proposed to the requirement of miniaturization, high reliability, but also it is completely isolated to require that it has high-low pressure, the features such as bandwidth and iron-free magnetic saturation.Therefore this type instrument transformer is developed, for 35KVSF6 gas insulation switch cabinet, for electric current, electric energy measurement and used for relay protection.
Utility model content
The purpose of this utility model is to provide current transformer, and this current transformer structure is simple, easy for installation.
The technical scheme adopted is:
Current transformer, comprises primary side, secondary side and insulation shell.
Its technical essential is:
Primary side comprises the first primary connection plate, the second primary connection plate and primary winding.
First primary connection plate is connected with primary winding by the first copper strips.
Second primary connection plate is connected with primary winding by the second copper strips.
High voltage shield is provided with outside primary winding.
Secondary side comprises the first iron core and the second iron core.
First iron core is provided with the first secondary coil.The first low pressure screen is provided with outside first secondary coil.
Second iron core is provided with the second secondary coil.The second low pressure screen is provided with outside second secondary coil.
Primary winding is set on the first iron core and the second iron core.
Be provided with at least one bottom insulation shell and inserts is installed.
Insulation shell is positioned at around each installation inserts and all offers seal groove.
Described insulation shell can be epoxy resin housing.
The length ab of described insulation shell can be 345mm, and width cd can be 200mm.
The height summation that first primary connection plate is positioned at the height of height outside insulation shell upper surface and insulation shell can be 312mm.
The volume of this instrument transformer is far smaller than the volume of present conventional instrument transformer, takes up room little.
Described insulation shell surface can be provided with metal screen layer.
Described seal groove can be annular seal groove.Described installation inserts can be four.
Technical parameter: model: LZZB-35CQ.Current ratio: 100-2000/5.Accuracy class: 0.2S/10P.Rated output capacity: 20VA.Frequency: 50/60HZ.Type of device: indoor.
A, measurement level can adopt silicon steel sheet and minicrystal iron core to combine, and metering 0.2S level meets higher than measuring requirement completely between 1% and 120%.
B, inner employing full-shield structure, make product partial discharge quantity be less than 5PC.
C, the mounting means used, remove traditional bottom board type structure.
Its advantage is:
This current transformer structure is simple, easy for installation.Inner employing full-shield structure, makes product partial discharge quantity little.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model.
Fig. 2 is end view of the present utility model.
Fig. 3 is vertical view of the present utility model.
Fig. 4 is the cutaway view installing inserts and seal groove.
Embodiment
Current transformer, comprises primary side, secondary side and insulation shell 10.
Primary side comprises the first primary connection plate 1, second primary connection plate and primary winding 3.
First primary connection plate 1 is connected with primary winding 3 by the first copper strips 2.
Second primary connection plate is connected with primary winding 3 by the second copper strips.
High voltage shield 5 is provided with outside primary winding 3.
Secondary side comprises the first iron core 4 and the second iron core 6.
First iron core 4 is provided with the first secondary coil.The first low pressure screen 8 is provided with outside first secondary coil.
Second iron core 6 is provided with the second secondary coil.The second low pressure screen 9 is provided with outside second secondary coil.
Primary winding 3 is set on the first iron core 4 and the second iron core 6.
First secondary coil connects the first secondary outlet terminal.
Second secondary coil connects the second secondary outlet terminal.
Be provided with four bottom insulation shell 10 and inserts 11 is installed.
Insulation shell 10 is positioned at around each installation inserts 11 and all offers seal groove 12.
Described insulation shell 10 is epoxy resin housing.
The length ab of described insulation shell 10 is 345mm, and width cd is 200mm.
The height that first primary connection plate 1 and the second primary connection plate are positioned at outside insulation shell 10 upper surface is h
1for 3mm, the height h of insulation shell 10
2for 309mm, h
1+ h
2=height summation H, namely device body height H is 312mm, as depicted in figs. 1 and 2.
Insulation shell 10 surface is provided with metal screen layer 7.
Described seal groove 12 is annular seal groove.
Described low pressure screen and high voltage shield are semiconductive ply of paper.
The width of the first iron core 4 is less than the width of the second iron core 6 as shown in Figure 1.
Install bottom instrument transformer around inserts 11 and take seal groove structure, the sealing of installing inserts 11 place can be ensured when mounted, instrument transformer becomes pour mass (insulation shell 10) through poured with epoxy resin gestalt, is used for shielding instrument transformer outermost layer electric field except secondary outlet terminal plane and all the other positions of primary connection board plane all spray layer of metal screen 7.
The inner device body of this model gas-filling cabinet Current Transformer adopts high-low pressure shielding process, and primary current introduces two copper strips by two primary connection plates, and primary current produces magnetic flux by primary winding 3 in two iron cores.
In two secondary coils, produce induced current provides signal to secondary device.Primary winding 3 high pressure be provided with described in high voltage shield 5(is 40.5kV), be respectively equipped with low pressure screen (described low pressure is 0V) outside two secondary coils, high-low pressure shielding prevent internal discharge thus device body is done less so make instrument transformer overall the prerequisite lower volume meeting parameter do less.
Claims (7)
1. current transformer, comprises primary side, secondary side and insulation shell (10); It is characterized in that:
Primary side comprises the first primary connection plate (1), the second primary connection plate and primary winding (3);
First primary connection plate (1) is connected with primary winding (3) by the first copper strips (2);
Second primary connection plate is connected with primary winding (3) by the second copper strips;
Primary winding (3) outside is provided with high voltage shield (5);
Secondary side comprises the first iron core (4) and the second iron core (6);
First iron core (4) is provided with the first secondary coil; The first low pressure screen (8) is provided with outside first secondary coil;
Second iron core (6) is provided with the second secondary coil; The second low pressure screen (9) is provided with outside second secondary coil;
Primary winding (3) is set on the first iron core (4) and the second iron core (6);
Insulation shell (10) bottom is provided with at least one and installs inserts (11);
Insulation shell (10) is positioned at around each installation inserts (11) and all offers seal groove (12).
2. current transformer according to claim 1, is characterized in that:
Described insulation shell (10) is epoxy resin housing.
3. current transformer according to claim 1, is characterized in that: the length ab of described insulation shell (10) is 345mm, and width cd is 200mm.
4. current transformer according to claim 3, is characterized in that:
First primary connection plate (1) height be positioned at outside insulation shell (10) upper surface is 3mm, and the height of insulation shell (10) is 309mm, and height summation is 312mm.
5. current transformer according to claim 1, is characterized in that: described insulation shell (10) surface is provided with metal screen layer (7).
6. current transformer according to claim 1, is characterized in that: described seal groove (12) is annular seal groove.
7. current transformer according to claim 1, is characterized in that: described installation inserts (11) is four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287319.7U CN204558232U (en) | 2015-05-07 | 2015-05-07 | Current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520287319.7U CN204558232U (en) | 2015-05-07 | 2015-05-07 | Current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204558232U true CN204558232U (en) | 2015-08-12 |
Family
ID=53833316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520287319.7U Expired - Fee Related CN204558232U (en) | 2015-05-07 | 2015-05-07 | Current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204558232U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988037A (en) * | 2016-07-08 | 2016-10-05 | 武汉电联电力电气技术有限公司 | High-voltage three-potential insulated isolated current sensor |
| CN108461267A (en) * | 2018-03-15 | 2018-08-28 | 大连北方互感器集团有限公司 | A kind of current transformer with primary coil high-tension shielding |
| CN108597828A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Current Transformer in a kind of 24kV middle-placed switch cabinets |
| CN108630419A (en) * | 2018-06-04 | 2018-10-09 | 湖北大二互科技股份有限公司 | Combined complete formula current transformer |
| CN111370203A (en) * | 2020-03-06 | 2020-07-03 | 广东得为科技有限公司 | Voltage transformer with high IP protection level |
| CN112397287A (en) * | 2020-11-12 | 2021-02-23 | 湖北大二互科技股份有限公司 | Current transformer for CGIS |
-
2015
- 2015-05-07 CN CN201520287319.7U patent/CN204558232U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988037A (en) * | 2016-07-08 | 2016-10-05 | 武汉电联电力电气技术有限公司 | High-voltage three-potential insulated isolated current sensor |
| CN108461267A (en) * | 2018-03-15 | 2018-08-28 | 大连北方互感器集团有限公司 | A kind of current transformer with primary coil high-tension shielding |
| CN108597828A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Current Transformer in a kind of 24kV middle-placed switch cabinets |
| CN108597828B (en) * | 2018-04-27 | 2020-11-24 | 上海大一互电力电器有限公司 | 24kV centrally installed switchgear internal current transformer |
| CN108630419A (en) * | 2018-06-04 | 2018-10-09 | 湖北大二互科技股份有限公司 | Combined complete formula current transformer |
| CN108630419B (en) * | 2018-06-04 | 2023-09-05 | 湖北大二互科技股份有限公司 | Combined sleeve type current transformer |
| CN111370203A (en) * | 2020-03-06 | 2020-07-03 | 广东得为科技有限公司 | Voltage transformer with high IP protection level |
| CN112397287A (en) * | 2020-11-12 | 2021-02-23 | 湖北大二互科技股份有限公司 | Current transformer for CGIS |
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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: 20150812 Termination date: 20190507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |