CN202307493U - Electronic type current transformer - Google Patents
Electronic type current transformer Download PDFInfo
- Publication number
- CN202307493U CN202307493U CN2011203566268U CN201120356626U CN202307493U CN 202307493 U CN202307493 U CN 202307493U CN 2011203566268 U CN2011203566268 U CN 2011203566268U CN 201120356626 U CN201120356626 U CN 201120356626U CN 202307493 U CN202307493 U CN 202307493U
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- current transformer
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Abstract
The utility model discloses an electronic type current transformer, comprising a transformer body, a high-voltage wiring board, a U-shaped primary conductor, a secondary protection winding, a secondary measurement winding and a voltage collector, wherein two ends of the U-shaped primary conductor are respectively and fixedly connected with the outer side of the high-voltage wiring board; the input end of the voltage collector is respectively connected with the secondary protection winding and the secondary measurement winding, and the output end of the voltage collector is connected with an output terminal of the secondary protection winding; and the high-voltage wiring board, the U-shaped primary conductor, the secondary protection winding, the secondary measurement winding and the voltage collector are integrally cast into the transformer body. The electronic type current transformer disclosed by the utility model has the advantages of simple structure, light weight and low cost, and can be directly connected with a microcomputer type relay protection device and an electronic type instrument; and the electronic type current transformer is high in measurement precision, good in linearity and wide in measurement range, overcomes the disadvantages of an electromagnetic type current transformer that the frequency band is narrow, the response is slow and the like, and has a strong anti-electromagnetic interference capability.
Description
Technical field
The utility model relates to a kind of electronic current mutual inductor, and especially a kind of electronic current mutual inductor that is used for digital transformer substation belongs to electrical equipment technical field.
Background technology
Instrument transformer is the equipment that supplies to measure and protect usefulness in the electric power system; Current transformer can change the big electrorheological in electric current in the high-pressure system or the low-pressure system into the little electric current of standard of low pressure; In order to give the power supply of measuring instrument and relay; The high pressure of measuring instrument, protective relaying device and system is separated, protections such as overcurrent, overload are carried out in electric power system and equipment, guarantee the safety of operating personnel and equipment.The needs of building along with the development of digital transformer substation and intelligent grid; Electric power system microcomputer type relay protection and electronic instrument have progressively occupied leading position; In relaying protection and measuring; Because the energy of control section stream and separate from information flow, monitoring equipment no longer needs the instrument transformer of high power output.Traditional electromagnetic current transducer volume is big, Heavy Weight, cost is high, frequency band is narrow, is subject to electromagnetic interference, and its simulation output is difficult to and digitized secondary device direct interface, can not adapt to the digital development trend of transformer station.
Summary of the invention
The purpose of the utility model provide a kind of simple in structure, in light weight, cost is low, anti-electromagnetic interference capability is strong, can be used for the electronic current mutual inductor of digital transformer substation.
The utility model is achieved through following technical scheme:
A kind of electronic current mutual inductor; Comprise current transformer body, be symmetricly set on the current transformer body upside the high-voltage connection plate, be arranged on the U type Primary Conductor of high-voltage connection plate downside, the second protection winding and the secondary that are sleeved on U type Primary Conductor middle part side by side measured winding, be arranged on the voltage acquisition device that second protection winding and secondary are measured the winding below; U type Primary Conductor two ends are connected with the high-voltage connection plate outside respectively; Voltage acquisition device input is measured winding with second protection winding, secondary respectively and is connected, and voltage acquisition device output is connected through the multiple twin shielding conductor with the secondary output respectively; Said high-voltage connection plate, U type Primary Conductor, second protection winding, secondary measure winding and the voltage acquisition device becomes current transformer body with the epoxy resin embedding, and current transformer body is vertically fixed on installs on the base plate.
The purpose of the utility model can also further realize through following technical measures.
Aforesaid electronic current mutual inductor, wherein said second protection winding lead-out terminal is a cable connector.
The utility model is simple in structure, in light weight, cost is low; Be applicable to the digital transformer substation complex automatic system; It is output as the small voltage signal, can be directly and microcomputer based relay protective device and electronic instrument interface, thus realize metering, control, measurement and defencive function.Certainty of measurement is high, good linearity, and measuring range is wide, has overcome shortcomings such as the electromagnetic current transducer frequency band is narrow, low-response, and all holding wires are through the shielding conductor transmission, and anti-electromagnetic interference capability is strong.Can not produce high voltage during second open circuit, fundamentally eliminate the major accident hidden danger in the power system operation, at utmost ensure the safety of personnel and equipment.The second protection winding lead-out terminal of the utility model adopts cable connector, guarantees attachment security, reliable.
Advantage of the utility model and characteristics will illustrate through the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide with reference to accompanying drawing as an example.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the A-A cutaway view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Like Fig. 1, shown in Figure 2; Present embodiment is to be used for that 10kV digital transformer substation complex automatic system comprises current transformer body 7, symmetrically arranged high-voltage connection plate 1, is arranged on the U type Primary Conductor 2 of high-voltage connection plate 1 downside, the second protection winding 3 and the secondary that are sleeved on U type Primary Conductor 2 middle parts side by side measured winding 4, to be arranged on the voltage acquisition device 5 that second protection winding 3 and secondary are measured winding 4 belows; U type Primary Conductor 2 two ends are connected with high-voltage connection plate 1 outside respectively; Second protection winding 3 is measured winding 4 with secondary and is all adopted Rogowski coil principle or the little iron-core coil principles of low energy consumption to form; Voltage acquisition device 5 inputs are measured winding 4 with second protection winding 3, secondary respectively and are connected; Voltage acquisition device 5 outputs are connected with the second protection winding lead-out terminal 6 in its left side respectively; Can the signal of taking from the high-pressure side be transferred to low-pressure side through voltage acquisition device 5; High-voltage connection plate 1, U type Primary Conductor 2, second protection winding 3, secondary measure winding 4 and voltage acquisition device 5 pours into current transformer body 7 through epoxy resin integral, and current transformer body 7 is vertically fixed on installs on the base plate 8, base plate 8 right side central is installed is provided with earth terminal 9; Second protection winding lead-out terminal 6 adopts cable connector 6 to connect, and is safe in utilization, reliable.
The utility model is applicable to 10 kilovolts of digital transformer substation complex automatic systems, and its all signals help strengthening the instrument transformer anti-electromagnetic interference capability through the transmission of multiple twin shielding conductor.
Except that the foregoing description, the utility model can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of the utility model requirement.
Claims (2)
1. electronic current mutual inductor; It is characterized in that: comprise current transformer body, be symmetricly set on the current transformer body upside the high-voltage connection plate, be arranged on the U type Primary Conductor of high-voltage connection plate downside, the second protection winding and the secondary that are sleeved on U type Primary Conductor middle part side by side measured winding, be arranged on the voltage acquisition device that second protection winding and secondary are measured the winding below; U type Primary Conductor two ends are connected with the high-voltage connection plate outside respectively; Voltage acquisition device input is measured winding with second protection winding, secondary respectively and is connected, and voltage acquisition device output is connected through the multiple twin shielding conductor with second protection winding lead-out terminal respectively; Said high-voltage connection plate, U type Primary Conductor, second protection winding, secondary measure winding and the voltage acquisition device becomes current transformer body with the epoxy resin embedding, and current transformer body is vertically fixed on installs on the base plate.
2. electronic current mutual inductor as claimed in claim 1 is characterized in that: said second protection winding lead-out terminal is a cable connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203566268U CN202307493U (en) | 2011-09-22 | 2011-09-22 | Electronic type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203566268U CN202307493U (en) | 2011-09-22 | 2011-09-22 | Electronic type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307493U true CN202307493U (en) | 2012-07-04 |
Family
ID=46376337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203566268U Expired - Fee Related CN202307493U (en) | 2011-09-22 | 2011-09-22 | Electronic type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307493U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749343A (en) * | 2017-10-27 | 2018-03-02 | 江苏泰昌电子有限公司 | A kind of high frequency switch power isolating transformer for carrying current acquisition function |
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
-
2011
- 2011-09-22 CN CN2011203566268U patent/CN202307493U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107749343A (en) * | 2017-10-27 | 2018-03-02 | 江苏泰昌电子有限公司 | A kind of high frequency switch power isolating transformer for carrying current acquisition function |
| CN114167127A (en) * | 2021-11-24 | 2022-03-11 | 镇江市丹高电器有限公司 | Self-powered current transformer |
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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: 20120704 Termination date: 20150922 |
|
| EXPY | Termination of patent right or utility model |