CN2862049Y - Novel electronic current sensor - Google Patents
Novel electronic current sensor Download PDFInfo
- Publication number
- CN2862049Y CN2862049Y CN 200520036071 CN200520036071U CN2862049Y CN 2862049 Y CN2862049 Y CN 2862049Y CN 200520036071 CN200520036071 CN 200520036071 CN 200520036071 U CN200520036071 U CN 200520036071U CN 2862049 Y CN2862049 Y CN 2862049Y
- Authority
- CN
- China
- Prior art keywords
- secondary winding
- current
- insulation layer
- current sensor
- protection box
- 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 - Lifetime
Links
- 238000004804 winding Methods 0.000 claims abstract description 16
- 239000004593 Epoxy Substances 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000000956 alloy Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides a novel electronic type current sensor, including setting up the alloy core in the protection box, be located the outer secondary winding of protection box, connect in parallel in the divider resistor at secondary winding both ends, be located the outer shield cover of secondary winding, be located the outer epoxy insulation layer of shield cover to and set up the socket on epoxy insulation layer. The requirements of measurement and protection of the power system can be met simultaneously; the measurement range is wide, the linearity is good, the precision can pass through the accurate level of 0.2S, and no saturation exists; the operation is reliable, and the secondary circuit can not generate high voltage under the condition of open circuit to form potential safety hazard; and has small volume and light weight. The method is mainly used for measuring the current in the power grid and protecting the relay.
Description
Technical field
The utility model relates to current measurement and the relay protection element in a kind of electric system, particularly relates to a kind of new-style electronic current sensor.
Background technology
In electric system, conventional electromagnetic current transducer is mostly adopted in the measurement of electric current and relay protection, and conventional electromagnetic transformer adopts two Secondary Winding to finish current measurement and relay protection respectively.Complex structure, volume is big, and frequency band is narrow, secondary singal wave form distortion when magnetic saturation takes place, measuring error is big, easily causes the protective relaying device misoperation.Simultaneously, along with little be treated to the basis the widespread use of new technology in electric system, make conventional secondary output no longer need the current signal of 1 peace or 5 peaces, but tens of millivolts are to the voltage signal of several volts, therefore, Chang Gui electromagnetic current transducer is difficult to satisfy the technical requirement of electric system.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming; the danger that a kind of measurement range is wide, precision is high, the linearity is good, antijamming capability is strong, no second open circuit produces high pressure is provided, can satisfies simultaneously and measure and protection requirement and little, the lightweight new-style electronic current sensor of volume.
The utility model new-style electronic current sensor comprises the alloy-iron core that is arranged in the protection box; be positioned at an outer Secondary Winding of protection box; be connected to the voltage grading resistor at Secondary Winding two ends; be positioned at the outer radome of Secondary Winding; be positioned at the outer epoxy insulation layer of radome, and be arranged on the socket on the epoxy insulation layer.Wherein, alloy-iron core adopts the microcrystallizing alloy material of high initial magnetic permeability, low-loss, high linearity.The protection box is guaranteed to close alloy-iron core and not influenced by external force, remains superperformance.Radome guarantees that for low permeability magnetic material sensor is not subjected to the interference of external electromagnetic field in electrical network, can export high-fidelity, high-precision signal all the time.Voltage grading resistor is formed by the noninductive coiling of precision resister material, makes secondary current obtain pressure drop thereon, thereby externally exports by socket and double layer screen output cable.The epoxy insulation layer plays protection simultaneously and supports.
The principle of work of the utility model new-style electronic current sensor is; current carrying bus passes current sensor; one time high-voltage great-current generates an electromagnetic field; in Secondary Winding, induce secondary current by alloy-iron core; secondary current and a high-voltage great-current keep linear relationship well; secondary current is at secondary current; secondary current and a high-voltage great-current keep good linear relationship; secondary current obtains pressure drop on voltage grading resistor; voltage signal after the conversion is delivered to the signal acquisition process unit through the double layer screen cable, in order to current measurement and enforcement microcomputer protective relay.
The advantage of the utility model new-style electronic current sensor is, one only needs a Secondary Winding just can satisfy electric system metering and protection requirement simultaneously, and volume is little, in light weight; Its two, measurement range reaches 50A～5000A, the linearity is good, precision reaches the 0.2S class of accuracy, can cover whole current classes of electrical network once, two kinds of specification current sensors, can be used as standard component production and use; Its three, reliable, secondary circuit can not produce high pressure and form potential safety hazard under open circuit situation; Its four, secondary output low-power is a voltage signal, can be directly and the microcomputer measurement protective device link, thereby simplified the structure of microcomputer measurement protective device, the reduction system cost.Be used for the measurement and the relay protection of electric system electric current.
Description of drawings
Fig. 1: the utility model structural representation
Fig. 2: fundamental diagram of the present utility model
Embodiment
The utility model new-style electronic current sensor comprises the alloy-iron core 4 that is arranged in the protection box 5; be positioned at a Secondary Winding 3 outside the protection box 5; be connected to the voltage grading resistor 6 at Secondary Winding 3 two ends; be positioned at the radome 2 of secondary outside 3 groups; be positioned at the epoxy insulation layer 1 outside the radome 2, and be arranged on the socket 7 on the epoxy insulation layer 1.Among Fig. 2, N
1Be current carrying bus, I
1For carrying bus N
1On electric current, N
2Be Secondary Winding, I
2Be Secondary Winding N
2On electric current, Rsb is a voltage grading resistor, U
2Be voltage grading resistor U
2The pressure drop of last acquisition.
Claims (1)
1, a kind of new-style electronic current sensor; comprise the alloy-iron core that is arranged in the protection box; be positioned at the outer Secondary Winding of protection box; be positioned at secondary and scratch the outer epoxy insulation layer of group; be arranged on the socket on the epoxy insulation layer; it is characterized in that Secondary Winding is a Secondary Winding, and be provided with radome between Secondary Winding and the epoxy insulation layer, the two ends of Secondary Winding are parallel with voltage grading resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520036071 CN2862049Y (en) | 2005-11-11 | 2005-11-11 | Novel electronic current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520036071 CN2862049Y (en) | 2005-11-11 | 2005-11-11 | Novel electronic current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862049Y true CN2862049Y (en) | 2007-01-24 |
Family
ID=37659680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520036071 Expired - Lifetime CN2862049Y (en) | 2005-11-11 | 2005-11-11 | Novel electronic current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2862049Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123372A (en) * | 2011-11-21 | 2013-05-29 | 上海晨兴希姆通电子科技有限公司 | Signal acquisition unit and current detection device |
| CN105024371A (en) * | 2015-07-22 | 2015-11-04 | 江苏靖江互感器厂有限公司 | Four-in-one intelligent sampling discharging device |
| CN108376934A (en) * | 2018-02-09 | 2018-08-07 | 上海启腾电气股份有限公司 | A kind of integrated bushing |
-
2005
- 2005-11-11 CN CN 200520036071 patent/CN2862049Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123372A (en) * | 2011-11-21 | 2013-05-29 | 上海晨兴希姆通电子科技有限公司 | Signal acquisition unit and current detection device |
| CN105024371A (en) * | 2015-07-22 | 2015-11-04 | 江苏靖江互感器厂有限公司 | Four-in-one intelligent sampling discharging device |
| CN108376934A (en) * | 2018-02-09 | 2018-08-07 | 上海启腾电气股份有限公司 | A kind of integrated bushing |
| CN108376934B (en) * | 2018-02-09 | 2020-04-21 | 上海启腾电气股份有限公司 | Integrated high-voltage bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610039 western suburbs of Sichuan City, Chengdu Province Co-patentee after: SEAC Group Co., Ltd. Patentee after: Xihua University Address before: 610039 western suburbs of Sichuan City, Chengdu Province Co-patentee before: Sichuan Electrical Equipment Co., Ltd. Patentee before: Xihua University |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070124 |
|
| EXPY | Termination of patent right or utility model |