CN201167025Y - Electronic voltage transformer base on partial pressure resistance - Google Patents
Electronic voltage transformer base on partial pressure resistance Download PDFInfo
- Publication number
- CN201167025Y CN201167025Y CNU2008200837529U CN200820083752U CN201167025Y CN 201167025 Y CN201167025 Y CN 201167025Y CN U2008200837529 U CNU2008200837529 U CN U2008200837529U CN 200820083752 U CN200820083752 U CN 200820083752U CN 201167025 Y CN201167025 Y CN 201167025Y
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- voltage transformer
- voltage
- partial pressure
- low
- resistor
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses an electronic voltage transformer based on a resistor divider. The structure of the voltage transformer consists of the resistor divider, a transmission system and a signal processing unit. The key points of the voltage transformer are as follows: the resistor divider consists of a high-voltage side resistor, a low-voltage side resistor and a gas discharge tube of over-voltage protection; the lower end of the low-voltage side resistor is connected with a ground insert with threads, thereby achieving reliable grounding through the ground insert. The electronic voltage transformer has the advantages of mature technology of sensor parts, simple structure, high measuring precision, small volume and light weight.
Description
Technical field
The utility model is about electronic type voltage transformer, and more particularly, the utility model is about the electronic type voltage transformer based on electric resistance partial pressure.
Background technology
Voltage transformer is one of visual plant that is used in the electric power system electric energy metrical and relaying protection, and its accuracy of measurement and reliability are to safe, the stable and economical operation important influence of electric power system.At present, main electromagnetic potential transformer PT of employing and capacitive divided voltage instrument transformer CVT realize that they have accuracy of measurement height in the range of linearity, advantages such as manufacturing process maturation, method of calibration standard to voltage measurement in the electric power system.But be subjected to the restriction of sensor mechanism, traditional voltage transformer has that volume is big, dynamic range is little, ferro resonance takes place easily causes shortcomings such as overvoltage and output short circuit.On the other hand, along with the fast development of microcomputer protective relay technology and modern microelectric technique, relaying protection and secondary are measured no longer needs high-power driving, the 100V of traditional voltage transformer secondary output or
Voltage signal can not directly link to each other with microcomputer, is difficult to adapt to Automation of Electric Systems, digitlization and intelligentized development trend.
The utility model content
Technical problem to be solved in the utility model is the shortcoming that overcomes prior art, and a kind of transducing part technology maturation is provided, and is simple in structure, has accuracy of measurement height, little, the lightweight electronic type voltage transformer based on electric resistance partial pressure of volume.
In order to solve the technical problem of above-mentioned existence, the utility model adopts following technical proposals: instrument transformer is made up of resitstance voltage divider, transmission system and signal processing unit.Its main points are, resitstance voltage divider is made of the gas discharge tube of high-pressure side resistance, low-pressure side resistance and overvoltage protection, and the lower end of low-pressure side resistance is connected with threaded ground connection inserts, thereby realize reliable ground by the ground connection inserts.
The checkout equipment of the utility model display has following beneficial effect compared with prior art: the electronic type voltage transformer based on electric resistance partial pressure has the transducing part technology maturation, and is simple in structure, has accuracy of measurement height, little, the lightweight advantage of volume.
Description of drawings
Accompanying drawing is the utility model electrical block diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is made a detailed explanation.
Referring to accompanying drawing: instrument transformer is made up of resitstance voltage divider A, transmission system B and signal processing unit C.Its main points are, resitstance voltage divider A is made of the gas discharge tube 3 of high-pressure side resistance 1, low-pressure side resistance 2 and overvoltage protection, and the lower end of low-pressure side resistance 2 is connected with threaded ground connection inserts, thereby realize reliable ground by the ground connection inserts.Resitstance voltage divider A mainly exports the proportional small voltage signal that is converted to of busbar voltage as sensor head; Transmission unit B mainly is delivered to signal processing unit C with the voltage divider output signal, realizes the outside electromagnetic interference function of shielding simultaneously; Signal processing unit C mainly is made up of voltage follow, phase compensation and ratio regulating circuit, realizes impedance conversion, phase compensation and the amplitude regulatory function of voltage transformer, makes the instrument transformer output signal accurate, errorless.
Claims (2)
1. electronic type voltage transformer based on electric resistance partial pressure, its structure is made up of transmission system (B) and signal processing unit (C), it is characterized in that transmission system (B) front end also is provided with resitstance voltage divider (A).
2. a kind of electronic type voltage transformer according to claim 1 based on electric resistance partial pressure; it is characterized in that: described resitstance voltage divider (A) is made of the gas discharge tube (3) of high-pressure side resistance (1), low-pressure side resistance (2) and overvoltage protection, and the lower end of low-pressure side resistance (2) is connected with threaded ground connection inserts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200837529U CN201167025Y (en) | 2008-03-03 | 2008-03-03 | Electronic voltage transformer base on partial pressure resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200837529U CN201167025Y (en) | 2008-03-03 | 2008-03-03 | Electronic voltage transformer base on partial pressure resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201167025Y true CN201167025Y (en) | 2008-12-17 |
Family
ID=40192416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200837529U Expired - Fee Related CN201167025Y (en) | 2008-03-03 | 2008-03-03 | Electronic voltage transformer base on partial pressure resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201167025Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435814A (en) * | 2011-09-30 | 2012-05-02 | 中国电力科学研究院 | Device for measuring arc voltage of direct current circuit breaker |
| CN103217564A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Voltage sensor and implementing method thereof based on alloy resistor |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
-
2008
- 2008-03-03 CN CNU2008200837529U patent/CN201167025Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435814A (en) * | 2011-09-30 | 2012-05-02 | 中国电力科学研究院 | Device for measuring arc voltage of direct current circuit breaker |
| CN103217564A (en) * | 2013-03-28 | 2013-07-24 | 国家电网公司 | Voltage sensor and implementing method thereof based on alloy resistor |
| CN103217564B (en) * | 2013-03-28 | 2016-08-31 | 国家电网公司 | A kind of voltage sensor based on resistance alloys and its implementation |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHANG JING ELECTRIC GROUP CO., LTD. Free format text: FORMER OWNER: XIE JUN Effective date: 20090717 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090717 Address after: Toad River Industrial Zone, Yueqing, Zhejiang, Liushi 325604, China Patentee after: CHKO Electric Co., Ltd. Address before: A203, 134, ring road, Jiangbei District, Jiangbei District, Zhejiang, Ningbo, China: 315020 Patentee before: Xie Jun |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20140303 |