CN201084540Y - An electronic current transformer applicable to a mid-positioned cabinet - Google Patents
An electronic current transformer applicable to a mid-positioned cabinet Download PDFInfo
- Publication number
- CN201084540Y CN201084540Y CNU2007200455708U CN200720045570U CN201084540Y CN 201084540 Y CN201084540 Y CN 201084540Y CN U2007200455708 U CNU2007200455708 U CN U2007200455708U CN 200720045570 U CN200720045570 U CN 200720045570U CN 201084540 Y CN201084540 Y CN 201084540Y
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Abstract
The utility model relates to an electronic current transducer for a metal-clad withdraw switchgear, comprising a primary high voltage terminal, a secondary measurement winding, a primary conductor and a secondary protection winding, wherein, the primary conductor is arranged as a ring, the secondary measurement winding through the left side of the primary and the secondary protection winding through the right side, the primary high voltage terminal is arranged above two ends of the primary conductor, the epoxy resin enwraps all the elements except the upper surface of the primary conductor to form the transducer. The utility model avoids the narrow frequency band and the slow response in the traditional electromagnet current transducer, eliminates the flammability and explosion cause by the oil storage is the prior art, and has practical significance in the reform and improvement of the prior middle and low voltage electrical equipment. The utility model has the advantages of convenient installation and use, no maintenance in operation, light weight, high precision, good linearity, wide measurement range, high safety, low cost and quick result.
Description
Technical field: the utility model relates to a kind of Middle-Placed Switch Cabinet with electronical current transformer; it is applicable to the mid-cabinet of 10KV in the digital transformer substation complex automatic system; its output is the small voltage signal; can be directly and instrument, protective relaying device interface, thus realize metering, control, measure, the function of protection.
Technical background: along with the develop rapidly of electronic technology; microcomputer type relay protection and electronic electricity meter have progressively occupied leading position; in relaying protection and measuring, the energy stream and the separate from information flow of control section, thereby monitoring equipment no longer needs the instrument transformer of high power output.While, existing instrument transformer can not direct supporting use owing to the application of fast development, the integrated automation of transformation stations and the power distribution automation of power industry.Therefore it is extremely urgent to develop a kind of low energy consumption New type of current instrument transformer with measurement, protection and ability to communicate.
Summary of the invention: the purpose of this utility model will provide a kind of Middle-Placed Switch Cabinet with electronical current transformer exactly, and it can solve the direct matching used problem of digital transformer substation complex automatic system intermediate switchgear cabinet well.The purpose of this utility model is to realize like this; Middle-Placed Switch Cabinet with electronical current transformer is made up of high-voltage terminal end, a secondary measurement level winding, primary conductive body, second protection level winding, an epoxy resin mixed glue; it is characterized in that: a secondary measurement level winding is passed on the primary conductive body left side of being arranged to annular; second protection level winding is passed on the right; the top at primary conductive body two ends respectively is provided with the high-voltage terminal end one time, and removes a high-voltage terminal end upper surface outer wrapping by epoxy resin mixed glue and and pour into instrument transformer.The utility model is easy to install, and operation does not need to safeguard.In light weight, precision is high, good linearity, measuring range are wide, shortcoming such as the frequency band that has overcome traditional electromagnetic current transducer is narrow, low-response.Can not produce high voltage during the Current Transformer Secondary open circuit, fundamentally eliminate the significant trouble hidden danger in the power system operation, farthest ensure the safety of personnel and equipment.Safe, the not danger such as inflammable, explosive that produces because of trapped fuel.Cost is low, instant effect, in existing, the transformation and the raising of low voltage electrical equipment have realistic meaning.All signals transmit by the multiple twin shielding conductor, help strengthening the ability of anti-electromagnetic interference.
Description of drawings: Fig. 1 is the utility model structural representation;
High-voltage terminal end, 2. secondary is measured a level winding, 3. primary conductive body, 4. second protection level winding, 5. epoxy resin mixed glue.
Embodiment: the utility model is described in further detail below in conjunction with accompanying drawing;
In the drawings; the utility model Middle-Placed Switch Cabinet with electronical current transformer is made up of high-voltage terminal end 1, a secondary measurement level winding 2, primary conductive body 3, second protection level winding 4, an epoxy resin mixed glue 5; it is characterized in that: a secondary measurement level winding 2 is passed on primary conductive body 3 left sides of being arranged to annular; second protection level winding 4 is passed on the right; top, the two ends of primary conductive body 3 respectively is provided with high-voltage terminal end 1 one time, and removes high-voltage terminal end 1 a upper surface outer wrapping by epoxy resin mixed glue 5 and and pour into instrument transformer.During concrete enforcement, secondary is measured the level winding and is adopted the little ironcore choke of low energy consumption to be made, and promptly with above the little iron core of winding the minimum secondary winding of loss being set, connects integrated component resistance on secondary winding, and therefore, its secondary is output as voltage signal.Secondary current produces voltage drop on integrated component resistance, its amplitude is proportional to primary current and same-phase.And the internal loss of instrument transformer and the secondary power of burden requirement are more little, and its measuring range is wide more, accuracy is high more.Second protection level winding adopts Rogowski coil principle to be made, be with lead equably on the non-ferromagnetic annular skeleton, one time bus places coil central authorities, so the current potential between winding coil and the bus is isolated.So owing to do not exist iron core not have saturated phenomenon.After handling through integrator, the induced potential that the coil two ends produce obtains and the proportional analog quantity output of bus current.Second protection level winding also can adopt the little ironcore choke of low energy consumption to be made.Pass secondary with the primary conductive body then and measure level winding, second protection level winding, at the two ends of primary conductive body the high-voltage terminal end is set respectively one time again, except that a high-voltage terminal end upper surface outer wrapping by epoxy resin mixed glue and pour into instrument transformer.The utility model can be directly and instrument, protective relaying device interface, with connect under the intermediate switchgear cabinet supporting.Thereby realize the function of metering, control, measurement, protection.
Claims (1)
1. Middle-Placed Switch Cabinet with electronical current transformer is made up of a high-voltage terminal end (1), a secondary measurement level winding (2), primary conductive body (3), second protection level winding (4), epoxy resin mixed glue (5); it is characterized in that: a secondary measurement level winding (2) is passed on primary conductive body (3) left side of being arranged to annular; second protection level winding (4) is passed on the right; top, the two ends of primary conductive body (3) respectively is provided with a high-voltage terminal end (1), and removes a high-voltage terminal end (1) upper surface outer wrapping by epoxy resin mixed glue (5) and and pour into instrument transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200455708U CN201084540Y (en) | 2007-08-28 | 2007-08-28 | An electronic current transformer applicable to a mid-positioned cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200455708U CN201084540Y (en) | 2007-08-28 | 2007-08-28 | An electronic current transformer applicable to a mid-positioned cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201084540Y true CN201084540Y (en) | 2008-07-09 |
Family
ID=39627012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200455708U Expired - Lifetime CN201084540Y (en) | 2007-08-28 | 2007-08-28 | An electronic current transformer applicable to a mid-positioned cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201084540Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867637A (en) * | 2012-09-17 | 2013-01-09 | 熊江咏 | Electronic voltage transformer matched with high-voltage GIS |
-
2007
- 2007-08-28 CN CNU2007200455708U patent/CN201084540Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102867637A (en) * | 2012-09-17 | 2013-01-09 | 熊江咏 | Electronic voltage transformer matched with high-voltage GIS |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangsu Jingjiang Instrument Transformer Factory Co., Ltd. Assignor: Xiong Jiangyong Contract fulfillment period: 2008.11.10 to 2016.11.30 Contract record no.: 2008320001122 Denomination of utility model: Electronic type current mutual inductor for central cabinet Granted publication date: 20080709 License type: Exclusive license Record date: 20081208 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.10 TO 2016.11.30; CHANGE OF CONTRACT Name of requester: JIANGSU JINGJIANG MUTUAL INDUCTOR CO., LTD., FACTO Effective date: 20081208 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160831 Address after: 214500 No. 23, Ping Road, west of Jiangsu, Jingjiang, Zhenjiang Patentee after: Jingjiang Jiangsu mutual inductor Limited by Share Ltd Address before: 214500 No. 23, Ping Road, west of Jiangsu, Jingjiang, Zhenjiang Patentee before: Xiong Jiangyong |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080709 |
|
| CX01 | Expiry of patent term |