CN201117422Y - Electronic type current mutual inductor for central cabinet - Google Patents
Electronic type current mutual inductor for central cabinet Download PDFInfo
- Publication number
- CN201117422Y CN201117422Y CNU2007200454461U CN200720045446U CN201117422Y CN 201117422 Y CN201117422 Y CN 201117422Y CN U2007200454461 U CNU2007200454461 U CN U2007200454461U CN 200720045446 U CN200720045446 U CN 200720045446U CN 201117422 Y CN201117422 Y CN 201117422Y
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- voltage
- primary
- current transformer
- protection
- winding
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Abstract
An electronic current transformer used for a metalclad withdraw switchgear consists of primary high-voltage outlet terminals, a secondary measuring class winding, a secondary protection class winding, a primary conductor, etc. The secondary measuring class winding goes through the left side of the circular primary conductor, and the secondary protection class winding goes through the right side; the primary high-voltage outlet terminals are respectively arranged above both ends of the primary conductor; epoxy resin mixed glue is arranged on the upper surface of the primary high-voltage outlet terminals, so as to wrap and fill the transformer. The electronic current transformer has not the secondary circuit high-voltage danger of the traditional transformers; has low magnetic flux density, especially in the environment of high voltage and large current; provides possibility for measuring and analyzing the instantaneous fault current and higher harmonic in large-capacity power systems; and has the advantages of small size, light weight, low cost, and easiness in realizing automatic and digital measurement and protection.
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 35KV 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, second protection level winding, primary conductive body, an epoxy resin mixed glue current transformer body; 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 by epoxy resin mixed glue except that high-voltage terminal end upper surface, be wrapped in to dash and filling out current transformer body.The utility model is installed, use, simple, convenient, 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. second protection level winding, 4. primary conductive body, 5. epoxy resin mixed glue, 6. current transformer body.
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 4, second protection level winding 3, an epoxy resin mixed glue 5; it is characterized in that: a secondary measurement level winding 2 is passed on primary conductive body 4 left sides of being arranged to annular; second protection level winding 3 is passed on the right; the top, two ends of primary conductive body 4 respectively is provided with high-voltage terminal end 1 one time; and by epoxy resin mixed glue 5 except that high-voltage terminal end 1 upper surface, be wrapped in to dash and filling out current transformer body 6.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 high-voltage terminal end, a secondary with the primary conductive body then and measure the level winding, at the two ends of primary conductive body the high-voltage terminal end is set respectively one time again, remove a high-voltage terminal end upper surface outer wrapping by epoxy resin mixed glue and towards filling out current transformer body.The utility model output meets the specified secondary output voltage of IEC60044-8:2002 and GB/T208408-2007 " electronic current mutual inductor " standard.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 by a high-voltage terminal end (1); secondary is measured level winding (2); primary conductive body (4); second protection level winding (3); epoxy resin mixed glue (5) is formed; it is characterized in that: a secondary measurement level winding (2) is passed on primary conductive body (4) left side of being arranged to annular; second protection level winding (3) is passed on the right; the top, two ends of primary conductive body (4) respectively is provided with a high-voltage terminal end (1); and by epoxy resin mixed glue (5) except that a high-voltage terminal end (1) upper surface, be wrapped in to dash and filling out current transformer body (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200454461U CN201117422Y (en) | 2007-08-22 | 2007-08-22 | Electronic type current mutual inductor for central cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200454461U CN201117422Y (en) | 2007-08-22 | 2007-08-22 | Electronic type current mutual inductor for central cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201117422Y true CN201117422Y (en) | 2008-09-17 |
Family
ID=39992000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200454461U Expired - Lifetime CN201117422Y (en) | 2007-08-22 | 2007-08-22 | Electronic type current mutual inductor for central cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201117422Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819869A (en) * | 2010-04-19 | 2010-09-01 | 熊江咏 | Electronic current transformer |
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
-
2007
- 2007-08-22 CN CNU2007200454461U patent/CN201117422Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819869A (en) * | 2010-04-19 | 2010-09-01 | 熊江咏 | Electronic current transformer |
| CN102360891A (en) * | 2011-10-25 | 2012-02-22 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
| CN102360891B (en) * | 2011-10-25 | 2013-05-08 | 保定天威集团有限公司 | Multi-transformation ratio current transformer |
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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.: 2008320001119 Denomination of utility model: Electronic type current mutual inductor for central cabinet Granted publication date: 20080917 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: 20160822 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080917 |