CN102360891B - Multi-transformation ratio current transformer - Google Patents
Multi-transformation ratio current transformer Download PDFInfo
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- CN102360891B CN102360891B CN 201110325855 CN201110325855A CN102360891B CN 102360891 B CN102360891 B CN 102360891B CN 201110325855 CN201110325855 CN 201110325855 CN 201110325855 A CN201110325855 A CN 201110325855A CN 102360891 B CN102360891 B CN 102360891B
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- secondary winding
- level secondary
- winding
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Abstract
The invention relates to a multi-transformation ratio current transformer, belonging to the technical field of a transformer. The technical scheme provided by the invention is as follows: the multi-transformation ratio current transformer comprises an expander (5), a device body (6), an insulator (7) and a base (8); the expander is arranged above the device body; the insulator is arranged outside the device body; the insulator is arranged above the base; a primary winding (1), a protection-level secondary winding (2), a metering-level secondary winding (3) and a measurement-level secondary winding (4) are arranged inside the device body; and the protection-level secondary winding, the metering-level secondary winding and the measurement-level secondary winding are fixed outside the primary winding. The multi-transformation ratio current transformer provided by the invention has advantages that: the precisions of the measurement-level secondary winding and the metering-level secondary winding are improved, so that the accuracy requirements of the multi-transformation ratio current transformer are met; meanwhile, as an outer limit size of the protection-level secondary winding is reduced, the multi-transformation ratio current transformer can be normally assembled and the special requirements of users are met on the basis of no increase of the production cost are met.
Description
Technical field
The present invention relates to a kind of variable specific current transformer, belong to the instrument transformer technical field.
Background technology
At present; some user has proposed specific (special) requirements to current transformer; requirement is measured and the little current ratio of metering level secondary winding employing in same current transformer, and the protected level secondary winding adopts large current ratio simultaneously; current ratio difference reaches more than 6 times; even reach 20 times, because current ratio difference is excessive, background technology is not to measure and measure a level secondary winding error can not satisfy; be exactly that the protected level secondary winding wire number of plies is too many, can not hold in the device body.
Summary of the invention
The purpose of this invention is to provide a kind of variable specific current transformer; improved the precision of measuring and measuring the level secondary winding; can satisfy accuracy requirement; reduced simultaneously the outer limit size of protected level secondary winding; can normally assemble; satisfy user's specific (special) requirements on the basis that does not increase product cost, solved the problems referred to above that background technology exists.
Technical scheme of the present invention is: a kind of variable specific current transformer, comprise expander, device body, insulator, base, it is square with it that expander is arranged on device, insulator is arranged on outside the device body, insulator is arranged on above base, winding, protected level secondary winding, a metering level secondary winding is set in the device body and measures the level secondary winding; One time winding adopts flat type copper wire or aluminum steel coiling, improve a specified ampere-turn, increase the number of turn of secondary winding, little current ratio secondary winding is selected thicker wire, make the error of little current ratio secondary winding easily meet the demands, a corresponding raising of ampere-turn of large current ratio secondary winding does not reach the rated primary current of large current ratio secondary winding due to actual current, the wire of large current ratio secondary winding can be selected than thin wire, the economical with materials cost.
Good effect of the present invention: improved the precision of measuring and measuring the level secondary winding; can satisfy accuracy requirement; reduced simultaneously the outer limit size of protected level secondary winding, can normally assemble, satisfied user's specific (special) requirements on the basis that does not increase product cost.
Description of drawings
Fig. 1 is the embodiments of the invention schematic appearance;
Fig. 2 is the embodiments of the invention schematic diagrames;
In figure: winding 1, protected level secondary winding 2, metering level secondary winding 3 and measure a level secondary winding 4, expander 5, device body 6, insulator 7, base 8.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described by embodiment.
a kind of variable specific current transformer, comprise expander 5, device body 6, insulator 7, base 8, it is square with it that expander is arranged on device, insulator is arranged on outside the device body, insulator is arranged on above base, winding 1 is set in the device body one time, protected level secondary winding 2, metering level secondary winding 3 and a measurement level secondary winding 4, one time winding adopts flat type copper wire or aluminum steel coiling, one time the number of turn is brought up to 12 circles, the protected level secondary winding, metering level secondary winding and measure a level secondary winding and be fixed on the winding outside one time, measuring and measure the specified number of ampere turns of level secondary winding is 360 ampere-turns, wire adopt φ 1.8 and φ 1.0 the wire double joint and around, the specified number of ampere turns of protected level secondary winding is 7200 ampere-turns, wire with a φ 1.12 is wound around.
In embodiment; customer requirements 110kV current transformer protected level secondary winding rated transformation ratio is 2 * 600/5A; class of accuracy is 10P30; measuring level secondary winding rated transformation ratio is 2 * 30/5A; class of accuracy is 0.5SFS5; metering level secondary winding rated transformation ratio is 2 * 30/5A, and class of accuracy is 0.2SFS5.winding conductor of the present invention is selected the paper bag flat type copper wire, a number of turn of product is brought up to 12 circles, the specified number of ampere turns of measuring level secondary winding and metering level secondary winding is 360 ampere-turns, wire adopt φ 1.8 and φ 1.0 the wire double joint and around, so just than the requirement that is easier to satisfy class of accuracy, the specified number of ampere turns of protected level secondary winding is 7200 ampere-turns simultaneously, because the product actual current is no more than 60A, so the wire of protected level secondary winding can attenuate, just can satisfy the requirement of temperature rise and dynamic and thermal stability electric current with the wire of a φ 1.12, outer limit size also reduces much, can not affect Product Assembly, satisfied user's specific (special) requirements.
Claims (1)
1. variable specific current transformer, it is characterized in that comprising expander (5), device body (6), insulator (7), base (8), it is square with it that expander is arranged on device, insulator is arranged on outside the device body, insulator is arranged on above base, a winding (1) is set in the device body, protected level secondary winding (2), metering level secondary winding (3) and a measurement level secondary winding (4), one time winding adopts flat type copper wire or aluminum steel coiling, improve a specified ampere-turn, increase the number of turn of secondary winding, little current ratio secondary winding is selected thicker wire, make the error of little current ratio secondary winding easily meet the demands, a corresponding raising of ampere-turn of large current ratio secondary winding, do not reach the rated primary current of large current ratio secondary winding due to actual current, the wire of large current ratio secondary winding can be selected than thin wire through calculating, the economical with materials cost, the number of turn of a winding is brought up to 12 circles, protected level secondary winding, metering level secondary winding and measure a level secondary winding and be fixed on the winding outside one time, measuring and measure the specified number of ampere turns of level secondary winding is 360 ampere-turns, wire adopt φ 1.8 and φ 1.0 the wire double joint and around, the specified number of ampere turns of protected level secondary winding is 7200 ampere-turns, with the wire winding of a φ 1.12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110325855 CN102360891B (en) | 2011-10-25 | 2011-10-25 | Multi-transformation ratio current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110325855 CN102360891B (en) | 2011-10-25 | 2011-10-25 | Multi-transformation ratio current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102360891A CN102360891A (en) | 2012-02-22 |
| CN102360891B true CN102360891B (en) | 2013-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110325855 Expired - Fee Related CN102360891B (en) | 2011-10-25 | 2011-10-25 | Multi-transformation ratio current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102360891B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187160B (en) * | 2013-04-18 | 2016-06-08 | 南京智达电气有限公司 | Combination enwinding type current transformer and preparation method thereof |
| CN104143421B (en) * | 2014-08-12 | 2016-09-28 | 湖南大北互互感器有限公司 | Outdoor totally-enclosed compound inslation support type current transformer |
| CN106033882B (en) * | 2015-03-18 | 2018-10-02 | 中国电力工程顾问集团华北电力设计院有限公司 | Novel microcomputer complex protection device |
| CN108666118A (en) * | 2018-03-23 | 2018-10-16 | 中国电力科学研究院有限公司 | A kind of Multiple coil current transformer of same magnetic circuit and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2284443Y (en) * | 1996-12-30 | 1998-06-17 | 赵学农 | Current transformer |
| CN201117422Y (en) * | 2007-08-22 | 2008-09-17 | 熊江咏 | Electronic type current mutual inductor for central cabinet |
| CN201340796Y (en) * | 2009-02-02 | 2009-11-04 | 保定天威集团有限公司 | Measuring current transformer |
| CN102064014A (en) * | 2010-12-06 | 2011-05-18 | 保定天威集团有限公司 | Multi-turn inverted current transformer |
-
2011
- 2011-10-25 CN CN 201110325855 patent/CN102360891B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2284443Y (en) * | 1996-12-30 | 1998-06-17 | 赵学农 | Current transformer |
| CN201117422Y (en) * | 2007-08-22 | 2008-09-17 | 熊江咏 | Electronic type current mutual inductor for central cabinet |
| CN201340796Y (en) * | 2009-02-02 | 2009-11-04 | 保定天威集团有限公司 | Measuring current transformer |
| CN102064014A (en) * | 2010-12-06 | 2011-05-18 | 保定天威集团有限公司 | Multi-turn inverted current transformer |
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| CN102360891A (en) | 2012-02-22 |
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