CN102360885A - Combined current transformer - Google Patents
Combined current transformer Download PDFInfo
- Publication number
- CN102360885A CN102360885A CN2011101975382A CN201110197538A CN102360885A CN 102360885 A CN102360885 A CN 102360885A CN 2011101975382 A CN2011101975382 A CN 2011101975382A CN 201110197538 A CN201110197538 A CN 201110197538A CN 102360885 A CN102360885 A CN 102360885A
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- winding
- current transformer
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- compensation
- coil
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Abstract
The invention relates to a combined current transformer. The combined current transformer is mainly applied to bushing current transformers of a high-voltage transformer and a high-voltage combined electrical apparatus and can also be applied to an independent current transformer product. The combined current transformer comprises a primary winding, wherein the primary winding passes through a primary coil and an auxiliary coil at the same time; a secondary winding and an auxiliary winding are wound on an iron core of the primary coil; a secondary auxiliary winding is wound on an iron core of the auxiliary coil; the auxiliary winding and the secondary auxiliary winding are connected in parallel; the secondary winding leads out a secondary load; one or two auxiliary windings are available; and the auxiliary coil is subjected to magnetic shunt compensation, capacitance compensation, short circuit turn compensation, turns compensation or combination thereof according to requirements. The invention aims to provide the current transformer capable of replacing the traditional current transformer. The current transformer solves the problems of low precision and low load-bearing capacity of a small-change current transformer.
Description
Technical field
The present invention relates to the current transformer technical field, especially a kind of composite type power pack is used for the violent or little electric current AC electric power systems of load variations and makes current measurement, metering usefulness.
Background technology
Current transformer requires sensor accuracy very high as the senser element of electric current metering and relaying protection in the electric power system, measures the level coil and generally requires to use 0.2 grade even higher, and protected level generally requires 5P20 level even higher.Have in the practical application under a lot of situation, the very little or system loading of rated current changes violent, and at system loading hour, actual current is also very little, sometimes actual current 100A even littler only.Under this little current conditions, accomplish very difficulty of above-mentioned precision, particularly be applied to the current transformer in high-tension transformer, combined electrical apparatus and the high-low pressure circuit breaker, do not reach above-mentioned precision at all.Even if take conventional indemnifying measure, also only can accomplish 0.5 grade, and the load-bearing capacity of current transformer be very low, only can reach 5～10VA, has a strong impact on the serviceability of High-Voltage Electrical Appliances.
Summary of the invention
The objective of the invention is provides a kind of combined electrical alternating-current converter for overcoming above-mentioned technical disadvantages, is mainly used in the casing current transformer of high-tension transformer and high pressure combined electrical apparatus, also can be used for free-standing current transformer product.
The technical scheme that technical solution problem of the present invention adopts is: the composite type power pack; Comprise winding one time; A said winding passes main coil and ancillary coil simultaneously, coiling secondary winding and auxiliary winding on said main coil iron core, coiling time auxiliary winding on the ancillary coil iron core; Said auxiliary winding and time auxiliary winding parallel connection, said secondary winding is drawn secondary load.
Said auxiliary winding group number is selected 1～2 group.
Said ancillary coil is selected magnetic shunt compensation, capacitance compensation, short circuited turn compensation, turn compensation or its combination as required.
The beneficial effect that the present invention had is:
The invention provides a kind of power pack and replace traditional current transformer, it is low to solve little variable-current instrument transformer precision, the problem of load-bearing capacity difference, and the present invention is simple in structure, and is cheap for manufacturing cost.
Description of drawings
Accompanying drawing is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done following detailed description.
As shown in the figure; The present invention includes winding 4 one time; A said winding 4 passes main coil and ancillary coil simultaneously, coiling secondary winding 2 and auxiliary winding 3 on said main coil unshakable in one's determination 1, coiling time auxiliary winding 6 on ancillary coil unshakable in one's determination 5; Said auxiliary winding 3 and time auxiliary winding 6 parallel connections; Said secondary winding 2 is drawn secondary load, and 3 groups of numbers of said auxiliary winding are selected 1～2 group, and said ancillary coil is selected magnetic shunt compensation, capacitance compensation, short circuited turn compensation, turn compensation or its combination as required.Adopt this structure, and in main coil and ancillary coil, adopt the suitable compensation measure, in actual production, the instrument transformer of 100/5A is brought up to 0.2 grade at the identical situation decline class of accuracy of specified output by 1 grade, obtained good effect.
Claims (3)
1. composite type power pack; It is characterized in that: comprise winding one time; A said winding passes main coil and ancillary coil simultaneously, coiling secondary winding and auxiliary winding on said main coil iron core, coiling time auxiliary winding on the ancillary coil iron core; Said auxiliary winding and time auxiliary winding parallel connection, said secondary winding is drawn secondary load.
2. composite type power pack according to claim 1 is characterized in that: said auxiliary winding group number is selected 1～2 group.
3. composite type power pack according to claim 1 is characterized in that: said ancillary coil is selected magnetic shunt compensation, capacitance compensation, short circuited turn compensation, turn compensation or its combination as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101975382A CN102360885A (en) | 2011-07-07 | 2011-07-07 | Combined current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101975382A CN102360885A (en) | 2011-07-07 | 2011-07-07 | Combined current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102360885A true CN102360885A (en) | 2012-02-22 |
Family
ID=45586173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101975382A Pending CN102360885A (en) | 2011-07-07 | 2011-07-07 | Combined current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102360885A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128713A (en) * | 2016-06-12 | 2016-11-16 | 嘉兴威士顿电子科技有限公司 | Lap wound secondary coil, method for winding and the current transformer of current transformer |
| CN106653337A (en) * | 2016-12-21 | 2017-05-10 | 山东华信电气股份有限公司 | Sleeve current transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049819U (en) * | 1989-04-07 | 1989-12-20 | 胡耀武 | Low-voltage current mutual inductor for measuring electric energy |
| CN1048627A (en) * | 1990-08-02 | 1991-01-16 | 李保业 | The current transformer of high permeance |
| CN202189670U (en) * | 2011-07-07 | 2012-04-11 | 张逢春 | Combined current converter |
-
2011
- 2011-07-07 CN CN2011101975382A patent/CN102360885A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049819U (en) * | 1989-04-07 | 1989-12-20 | 胡耀武 | Low-voltage current mutual inductor for measuring electric energy |
| CN1048627A (en) * | 1990-08-02 | 1991-01-16 | 李保业 | The current transformer of high permeance |
| CN202189670U (en) * | 2011-07-07 | 2012-04-11 | 张逢春 | Combined current converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128713A (en) * | 2016-06-12 | 2016-11-16 | 嘉兴威士顿电子科技有限公司 | Lap wound secondary coil, method for winding and the current transformer of current transformer |
| CN106128713B (en) * | 2016-06-12 | 2018-01-12 | 浙江格蕾特电器股份有限公司 | Lap wound secondary coil, method for winding and the current transformer of current transformer |
| CN106653337A (en) * | 2016-12-21 | 2017-05-10 | 山东华信电气股份有限公司 | Sleeve current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120222 |