CN202796417U - High-precision and wide load current mutual-inductor for metering - Google Patents
High-precision and wide load current mutual-inductor for metering Download PDFInfo
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- CN202796417U CN202796417U CN 201220402391 CN201220402391U CN202796417U CN 202796417 U CN202796417 U CN 202796417U CN 201220402391 CN201220402391 CN 201220402391 CN 201220402391 U CN201220402391 U CN 201220402391U CN 202796417 U CN202796417 U CN 202796417U
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- iron core
- metering
- precision
- load current
- inductor
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Abstract
The utility model discloses a high-precision and wide load current mutual-inductor for metering. The high-precision and wide load current mutual-inductor for metering is composed of an iron core, a primary coil and a secondary coil and is characterized in that the iron core utilizes a compound iron core, a groove is made in the process of rolling the iron core, and a high magnetic-conducting film alloy is embedded in the groove. According to the high-precision and wide load current mutual-inductor for metering, omitted records of errors for a high-energy-consumption enterprise with both overload operation and underload operation are reduced, and the technical problem of lowering loss for a line or an enterprise with over-criterion harmonic is solved.
Description
Technical field
The utility model relates to a kind of metering current mulual inductor.
Background technology
Traditional metering current mulual inductor generally adopts silicon steel sheet through taking annealing process as the iron core of current transformer for metering.Instrument transformer manufacturer satisfies the requirement of the 0.2S level underload error of power network proposition for improving precision in recent years, adopts one after another ultramicro-crystal alloy substituted for silicon steel plate iron core.
But user's electricity consumption situation varies in practice, the above large industrial cousumer of 400kVA specifically, and these users are by the uncertainty of market economy, and its customer charge is seriously uneven.Although electric power system has been taked many measures for the electric energy loss problem that underload brings, the electric energy loss that causes for excess load does not also cause enough attention.
Summary of the invention
The purpose of this utility model provides a kind of high-precision wide load current transformer for metering, has underrun high energy-consuming enterprises concurrently to solve excess load, reduces error in omission, for the circuit that has harmonic excess or enterprise, falls the technical problem of damage.
In order to realize the foregoing invention purpose, the technical scheme that the utility model adopts is as follows:
A kind of high-precision wide load current transformer for metering is comprised of iron core, primary winding, secondary coil, and its iron core adopts composite iron core, makes groove when rolling iron core, the ripple film alloy of the embedded high magnetic conduction of groove.
Advantage of the present utility model is as follows: both guaranteed the magnetic saturation ability of superelevation, solved simultaneously the impact of line harmonic on the core sataration degree, when load reached 200%, its error curve was still mild.By a large amount of practical proofs, adopt these series of products the abnormal user of load, institute's quantity calculation is higher than or is equivalent to high for the low institute's quantity calculation of counting substantially, for existing simultaneously excess load to have underrun high energy-consuming enterprises concurrently, reduce to leak to count and reach as high as 3% of total electric weight, for the circuit that has harmonic excess or enterprise, fall that to decrease effect more remarkable, have widely dissemination.
Description of drawings
Fig. 1 is core structure front view of the present utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Embodiment
Core structure of the present utility model is referring to Fig. 1,2,3.This high-precision wide load current transformer for metering is comprised of iron core, primary winding, secondary coil, its iron core adopts composite iron core, when rolling iron core, make groove, the embedded Alperm 2 of groove, described Alperm 2 is ripple film alloy or ultramicro-crystal alloy.Coiling secondary coil, then coiling primary winding on the compound iron core that is formed by ripple film alloy or ultramicro-crystal alloy and conventional silicon steel sheet 1.To realize that the electric load curent change is large, the metering place of precision prescribed.
The advantage of ultramicro-crystal alloy is that initial permeability is very high, and precision is very high when underload, but its saturation flux density is lower, generally only is equivalent to 40% of ordinary silicon steel disc shaped iron core.When load surpasses 120%, its characteristic curve generation significant change, when load reached 150%, ultramicro-crystal alloy had entered the saturation region, its error acute variation (being reduced to 1 grade).When reaching 200% when above, ultramicro-crystal alloy is saturated, and primary current increases, and secondary current no longer increases.Therefore, the result of overload operation, the metering line loss that causes is far longer than underload.And conventional silicon sheet core saturation magnetic induction is higher, and less in excess load time error impact, but large at the underload time error, precision is low, is difficult to satisfy the requirement of the error of power network 0.2S level.In addition, because effective Power quality management is not yet carried out in domestic electric power system, individual line harmonic content severe overweight, harmonic wave has aggravated again the magnetic saturation of microcrystalline iron core, more the loss of aggravation metering electric weight.
The utility model adopts composite iron core for above situation in the core design manufacturing, it is made of silicon steel and ripple film alloy or ultramicro-crystal alloy.When underrun, the work of ripple film alloy material, less than conventional products error, energy consumption is low; When normal duty and during overload operation, iron core work, composite iron core adopts the ultra-thin import ferrosilicon oxygen steel band (28H-0.10S) of the high magnetic conduction thinner a times than conventional silicon steel sheet through the high-temperature metallography annealing process, the power dissipation ratio conventional products descends more than 80%, the numerical control cutting, when rolling iron core, make groove, the ripple film alloy of the embedded high magnetic conduction of groove.
Claims (1)
1. a high-precision wide load current transformer for metering is comprised of iron core, primary winding, secondary coil, it is characterized in that iron core adopts composite iron core, makes groove when rolling iron core, the ripple film alloy of the embedded high magnetic conduction of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402391 CN202796417U (en) | 2012-08-15 | 2012-08-15 | High-precision and wide load current mutual-inductor for metering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220402391 CN202796417U (en) | 2012-08-15 | 2012-08-15 | High-precision and wide load current mutual-inductor for metering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202796417U true CN202796417U (en) | 2013-03-13 |
Family
ID=47823627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220402391 Expired - Fee Related CN202796417U (en) | 2012-08-15 | 2012-08-15 | High-precision and wide load current mutual-inductor for metering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202796417U (en) |
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2012
- 2012-08-15 CN CN 201220402391 patent/CN202796417U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BAODING JIUDING BAOHU ELECTRIC CO., LTD. Free format text: FORMER NAME: BAODING JIUDING ELECTRIC EQUIPMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 071000 private science and Technology Industrial Park, 71 East Road, Shibei District, Hebei, Baoding Patentee after: BAODING JIUDING BAOHU ELECTRIC Co.,Ltd. Address before: 071000 private science and Technology Park, 71 East Road, Shibei District, Hebei, Baoding Patentee before: Baoding Jiuding Electric Equipment Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20210815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |