CN201549366U - Direct current component preventing current transformer - Google Patents
Direct current component preventing current transformer Download PDFInfo
- Publication number
- CN201549366U CN201549366U CN200920103094XU CN200920103094U CN201549366U CN 201549366 U CN201549366 U CN 201549366U CN 200920103094X U CN200920103094X U CN 200920103094XU CN 200920103094 U CN200920103094 U CN 200920103094U CN 201549366 U CN201549366 U CN 201549366U
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- China
- Prior art keywords
- current transformer
- secondary coil
- stitch
- iron core
- electric energy
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model relates to a current transformer with the function of direction current component prevention in an electronic electric energy meter. A secondary coil is arranged in an insulted casing of the current transformer, the secondary coil is formed by a composite iron core and an enameled wire wound outside the composite iron core, and the head and the tail of the secondary coil are connected with secondary output pins respectively; and two fixed pins are arranged on the insulated casing, positions of the secondary output pins and the fixed pins on the insulated casing correspond to the positions reserved on an electricity meter, and the insulated casing, the secondary coil, the secondary output pins and the fixed pins are integrally packaged through epoxy resins. The current transformer is not only provided with high accuracy of AC current measurement of a common AC current transformer, but also ensures that the influence quantity of direction current component and even harmonics on an electric energy meter in an AC line can be controlled within the standard requirements.
Description
Technical field
The utility model relates to the current transformer with anti-DC component function in a kind of electronic electric energy meter.
Background technology
The ripe current measurement mode of using always in the electronic electric energy meter at present is based on the common AC current transformer of electromagnetic induction principle, under normal circumstances be sinusoidal ac in the electrical network loop, this moment, common AC current transformer can realize accurate metering preferably; But development along with power electronic technology, applying also of various Switching Power Supplies brought interference and pollution to electrical network, make the simple alternating current waveform that distortion take place and contain in various degree DC component, this moment, the measure error of common AC current transformer can increase rapidly, it is big to cause the electric energy meter error in dipping to increase, also clearly stipulated the test request of DC component and the even-order harmonic amount of influence in the alternating current circuit in GB/T 17215-2002 " 1 grade exchange active electric energy meter with the 2 grades of state types " standard, common AC current transformer can not meet the demands.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of current transformer with anti-DC component function, this instrument transformer can also make DC component and even-order harmonic in the alternating current circuit that the amount of influence of electric energy meter is controlled in the standard-required when having high AC measurment accuracy.
The utility model adopts following technical scheme:
The utility model is provided with a secondary coil in the insulation crust of current transformer, secondary coil is to be made of a compound iron core and the enamelled wire that is wrapped in compound iron core outside, the head and tail of secondary coil is connected with secondary output stitch respectively, insulation crust is provided with two fixedly stitch, the position that secondary output stitch and fixing stitch are reserved on the position that is provided with on the insulation crust and ammeter is corresponding, insulation crust, secondary coil, secondary output stitch and fixedly stitch be one by epoxy encapsulation.
The used compound iron core of the utility model is iron based nano crystal material and the compound iron core of Fe-based amorphous material.
The output of the utility model secondary coil can be the stitch lead-out mode, also can be the lead-in wire lead-out mode.
The utility model good effect is as follows:
The utility model not only has the very high ac current measurement accuracy of common AC current transformer, and DC component and even-order harmonic in the alternating current circuit are controlled in the standard-required the amount of influence of electric energy meter.
Prove through experimental data, 30 (120) the A electronic electric energy meters that the anti-DC component current transformer that utilizes the utility model to provide is made, it exchanges sum of errors dc error precision and all meets the demands, and 30 (120) the A electric energy meter error test datas that concrete experiment records are as follows:
Above-mentioned experimental data shows that the electronic electric energy meter that the anti-DC component current transformer that utilizes the utility model to provide is made can satisfy the interchange sum of errors dc error required precision of 1 grade of electric energy meter fully.
Description of drawings
Accompanying drawing 1 is the utility model structural representation;
Accompanying drawing 2 is looked up the surface structure schematic diagram for the utility model.
In accompanying drawing 1: 1 anti-DC component current transformer, 2 levels are exported stitch, 3 fixedly stitch, 4 insulation crusts, 5 compound iron cores, 6 secondary coils.
Embodiment
The utility model utilizes electromagnetic induction principle, elementary is punching one circle, on annular core, be wound with secondary coil, the configuration of the secondary coil turn ratio by instrument transformer, electric current that will be bigger accurately is transformed into the little electric current of milliampere level that can directly measure with instrument.The utility model is elementary punching structure, is provided with secondary coil in insulation shell, sets as one by the epoxy resin envelope.
Accompanying drawing 1,2 is an embodiment of the present utility model, as accompanying drawing 1, shown in 2, in the accompanying drawings, in the insulation crust 4 of anti-DC component current transformer 1, be placed with a secondary coil 6, secondary coil 6 is made up of with the enamelled wire that is wrapped in compound iron core 5 outsides a compound iron core 5, the head and tail of secondary coil 6 is drawn with secondary output stitch 2 respectively, two fixedly stitch 3 are housed on the correct position of insulation crust 4, mate fully secondary output stitch 2 and the position of fixedly reserving on the installation site of stitch 3 and the ammeter, conveniently install, adopt the embedding of epoxy resin one during production, with insulation crust 4, secondary coil 6, secondary output stitch 2 and fixedly stitch 3 be packaged as a whole, insulation is good.Described compound iron core 5 is iron based nano crystal material and the compound iron core of Fe-based amorphous material.Secondary coil 6 outputs can be the stitch lead-out mode, also can be the lead-in wire lead-out mode.
Claims (2)
1. anti-DC component current transformer, it is characterized in that in the insulation crust (4) of current transformer (1), being provided with a secondary coil (6), secondary coil (6) is to be made of a compound iron core (5) and the enamelled wire that is wrapped in compound iron core (5) outside, the head and tail of secondary coil (6) is connected with secondary output stitch (2) respectively, insulation crust (4) is provided with two fixedly stitch (3), secondary output stitch (2) and fixing stitch (3) are gone up the position of reserving on the position that is provided with and the ammeter at insulation crust (4) corresponding, insulation crust (4), secondary coil (6), secondary output stitch (2) and fixedly stitch (3) be one by epoxy encapsulation.
2. a kind of anti-DC component current transformer according to claim 1 is characterized in that secondary coil (6) output can be the stitch lead-out mode, also can be the lead-in wire lead-out mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920103094XU CN201549366U (en) | 2009-06-03 | 2009-06-03 | Direct current component preventing current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920103094XU CN201549366U (en) | 2009-06-03 | 2009-06-03 | Direct current component preventing current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201549366U true CN201549366U (en) | 2010-08-11 |
Family
ID=42604546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920103094XU Expired - Lifetime CN201549366U (en) | 2009-06-03 | 2009-06-03 | Direct current component preventing current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201549366U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108335831A (en) * | 2018-03-30 | 2018-07-27 | 江西欧美亚电子有限公司 | A kind of patch type filter |
-
2009
- 2009-06-03 CN CN200920103094XU patent/CN201549366U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108335831A (en) * | 2018-03-30 | 2018-07-27 | 江西欧美亚电子有限公司 | A kind of patch type filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Direct current component preventing current transformer Effective date of registration: 20160531 Granted publication date: 20100811 Pledgee: Bank of China, Limited by Share Ltd, Xinji branch Pledgor: Hebei Shenke Electronics Co., Ltd. Registration number: 2016130000007 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200825 Granted publication date: 20100811 Pledgee: Bank of China, Limited by Share Ltd, Xinji branch Pledgor: HEBEI SHENKE ELECTRONICS Co.,Ltd. Registration number: 2016130000007 |