CN201689775U - Manganin mutual inductor preventing alternating magnetic field - Google Patents
Manganin mutual inductor preventing alternating magnetic field Download PDFInfo
- Publication number
- CN201689775U CN201689775U CN2010201973706U CN201020197370U CN201689775U CN 201689775 U CN201689775 U CN 201689775U CN 2010201973706 U CN2010201973706 U CN 2010201973706U CN 201020197370 U CN201020197370 U CN 201020197370U CN 201689775 U CN201689775 U CN 201689775U
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- CN
- China
- Prior art keywords
- current sampling
- magnetic field
- alternating magnetic
- copper
- signal wires
- Prior art date
- 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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Abstract
The utility model discloses a maganin mutual inductor preventing alternating magnetic field, which comprises a fixing copper sheet, current sampling magnanin and two current sampling signal wires, wherein the two signal wires are arranged horizontally and then twisted together to the tail part, and used for preventing the magnetic disturbance. After being arranged horizontally, the two current sampling signal wires are crossed and twisted together to the tail part with the shortest distance. In the utility model, the vertical routing mode of the existing single wire is changed into the mutually horizontal routing mode, thus reducing the magnetic field induction area as far as possible, further solving the problem that the measurement is inaccurate due to the inaccurate current sampling as a current sampling loop is influenced due to the external alternating magnetic filed or the flux leakage of a self transformer, and effectively preventing the magnetic disturbance.
Description
Technical field
The utility model relates to a kind of current sample equipment, especially relates to a kind of copper-manganese instrument transformer that electronic electric energy meter is gathered current signal that is used for.
Background technology
The copper-manganese instrument transformer is because of himself having many excellent characteristic and cheap price, be widely used in many current sample equipment, particularly number of applications is very huge in the electronic electric energy meter, in electronic electric energy meter, be directly installed on the terminal or be connected on the relay, because of the current signal gathered very small, generally be the microvolt level, be subjected to the interference of outside alternating magnetic field especially easily and cause current sample and the metering inaccurate.In the copper-manganese instrument transformer of existing current sampling, the current sampling copper-manganese is fixed in the end of incoming cables of electronic equipment by fixing copper sheet, be connected with two current sampling signal lines between current sampling copper-manganese and the electronic circuit pcb board, the sampled signal line adopts vertical cabling mode (see figure 2), between holding wire and current sampling copper-manganese, electronic circuit pcb board, form like this one at random, shape, big or small irregular closed circuit.According to Faraday's electromagnetic induction law, the induced electromotive force computing formula that coil produces is:
(φ=BS wherein, B is that magnetic field intensity, S are effective area, N=1), when the outside has alternating magnetic field to disturb, on closed circuit, will produce induced current, induced current produces induced voltage on the current sampling copper-manganese, have a strong impact on the accuracy of current sample after this induced voltage is changed through subsequent conditioning circuit amplification, AD.So some lawless persons is convenient to be subject to the defective that outside alternating magnetic field influence can not accurately measure with existing electric energy meter based on the copper-manganese sampling and to carry out stealing, utilize error that this means stealing causes to change with the power of alternating magnetic field intensity through measuring and calculating, worst error can reach 100%.
The utility model content
The purpose of this utility model is to provide a kind of can effectively reduce the copper-manganese instrument transformer that the anti-alternating magnetic field of induced electromotive force disturbs.
The copper-manganese instrument transformer of this anti-alternating magnetic field that the utility model provides comprises fixedly copper sheet, current sampling copper-manganese and two current sampling signal lines, and is twisted together again up to afterbody after these two holding wires are horizontally-arranged, is used to prevent magnetic disturbance.
Two horizontally-arranged backs of current sampling signal line intersect twisted together up to afterbody with the shortest distance.
Because therefore the utility model has dwindled the magnetic field induction area as far as possible to the mode that the vertical cabling mode of existing holding wire changes the cabling of droping to the ground mutually into, (seeing that S2 is obviously much smaller than the S1 among Fig. 2 among Fig. 1), thereby solution has effectively effectively prevented magnetic disturbance because of outside alternating magnetic field or self transformer leakage field cause the inaccurate and then inaccurate problem of influence metering of current sample because of influencing current sampling circuit.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the prior art constructions schematic diagram.
Embodiment
The utility model still has two fixedly copper sheet 1, current sampling copper-manganese 2 and two holding wire A, B as can be seen from Figure 1, these two holding wires are corresponding respectively to be welded in 2 fixedly a point and the b points of copper sheet, then two holding wires are droped to the ground with the edge direction that is parallel to current sampling copper-manganese 2, carry out twisting after meeting, be that holding wire A lights to the right from a and drops to the ground, holding wire B from the b point left direction drop to the ground, carry out multiple twin then, up to tail end, fix with heat-shrinkable T bush at last in order to avoid holding wire returns pine and produce inductance loop.Notice that simultaneously a, b tack-weld on the fixing copper sheet 3 are short as far as possible.
After holding wire of the present utility model changes wire structures, by the right hand principle of Faradic electricity magnetic induction theorem as can be known, effective closed area that alternating magnetic field passes becomes S2 by the S1 of prior art, obviously S2 is much smaller than S1, and alternating magnetic field almost can be ignored to the interference of current sampling circuit like this.
Claims (1)
1. the copper-manganese instrument transformer of an anti-alternating magnetic field comprises fixedly copper sheet (3), current sampling copper-manganese (2) and two current sampling signal lines (1), it is characterized in that these two holding wires are twisted together again up to afterbody after horizontally-arranged, is used to prevent magnetic disturbance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201973706U CN201689775U (en) | 2010-05-20 | 2010-05-20 | Manganin mutual inductor preventing alternating magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201973706U CN201689775U (en) | 2010-05-20 | 2010-05-20 | Manganin mutual inductor preventing alternating magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689775U true CN201689775U (en) | 2010-12-29 |
Family
ID=43378053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201973706U Expired - Lifetime CN201689775U (en) | 2010-05-20 | 2010-05-20 | Manganin mutual inductor preventing alternating magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201689775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981046A (en) * | 2012-12-11 | 2013-03-20 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
| CN107271744A (en) * | 2017-07-03 | 2017-10-20 | 杭州海兴电力科技股份有限公司 | The Wiring structure of the pin configuration of manganese copper diverter, pcb board and pcb board |
-
2010
- 2010-05-20 CN CN2010201973706U patent/CN201689775U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981046A (en) * | 2012-12-11 | 2013-03-20 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
| CN102981046B (en) * | 2012-12-11 | 2015-04-15 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
| CN107271744A (en) * | 2017-07-03 | 2017-10-20 | 杭州海兴电力科技股份有限公司 | The Wiring structure of the pin configuration of manganese copper diverter, pcb board and pcb board |
| CN107271744B (en) * | 2017-07-03 | 2020-03-24 | 杭州海兴电力科技股份有限公司 | Lead structure of manganin shunt, PCB and wiring structure of PCB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |
|
| CX01 | Expiry of patent term |