CN202870138U - Manganin shunt and electronic Watt-hour meter - Google Patents
Manganin shunt and electronic Watt-hour meter Download PDFInfo
- Publication number
- CN202870138U CN202870138U CN201220470021.6U CN201220470021U CN202870138U CN 202870138 U CN202870138 U CN 202870138U CN 201220470021 U CN201220470021 U CN 201220470021U CN 202870138 U CN202870138 U CN 202870138U
- Authority
- CN
- China
- Prior art keywords
- manganese
- copper
- current sampling
- sampling wire
- weld tabs
- 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
Links
- 229910000896 Manganin Inorganic materials 0.000 title abstract 9
- 238000005070 sampling Methods 0.000 claims abstract description 83
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 119
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 4
- 238000005476 soldering Methods 0.000 abstract 2
- 238000003466 welding Methods 0.000 description 8
- 238000005303 weighing Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model provides a manganin shunt and an electronic Watt-hour meter. The manganin shunt comprises a manganin body and a current sampling wire pair, wherein soldering lugs are arranged at terminals of the current sampling wire pair respectively and fixedly connected to the manganin body along longitudinal end faces of the soldering lugs, such that the current sampling wire pair is electrically connected to the manganin body. According to the utility model, the interference current of the magnetic field of a transformer on the manganin shunt is reduced, and the low-current precision error of the manganin shunt is reduced, thereby solving the problem that the low-current precision error is great because the manganin shunt is interfered by the power frequency magnetic field of the transformer.
Description
Technical field
The utility model relates to the electronic-metering technology field, particularly a kind of manganese copper diverter and electronic electric energy meter.
Background technology
Along with the development growth of national intelligent grid, electric energy meter is as the end product of intelligent grid, and its output is increasing, and will be applied to widely in the city and country electrical network of China.
Adopt comparatively widely manganese copper diverter as the current sample device in the electric energy meter at present, because manganese copper diverter is simple in structure, the advantages such as volume is little, and is easy for installation and with low cost are so it all has use at most of single-phase electronic energy meters and small part three-phase meter.
Shown in Fig. 1 a and Fig. 1 b, copper sheet 2 and copper-manganese sheet 3 that traditional shunt comprises sampling wire 1, welds with this sampling wire 1, described shunt is when the metering of wide-range ammeter, the leakage field that is subject to self power transformer disturbs, its little current precision (typical 5%Ib, Ib is rated current) generally deviation is larger, exceeds designing requirement.
The utility model content
The purpose of this utility model is to propose a kind of manganese copper diverter, can solve because being subjected to the interference of transformer power frequency magnetic field to cause measuring accuracy large problem of deviation when the little electric current.
For achieving the above object, the utility model proposes a kind of manganese copper diverter, comprise copper-manganese body and current sampling wire pair, described current sampling wire is respectively equipped with weld tabs to end, described weld tabs is fixedly connected on the copper-manganese body along the end face of its length direction, so that described current sampling wire is to being electrically connected at the copper-manganese body.
Further, in above-mentioned manganese copper diverter, described weld tabs is rectangular-shaped, and the end face of its Width is welded in the right end of described current sampling wire.
Further, in above-mentioned manganese copper diverter, described copper-manganese body is provided with two binding posts, can weld with the end face of described weld tabs length direction, so that described current sampling wire is to being electrically connected at the copper-manganese body.
Further, in above-mentioned manganese copper diverter, first current sampling wire and the second current sampling wire of described current sampling wire to comprising mutual cross winding, an end of described the first current sampling wire and the second current sampling wire is connected in sample circuit, and the other end is connected to weld tabs.
Further, in above-mentioned manganese copper diverter, the other end of described the first current sampling wire and the second current sampling wire is welded in the end face of the Width of weld tabs, and the end face by described weld tabs length direction is welded in the copper-manganese body again.
Further, in above-mentioned manganese copper diverter, also be provided with connection terminal on the described copper-manganese body, be connected with the sampling reference conductor of using with reference to ground as current sampling on it.
Further, in above-mentioned manganese copper diverter, described copper-manganese body comprises the copper-manganese sheet and is located in the copper sheet at described copper-manganese sheet two ends.
Further, in above-mentioned manganese copper diverter, described copper-manganese body comprises copper-manganese sheet and two copper sheets, and described two copper sheets are located on the described copper-manganese sheet the dorsad right side of current sampling wire.
The utility model also provides a kind of electronic electric energy meter, and it comprises above-mentioned manganese copper diverter and is connected in the metering special chip at manganese copper diverter sample line two ends.
The utility model manganese copper diverter and electronic electric energy meter have reduced the interference current that manganese copper diverter is subject to transformer magnetic field, the trueness error of manganese copper diverter when having improved little electric current efficiently solves manganese copper diverter because disturbed by the transformer power frequency magnetic field to cause measuring accuracy large problem of deviation when the little electric current.
Description of drawings
Fig. 1 a is the structural representation of prior art manganese copper diverter;
Fig. 1 b is another structural representation of prior art manganese copper diverter;
Fig. 2 is the structural representation of the utility model manganese copper diverter one embodiment;
Fig. 3 is the structural representation of another embodiment of the utility model manganese copper diverter.
Embodiment
Describe preferred embodiment of the present utility model in detail below in conjunction with accompanying drawing.
See also Fig. 2, the utility model manganese copper diverter comprises that copper-manganese body 10 and current sampling wire are to 20, described current sampling wire is respectively equipped with weld tabs 30 to 20 ends, described weld tabs 30 is fixedly connected on copper-manganese body 10 along the end face of its length direction, so that described current sampling wire is electrically connected at copper-manganese body 10 to 20.
Wherein, described weld tabs 30 is rectangular-shaped, the end face of its Width is welded in described current sampling wire to 20 end, the end face of described weld tabs 30 length directions is welded in copper-manganese body 10, vertical welding than traditional weld tabs, the utility model manganese copper diverter so that the current sampling wire is as far as possible minimum with the area in weld tabs 30 and copper-manganese body 10 besieged cities to 20, is conducive to reduce the interference current that manganese copper diverter is subject to transformer magnetic field by weld tabs 30 is adopted horizontal welding.
Described current sampling wire comprises the first current sampling wire 202 and the second current sampling wire 204 to 20, described the first current sampling wire 202 and the second current sampling wire 204 mutual cross windings, one end of described the first current sampling wire 202 and the second current sampling wire 204 is connected in the sample circuit (not shown), and the other end is connected to weld tabs 30.Particularly, the other end of described the first current sampling wire 202 and the second current sampling wire 204 is welded in the end face of the Width of weld tabs 30, end face by described weld tabs 30 length directions is welded in copper-manganese body 10 again, so that described the first current sampling wire 202 and the second current sampling wire 204 are electrically connected at copper-manganese body 10.
Described copper-manganese body 10 is provided with two binding posts 40, can weld with the end face of described weld tabs 30 length directions, so that described current sampling wire is electrically connected at copper-manganese body 10 to 20.Also be provided with connection terminal 50 on the described copper-manganese body 10, be connected with sampling reference conductor 60 on it, this sampling reference conductor 60 is connected with the reference ground on sampled point road, and effect is the reference as current sample.
In the present embodiment, described copper-manganese body 10 comprises copper-manganese sheet 102 and is located at the copper sheet 104 at described copper-manganese sheet 102 two ends, forms the copper-manganese body of a rectangle.
The utility model manganese copper diverter principle of work is as follows:
The utility model manganese copper diverter is by adopting horizontal welding with weld tabs 30, it is the end face that the other end of described the first current sampling wire 202 and the second current sampling wire 204 is welded in the Width of weld tabs 30, end face by described weld tabs 30 length directions is welded in copper-manganese body 10 again, than vertical welding of the prior art, the end face that is described weld tabs 30 Widths is welded in copper-manganese body 10, the current sampling wire of the utility model manganese copper diverter is less with the area S in weld tabs 30 and copper-manganese body 10 besieged cities to 20, like this so that the magnetic flux phi of passing this area S (according to gauss magnetic field law: Φ=BS) reduce accordingly; According to maxwell theory, the electromotive force that current sampling wire centering produces is directly proportional with the variable quantity of magnetic flux, because of the magnetic induction density B that transformer produces constant, area S reduces, flux change amount Φ also reduces, so the electromotive force that current sampling wire centering produces also reduces, so also corresponding reducing of the interference current that the utility model manganese copper diverter is subject to transformer magnetic field.
The below further specifies the interference current in transformer magnetic field to the impact of ammeter precision.
Suppose that the interference current size that transformer magnetic field causes is I in the sampling wire
g, the sampling current size that produces under the nominal current conditions is I
B0So the computation chip actual samples arrives to get actual current I in the electronic weighing instrument
sFor: I
s=I
B0+ I
gElectronic weighing instrument generally adopts under the nominal current conditions and calibrates, and can think that at this moment Is is accurately.Suppose that when electric current that electronic weighing instrument flows through was reduced to 5% rated current, the sampling current size that produce this moment was I
B1, I in theory
B1=5%I
B0, and the actual metered chip samples to get actual current I
S1For:
I
S1=I
B1+ I
g, i.e. I
S1=5%I
B0+ I
g=5% (I
s-I
g)+
IG=5%I
s+ 95%I
g
And when 5% rated current, generally do not calibrate, so the test error of electronic weighing instrument is 5%I at this moment
s=I
S1-95%I
g, that is to say less than normal than reality.This shows, by reducing I
gTrueness error in the time of can improving little electric current.The utility model manganese copper diverter is subject to corresponding the reducing of interference current in transformer magnetic field, thereby the trueness error of manganese copper diverter when having improved little electric current has solved manganese copper diverter because disturbed by the transformer power frequency magnetic field to cause measuring accuracy large problem of deviation when the little electric current.
See also Fig. 3, present embodiment and above-described embodiment are basic identical, and difference only is:
Described copper-manganese body 10 ' comprises copper-manganese sheet 102 ' and two copper sheets 104 ', and described two copper sheets 104 ' are located on the described copper-manganese sheet 102 ' current sampling wire dorsad to a side of 20.
In addition, the utility model also provides a kind of electronic electric energy meter, the metering special chip (not shown) that it comprises manganese copper diverter and is connected in manganese copper diverter sample line two ends; Described manganese copper diverter comprises that copper-manganese body 10 and current sampling wire are to 20, described current sampling wire is respectively equipped with weld tabs 30 to 20 ends, described weld tabs 30 is fixedly connected on copper-manganese body 10 along the end face of its length direction, so that described current sampling wire is electrically connected at copper-manganese body 10 to 20.
Wherein, described weld tabs 30 is rectangular-shaped or approximate rectangular-shaped, the end face of its Width is welded in described current sampling wire to 20 end, the end face of described weld tabs 30 length directions is welded in copper-manganese body 10, vertical welding than traditional weld tabs, the utility model manganese copper diverter is by adopting horizontal welding with weld tabs 30, so that the current sampling wire is as far as possible minimum with the area in weld tabs 30 and copper-manganese body 10 besieged cities to 20, be conducive to reduce the interference current that manganese copper diverter is subject to transformer magnetic field.
Described current sampling wire comprises the first current sampling wire 202 and the second current sampling wire 204 to 20, described the first current sampling wire 202 and the second current sampling wire 204 mutual cross windings, one end of described the first current sampling wire 202 and the second current sampling wire 204 is connected in the sample circuit (not shown), and the other end is connected to weld tabs 30.Particularly, the other end of described the first current sampling wire 202 and the second current sampling wire 204 is welded in the end face of the Width of weld tabs 30, end face by described weld tabs 30 length directions is welded in copper-manganese body 10 again, so that described the first current sampling wire 202 and the second current sampling wire 204 are electrically connected at copper-manganese body 10.
Described copper-manganese body 10 is provided with two binding posts 40, can weld with the end face of described weld tabs 30 length directions, so that described current sampling wire is electrically connected at copper-manganese body 10 to 20.Also be provided with connection terminal 50 on the described copper-manganese body 10, be connected with sampling reference conductor 60 on it, this sampling reference conductor 60 is connected with the reference ground on sampled point road, and effect is the reference as current sample.
The utility model manganese copper diverter and electronic electric energy meter are by adopting weld tabs horizontal welding, than vertical welding of the prior art, the current sampling wire of the utility model manganese copper diverter pair is less with the area S in weld tabs and copper-manganese body besieged city, the interference current that manganese copper diverter is subject to transformer magnetic field is corresponding reducing also, the interference current in transformer magnetic field is corresponding to be reduced so that manganese copper diverter is subject to, thereby the trueness error of manganese copper diverter when having improved little electric current efficiently solves manganese copper diverter because disturbed by the transformer power frequency magnetic field to cause measuring accuracy large problem of deviation when the little electric current; And technique is simple, and the production mould that need not change original copper-manganese can be processed.
To sum up, the utility model manganese copper diverter and electronic electric energy meter have reduced the interference current that manganese copper diverter is subject to transformer magnetic field, the trueness error of manganese copper diverter when having improved little electric current efficiently solves manganese copper diverter because disturbed by the transformer power frequency magnetic field to cause measuring accuracy large problem of deviation when the little electric current.
Here description of the present utility model and application is illustrative, is not to want with scope restriction of the present utility model in the above-described embodiments.Here the distortion of disclosed embodiment and change is possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that in the situation that does not break away from spirit of the present utility model or essential characteristic, and the utility model can be with other form, structure, layout, ratio, and realize with other assembly, material and parts.In the situation that does not break away from the utility model scope and spirit, can carry out other distortion and change to disclosed embodiment here.
Claims (9)
1. manganese copper diverter, it is characterized in that comprise copper-manganese body and current sampling wire pair, described current sampling wire is respectively equipped with weld tabs to end, described weld tabs is fixedly connected on the copper-manganese body along the end face of its length direction, so that described current sampling wire is to being electrically connected at the copper-manganese body.
2. manganese copper diverter according to claim 1 is characterized in that, described weld tabs is rectangular parallelepiped, and the end face of its Width is welded in the right end of described current sampling wire.
3. manganese copper diverter according to claim 2 is characterized in that, described copper-manganese body is provided with two binding posts, can weld with the end face of described weld tabs length direction, so that described current sampling wire is to being electrically connected at the copper-manganese body.
4. manganese copper diverter according to claim 3, it is characterized in that, first current sampling wire and the second current sampling wire of described current sampling wire to comprising mutual cross winding, one end of described the first current sampling wire and the second current sampling wire is connected in sample circuit, and the other end is connected to weld tabs.
5. manganese copper diverter according to claim 4, it is characterized in that, the other end of described the first current sampling wire and the second current sampling wire is welded in the end face of the Width of weld tabs, and the end face by described weld tabs length direction is welded in the copper-manganese body again.
6. manganese copper diverter according to claim 5 is characterized in that, also is provided with connection terminal on the described copper-manganese body, is connected with the sampling reference conductor of using with reference to ground as current sampling on it.
7. manganese copper diverter according to claim 1 is characterized in that, described copper-manganese body comprises the copper-manganese sheet and is located at the copper sheet at described copper-manganese sheet two ends.
8. manganese copper diverter according to claim 1 is characterized in that, described copper-manganese body comprises copper-manganese sheet and two copper sheets, and described two copper sheets are located on the described copper-manganese sheet the dorsad right side of current sampling wire.
9. electronic electric energy meter, it comprises manganese copper diverter and is connected in the metering special chip at manganese copper diverter sample line two ends, it is characterized in that, described manganese copper diverter is such as each described manganese copper diverter of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220470021.6U CN202870138U (en) | 2012-09-14 | 2012-09-14 | Manganin shunt and electronic Watt-hour meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220470021.6U CN202870138U (en) | 2012-09-14 | 2012-09-14 | Manganin shunt and electronic Watt-hour meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202870138U true CN202870138U (en) | 2013-04-10 |
Family
ID=48036847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220470021.6U Expired - Lifetime CN202870138U (en) | 2012-09-14 | 2012-09-14 | Manganin shunt and electronic Watt-hour meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202870138U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439547A (en) * | 2013-09-12 | 2013-12-11 | 南京能瑞自动化设备股份有限公司 | Intelligent electric meter relay support assembly capable of eliminating power frequency magnetic field interference |
| CN105319424A (en) * | 2014-07-04 | 2016-02-10 | 山西兴永明仪器仪表有限责任公司 | Shunt |
| CN108226631A (en) * | 2017-12-27 | 2018-06-29 | 南昌市科陆智能电网科技有限公司 | A kind of single-phase measurement module of anti-magnetic interference |
| CN108845179A (en) * | 2018-06-07 | 2018-11-20 | 宁波三星智能电气有限公司 | electric energy meter current sampling module |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A high-precision smart meter based on shunt |
| CN112216562A (en) * | 2019-12-20 | 2021-01-12 | 青岛鼎信通讯股份有限公司 | Three-phase meter magnetic latching relay with manganin shunt |
-
2012
- 2012-09-14 CN CN201220470021.6U patent/CN202870138U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103439547A (en) * | 2013-09-12 | 2013-12-11 | 南京能瑞自动化设备股份有限公司 | Intelligent electric meter relay support assembly capable of eliminating power frequency magnetic field interference |
| CN103439547B (en) * | 2013-09-12 | 2017-07-18 | 南京能瑞自动化设备股份有限公司 | Solve the intelligent electric meter relay bracket component of power frequency magnetic field interference |
| CN105319424A (en) * | 2014-07-04 | 2016-02-10 | 山西兴永明仪器仪表有限责任公司 | Shunt |
| CN105319424B (en) * | 2014-07-04 | 2019-04-19 | 山西兴永明仪器仪表有限责任公司 | A kind of current divider |
| CN108226631A (en) * | 2017-12-27 | 2018-06-29 | 南昌市科陆智能电网科技有限公司 | A kind of single-phase measurement module of anti-magnetic interference |
| CN108226631B (en) * | 2017-12-27 | 2024-02-23 | 深圳市科陆电子科技股份有限公司 | Single-phase metering module for resisting magnetic field interference |
| CN108845179A (en) * | 2018-06-07 | 2018-11-20 | 宁波三星智能电气有限公司 | electric energy meter current sampling module |
| CN109959821A (en) * | 2018-10-11 | 2019-07-02 | 郭建国 | A high-precision smart meter based on shunt |
| CN112216562A (en) * | 2019-12-20 | 2021-01-12 | 青岛鼎信通讯股份有限公司 | Three-phase meter magnetic latching relay with manganin shunt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518057 Guangdong city of Shenzhen province Nanshan District South Road seven No. 007 Digital Technology Park A3 Building 5 floor Patentee after: SHENZHEN GOLDEN SQUARE TECHNOLOGY Co.,Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District South Road seven No. 007 Digital Technology Park A3 Building 5 floor Patentee before: Shenzhen Golden Square Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: 518000 Guangdong city of Shenzhen province Nanshan District South Road seven No. 007 Shenzhen Digital Technology Park A3 Building 5 floor C District Patentee after: Shenzhen jinzhengfang Technology Co.,Ltd. Address before: 518057 Guangdong city of Shenzhen province Nanshan District South Road seven No. 007 Digital Technology Park A3 Building 5 floor Patentee before: SHENZHEN GOLDEN SQUARE TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |