CN114778917A - Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider - Google Patents
Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider Download PDFInfo
- Publication number
- CN114778917A CN114778917A CN202210302995.1A CN202210302995A CN114778917A CN 114778917 A CN114778917 A CN 114778917A CN 202210302995 A CN202210302995 A CN 202210302995A CN 114778917 A CN114778917 A CN 114778917A
- Authority
- CN
- China
- Prior art keywords
- sheet
- sampling
- shunt
- resistor body
- magnetic field
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/02—Constructional details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention relates to an anti-magnetic field shunt, an electric power meter thereof and a manufacturing method of the anti-magnetic field shunt, wherein the anti-magnetic field shunt comprises a sheet shunt and a sheet connecting sheet, wherein the sheet shunt comprises a current inflow end, a resistor body and a current outflow end which are electrically connected in sequence; the resistor body is provided with a separation groove to divide the effective resistor body into two effective resistor bodies with the same area: an upper semi-effective resistor body and a lower semi-effective resistor body; the sheet-shaped shunt is provided with a voltage end, a first sampling end and a second sampling end, the sheet-shaped connecting sheet penetrates through the separating groove and comprises an upper side sheet body with the area corresponding to the upper semi-effective resistor body, a bending sheet and a lower side sheet body, the lower side sheet body is connected with the bending sheet and further extends to the other side of the resistor body, and the area of the lower side sheet body corresponds to the lower semi-effective resistor body; the lower side sheet body of connection piece is equipped with the sampling extension end of the first sampling end of electric connection, it has the link to go up the side sheet body and upwards extend. Therefore, the accuracy of the magnetic field resistance of the instrument load current in milliampere level is improved.
Description
Technical Field
The invention relates to a diamagnetic field shunt used in an electric power instrument, an electric power instrument thereof and a manufacturing method of the diamagnetic field shunt, in particular to a diamagnetic field shunt which is suitable for the field of electric energy transmission, an electric power instrument thereof and a manufacturing method of the diamagnetic field shunt thereof.
Background
The current diverter has the advantages of high metering accuracy, small temperature influence and low cost, and is widely applied to single-phase intelligent electric energy meters, particularly manganese-copper diverters; due to the installation position of the shunt and the characteristics of the connection sampling lead, the manganin shunt can generate induced current when being interfered by a power frequency magnetic field, and the accuracy of the current metering can be seriously influenced.
The traditional manganin shunt carries out current sampling through a piece of manganin alloy, and the wiring is more dispersed, and the twisted pair of novel shunt needs to carry out point gluing fixed position or to make it difficult loose with the fixed shape of pyrocondensation pipe, and this is not only consuming time and power, still is unfavorable for automated production. In 2013, the enterprise standard of the electric energy meter is revised by national grid company, and in the influence quantity test of Q/GDW 1364 plus 2013 'technical Specification of Single-phase Intelligent electric energy meter', an 'electric energy meter voltage circuit is connected with 115% Un, a current loop has no current, a 0.5mT power frequency magnetic field is applied to the most sensitive part of the electric energy meter affected by the magnetic field, and the electric energy meter is not required to generate more than 1 pulse output within 20 times of theoretical starting time'. The proposal of the standard prompts the electric energy meter industry to actively seek a scheme for improving the anti-electromagnetic interference capability of the electric energy meter.
At present, according to the latest requirements of domestic and external electric energy meter industries, higher requirements are provided for the magnetic field interference resistance of the electric energy meter with small working current, and particularly, when the working current is 20mA or below, under the condition of magnetic field interference with the strength of 0.5mT from an uncertain direction, how to improve the accuracy of electric power detection is a problem which needs to be solved urgently in the industry.
Therefore, there is a need for an improved magnetic shunt and its power meter to improve the ability of the shunt to resist the interference of industrial frequency magnetic field.
Disclosure of Invention
The invention aims to provide a magnetic field resistant current divider capable of resisting power frequency magnetic field interference under a small working current, a power meter thereof and a manufacturing method of the magnetic field resistant current divider.
In order to achieve the technical purpose, the invention adopts the following technical modes: a diamagnetic field shunt comprises a sheet shunt and a sheet connecting sheet, wherein the sheet shunt comprises a current inflow end, a resistor body and a current outflow end which are electrically connected in sequence; the sheet-shaped shunt is sequentially provided with a voltage end, a first sampling end and a second sampling end along the flowing direction of the current, wherein the first sampling end is arranged on the lower side of the joint of the current inflow end and the lower semi-effective resistor body, and the second sampling end is arranged on the upper side of the joint of the current outflow end and the upper semi-effective resistor body; the sheet connecting sheet penetrates through the separation groove and comprises an upper side sheet body with the area corresponding to the upper semi-effective resistor body, a bending sheet which is connected with the upper side sheet body and penetrates through the separation groove, and a lower side sheet body which is connected with the bending sheet and further extends to the other side of the effective resistor body and has the area corresponding to the lower semi-effective resistor body; the lower side sheet body of connection piece is equipped with the sampling extension end of the first sampling end of electric connection, the side sheet body upwards extends there is the link on the upside.
As a further improvement of the present invention, the upper and lower semi-effective resistors are located on the same plane.
In a further improvement of the present invention, the sheet-like connection piece has the same width as the effective resistor body.
As a further improvement of the invention, the first sampling end and the second sampling end are arranged on the upper end surface and the lower end surface of the sheet-shaped shunt.
As a further improvement of the present invention, the first sampling end extends laterally to the lower side of the lower semi-effective resistor, and the sampling extension end extends downward from the lower sheet body and is electrically connected to the first sampling end.
As a further improvement of the invention, a concave part and a convex part which are matched with each other are arranged between the first sampling end and the sampling extending end so as to be connected in a positioning way.
As a further improvement of the invention, the voltage end extends upwards from the upper end of the current inlet end, and the voltage end, the connecting end and the second sampling end are all positioned at the upper end of the sheet-shaped shunt.
As a further improvement of the invention, the voltage end, the connecting end and the second sampling end are used for plugging to a PCB or connecting a twisted pair sampling line extension.
In order to achieve the technical purpose, the invention can also adopt the following technical modes:
an electric instrument comprises an electric instrument shell and the diamagnetic field shunt positioned in the electric instrument shell.
In order to achieve the technical purpose, the invention can also adopt the following technical modes:
the manufacturing method of the diamagnetic field shunt comprises the steps of respectively manufacturing the sheet shunt and the sheet connecting sheet;
the sheet-shaped connecting sheet passes through the separation groove and is attached to the sheet-shaped shunt;
electrically fixing the first sampling end and the sampling extending end between the sheet-shaped shunt and the sheet-shaped connecting sheet;
and inserting the voltage end of the sheet shunt, the connecting end of the sheet connecting sheet and the second sampling end of the sheet shunt onto the PCB or connecting the extension of the twisted pair sampling line.
Compared with the prior art, the anti-magnetic field current divider of the invention is provided with a separation groove on the effective resistor body along the direction of the current flowing through the resistor body, the separation groove divides the effective resistor body into two effective resistor bodies with the same area to form an upper half effective resistor body and a lower half effective resistor body along the current flowing direction, the sheet connecting sheet is arranged in the separating groove in a penetrating way and comprises an upper side sheet body with the area corresponding to the upper semi-effective resistor body, a bending sheet which is connected with the upper side sheet body and arranged in the separating groove in a penetrating way, and a lower side sheet body which is connected with the bending sheet and further extends to the other side of the effective resistor body and has the area corresponding to the lower semi-effective resistor body, so that the magnetic field current divider has strong anti-interference capability and high reliability, when the diamagnetic field shunt is applied to extremely small working current, the ammeter precision difference can be extremely small when the diamagnetic field shunt is confronted with strong magnetic field interference.
Drawings
FIG. 1 is a schematic structural diagram of the anti-magnetic field shunt according to the present invention;
fig. 2 is a schematic view of the structure at another angle in fig. 1.
Fig. 3 is a schematic view of a further angle in fig. 1.
FIG. 4 is an exploded view of the anti-magnetic field current divider of the present invention
Fig. 5 is a side view of the diamagnetic field splitter of the present invention.
Fig. 6 is an exploded view of fig. 5.
Fig. 7 is a top view of the anti-magnetic field shunt according to the present invention.
Fig. 8 is a schematic structural diagram of the anti-magnetic field current divider of the present invention mounted on a PCB board.
Fig. 9 is an exploded view of fig. 8.
Fig. 10 is a side view of fig. 8.
Fig. 11 is a front view of fig. 8.
Fig. 12 is a rear view of fig. 8.
Reference numerals:
Upper semi-effective resistor 121 of resistor 12
Lower semi-effective resistor 123 of separation groove 122
Connecting plate 2 with connecting hole 132
Connecting end 211 of upper sheet 21
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the field of shunt application, great knowledge is given to the problems in the prior art by the Vida electronics Co., Ltd as a supplier skilled in market demand in the industry, and the research and development team further invests huge investment on the original technology owned by the supplier, performs a long-time and large-scale experiment, scheme screening and a large amount of customer investigation, and finally obtains the technical scheme of the invention.
Fig. 1 to 12 are schematic structural diagrams of the diamagnetic field splitter 100 according to the present invention. The invention relates to a diamagnetic field shunt 100, which mainly comprises a sheet shunt 1 and a sheet connecting sheet 2.
The sheet-shaped shunt 1 comprises a current inflow end 11, a resistor 12 and a current outflow end 13 which are electrically connected in sequence; a separation groove 122 is provided on the resistor body 12 along the direction of the current flowing through the resistor body 12, the separation groove 122 divides the effective resistor body 12 into two effective resistor bodies 12 having the same area, and an upper effective resistor body 121 and a lower effective resistor body 123 along the direction of the current flowing are formed; the sheet-shaped shunt 1 is sequentially provided with a voltage end 111, a first sampling end 112 and a second sampling end 131 along the flowing direction of current, the first sampling end 112 is arranged at the lower side of the junction between the current inlet end 11 and the lower semi-effective resistor 123, that is, the first sampling end 112 can be arranged at the current inlet end 11, the resistor 12 or at the junction between the current inlet end 11 and the resistor 12 in different embodiments, and the second sampling end 131 is arranged at the upper side of the junction between the current outlet end 13 and the upper semi-effective resistor 121, that is, the second sampling end 131 can be arranged at the current outlet end 13, the resistor 12 or at the junction between the current outlet end 13 and the resistor 12 in different embodiments;
the sheet connecting piece 2 is inserted into the separating groove 122, and includes an upper side piece 21 with an area corresponding to the upper semi-effective resistor 121, a bending piece 22 connected to the upper side piece 21 and inserted into the separating groove 122, and a lower side piece 23 connected to the bending piece 22 and further extending to the other side of the effective resistor 12 and having an area corresponding to the lower semi-effective resistor 123; the lower side sheet body 23 of the connecting sheet 2 is provided with a sampling extending end 231 electrically connected with the first sampling end 112, and the upper side sheet body 21 extends upwards to form a connecting end 211. According to the arrangement, the sheet connecting piece 2, the upper semi-effective resistor body 121 and the lower semi-effective resistor body 123 form a twisted pair, the current generated by the resistor body 12 for cutting the magnetic induction lines can be offset with the current generated by the sheet connecting piece 2 for cutting the magnetic induction lines, the sheet connecting piece can resist external alternating magnetic fields at any angle, namely, the six projection surfaces can resist the interference of the external alternating magnetic fields, when the magnetic field resisting current divider 100 is applied to extremely small working current and faces strong magnetic field interference, the ammeter precision difference can be extremely small, for example, under the working current of 20mA or below and the magnetic field interference with the strength of 0.5mT, the ammeter precision error of the magnetic field resisting current divider 100 can be less than 10%, and therefore, the electric power meter can resist the excellent magnetic field interference under the extremely small working current.
The upper and lower semi-effective resistors 121 and 123 are located on the same plane, and thus, the sheet shunt 1 can be easily manufactured.
The sheet-like connection piece 2 has the same width as the effective resistor 12. The width can refer to the vertical width and also can refer to the horizontal width, so that the connecting sheet 2 and the effective resistor body 12 can realize a better offset effect in each direction in the face of alternating magnetic field interference, and the precision of the anti-magnetic field current divider 100 is improved.
The side direction of the sheet connecting piece 2 is Z-shaped. That is, the section of the sheet connecting piece 2 is roughly in a Z shape when viewed from the left and right direction, so that the sheet connecting piece 2 can be formed only by bending a flat sheet metal from two sides, and the manufacturing is convenient.
In the present embodiment, the first sampling tip 112 and the second sampling tip 131 are provided on the upper and lower end surfaces of the sheet shunt 1. With this arrangement, the sheet-shaped shunt 1 can be formed by cutting a flat sheet metal without additional welding or die-casting, which is convenient for manufacturing.
The first sampling end 112 extends downward from the lower end surface of the current inlet 11 and then further extends laterally to the lower side of the lower semi-effective resistor 123, and the sampling extending end 231 extends downward from the lower side sheet 23 and is electrically connected to the first sampling end 112. With such an arrangement, the first sampling end 112 and the sampling extension end 231 are respectively located at the lower sides of the effective resistor body 12 and the lower side sheet body 23, so that the manufacturing and the assembly are convenient, and the better cancellation effect of the external alternating magnetic field interference can be realized.
A concave portion 232 and a convex portion 1121 which are matched with each other are arranged between the first sampling end 112 and the sampling extending end 231. That is, in different embodiments, the positions of the concave portion 232 and the convex portion 1121 may be changed, as long as the insertion positioning effect can be achieved. With such an arrangement, the first sampling end 112 and the sampling extension end 231 can be electrically held by the concave portion 232 and the convex portion 1121 which are inserted into each other for positioning, and preferably, can be welded or riveted for positioning.
The voltage terminal 111 extends upward from the upper end surface of the current inlet terminal 11, and the voltage terminal 111, the connection terminal 211 and the second sampling terminal 131 are all located at the upper end of the sheet shunt 1. So set up, voltage end 111, link 211 and the second sampling end 131 three can be in the unified outward transport signal in the upper end of slice shunt 1, are convenient for gather required signal.
Specifically, the voltage terminal 111, the connection terminal 211 and the second sampling terminal 131 are used for plugging or connecting a twisted pair sampling line to the circuit board 200. The circuit board 200 is provided with a jack 201, the voltage end 111, the connection end 211 and the second sampling end 131 are respectively plugged or connected with a twisted pair sampling line and extend onto the jack 201, and the circuit board 200 is provided with a filter element, an AD chip and the like, so that an electric signal can be conveniently and timely converted into a digital signal without being interfered by an external alternating magnetic field.
The current inlet end 11 and the current outlet end 13 of the current divider 1 are provided with connection holes 113 and 132 for mounting terminal buttons (not shown), and in other embodiments, the current inlet end 11 and the current outlet end 13 may be directly and integrally extended with terminals (not shown) for connecting cables.
The invention also protects an electric power meter (not shown) comprising an electric power meter housing (not shown) and the diamagnetic field splitter 100 positioned in the electric power meter housing. The main core component of the power instrument is the magnetic field interference resistance of the magnetic field splitter 100, and the magnetic field interference resistance of the magnetic field splitter 100 under the condition of small working current and high magnetic field interference resistance can enable the power instrument to have excellent power data detection precision, so that the power instrument has the market competitive advantage of the core.
The invention also protects a manufacturing method of the diamagnetic field shunt 100, wherein the sheet shunt 1 and the sheet connecting sheet 2 are respectively manufactured; the sheet-shaped connecting piece 2 is attached to the sheet-shaped shunt 1 through the separation groove 122; electrically holding the first sampling end 112 and the sampling extension end 231 between the sheet shunt 1 and the sheet connection pad 2; the voltage end 111 of the sheet shunt 1 and the connection end 211 of the sheet connection piece 2 are plugged into the second sampling end 131 of the sheet shunt 1 or connected with the twisted pair sampling line and extend to the circuit board 200. The above steps are not limited in order. By the arrangement, the sheet-shaped shunt 1, the sheet-shaped connecting sheet 2 and the installation method between the sheet-shaped shunt and the sheet-shaped connecting sheet, the anti-magnetic field shunt 100 has excellent anti-magnetic field interference under the conditions of small working current and high magnetic field interference, and the power data detection accuracy of the power instrument is improved.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
A series of terms such as front, rear, left, right, upper, lower and the like used for technical features of the above-described embodiments are only used for convenience of description and understanding of the technical features, and do not limit the specific directions in practical use of the technical solutions.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A diamagnetic field shunt, characterized by: comprises a sheet-shaped shunt and a sheet-shaped connecting sheet,
the sheet-shaped current divider comprises a current inflow end, a resistor body and a current outflow end which are electrically connected in sequence;
a separating groove is arranged on the resistor body along the flowing direction of current flowing through the resistor body, the separating groove divides the effective resistor body into two effective resistor bodies with the same area, and an upper half effective resistor body and a lower half effective resistor body along the flowing direction of the current are formed; the sheet-shaped current divider is sequentially provided with a voltage end, a first sampling end and a second sampling end along the flowing direction of current, the first sampling end is arranged on the lower side of the joint of the current flowing-in end and the lower semi-effective resistor body, and the second sampling end is arranged on the upper side of the joint of the current flowing-out end and the upper semi-effective resistor body;
the sheet connecting sheet is arranged in the separating groove in a penetrating mode and comprises an upper side sheet body, a bending sheet and a lower side sheet body, the area of the upper side sheet body corresponds to that of the upper semi-effective resistor body, the bending sheet is connected with the upper side sheet body and arranged in the separating groove in a penetrating mode, the lower side sheet body is connected with the bending sheet and further extends to the other side of the effective resistor body, and the area of the lower side sheet body corresponds to that of the lower semi-effective resistor body; the lower side sheet body of connection piece is equipped with the sampling extension end of the first sampling end of electric connection, it has the link to go up the side sheet body and upwards extend.
2. The anti-magnetic field shunt according to claim 1, wherein: the upper semi-effective resistor body and the lower semi-effective resistor body are positioned on the same plane.
3. The diamagnetic field splitter according to claim 1, wherein: the width of the sheet connecting sheet is the same as that of the effective resistor body.
4. The anti-magnetic field shunt according to claim 1, wherein: the first sampling end and the second sampling end are arranged on the upper end face and the lower end face of the sheet-shaped shunt.
5. The anti-magnetic field shunt according to claim 1, wherein: the first sampling end extends to the lower side of the lower semi-effective resistor body in the lateral direction, and the sampling extending end extends downwards from the lower sheet body and is electrically connected with the first sampling end.
6. The diamagnetic field splitter according to claim 5, wherein: and a concave part and a convex part which are matched with each other are arranged between the first sampling end and the sampling extending end.
7. The diamagnetic field splitter according to claim 1, wherein: the voltage end extends upwards from the upper end of the current inlet end, and the voltage end, the connecting end and the second sampling end are all located at the upper end of the sheet-shaped shunt.
8. The diamagnetic field splitter according to claim 7, wherein: the voltage end, the connecting end and the second sampling end are used for being plugged onto a PCB or connected with a twisted pair sampling line to extend.
9. An electric power meter characterized in that: comprising a power meter housing and a diamagnetic field splitter according to any one of claims 1 to 8 located within the power meter housing.
10. A manufacturing method of a diamagnetic field shunt is characterized by comprising the following steps: comprising separately manufacturing the sheet diverter and the sheet tab of claims 1-8;
the sheet-shaped connecting sheet passes through the separation groove and is attached to the sheet-shaped shunt;
electrically fixing the first sampling end and the sampling extending end between the sheet-shaped shunt and the sheet-shaped connecting sheet;
and inserting the voltage end of the sheet shunt, the connecting end of the sheet connecting sheet and the second sampling end of the sheet shunt onto the PCB or connecting the twisted pair sampling wire for extension.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210302995.1A CN114778917A (en) | 2022-03-25 | 2022-03-25 | Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210302995.1A CN114778917A (en) | 2022-03-25 | 2022-03-25 | Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114778917A true CN114778917A (en) | 2022-07-22 |
Family
ID=82425279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210302995.1A Pending CN114778917A (en) | 2022-03-25 | 2022-03-25 | Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114778917A (en) |
-
2022
- 2022-03-25 CN CN202210302995.1A patent/CN114778917A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2023179181A1 (en) | Anti-magnetic field shunt, electric power meter, and manufacturing method for anti-magnetic field shunt | |
| CN202903841U (en) | Electronic watt-hour meter capable of resisting alternating magnetic field interference | |
| CN107271744B (en) | Lead structure of manganin shunt, PCB and wiring structure of PCB | |
| WO2021169456A1 (en) | Shunt lead structure, electric power instrument and method for manufacturing shunt lead structure | |
| CN210090554U (en) | Shunt of anti magnetic field interference and relay and electronic type electric energy meter thereof | |
| CN211856700U (en) | Shunt lead structure, wiring terminal button box thereof and electric instrument thereof | |
| CN203587681U (en) | Electronic electric energy meter resistant to magnetic-field interference | |
| CN217238183U (en) | Anti-magnetic field current divider and electric power instrument thereof | |
| CN201435305Y (en) | Current and voltage transformer module | |
| CN217212885U (en) | Anti-magnetic field current divider and electric power instrument thereof | |
| CN114778917A (en) | Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider | |
| CN204028161U (en) | A kind of current sample composite structure resisting strong magnetic for electric energy meter | |
| CN217212858U (en) | Anti-magnetic field current divider and electric power instrument thereof | |
| CN215986252U (en) | Anti-interference shunt of hard joint and electric energy meter | |
| CN104035000B (en) | Multicore cable terminal compression joint quality precise detection device and detection method | |
| CN202815087U (en) | Electronic electric energy meter capable of reducing alternating electromagnetic interference | |
| CN202815037U (en) | Electronic electric energy meter capable of reducing interference on current divider caused by alternating magnetic filed | |
| CN112305295B (en) | Composite current sensor | |
| CN215894730U (en) | Anti-interference manganese-copper shunt | |
| CN212725643U (en) | Be applied to new energy automobile and take temperature sensing function shunt | |
| CN212321705U (en) | Copper bar current sensor | |
| CN219997166U (en) | Shunt sampling module, relay module thereof and electric power instrument thereof | |
| CN114518481A (en) | Anti-magnetic field current divider, electric power meter thereof and manufacturing method of anti-magnetic field current divider | |
| KR20230016957A (en) | Connecting device of electric power meter with terminal blocks | |
| CN203672929U (en) | Manganin diverter with alternating magnetic field interference-proof property, relay and electronic electric energy meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |