New Standard Anti-Magnetic Field Shunt and its Power Meters

Abstract

This utility model relates to a new standard anti-magnetic field shunt and its power meter, comprising a plate-shaped shunt consisting of a current inlet, a resistor, and a current outlet connected in sequence. The plate-shaped shunt has a voltage terminal, a first sampling terminal, and a second sampling terminal. The first sampling terminal is electrically connected to a first sampling connector, and the second sampling terminal is electrically connected to a second sampling connector. The first sampling connector includes a first holding portion for electrically connecting the first sampling terminal, a first part extending from the first holding portion and standing on both sides of the resistor, and a second part. The first part and the second part are short-circuited and electrically converged above the resistor, such that the transverse enclosed magnetic field area between the first part and the resistor is equal to the transverse enclosed magnetic field area between the second part and the resistor. This meets the standards of the new installed AC energy meter type evaluation outline, the CPA certification standard for active energy meters, and external power frequency magnetic field tests.

Description

Technical Field

[0001] This utility model relates to a new standard anti-magnetic field shunt and its power meter for use in power instruments, and particularly to a new standard anti-magnetic field shunt and its power meter applicable to the field of power transmission. Background Technology

[0002] In modern power systems, electricity meters are key devices for measuring electricity consumption, and their accuracy and stability are of paramount importance. With the development of smart grids and the emergence of various complex electromagnetic environments, higher demands are placed on the ability of electricity meters to resist external electromagnetic interference.

[0003] Currently, according to JJF 1245.1-2019 "Type Evaluation Outline for Installed AC Energy Meters", active energy meters must meet strict legal management, metrological, and technical requirements to ensure their measurement accuracy under different operating conditions. CPA certification, as a type approval certification for measuring instruments in China, is a mandatory requirement for energy meters to enter the market. It ensures that products comply with relevant national standards and that functions such as metering accuracy, data storage, and rate / period setting meet standards. These meters are widely used in charging piles, photovoltaic energy storage systems, and smart grids.

[0004] Meanwhile, the external power frequency magnetic field test is performed in accordance with standards such as GB / T 17215.211-2021 9.3.13 and GB / T 17215.321-2021 7.11. In actual operating environments, electricity meters are often subjected to various electromagnetic interferences, such as power frequency magnetic fields generated by substations, large motors, and communication base stations. These interferences can cause the shunt of traditional electricity meters to generate induced electromotive force and induced current, which are superimposed on the actual sampling current, leading to inaccurate sampling, affecting the accuracy of electricity metering, and causing metering disputes between users and power supply departments; in severe cases, it may also interfere with the normal operation of the electricity meter and damage the internal circuitry.

[0005] Although existing technologies have adopted measures such as reducing loop area, increasing magnetic field shielding, and moving away from magnetic field interference sources, they cannot fundamentally solve the problem. For example, in environments with strong interference, traditional shielding methods are ineffective in blocking magnetic fields, resulting in measurement errors still existing.

[0006] Therefore, it is urgent to develop a shunt for electricity meters that is resistant to all external electromagnetic interference in order to meet the growing demand for electricity metering and improve the performance of electricity meters in complex electromagnetic environments. Utility Model Content

[0007] The purpose of this utility model is to provide a new standard anti-magnetic field shunt and its power meter that can meet the new installation AC energy meter type evaluation outline standard, active energy meter CPA certification standard and external power frequency magnetic field test.

[0008] To achieve the above technical objectives, this utility model adopts the following technical approach:

[0009] A new standard anti-magnetic field shunt includes a plate shunt, wherein the plate shunt includes a current inlet, a resistor, and a current outlet connected in sequence.

[0010] The plate-shaped shunt is provided with a voltage terminal, a first sampling terminal, and a second sampling terminal in sequence along the direction of current flow. The first sampling terminal is located below the connection between the current inlet and the resistor, and the second sampling terminal is located above the connection between the current outlet and the resistor.

[0011] The voltage terminal is used to electrically connect a voltage connector, the first sampling terminal is used to electrically connect a first sampling connector, and the second sampling terminal is used to electrically connect a second sampling connector. The first sampling connector includes a first holding portion for electrically connecting the first sampling terminal, a first portion extending from the first holding portion and standing on both sides of the resistor, and a second portion. The first portion and the second portion are short-circuited and electrically merged above the resistor, so that the area of ​​the transverse enclosing magnetic field between the first portion and the resistor is equal to the area of ​​the transverse enclosing magnetic field between the second portion and the resistor.

[0012] As a further improvement of this utility model, the first sampling connector is formed by bending a metal sheet, including a first holding part for electrically holding the first sampling end, and the first part and the second part are respectively a first arm and a second arm that are parallel to the plane of the resistive body and extend vertically.

[0013] As a further improvement of this utility model, in the vertical direction, the longitudinal reclamation magnetic field area between the first arm, the resistor and the second sampling connector is equal to the longitudinal reclamation magnetic field area between the second arm, the resistor and the second sampling connector.

[0014] As a further improvement of this utility model, the first arm and the second arm are located on the front and rear sides of the resistor, and the first arm, the resistor, and the second arm are aligned in position or width in the front-rear direction.

[0015] As a further improvement of this utility model, the second sampling connector is provided with a second holding part for holding to the second sampling end and a main body part electrically connected to the second holding part. The main body part extends upward and is located in the middle of the plate-shaped splitter in the front-back direction.

[0016] As a further improvement of this utility model, a bent portion is provided between the second holding portion and the main body portion of the second sampling connector, and the bent portion is located above the second sampling end.

[0017] As a further improvement of this utility model, the second sampling connector is provided with a second holding part for holding the second sampling end and a main body part electrically connected to the second holding part. The main body part extends upward and is located above the resistor of the sheet shunt in the front-back direction. The main body part is aligned with the first arm and the second arm in the front-back direction.

[0018] As a further improvement of this utility model, a bending portion is provided between the second holding portion and the main body portion of the second sampling connector, and the bending portion is located on the left side of the second sampling end.

[0019] As a further improvement of this utility model, the lower end of the first arm and the lower end of the second arm are electrically connected through a sheet-like connecting part, and the first holding part is electrically connected to the first arm, the second arm, or the connecting part.

[0020] To achieve the above-mentioned technical objectives, the present invention may also employ the following technical methods:

[0021] An electrical meter includes an electrical meter housing and the aforementioned new standard anti-magnetic field shunt located within the electrical meter housing.

[0022] Compared to existing technologies, the first sampling connector of this utility model includes a first holding part for electrically connecting the first sampling end, a first part extending from the first holding part and standing on both sides of the resistor, and a second part. The first part and the second part are short-circuited and electrically merged above the resistor, so that the area of ​​the transverse enclosed magnetic field between the first part and the resistor is equal to the area of ​​the transverse enclosed magnetic field between the second part and the resistor. This configuration provides strong anti-interference capability and high reliability. Even when the new standard anti-magnetic field shunt is applied to extremely small operating currents, its meter accuracy can be minimized in the face of strong magnetic field interference. This allows the new standard anti-magnetic field shunt to meet the JJF 1245.1-2019 "Type Evaluation Outline for Installed AC Energy Meters" standard, the CPA certification standard for active energy meters, and pass the external power frequency magnetic field test. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the new standard anti-magnetic field shunt according to the first embodiment of this utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure from another angle.

[0025] Figure 3 This is a front view of the new standard anti-magnetic field shunt of the first embodiment of this utility model.

[0026] Figure 4This is a side view of the new standard anti-magnetic field shunt of the first embodiment of this utility model.

[0027] Figure 5 This is a top view of the new standard anti-magnetic field shunt of the first embodiment of this utility model.

[0028] Figure 6 This is an exploded view of the new standard anti-magnetic field shunt of the first embodiment of this utility model.

[0029] Figure 7 This is a three-dimensional structural diagram of the new standard anti-magnetic field shunt according to the second embodiment of this utility model.

[0030] Figure 8 yes Figure 7 A schematic diagram of the three-dimensional structure from another angle.

[0031] Figure 9 This is a side view of the new standard anti-magnetic field shunt according to the second embodiment of this utility model.

[0032] Figure 10 This is a top view of the new standard anti-magnetic field shunt of the second embodiment of this utility model.

[0033] Figure label:

[0034] Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0037] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] Please refer to Figures 1 to 10 As shown, it is a schematic structural diagram of the new standard anti-magnetic shunts 100 and 200 of the present utility model. The new standard anti-magnetic shunts 100 and 200 of the present utility model include a sheet-shaped shunt 1, and the sheet-shaped shunt 1 includes a current inflow end 11, a resistor body 12, and a current outflow end 13 that are electrically connected in sequence; see Figures 1 to 3 As shown, in the illustrated embodiment, the sheet-shaped shunt 1 is generally a sheet-shaped long strip extending left and right. In other embodiments of the present utility model, the sheet-shaped shunt may also be of other shapes.

[0041] See Figure 1 and Figure 3 As shown, the sheet-shaped shunt 1 is sequentially provided with a voltage end 111, a first sampling end 121, and a second sampling end 122 along the direction of the current flow ( Figure 1 in the figure is the direction from left to right). The first sampling end 121 is provided on the lower side of the connection between the current inflow end 11 and the resistor body 12, and the second sampling end 122 is provided on the upper side of the connection between the current outflow end 13 and the resistor body 12; the voltage end 111 protrudes upward from the current inflow end 11, and the first sampling end 121 protrudes downward from the connection between the current inflow end 11 and the resistor body 12 and further extends horizontally to facilitate holding the first sampling connection member 3; the second sampling end 122 protrudes upward from the connection between the current outflow end 13 and the resistor body 12. It should be noted that the "connection" means: taking the first sampling end 121 as an example, in different embodiments, the first sampling end 121 may be located at the current inflow end 11, or may be located at a position of the resistor body 12 close to the current inflow end 11, or may be partially located at the current inflow end 11 and partially located on the resistor body 12, all of which belong to the first sampling end 121 being provided on the lower side of the connection between the current inflow end 11 and the resistor body 12; similarly, the second sampling end 122 may be located at the current outflow end 13, or may be located at a position of the resistor body 12 close to the current outflow end 13, or may be partially located at the current outflow end 1,3 and partially located on the resistor body 12, all of which belong to the second sampling end 122 being provided on the upper side of the connection between the current outflow end 13 and the resistor body 12.

[0042] The voltage terminal 111 is electrically connected to the voltage connector 2, the first sampling terminal 121 is electrically connected to the first sampling connector 3, and the second sampling terminal 122 is electrically connected to the second sampling connector 4. The first sampling connector 3 includes a first holding part 311 electrically connected to the first sampling terminal 121, a first part extending from the holding part 311 and standing on both sides of the resistor 12, and a second part. The first part and the second part are short-circuited and electrically converge above the resistor 12, that is, the first part and the second part are short-circuited and do not make electrical contact with the resistor 12 below. In this way, when subjected to external magnetic field interference, the area of ​​the transverse enclosing magnetic field 301 between the first part and the resistor 12 is equal to the area of ​​the transverse enclosing magnetic field 302 between the second part and the resistor 12. With this configuration, the first sampling connector 3 is distributed in two directions from the first sampling terminal 121 on the front and rear sides of the resistor 12, and then short-circuited and converges above the resistor 12. Figure 4 For example, the area of ​​the transverse enclosing magnetic field 301 between the first part and the resistor 12 can be made equal to the area of ​​the transverse enclosing magnetic field 302 between the second part and the resistor 12. Thus, when the plate-shaped shunt 1 is disturbed by an external magnetic field in the left-right direction, the induced electromotive force generated in the area of ​​the transverse enclosing magnetic field 301 between the first part and the resistor 12 can cancel out the induced electromotive force generated in the area of ​​the transverse enclosing magnetic field 302 between the first part and the resistor 12. This ensures that the new standard anti-magnetic field shunts 100 and 200 meet the JJF 1245.1-2019 "Type Evaluation Outline for Installed AC Energy Meters" standard, the CPA certification standard for active energy meters, and pass the external power frequency magnetic field test: GB / T 17215.211-2021 (involving clause 9.3.13), GB / T The following standards apply: GB / T 17215.321-2021 (covering clause 7.11), GB / T 17215.211-2021 (covering clause 9.3.14), and GB / T 17215.211-2021 (covering clause 9.3.15). The core test requirements and performance parameters are as follows:

[0043] 1. External power frequency magnetic field (no load condition) test (400A / m magnetic induction intensity): Within 20 times the start-up time, the instrument test output should not generate more than one pulse.

[0044] Start-up time requirement (taking a 230V 5A 1000 constant single-phase energy meter as an example): Under 20mA conditions, the start-up time must be less than 1174 seconds.

[0045] 2. External power frequency magnetic field test (400A / m magnetic induction intensity), for Class 1 meters: the change must be less than 1.3%.

[0046] In summary, the new standard anti-magnetic field shunts 100 and 200 described in this utility model can meet the updated standards in the field of electricity meters and have stronger resistance to external magnetic field interference.

[0047] For details, please refer to Figures 1 to 6 As shown, this is a new standard anti-magnetic field shunt 100 according to the first embodiment of the present invention. The first sampling connector 3 is formed by bending and extending a metal sheet. Correspondingly, the voltage connector 2 and the second sampling connector 4 can also be configured as conductive sheets 21 and 41, respectively. The first sampling connector 3 includes a sheet-like holding part 311 for electrically holding the first sampling end 121, and a first arm 313 and a second arm 314 electrically connected to the holding part 311. The first arm 313 and the second arm 314 are connected by a sheet-like connecting part 312 located below the resistor 12 (i.e., not in contact with the resistor 12). The first arm 313 and the second arm 314 are located on the front and rear sides of the resistor 12 (i.e., not in contact with the resistor 12) and extend in the vertical direction, and are parallel to the plane where the resistor 12 is located. In this embodiment, the first part and the second part are the first arm 313 and the second arm 314, respectively. With this configuration, the first arm 313 and the second arm 314 can be located on the front and rear sides of the resistor 12 and can maintain a certain distance from the resistor 12. When subjected to external magnetic field interference, the area of ​​the transverse enclosing magnetic field 301 generated between the first arm 313 and the resistor 12 is equal to the area of ​​the transverse enclosing magnetic field 302 generated between the second arm 314 and the resistor 12, thereby canceling out the transverse electromagnetic interference. Furthermore, the area of ​​the longitudinal enclosing magnetic field 303 generated between the first arm 313 and the resistor 12 is equal to the area of ​​the longitudinal enclosing magnetic field 304 generated between the second arm 314 and the resistor 12, thereby canceling out the longitudinal electromagnetic interference. This configuration can more comprehensively cancel out electromagnetic interference from all directions and improve the anti-magnetic field capability.

[0048] The extended ends of the voltage connector 2, the first arm 313, the second arm 314, and the second sampling connector 4 are all formed into reduced plug-in ends 315 for better plugging into mounting circuit boards and other devices.

[0049] In the vertical direction, the area of ​​the longitudinal enclosing magnetic field 303 between the first arm 313, the resistor 12, and the second sampling connector 4 is equal to the area of ​​the longitudinal enclosing magnetic field 304 between the second arm 314, the resistor 12, and the second sampling connector 4. This arrangement can better improve the ability to resist omnidirectional electromagnetic interference. The first arm 313, the resistor 12, and the second arm 314 are aligned in the front-back direction. That is, there is no requirement for the width of the first arm 313 and the second arm 314, but their positions must correspond. This arrangement can further improve the anti-electromagnetic interference capability.

[0050] Preferably, the widths of the first arm 313, the resistor 12, and the second arm 314 correspond to each other horizontally. This allows the area of ​​the longitudinal enclosing magnetic field 303 between the first arm 313, the resistor 12, and the second sampling end 122 to be equal to the area of ​​the longitudinal enclosing magnetic field 304 between the second arm 314, the resistor 12, and the second sampling end 122. This arrangement improves the ability to withstand omnidirectional electromagnetic interference.

[0051] According to the structural layout requirements, the first holding part 311 is connected to the first arm part 313, the second arm part 314 or the connecting part 312. In the figure, the first holding part 311 is connected to the first arm part 313, which facilitates the electrical connection between the first holding part 311 and the first sampling end 121, as well as the position positioning between the first arm part 313, the second arm part 314 and the resistor 12.

[0052] In the first embodiment, the second sampling connector 4 is provided with a second holding portion 410 for holding to the second sampling end 122 and a main body portion 412 electrically connected to the second holding portion 410. The main body portion 412 extends upward and is located in the middle of the plate-shaped shunt 1 in the front-rear direction. Thus, when subjected to external magnetic field interference, the reference... Figure 4 As shown, the area of ​​the transverse reclamation magnetic field 301 generated between the first arm 313, the resistor 12, and the second sampling connector 4 is equal to the area of ​​the transverse reclamation magnetic field 302 generated between the second arm 314, the resistor 12, and the second sampling connector 4, thereby facilitating the mutual cancellation of the induced electromotive force; (Ref) Figure 5 As shown, the area of ​​the longitudinal reclamation magnetic field 303 generated between the first arm 313, the resistor 12 and the second sampling connector 4 is equal to the area of ​​the longitudinal reclamation magnetic field 304 generated between the second arm 314, the resistor 12 and the second sampling connector 4, which helps to cancel out the induced electromotive force generated by each other. In this way, it can achieve all-round resistance to external magnetic field interference.

[0053] Specifically, a bent portion 411 is provided between the second holding portion 410 and the main body portion 412 of the second sampling connector 4. The bent portion 411 is located above and closely attached to the second sampling end 122. This facilitates making the distance between the main body portion 412 and the first arm portion 313 and the second arm portion 314 equal.

[0054] Please refer to Figures 7 to 10As shown, this is a new standard anti-magnetic field shunt 200 according to the second embodiment of the present invention. The difference from the first embodiment includes: a bent portion 411' is provided between the second holding portion 410' of the second sampling connector 4' and the main body portion 412'. The bent portion 411' is located on the left side of the second sampling end 122, which facilitates equidistant positioning of the main body portion 412' with the first arm portion 313 and the second arm portion 314. The main body portion 412' extends upward and is positioned above the resistor 12 of the shunt 1 in the front-back direction, and is aligned with the first arm portion 313 and the second arm portion 314 in the front-back direction. With this configuration, when subjected to external magnetic field interference, the reference... Figure 9 As shown, the area of ​​the transverse reclamation magnetic field 301 generated between the first arm 313, the resistor 12, and the second sampling connector 4' is equal to the area of ​​the transverse reclamation magnetic field 302 generated between the second arm 314, the resistor 12, and the second sampling connector 4', thereby facilitating the mutual cancellation of the induced electromotive force; (Ref) Figure 10 As shown, the area of ​​the longitudinal reclamation magnetic field 303 generated between the first arm 313, the resistor 12 and the second sampling connector 4' is equal to the area of ​​the longitudinal reclamation magnetic field 304 generated between the second arm 314, the resistor 12 and the second sampling connector 4', which helps to cancel out the induced electromotive force generated by each other. In this way, it can achieve all-round resistance to external magnetic field interference.

[0055] This utility model also protects an electric meter, including a casing and the aforementioned new standard anti-magnetic field shunts 100 and 200 located within the casing. With this configuration, the electric meter can meet the latest JJF1245.1-2019 "Type Evaluation Outline for Installed AC Energy Meters" standard and the CPA certification standard for active energy meters. It can also successfully pass external power frequency magnetic field tests: GB / T 17215.211-2021 (related to clause 9.3.13), GB / T 17215.321-2021 (related to clause 7.11), external power frequency magnetic field (no-load condition) test: GB / T 17215.211-2021 (related to clause 9.3.14), and external power frequency magnetic field interference test: GB / T 17215.211-2021 (related to clause 9.3.15), better meeting users' safety and accuracy requirements and giving the electric meter a core competitive advantage in the market.

[0056] The second sampling connectors 4 and 4' include second holding portions 410 and 410' fixed to the second sampling end 122 and main body portions 412 and 412' electrically connected to the second holding portions 410 and 410'. The main body portions 412 and 412' are located in the middle of the sheet shunt 1 in the front-back direction; or the main body portion 412' is further located in the middle above the resistor 12 of the sheet shunt 1 in the front-back direction, and the main body portion 412' is aligned with the first arm portion 313 and the second arm portion 314 in the front-back direction. This arrangement enables the new standard anti-magnetic field shunts 100 and 200 to have better all-round anti-electromagnetic interference capability.

[0057] In this embodiment, the resistor 12 is a manganin resistor 12. This achieves excellent sampling accuracy. Of course, in other embodiments of this invention, the resistor 12 can also be other types of resistors, all of which are within the protection scope of this invention.

[0058] Unless otherwise defined, 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 pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0059] The directional terms used in the various technical features described in the above embodiments, such as front, back, left, right, up, and down, are used only for the convenience of describing and understanding the various technical features, and do not constitute a limitation on specific directions in the actual use of the technical solution.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A new standard anti-magnetic field shunt, characterized in that: The shunt includes a sheet-like shunt, which comprises a current inlet, a resistor, and a current outlet connected in sequence. The plate-shaped shunt is provided with a voltage terminal, a first sampling terminal, and a second sampling terminal in sequence along the direction of current flow. The first sampling terminal is located below the connection between the current inlet and the resistor, and the second sampling terminal is located above the connection between the current outlet and the resistor. The voltage terminal is used to electrically connect a voltage connector, the first sampling terminal is used to electrically connect a first sampling connector, and the second sampling terminal is used to electrically connect a second sampling connector. The first sampling connector includes a first holding portion for electrically connecting the first sampling terminal, a first portion extending from the first holding portion and standing on both sides of the resistor, and a second portion. The first portion and the second portion are short-circuited and electrically merged above the resistor, so that the area of ​​the transverse enclosing magnetic field between the first portion and the resistor is equal to the area of ​​the transverse enclosing magnetic field between the second portion and the resistor.

2. The new standard anti-magnetic field shunt according to claim 1, characterized in that: The first sampling connector is formed by bending a metal sheet and includes a first holding part for electrically holding the first sampling end. The first part and the second part are respectively a first arm and a second arm that are parallel to the plane of the resistor and extend vertically.

3. A new standard anti-magnetic field shunt according to claim 2, characterized in that: In the vertical direction, the longitudinal reclamation magnetic field area between the first arm, the resistor, and the second sampling connector is equal to the longitudinal reclamation magnetic field area between the second arm, the resistor, and the second sampling connector.

4. A new standard anti-magnetic field shunt according to claim 3, characterized in that: The first arm and the second arm are located on the front and rear sides of the resistor, and the first arm, the resistor, and the second arm are aligned in position or width in the front-rear direction.

5. A new standard anti-magnetic field shunt according to claim 2, characterized in that: The second sampling connector has a second holding part for holding to the second sampling end and a main body part electrically connected to the second holding part. The main body part extends upward and is located in the middle above the plate-shaped splitter in the front-back direction.

6. A new standard anti-magnetic field shunt according to claim 5, characterized in that: A bend is provided between the second holding part and the main body of the second sampling connector, and the bend is located above the second sampling end.

7. A new standard anti-magnetic field shunt according to claim 5, characterized in that: The second sampling connector has a second holding part for holding to the second sampling end and a main body part electrically connected to the second holding part. The main body part extends upward and is located above the resistor of the sheet shunt in the front-back direction. The main body part is aligned with the first arm and the second arm in the front-back direction.

8. A new standard anti-magnetic field shunt according to claim 7, characterized in that: A bending portion is provided between the second holding portion and the main body portion of the second sampling connector, and the bending portion is located on the left side of the second sampling end.

9. A new standard anti-magnetic field shunt according to claim 2, characterized in that: The lower end of the first arm is electrically connected to the lower end of the second arm through a sheet-like connecting part, and the first holding part is electrically connected to the first arm, the second arm, or the connecting part.

10. An electrical meter, characterized in that: It includes a power meter housing and a new standard anti-magnetic field shunt located within the power meter housing according to any one of claims 1 to 9.

Images