A smart energy meter

Abstract

A smart electric energy meter includes a housing and a control unit, wherein a housing is provided inside the housing, wherein the housing is provided with a plurality of expansion assembly positions for installing expansion function modules, wherein the expansion assembly position is provided with a communication interface connected to the control unit; at least one expansion assembly position is a compatible assembly position, which is used to install the expansion function module or a circuit breaker, wherein the compatible assembly position is provided with a communication interface and a first wiring interface and a second wiring interface connected in series to a main circuit of the circuit. A smart electric energy meter of the present invention has an accommodation space provided inside the smart electric energy meter, wherein the expansion function module is provided in the accommodation space, and different expansion function modules can be selected according to actual needs, so that the smart electric energy meter forms a multi-core electric energy meter, and at the same time, the accommodation space can be compatible with the circuit breaker, has high expansibility, a wide range of applications, and obvious cost advantages, improves space utilization, and reduces interference of the external environment on the communication connection.

Description

Technical Field

[0001] The present invention relates to the field of electric energy and electricity metering, and in particular to an intelligent electric energy meter. Background Art

[0002] The electric energy meter is an important component of the power grid and has the closest relationship with users. Due to the requirements of interconnection of smart grids, users' expectations for electric energy meters are constantly increasing, and smart electric energy meters have emerged. Smart electric energy meters are one of the basic devices for smart grid data collection. They undertake the tasks of collecting, measuring and transmitting original electric energy data. They are the basis for realizing information integration, analysis optimization and information display, making the existing dual-core smart electric energy no longer able to meet application requirements. At the same time, existing electric energy meters are usually combined with external devices, such as circuit breakers, which causes the electric energy meters and supporting equipment to occupy a large space. In addition, external devices are easily affected by the environment, which causes certain interference to the electric energy meter and the information transmission between devices. Summary of the invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a smart electric energy meter.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A smart electric energy meter comprises a shell and a control unit arranged in the shell, wherein a accommodating space is arranged inside the shell, wherein a plurality of extended assembly positions for installing extended function modules are arranged in the accommodating space, wherein the extended assembly positions are provided with a communication interface connected to the control unit; at least one extended assembly position is a compatible assembly position for installing the extended function module or a circuit breaker, wherein the compatible assembly position is provided with a communication interface and a first wiring interface and a second wiring interface connected in series on a main circuit loop.

[0006] Preferably, the compatible assembly position is provided with a wiring slot, and the first wiring interface and the second wiring interface are arranged in the wiring slot.

[0007] Preferably, a circuit breaker is installed in the compatible assembly position, and the circuit breaker is plugged into and matched with the communication interface of the compatible assembly position and the first wiring interface and the second wiring interface. The circuit breaker realizes communication connection with the control unit through the communication interface, and is connected to the main circuit loop by plugging and matching with the first wiring interface and the second wiring interface.

[0008] Preferably, a short-circuit module and an extended function module are installed in the compatible assembly position; the short-circuit module is installed in the wiring slot and plugged in with the first wiring interface and the second wiring interface to electrically connect the first wiring interface and the second wiring interface; the short-circuit module matches the size of the wiring slot, the extended function module plugs in with the communication interface, and the bottom surface of the extended function module fits with the top surface of the short-circuit module.

[0009] Preferably, at least two side panels are provided in the accommodating space, and the side panels are arranged around one side of the accommodating space to form a connecting groove, and the communication interfaces are arranged in the connecting groove; the communication interface and the wiring groove are respectively located on two opposite sides of the accommodating space, and the bottom surface of the communication interface and the wiring groove are not on the same horizontal plane, and the communication interface is higher than the bottom surface of the wiring groove.

[0010] Preferably, a wiring portion is provided on one side of the housing, the wiring portion includes at least one pair of incoming terminals and outgoing terminals, the at least one pair of incoming terminals and outgoing terminals are each connected to a conductive busbar to form a first wiring interface and a second wiring interface, the two conductor busbars extend along the bottom surface of the wiring slot and form a bending portion perpendicular to the bottom surface of the wiring slot at their ends; the communication interface is provided with a pin row, and the pin row is parallel to the bending portion.

[0011] Preferably, the bottom of the circuit breaker is in the shape of steps of varying heights, and two wiring sockets are arranged at the bottom of the lower side of the circuit breaker, and a wiring terminal is arranged in each wiring socket, and the two wiring terminals are respectively connected to the first wiring interface and the second wiring interface for plugging and unplugging, and a communication socket is arranged at the bottom of the higher side of the circuit breaker.

[0012] Preferably, a short-circuit module is installed in the compatible assembly position, and two wiring sockets are provided at the bottom of the short-circuit module. A wiring terminal is installed in each wiring socket, and the two wiring terminals are respectively plugged and connected to the first wiring interface and the second wiring interface, and the two wiring terminals are electrically connected.

[0013] Preferably, the control unit includes a metering core module and a management core module connected to each other, the metering core module is arranged along the inner bottom surface of the shell, the management core module is arranged on the metering core module, and the accommodating space is located on one side of the management core module.

[0014] Preferably, it further comprises a human-machine interaction interface, which is arranged on the upper part of the shell; the shell comprises a cover body, which can close the accommodating space to keep the exterior of the shell flat.

[0015] A smart electric energy meter of the present invention has a storage space arranged inside the smart electric energy meter, an extended function module is arranged in the storage space, and different extended function modules can be selected according to actual needs, so that the smart electric energy meter forms a multi-core electric energy meter. At the same time, the storage space can be compatible with circuit breakers, has high scalability, a wide range of applications, and obvious cost advantages, which not only improves space utilization, but also reduces interference of the external environment on communication connections.

[0016] In addition, the wiring part arranged in the accommodating space can be plugged and matched with the short-circuit module, and the short-circuit module is connected to the wiring part to ensure the safety of assembling the extended function module.

[0017] In addition, the accommodating space is closed by a cover to prevent the external environment from interfering with the extended function module inside the smart meter. At the same time, the cover keeps the exterior of the smart meter flat to avoid excessive space occupation due to the uneven outer shell. In addition, a human-computer interaction interface corresponding to the management core module is provided on the outer shell to facilitate operation and observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a smart electric energy meter of the present invention;

[0019] Figure 2 This is a front view of a smart electric energy meter of the present invention (excluding the cover);

[0020] Figure 3 This is a front view of a smart electric energy meter of the present invention (excluding the cover and the extended function module);

[0021] Figure 4 It is a front view of a smart electric energy meter of the present invention (including a circuit breaker);

[0022] Figure 5 yes Figure 4 Schematic diagram of the decomposition of the (excluding the shell);

[0023] Figure 6 It is a structural schematic diagram of a circuit breaker in a smart electric energy meter of the present invention (circuit breaker pole module);

[0024] Figure 7 It is a structural schematic diagram of a circuit breaker in a smart electric energy meter of the present invention (control electrode module);

[0025] Figure 8 It is a schematic diagram of a smart electric energy meter of the present invention (including only the extended function module);

[0026] Fig. 9 This is a structural diagram of a smart electric energy meter of the present invention (expanded function module and short-circuit module)

[0027] Fig.10 It is a structural schematic diagram of a short-circuit module in a smart electric energy meter of the present invention;

[0028] Fig.11 It is a schematic diagram of a compatible assembly displacement output circuit breaker in a smart electric energy meter of the present invention;

[0029] Fig.12 It is a schematic diagram of a short-circuit module installed in a compatible assembly position of a smart electric energy meter of the present invention;

[0030] Fig.13The present invention is a schematic diagram of a smart electric energy meter in which a short-circuit module and a function expansion module are installed in a compatible assembly position. DETAILED DESCRIPTION

[0031] The following is combined with Figures 1 to 13 The given embodiments further illustrate the specific implementation of a smart energy meter and a smart energy meter system of the present invention. The smart energy meter and a smart energy meter system of the present invention are not limited to the description of the following embodiments.

[0032] A smart electric energy meter comprises a shell 1 and a control unit arranged in the shell 1, wherein a receiving space 11 is arranged inside the shell 1, wherein the receiving space 11 is provided with a plurality of extended assembly positions for installing extended function modules 5, wherein the extended assembly positions are provided with a communication interface 41 connected to the control unit; at least one extended assembly position is a compatible assembly position for installing the extended function module 5 or a circuit breaker 51, wherein the compatible assembly position is provided with a communication interface 41 and a first wiring interface 21 and a second wiring interface 22 connected in series on a main circuit of the circuit.

[0033] A smart electric energy meter of the present invention is provided with a storage space 11 inside the smart electric energy meter, and an extended function module 5 is arranged in the storage space 11. Different extended function modules 5 can be selected according to actual needs, so that the smart electric energy meter forms a multi-core electric energy meter. At the same time, the storage space 11 can be compatible with a circuit breaker 51, has high scalability, a wide range of applications, and obvious cost advantages. It not only improves space utilization, but also reduces the interference of the external environment on the communication connection.

[0034] Combination Figure 1-13 An embodiment of an intelligent electric energy meter is provided, the intelligent electric energy meter comprises a housing 1 and a control unit arranged in the housing 1, a receiving space 11 is arranged inside the housing 1, a plurality of extended assembly positions for installing extended function modules 5 are arranged in the receiving space 11, a plurality of extended function modules 5 are arranged in parallel in the receiving space 11, a communication interface 41 connected to the control unit is arranged in the extended assembly position; at least one extended assembly position is a compatible assembly position for compatible installation of the extended function module 5 or a circuit breaker 51, a communication interface 41 and a first wiring interface 21 and a second wiring interface 22 connected in series on a main circuit of the circuit are arranged in the compatible assembly position, the extended function module 5 is plugged in and matched with the communication interface 41 of the compatible assembly position to realize communication connection with the control unit, the circuit breaker 51 is plugged in and matched with the communication interface 41 of the compatible assembly position and the first wiring interface 21 and the second wiring interface 22, the circuit breaker 51 realizes communication connection with the control unit through the communication interface 41, and is connected to the main circuit of the circuit by plugging and matching with the first wiring interface 21 and the second wiring interface 22, so as to protect the main circuit of the intelligent electric energy meter.

[0035] The extended function module 5 can be an existing meter extension module such as a non-intrusive load sensing module, a multi-meter collection module, and an orderly charging module, which is a prior art in the field and will not be described in detail. The several extended assembly positions can be one or more, and the compatible assembly positions can be one or more. A wiring part 2 is provided on one side of the smart electric energy meter, and the wiring part 2 includes at least one pair of incoming terminals and outgoing terminals for connecting to external wires, and the first wiring interface 21 and the second wiring interface 22 are respectively connected to the at least one pair of incoming terminals and outgoing terminals. The wiring part 2 of the smart electric energy meter in this embodiment includes two pairs of wiring terminals arranged side by side, and the figure shows four wiring terminals arranged side by side, of which the first and third are both incoming terminals, and the second and fourth are both outgoing terminals. The first wiring interface 21 and the second wiring interface 22 are respectively connected to the first incoming terminal and the second outgoing terminal, and the circuit breaker 51 is connected in series between the first wiring interface 21 and the second wiring interface 22. The main circuit of the electric energy meter is connected by closing the contacts of the circuit breaker 51 to realize the power supply of the electric meter. In addition, the incoming terminal and the outgoing terminal of this embodiment are both arranged on one side of the smart electric energy meter. The incoming terminal and the outgoing terminal may also be arranged on both sides of the smart electric energy meter as required, which all falls within the protection scope of the present invention.

[0036] The compatible assembly position is provided with a wiring slot, and the first wiring interface 21 and the second wiring interface 22 are provided in the wiring slot. The first wiring interface 21 and the second wiring interface 22 are formed by bending a conductive busbar in one piece, one end of the conductive busbar is connected to the incoming terminal or the outgoing terminal, and the other end is bent perpendicular to the bottom surface of the wiring slot for plugging and matching. When installed, it is vertically plugged into the compatible assembly position along a direction perpendicular to the bottom surface of the accommodating space 11, and plugged and matched with the communication interface 41, the first wiring interface 21 and the second wiring interface 22. Figure 5 As shown, the first wiring interface 21 and the second wiring interface 22 have different extension lengths, so that the terminal bending portion of the first wiring interface is closer to the wiring portion 2 , and the terminal bending portion of the second wiring interface 22 is closer to the communication interface 41 .

[0037] Preferably, at least two side panels are further provided in the accommodating space 11, and the side panels are arranged on one side of the accommodating space 11 to form a connecting groove 13, and the communication interface 41 is provided in the connecting groove 13, preferably as shown in FIG. Figure 4 , 8As shown, the two side panels are relatively arranged on one side of the accommodating space 11, and the space between the two side panels serves as a connecting groove 13. All communication interfaces 41 are arranged in the connecting groove 13, and the communication interface 41 is a pin row vertically arranged on the bottom surface of the connecting groove 13. The connecting groove 13 and the wiring groove are respectively located on two opposite sides of the accommodating space 11, wherein the bottom surface of the wiring groove and the communication interface 41 are not on the same horizontal plane, specifically, the bottom surface of the wiring groove is lower than the bottom surface of the connecting groove 13, and the communication interface 41 is higher than the bottom surface of the wiring groove, so that the bending portion at the end of the conductive busbar will not be higher than the communication interface 41, and the structure in which the pin row and the bending portion of the communication interface 41 remain parallel is conducive to connection and assembly.

[0038] The compatible assembly position can be used to install the circuit breaker 51 or the extended function module 5. Figure 4 , 5 As shown in FIG. 11 , a circuit breaker 51 is installed in the compatible assembly position, and the circuit breaker 51 is plugged in and matched with the communication interface 41 and the first wiring interface 21 and the second wiring interface 22 of the compatible assembly position. The circuit breaker 51 realizes communication connection with the control unit through the communication interface 41, and is connected to the main circuit of the circuit by plugging in and matching with the first wiring interface 21 and the second wiring interface 22.

[0039] The circuit breaker 51 that can be inserted into the compatible assembly position is smaller in size and occupies less space, such as Figure 5-7 As shown, the bottom of the circuit breaker 51 is in a step shape with different heights. Two wiring sockets 54 are arranged at the bottom of the lower side of the circuit breaker 51. A wiring terminal 511 is arranged in each wiring socket 54. The wiring terminals 511 correspond to the conductive busbar plug-in connection of the first wiring interface 21 and the second wiring interface 22 respectively. A communication socket 53 is arranged at the bottom of the higher side of the circuit breaker 51. A pin header matching with the pin header is arranged in the communication socket 53. When the circuit breaker 51 is assembled in the compatible assembly position, the bottom of the lower side of the circuit breaker 51 is in contact with the bottom surface of the wiring slot, and the bottom of the higher side is in contact with the bottom surface of the connection slot 14.

[0040] The circuit breaker 51 includes a circuit breaker pole module and a control pole module. Figure 6As shown, the circuit breaker pole module includes a pair of wiring terminals 511, a built-in handle mechanism 512, an operating mechanism 513, a contact mechanism, a short-circuit protection mechanism 517 and an arc extinguishing chamber 516, wherein the pair of wiring terminals 511 are respectively assembled in the two wiring sockets 54 at the bottom of the circuit breaker 51, and are respectively connected to the first wiring interface 21 and the second wiring interface 22. Preferably, the wiring terminals 511 are elastic clamping structures, which are convenient for plugging and unplugging with the conductive busbar; the handle mechanism 512 and the operating mechanism 513 are arranged on the upper part of the circuit breaker pole module, The handle mechanism 512 is linked to the operating mechanism 513, the moving contact 514 in the contact mechanism is connected to the operating mechanism 513, the static contact 515 of the contact mechanism is fixedly arranged in the middle of the circuit breaker pole module for cooperating with the moving contact 514, the arc extinguishing chamber 516 is arranged at the lower part of the circuit breaker pole module, a pair of wiring terminals 511 are respectively located on both sides of the arc extinguishing chamber 516, and the short-circuit protection mechanism 517 is arranged between the handle mechanism 512 and the arc extinguishing chamber 516. When a short-circuit fault occurs, the short-circuit protection mechanism 517 realizes opening by triggering the operating mechanism 513.

[0041] Preferably, the wiring terminal 511 arranged in the wiring socket 54 includes an elastic clamping portion and a connecting portion, the elastic clamping portion has two opposite clamping arms, one ends of the two clamping arms are connected, and a clamping gap for clamping the main line conductor is formed between the two clamping arms, and the opening of the clamping gap corresponds to the wiring socket 54. A connecting portion is provided at the portion of the wiring terminal 511 away from the opening of the clamping gap, and the connecting portion can be extended into the circuit breaker 51 to be electrically connected to the moving contact 514 or the short-circuit protection mechanism 517 of the circuit breaker 51.

[0042] A specific structure of a wiring terminal 511 is provided, wherein the elastic clamping portion and the connecting portion are formed by an elastic metal plate, the middle portion of the elastic metal plate is bent to form a U-shaped body, and the two opposite plate surfaces are preferably arranged along the inner wall of the wiring socket 54 as two clamping arms, and the middle portions of the two clamping arms are bent to form the thinnest part of the clamping gap, which is conducive to stably clamping the wire. A notch is provided on one side of the connection of the two clamping arms, and one side edge of the notch extends in a direction away from the clamping gap to form a connecting portion and extends obliquely, so that it can extend into the circuit breaker 51 and be electrically connected to the moving contact 514 or the short-circuit protection mechanism 517 of the circuit breaker 51.

[0043] like Figure 7As shown, the control pole module includes a main control unit and a driving structure driven by the main control unit, the driving structure can be linked with the handle mechanism 512, the main control unit drives the handle mechanism 512 to operate the circuit breaker pole module to perform opening and closing actions by driving the driving structure, the driving structure preferably includes a motor 518, a worm and a gear set 519, and the circuit breaker pole module is operated to perform opening and closing actions under the cooperation of the motor 518, the worm and the gear set 519. Among them, the main control unit is connected to the communication interface 41 through the communication socket 53, which is used to feedback the operating status of the circuit breaker 51 to the control unit and receive the opening and closing commands from the control unit. The main control unit includes a circuit board and a controller arranged on the circuit board, and the controller is preferably a microcontroller. The driving structure includes a motor 518, a worm and a gear set 519. The motor 518 is meshed with the gear set 519 through the worm. The controller can drive the motor 518 to rotate in the forward direction (closing direction) or reverse direction (opening direction). The gear set 519 at least includes a handle gear, and the gear set includes a plurality of meshed gears, wherein the handle gear is coaxially installed with the handle mechanism 512, and an opening drive part and a closing drive part are provided on the handle gear. When the motor 518 rotates forward, the handle gear rotates and pushes the linkage connecting rod of the linkage connecting handle mechanism 512 and mechanism 513 through the closing drive part, so that the operating mechanism 513 and the moving contact 514 move in the closing direction. When the motor 518 rotates reversely, the handle gear rotates and pushes the linkage connecting rod through the opening drive part, so that the tripping buckle of the operating mechanism 513 and the buckle mechanism of the lock buckle are unlocked, and the operating mechanism 513 drives the moving contact 514 to move in the opening direction.

[0044] When installing the extended function module 5, Fig. 9 , 12As shown, it is preferably used in combination with a short-circuit module 52. The short-circuit module 52 and the extended function module 5 are installed in the compatible assembly position. The short-circuit module 52 is installed in the wiring slot and plugs in with the first wiring interface 21 and the second wiring interface 22 to electrically connect the first wiring interface 21 and the second wiring interface 22. The short-circuit module 52 matches the size of the wiring slot to fill the wiring slot, and the extended function module 5 is plugged in with the communication interface 41, and the bottom surface of the extended function module 5 fits the top surface of the short-circuit module 52. Of course, as a modified embodiment, the short-circuit module 52 may not be used, but the first wiring interface 21 and the second wiring interface 22 may be directly connected through a wire; or, the size of the short-circuit module 52 does not completely match the wiring slot, which all belong to the protection scope of the present invention. It should be noted that when the circuit breaker 51 is not set in the accommodating space 11, after the circuit breaker 51 is replaced by the short-circuit module 52 and the extended function module 5, when it is necessary to provide protection for the smart electric energy meter, another external circuit breaker can be set outside the smart electric energy meter, and the smart electric energy meter is connected to the external circuit breaker. The smart electric energy meter can be compatible with internal and external circuit breakers, has high scalability, a wide range of applications, and obvious cost advantages.

[0045] Specifically, two wiring sockets 54 identical to the bottom of the circuit breaker 51 are provided at the bottom of the short-circuit module 52, and a wiring terminal 511 is provided in each wiring socket 54, and the two wiring terminals are electrically connected. The wiring terminals 511 provided on the short-circuit module 52 are preferably identical to the wiring terminals 511 of the circuit breaker 51, and are both wiring terminals 511 of an elastic clamping structure. The two wiring terminals 511 are electrically connected through conductors, and the two wiring terminals 511 cooperate with the first wiring interface 21 and the second wiring interface 22 respectively to short-circuit the first wiring interface 21 and the second wiring interface 22, thereby connecting the main circuit of the circuit. After the short-circuit module 52 is plugged in, the top surface of the short-circuit module 52 is flush with the bottom surface of the connection slot 13, and then the extended function module 5 is plugged into the communication interface 41, and the bottom surface of the extended function module 5 is in contact with the top surface of the short-circuit module 52.

[0046] In this embodiment, the control unit is similar to the existing smart electric energy meter, and generally includes a metering core module 3 and a management core module 4, wherein the metering core module 3 is arranged along the inner bottom surface of the outer shell 1, and the management core module 4 is arranged on the metering core module 3 and is located on the side opposite to the wiring part 2. A accommodating space 11 for assembling an extended function module is formed between the management core module 4 and the wiring part 2, and the signal end of the management core module 4 is arranged in the connecting groove 13 as the communication interface 41 of the control unit, which is used to connect with the extended function module 5 and / or the circuit breaker 51.

[0047] like Figure 11-13As shown, the housing 1 also includes a cover body 12 capable of enclosing the accommodating space 11 to prevent the external environment from interfering with the internal equipment of the smart electric energy meter. At the same time, the cover body 12 keeps the exterior of the smart electric energy meter flat to avoid excessive space occupation due to the unevenness of the housing 1. In addition, the smart electric energy meter also includes a human-computer interaction interface 6, which is arranged on the upper part of the housing 1 and corresponds to the management core module 4 of the control unit. At this time, the human-computer interaction interface 6 is located on the housing 1 on one side of the cover body 12. The management core module 4 can be operated and the operating status of the extended function module 5 and the smart electric energy meter can be observed through the human-computer interaction interface 6.

[0048] A smart meter system includes the smart energy meter as described above and a circuit breaker 51, wherein the circuit breaker 51 is plugged into the accommodation space 11 to control the on / off connection between the smart energy meter and the main circuit, and the circuit breaker 51 is communicatively connected to a control unit to receive opening and closing control commands and feedback information on the operating status of the circuit breaker 51. In a smart meter system of the present invention, the circuit breaker 51 is plugged into the accommodation space 11 of the smart energy meter, and the circuit breaker 51 is communicatively connected to the control unit to receive opening and closing control commands and feedback information on the operating status of the circuit breaker, so as to provide protection for the smart energy meter.

[0049] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A smart electric energy meter, comprising a housing (1) and a control unit arranged in the housing (1), wherein a receiving space (11) is arranged inside the housing (1), wherein a plurality of extended assembly positions for installing extended function modules (5) are arranged in the accommodation space (11), and wherein a communication interface (41) connected to the control unit is arranged in the extended assembly position; characterized in that: At least one extended assembly position is a compatible assembly position for installing an extended function module (5) or a circuit breaker (51), wherein the compatible assembly position is provided with a communication interface (41) and a first wiring interface (21) and a second wiring interface (22) connected in series on a main circuit loop; When the extended function module (5) is installed in the compatible assembly position, the extended function module (5) is connected to the communication interface (41); when the circuit breaker (51) is installed in the compatible assembly position, the circuit breaker (51) is connected to the communication interface (41), the first wiring interface (21) and the second wiring interface (22).

2. The smart electric energy meter according to claim 1, characterized in that: The compatible assembly position is provided with a wiring slot, and the first wiring interface (21) and the second wiring interface (22) are arranged in the wiring slot.

3. A smart electric energy meter according to claim 1 or 2, characterized in that: A circuit breaker (51) is installed in the compatible assembly position, and the circuit breaker (51) is plugged and matched with the communication interface (41) of the compatible assembly position and the first wiring interface (21) and the second wiring interface (22). The circuit breaker (51) realizes communication connection with the control unit through the communication interface (41), and is connected to the main circuit of the circuit by plugging and matching with the first wiring interface (21) and the second wiring interface (22).

4. The smart electric energy meter according to claim 2, characterized in that: A short-circuit module (52) and an extended function module (5) are installed in the compatible assembly position; the short-circuit module (52) is installed in the wiring slot and plugged into and matched with the first wiring interface (21) and the second wiring interface (22) to electrically connect the first wiring interface (21) and the second wiring interface (22); the short-circuit module (52) matches the size of the wiring slot; the extended function module (5) plugs into and matches the communication interface (41); and the bottom surface of the extended function module (5) fits the top surface of the short-circuit module (52).

5. The smart electric energy meter according to claim 2, characterized in that: At least two side panels are provided in the accommodating space (11), the side panels surround a connecting groove (13) on one side of the accommodating space (11), and the communication interface (41) is arranged in the connecting groove (13); the communication interface (41) and the wiring groove are respectively located on two opposite sides of the accommodating space (11), the communication interface (41) and the bottom surface of the wiring groove are not on the same horizontal plane, and the communication interface (41) is higher than the bottom surface of the wiring groove.

6. A smart electric energy meter according to claim 2 or 5, characterized in that: A wiring portion (2) is provided on one side of the housing (1), the wiring portion (2) comprising at least one pair of incoming terminals and outgoing terminals, the at least one pair of incoming terminals and outgoing terminals are each connected to a conductive busbar to form a first wiring interface (21) and a second wiring interface (22), the two conductive busbars extending along the bottom surface of a wiring slot and forming a bent portion perpendicular to the bottom surface of the wiring slot at their ends; the communication interface (41) is provided with a pin row, the pin row being parallel to the bent portion.

7. The smart electric energy meter according to claim 3, characterized in that: The bottom of the circuit breaker (51) is in the shape of a step of varying heights. Two wiring sockets (54) are arranged at the bottom of the lower side of the circuit breaker (51). A wiring terminal (511) is arranged in each wiring socket (54). The two wiring terminals (511) are respectively connected to the first wiring interface (21) and the second wiring interface (22) by plugging and unplugging. A communication socket (53) is arranged at the bottom of the higher side of the circuit breaker (51).

8. A smart electric energy meter according to claim 1, 2 or 4, characterized in that: A short-circuit module (52) is installed in the compatible assembly position, and two wiring sockets (54) are provided at the bottom of the short-circuit module (52). A wiring terminal (511) is installed in each wiring socket (54), and the two wiring terminals (511) are plug-in connected to the first wiring interface (21) and the second wiring interface (22) respectively, and the two wiring terminals (511) are electrically connected.

9. The smart electric energy meter according to claim 1, characterized in that: The control unit comprises a metering core module (3) and a management core module (4) which are connected to each other, wherein the metering core module (3) is arranged along the inner bottom surface of the housing (1), the management core module (4) is arranged on the metering core module (3), and the accommodating space (11) is located on one side of the management core module (4).

10. The smart electric energy meter according to claim 1, characterized in that : It also includes a human-machine interaction interface (6), and the human-machine interaction interface (6) is arranged on the upper part of the shell (1); the shell (1) includes a cover body (12), and the cover body (12) can close the accommodating space (11) so that the outside of the shell (1) remains flat.

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