A modular energy metering box that is adaptable and detachable for use with smart grids

Abstract

This invention relates to the field of electricity meter technology, specifically to a modular electricity metering box adapted to smart grids that can be detached and assembled. The box includes: a cabinet, and a partition fixed within the cabinet, with a cabinet door rotatably mounted on the cabinet; an electricity meter placed within the cabinet, with a switch rotatably mounted on the meter; a positioning component connected to the electricity meter on the partition; and an elastic support mechanism located within the cabinet and connected to the electricity meter, with a locking mechanism connected to the electricity meter on the partition. During meter assembly, the positioning component limits the position of the electricity meter, and under the action of the locking mechanism and the elastic support mechanism, the switch position is first released, and then the electricity meter position is locked, thus completing the assembly. When the electricity meter needs to be disassembled, the locking mechanism controls the switch to be in an open state, ensuring safe assembly and disassembly.

Description

Technical Field

[0001] This invention relates to the field of electricity meter technology, specifically a modular electricity metering box that is adaptable to smart grids and can be detached and combined. Background Technology

[0002] With the deepening of smart grid construction, electricity metering equipment is developing towards modularity, intelligence, high reliability and easy maintenance.

[0003] As a key data acquisition and control node on the user side, the modular energy metering box's core component—the smart energy meter—is directly related to the efficiency of power grid operation and maintenance, the quality of electricity services, and the safety of operators in terms of its ease of installation, replacement, upgrade, and maintenance.

[0004] Currently, when installing smart meters in common modular metering boxes, guide rail clips are often used in conjunction with screws for fastening. The installation process is usually as follows: first, align the standard slot on the back of the meter with the guide rail inside the box and push it in. After initial positioning, use a screwdriver to tighten the fixing screws on both sides or the bottom of the meter to achieve mechanical locking.

[0005] However, regardless of installation or disassembly, relying solely on guide rails for rough positioning can easily lead to misalignment of the precision electrical pins and sockets if slight misalignment occurs during the insertion process. Forced insertion can cause the pins to bend or be damaged, affecting the reliability of the electrical connection. Furthermore, since the switch of the electricity meter is not restricted, it may be in a closed state before installation. Inserting or unplugging while the switch is on can easily generate an electric arc, seriously threatening personal and equipment safety. Summary of the Invention

[0006] The purpose of this invention is to provide a modular energy metering box that is adaptable to smart grids and can be disassembled and assembled, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A modular, detachable, and combinable energy metering box adapted to smart grids includes:

[0009] The cabinet body, and the shelves fixed inside the cabinet body, with cabinet doors that rotate on the cabinet body;

[0010] Also includes:

[0011] An electricity meter is placed inside the cabinet. A switch is rotatably installed on the electricity meter. A positioning component connected to the electricity meter is provided on the partition.

[0012] An elastic support mechanism is installed inside the cabinet and connected to the electricity meter. A locking mechanism connected to the electricity meter is provided on the partition. When the electricity meter cooperates with the positioning component, the position of the electricity meter is locked by the elastic support mechanism and the locking mechanism, and the position restriction of the switch is released.

[0013] As a further aspect of the present invention: the positioning component includes a limiting groove formed on the side wall of the electricity meter and arranged symmetrically, and a limiting rod arranged symmetrically and slidably engaged with the limiting groove is fixed on the partition plate.

[0014] As a further embodiment of the present invention: the elastic support mechanism includes a support sleeve fixed in the cabinet body, a support rod axially sliding inside the support sleeve, a push plate fixed at the end of the support rod, and the push plate engaging with the electricity meter.

[0015] As a further embodiment of the present invention: the elastic support mechanism further includes a groove formed on the outer circumference of the support sleeve, a protrusion fixed on the support rod that slides and engages with the groove, and a first spring sleeved on the support sleeve and the support rod, the two ends of the first spring abutting against the cabinet and the push plate respectively.

[0016] As a further embodiment of the present invention: the locking mechanism includes a limiting block fixed on the partition, a guide groove is formed on the limiting block, and a guide rod is rotatably mounted on the limiting block;

[0017] It also includes a sliding assembly and a pushing assembly disposed on the energy meter and cooperating with the guide groove.

[0018] As a further embodiment of the present invention: the sliding component includes a through groove formed on the energy meter, and a movable rod that abuts against the switch and the guide rod is slidably installed in the through groove, and the movable rod is slidably engaged with the guide groove.

[0019] As a further embodiment of the present invention: the jacking assembly includes a fixing plate fixed to the side wall of the electricity meter, a fixing sleeve fixed on the fixing plate, a push rod axially sliding inside the fixing sleeve, a support ring fixed to the end of the push rod and fixedly connected to the movable rod, and a second spring sleeved on the fixing sleeve and the push rod, the two ends of the second spring respectively abutting against the fixing plate and the support ring.

[0020] As a further embodiment of the present invention: the guide groove includes a slot, a vertical groove, and a horizontal groove formed on the limiting block, wherein one end of the vertical groove and the horizontal groove are connected to each other.

[0021] As a further embodiment of the present invention: a connecting contact is fixed inside the cabinet, and a plug-in contact is fixed on the energy meter to be inserted and mated with the connecting contact.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the present invention integrates pre-guidance, forced power-off and mechanical self-locking into one, realizing the rapid and safe installation and disassembly of the electricity meter. During the installation stage, the cooperation between the limiting rod and the tapered limiting groove forms a forced mechanical correction guide rail at the initial stage of electricity meter insertion, ensuring that the tail insertion contact head and the internal connection contact head of the box are axially precisely aligned, avoiding the risk of damage to electrical contacts due to misalignment during insertion and removal.

[0023] Before it is fully in place, the sliding of the movable rod along the inclined surface of the limit block automatically releases its lock on the switch operating handle, ensuring that the switch can be freely closed after the meter is in place, strictly following the safety sequence of "reliable connection first, then power on". After installation, the locking mechanism and the elastic support mechanism work together to automatically lock the position of the electricity meter.

[0024] During the disassembly phase, the operator only needs to gently push the energy meter into the cabinet to disengage the movable rod from the slot. Then, the second spring is released again, driving the movable rod longitudinally into the vertical slot. Its end forcibly impacts and moves the switch operating handle to the open position. This ensures that the circuit is forcibly cut off before the electrical connection is disconnected, completely eliminating the risk of electric arc during live operation. At the same time, under the action of the elastic support mechanism, the energy meter is automatically pushed out, thus smoothly completing the entire disassembly operation. Attached Figure Description

[0025] Figure 1 A schematic diagram of one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0026] Figure 2 A schematic diagram of the internal structure of a modular energy metering box that can be disassembled and combined to adapt to smart grids, in one embodiment.

[0027] Figure 3 A schematic diagram illustrating the connection relationship between the energy meter, elastic support mechanism, locking mechanism, and positioning component in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0028] Figure 4 A schematic diagram of the guiding components and locking mechanism in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0029] Figure 5 for Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0030] Figure 6 for Figure 4 Another structural diagram from another angle.

[0031] Figure 7 An exploded view of the elastic support mechanism in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0032] Figure 8 A schematic diagram of the locking mechanism in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0033] Figure 9 An exploded view of the limiting block and guide rod in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0034] Figure 10 An exploded view of part of the locking mechanism in one embodiment of a modular energy metering box that can be detached and combined to adapt to smart grids.

[0035] In the diagram: 1. Cabinet body; 101. Cabinet door; 2. Partition; 3. Limiting rod; 4. Electricity meter; 401. Limiting groove; 5. Insert contact head; 6. Connecting contact head; 7. Support sleeve; 701. Slide groove; 8. Support rod; 801. Protrusion; 9. Push plate; 10. First spring; 11. Through groove; 12. Limiting block; 1201. Slot; 1202. Vertical groove; 1203. Horizontal groove; 13. Guide rod; 14. Switch; 15. Movable rod; 16. Fixing plate; 17. Fixing sleeve; 18. Push rod; 19. Support ring; 20. Second spring. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0038] Please see Figures 1-10 In this embodiment of the invention, a modular energy metering box adapted to smart grids and capable of being detached and assembled includes:

[0039] Cabinet 1, and partition 2 fixed inside cabinet 1, cabinet door 101 is rotatably installed on cabinet 1;

[0040] Also includes:

[0041] An electricity meter 4 is placed inside the cabinet 1. A switch 14 is rotatably installed on the electricity meter 4. A positioning component connected to the electricity meter 4 is provided on the partition 2.

[0042] An elastic support mechanism is installed inside the cabinet 1 and connected to the electricity meter 4. A locking mechanism connected to the electricity meter 4 is provided on the partition 2. When the electricity meter 4 cooperates with the positioning component, the position of the electricity meter 4 is locked by the elastic support mechanism and the locking mechanism, and the position restriction of the switch 14 is released.

[0043] Specifically, during the assembly of the electricity meter 4, to ensure safe assembly and disassembly, it is necessary to ensure that the switch 14 is in the closed state. Therefore, before assembling the electricity meter 4, a locking mechanism can lock the position of the switch 14, ensuring that the electricity meter 4 is in a power-off state during assembly. When the electricity meter 4 is placed inside the cabinet 1, the positioning component guides the electricity meter 4 to the required position. Simultaneously, the electricity meter 4 also drives the elastic support mechanism and the locking mechanism to move. Under the action of the locking mechanism, the switch 14 is placed in the open state. It should be noted that the position is no longer locked. When the electricity meter 4 is assembled, the position of the electricity meter 4 can be locked by the cooperation of the elastic support mechanism and the locking mechanism, so as to ensure complete safe assembly. Similarly, when disassembly is required, the electricity meter 4 continues to move towards the cabinet 1, and the locking mechanism controls the switch 14 to disconnect first, and then unlock the position of the electricity meter 4. At the same time, the elastic support mechanism moves and actively pushes the electricity meter 4 out. In this way, it can be ensured that the electricity meter 4 is in the disconnected state during the installation and disassembly process, so as to ensure the safe use of the electricity meter 4.

[0044] Please see Figures 1-4 , Figure 6 The positioning component includes a limiting groove 401 formed on the side wall of the electricity meter 4 and arranged symmetrically, and a limiting rod 3 arranged symmetrically and slidably engaged with the limiting groove 401 is fixed on the partition plate 2.

[0045] Please see Figure 6 The cabinet 1 is fixed with a connecting contact 6, and the electricity meter 4 is fixed with a plug contact 5 that is plugged into and cooperates with the connecting contact 6.

[0046] Please see Figure 6In detail, the limiting groove 401 can be divided into two parts. The first part is located on the side close to the switch 14, that is, close to the front end of the energy meter 4, and the other part is close to the rear end of the energy meter 4. Starting from the rear end of the energy meter 4, the limiting groove 401 is set in a gradually narrowing opening until the opening size of the limiting groove 401 gradually narrows to the same size as the limiting rod 3, at which point the size of the limiting groove 401 no longer changes.

[0047] When assembling the electricity meter 4, in order to avoid the misalignment of the plug contact 5 and the connecting contact 6 due to the misalignment of the electricity meter 4 during assembly, which could lead to damage to the plug contact 5 and the connecting contact 6 due to the force applied, it is necessary to lock the installation trajectory of the electricity meter 4. To do this, the electricity meter 4 can be held in hand and controlled to enter the cabinet 1. When the electricity meter 4 is located between the two limit rods 3, since the opening size of the limit groove 401 is larger than the limit rod 3, it can be ensured that the limit rod 3 slides smoothly into the tapered opening of the limit groove 401.

[0048] As the operator continues to push the energy meter 4 into the cabinet 1, the deeper movement of the energy meter 4 forces the limiting rod 3 to slide along the gradually narrowing side wall of the limiting groove 401. This gradually narrowing trajectory provides forced guidance for the movement of the limiting rod 3, gradually correcting and converging any possible lateral or longitudinal offset of the energy meter 4, until the limiting rod 3 slides into the positioning section in the limiting groove 401 whose size is perfectly matched, thereby completing the locking of the position of the energy meter 4 in the horizontal and vertical directions. At this point, the energy meter 4 can only continue to move radially along the limiting rod 3.

[0049] In this state, the plug contact 5 and the connecting contact 6 inside the cabinet 1 are aligned axially. In this way, the risk of electrical contact deformation and damage caused by the misalignment of the plug contact 5 and the connecting contact 6 due to the offset position of the energy meter 4 can be avoided.

[0050] After positioning, the operator continues to apply pushing force, and the insertion contact 5 and the connecting contact 6 continue to approach and finally complete the insertion. Since the docking process occurs on a perfectly aligned axis and there is no lateral interference, the insertion action is smooth and unobstructed, minimizing contact resistance and avoiding contact wear caused by skewed insertion and removal.

[0051] Please see Figure 3 , Figure 4 , Figure 6 , Figure 7The elastic support mechanism includes a support sleeve 7 fixed inside the cabinet 1, a support rod 8 axially sliding inside the support sleeve 7, a push plate 9 fixed at the end of the support rod 8, and the push plate 9 abutting against the energy meter 4. The elastic support mechanism also includes a groove 701 formed on the outer circumference of the support sleeve 7, a protrusion 801 fixed on the support rod 8 that slides into the groove 701, and a first spring 10 sleeved on the support sleeve 7 and the support rod 8. The two ends of the first spring 10 abut against the cabinet 1 and the push plate 9, respectively.

[0052] Please see Figures 1-6 , Figures 8-10 The locking mechanism includes a limiting block 12 fixed on the partition 2, a guide groove formed on the limiting block 12, and a guide rod 13 rotatably mounted on the limiting block 12; it also includes a sliding assembly and a pushing assembly disposed on the energy meter 4 and cooperating with the guide groove. The sliding assembly includes a through groove 11 formed on the energy meter 4, and a movable rod 15 that abuts against the switch 14 and the guide rod 13 is slidably mounted in the through groove 11. The movable rod 15 is slidably engaged with the guide groove. The pushing assembly includes a fixing plate fixed to the side wall of the energy meter 4. 16. A fixing sleeve 17 is fixed on the fixing plate 16. A push rod 18 slides axially inside the fixing sleeve 17. A support ring 19, which is fixedly connected to the movable rod 15, is fixed at the end of the push rod 18. A second spring 20 is sleeved on the fixing sleeve 17 and the push rod 18. The two ends of the second spring 20 abut against the fixing plate 16 and the support ring 19, respectively. The guide groove includes a slot 1201, a vertical groove 1202, and a horizontal groove 1203 formed on the limiting block 12. One end of the vertical groove 1202 and the horizontal groove 1203 are connected to each other.

[0053] Please see Figure 9 Furthermore, the slot 1201 is arranged in an arc trapezoidal shape, with one side of the slot 1201 being vertical and the other side being inclined. The two upper edges are arc-shaped, and the radius of the arc is equal to the radius of the movable rod 15. The limiting block 12 is arranged in a right-angled trapezoidal shape. A torsion spring is sleeved on the rotating shaft of the guide rod 13. Under the action of the torsion spring, when the guide rod 13 is not subjected to external force, it combines with the inclined edge of the limiting block 12 to form a whole and seal the transverse groove 1203.

[0054] In the initial state, the electricity meter 4 has not yet been assembled. At this time, the support rod 8 inside the cabinet 1 is located at the end of its stroke away from the support sleeve 7, so that the protrusion 801 is located at the end of its stroke on the side of the slide groove 701 close to the push plate 9. In this state, the distance between the push plate 9 and the inner wall of the cabinet 1 is the largest, and the elongation of the first spring 10 in its natural state is greater than the maximum distance between the push plate 9 and the inner wall of the cabinet 1. Therefore, the first spring 10 is in a pre-compressed state and always provides the push plate 9 with a pushing force in the direction away from the cabinet 1.

[0055] The movable rod 15 is located at the end of its stroke on the side of the through groove 11 near the limiting groove 401 and is in contact with the switch 14. At this time, the switch 14 is turned downward and is in the power-off state. The movable rod 15 controls the support ring 19 to be located at the end of its stroke on the side away from the fixed plate 16, that is, the distance between the support ring 19 and the fixed plate 16 is the largest, so that the size of the mutual fitting between the push rod 18 and the fixed sleeve 17 is the smallest. The elongation of the second spring 20 in its natural state is greater than the maximum distance between the support ring 19 and the fixed plate 16. Therefore, the second spring 20 is in a pre-compressed state and always provides the support ring 19 with a thrust in the direction away from the fixed plate 16.

[0056] When it is necessary to assemble the electricity meter 4, control the electricity meter 4 to enter the cabinet 1, and under the action of the guide component, lock the position of the electricity meter 4 in the horizontal and vertical directions. As the electricity meter 4 continues to be pushed, the electricity meter 4 will drive the movable rod 15 to continue to move.

[0057] When the movable rod 15 moves to abut against the inclined surface of the limiting block 12, under the axial thrust of the operator continuously pushing the energy meter 4, the movable rod 15 slides along the inclined surface of the limiting block 12. The inclined surface decomposes the axial thrust into a normal component force that forces the movable rod 15 to move horizontally towards the fixed plate 16. Driven by this component force, the movable rod 15 overcomes the preload force of the second spring 20 and slides in the through groove 11, and its end disengages from the operating handle of the switch 14.

[0058] At the same time, the movable rod 15 drives the push rod 18 to retract into the fixed sleeve 17 through the support ring 19, thereby continuously compressing the second spring 20. During this process, the movable rod 15 will be in contact with one side of the guide rod 13, and under the guidance of the guide rod 13, it will be ensured that the movable rod 15 always slides along the inclined surface of the limit block 12 and prevent the movable rod 15 from entering the transverse groove 1203.

[0059] Please see Figure 5When the movable rod 15 slides past the top of the inclined surface of the limit block 12, it falls to the horizontal surface below the limit block 12. The operator continues to move the energy meter 4 horizontally, and the movable rod 15 slides along this horizontal surface until it moves to the position of engaging with the slot 1201. At this time, the second spring 20 is released elastically and pushes the movable rod 15 into the slot 1201 through the support ring 19, and forms a tight contact with an arc edge at the upper end of the slot 1201. In this state, the movable rod 15 is completely disengaged from the operating handle area of ​​the switch 14, completing the function switch from locking the switch 14 to disengaging the switch 14.

[0060] Meanwhile, during the insertion process, the first spring 10 is continuously compressed. The first spring 10 always provides the energy meter 4 with a pushing force in the direction away from the cabinet 1. However, when this pushing force is transmitted to the movable rod 15 through the energy meter 4, it is completely blocked by the vertical side wall and the rounded edge of the slot 1201, thus completing the assembly of the energy meter 4. At this time, the switch 14 can be manually controlled to turn on.

[0061] When it is necessary to disassemble the energy meter 4, the operator continues to push the energy meter 4 toward the push plate 9, so that the movable rod 15 slides along the inclined section of the upper end of the slot 1201 facing its side. Under the guidance of the inclined section, the movable rod 15 continues to move toward the fixed plate 16 and finally completely disengages from the slot 1201 and returns to the lower horizontal surface of the limit block 12. As the energy meter 4 continues to move inward, the movable rod 15 slides to the position aligned with the entrance of the vertical slot 1202.

[0062] At this time, the second spring 20, which has been in a compressed state, is released again and quickly pushes the movable rod 15 into the vertical groove 1202 through the support ring 19. The movable rod 15 will again abut against the operating handle of the switch 14 and force it to switch from the closed state to the open position. This ensures that the switch 14 has been mechanically forced to open before the electrical connection is disconnected, strictly adhering to the operating standard of "power off first, then disconnect".

[0063] When the movable rod 15 moves to the position where the vertical groove 1202 and the horizontal groove 1203 are connected, the first spring 10 is released elastically and pushes the energy meter 4 to move outward toward the cabinet 1. During the ejection process, the movable rod 15 slides along the horizontal groove 1203. When the movable rod 15 moves to the position where it abuts against the other side of the guide rod 13, the contact at its front end forces the guide rod 13 to overcome the torsion spring force and rotate to make way, thereby ensuring that the movable rod 15 can smoothly disengage from the guide groove, achieving the purpose of quick and safe disassembly, and eliminating the safety hazards and electric arc risks that may be caused by human error.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A modular energy metering box adapted to smart grids, comprising: The cabinet body, and the shelves fixed inside the cabinet body, with cabinet doors that rotate on the cabinet body; Its characteristic is that it further includes: An electricity meter is placed inside the cabinet. A switch is rotatably installed on the electricity meter. A positioning component connected to the electricity meter is provided on the partition. An elastic support mechanism is installed inside the cabinet and connected to the electricity meter. A locking mechanism connected to the electricity meter is provided on the partition. When the electricity meter cooperates with the positioning component, the position of the electricity meter is locked by the elastic support mechanism and the locking mechanism, and the position restriction of the switch is released. The locking mechanism includes a limiting block fixed to the partition, a guide groove formed on the limiting block, and a guide rod rotatably mounted on the limiting block; It also includes a sliding assembly and a pushing assembly disposed on the energy meter and cooperating with the guide groove; The sliding assembly includes a through groove formed on the energy meter, and a movable rod that abuts against the switch and the guide rod is slidably installed in the through groove, the movable rod being slidably engaged with the guide groove; The guide groove includes a slot, a vertical groove, and a horizontal groove formed on the limiting block, with one end of the vertical groove and the horizontal groove connected to each other.

2. The modular energy metering box adapted to smart grids and capable of being detached and combined according to claim 1, characterized in that, The positioning component includes symmetrically arranged limiting grooves formed on the side wall of the electricity meter, and symmetrically arranged limiting rods that slide and engage with the limiting grooves are fixed on the partition plate.

3. A modular energy metering box adapted to smart grids and capable of being disassembled and assembled, as described in claim 1, is characterized in that... The elastic support mechanism includes a support sleeve fixed inside the cabinet, a support rod that slides axially inside the support sleeve, and a push plate fixed to the end of the support rod, the push plate engaging with the electricity meter.

4. A modular energy metering box adapted to a smart grid and capable of being detached and combined, as described in claim 3, is characterized in that... The elastic support mechanism further includes a groove formed on the outer circumference of the support sleeve, a protrusion fixed on the support rod that slides into the groove, and a first spring sleeved on the support sleeve and the support rod, with the two ends of the first spring abutting against the cabinet and the push plate respectively.

5. A modular energy metering box adapted to smart grids and capable of being disassembled and assembled, as described in claim 1, is characterized in that... The jacking assembly includes a fixing plate fixed to the side wall of the electricity meter, a fixing sleeve fixed on the fixing plate, a push rod axially sliding inside the fixing sleeve, a support ring fixed to the end of the push rod and fixedly connected to the movable rod, and a second spring sleeved on the fixing sleeve and the push rod, with the two ends of the second spring abutting against the fixing plate and the support ring respectively.

6. A modular energy metering box adapted to smart grids and capable of being detached and combined, as described in claim 1, is characterized in that... A connecting contact is fixed inside the cabinet, and a plug-in contact is fixed on the energy meter to be inserted and mated with the connecting contact.

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