Energy-saving low-voltage mutual inductor type metering box

Abstract

The invention belongs to the technical field of metering boxes, and particularly discloses an energy-saving low-voltage transformer type metering box, which comprises a box body, one side of the box body is rotatably connected with two rotating doors, the inner sides of the rotating doors are rotatably connected with a convenient mechanism, and the convenient mechanism facilitates the maintenance and installation of internal electronic components of the box body. The device comprises a box body, elastic pushing mechanisms are rotationally connected to the two sides of the interior of the box body, a loading and unloading mechanism is arranged outside the box body and facilitates installation of the box body, the loading and unloading mechanism comprises limiting sliding grooves, and the two limiting sliding grooves are formed in the two sides of the top end of the interior of the box body respectively. Through the arrangement of the convenient mechanism and the elastic pushing mechanism, the side edge of the box body of the energy-saving low-voltage mutual inductor type metering box can be opened, and electronic elements or cables in the box body can be conveniently installed or overhauled, so that time and labor are saved, and the workload of workers can be reduced while the installation efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metering boxes, and specifically discloses an energy-saving low-voltage current transformer type metering box. Background Art

[0002] An energy-saving low-voltage current transformer type metering box is a metering device used in low-voltage power systems. It uses current transformers to accurately measure current and voltage, and can accurately measure power consumption. It has energy-saving characteristics. By optimizing the design and selecting low-loss materials, its own energy consumption is reduced. At the same time, it has good protection performance, which can effectively protect internal components from the influence of the external environment. It is widely used in the fields of industrial, commercial and residential electricity metering, providing reliable support for accurate billing and power management.

[0003] For an existing energy-saving low-voltage current transformer type metering box, generally only the front side of the box body can be opened, while the side cannot be opened. And the space inside the box body is limited. Therefore, when installing or overhauling electronic components and cables, due to the narrow space on the side, it is inconvenient to carry out maintenance or installation, which is time-consuming and laborious, reducing the installation efficiency and increasing the workload of the staff at the same time. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an energy-saving low-voltage current transformer type metering box to solve the problem that the space on the side of the box body of an existing energy-saving low-voltage current transformer type metering box is narrow, inconvenient for maintenance or installation, time-consuming and laborious, reducing the installation efficiency and increasing the workload of the staff at the same time.

[0005] To achieve the above purpose, the present invention provides an energy-saving low-voltage current transformer type metering box, including a box body. Two rotating doors are rotatably connected to one side of the box body. A convenient mechanism is rotatably connected to the inner side of the rotating door. The convenient mechanism facilitates the maintenance and installation of the internal electronic components of the box body. Elastic pushing mechanisms are rotatably connected to both sides inside the box body. A loading and unloading mechanism is arranged outside the box body. The loading and unloading mechanism facilitates the installation of the box body.

[0006] In the above technical solution, preferably, the convenient mechanism includes limiting sliding grooves. Two of the limiting sliding grooves are respectively opened on both sides of the inner top of the box body. A sliding block is slidably connected inside the limiting sliding groove. A moving block is fixedly connected to the bottom of the sliding block. One side of the top of the moving block is fixedly connected with a sliding block. A connecting rod is rotatably connected to the bottom of the moving block. Side doors are rotatably connected to both sides of the box body. A docking sliding bar is fixedly connected to the inner top of the side door. A moving bar is fixedly connected to the inner top of the side door. Fixed bars are fixedly connected to both sides of the inner top of the box body. The outer parts of the moving bar and the fixed bar are both slidably connected inside the inner side of the sliding block. The side of the connecting rod away from the side door is rotatably connected to the inner side of the rotating door.

[0007] In the above technical solution, preferably, the elastic pushing mechanism includes rotating cylinders. One ends of two of the rotating cylinders close to the rotating door are respectively rotatably connected to both sides of the inner bottom end of the box body. A limiting ring is slidably connected inside the rotating cylinder. A movable rod is fixedly connected to the side of the limiting ring away from the rotating door. The end of the movable rod away from the limiting ring is rotatably connected to the inner side of the side door. A tension spring is arranged inside the rotating cylinder.

[0008] In the above technical solution, preferably, the loading and unloading mechanism includes four mounting ears and a mounting plate. The four mounting ears are respectively fixedly connected to the bottom of the box body and the side of the box body away from the rotating door. Mounting sliding grooves are respectively opened inside both sides of the mounting plate. The mounting ears are slidably connected inside the mounting sliding grooves. Clamping holes are respectively opened inside both sides of the mounting plate. Two fixed cylinders are fixedly connected to the inner bottom of the box body. A sliding limiting disk is slidably connected inside the fixed cylinder. A plug rod is fixedly connected to the middle of the sliding limiting disk. A spring is arranged inside the fixed cylinder.

[0009] In the above technical solution, preferably, one end of the tension spring is fixedly connected to the inside of the rotating cylinder, and the other end of the tension spring is fixedly connected to the inside of the movable rod.

[0010] In the above technical solution, preferably, a mounting disk is fixedly connected to the inner side of the side door. A rotating ear is rotatably connected to the side of the mounting disk away from the side door.

[0011] In the above technical solution, preferably, a resisting column is fixedly connected to the side of the rotating ear close to the side door. The side of the resisting column away from the rotating ear is in contact with the inner side of the box body.

[0012] In the above technical solution, preferably, one end of the spring is fixedly connected to one end of the fixed cylinder, and the other end of the spring is fixedly connected to the top of the sliding limiting disk.

[0013] In the above technical solution, preferably, a blocking rod is fixedly connected to the side of the box body away from the rotating door, and the two mounting ears are respectively fixedly connected to both sides of the blocking rod.

[0014] In the above technical solution, preferably, mounting holes are provided at the four corners of the mounting plate, and the bottom of the insertion rod is engaged with the engaging hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Through the setting of the convenient mechanism and the elastic pushing mechanism, the present invention can open the side of the box body of an energy-saving low-voltage mutual inductor type metering box, and then can increase the working space on the side of the box body, which is convenient for installing or overhauling the electronic components or cables inside the box body. Therefore, it saves time and effort, improves the installation efficiency and can also reduce the workload of the staff.

[0016] Through the loading and unloading mechanism, the present invention can enable an energy-saving low-voltage mutual inductor type metering box to adapt to suspended installation and ground installation. When installing, there is no need to select the box body of an energy-saving low-voltage mutual inductor type metering box according to suspended installation or ground installation. Therefore, the practicability of the box body of an energy-saving low-voltage mutual inductor type metering box is increased. At the same time, only the mounting plate needs to be installed once, and there is no need to install the mounting plate again when installing the box body again. Therefore, it is convenient for installing the box body and improves the convenience of box body installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional view of the present invention Figure 1 ; Figure 2 is a three-dimensional view of the present invention Figure 2 ; Figure 3 is a schematic structural view of the mounting ear of the present invention; Figure 4 is a schematic structural view of the blocking rod of the present invention; Figure 5 is a schematic structural view of the connecting rod of the present invention; Figure 6 is a schematic structural view of the sliding block of the present invention; Figure 7 is a schematic structural view of the limiting chute of the present invention; Figure 8 is a schematic structural view of the docking slide bar of the present invention; Figure 9 is a schematic structural view of the moving bar of the present invention; Figure 10 is a schematic structural view of the rotating cylinder of the present invention; Figure 11 is a schematic structural view of the mounting plate of the present invention; Figure 12 Structural schematic diagram of the fixed cylinder of the present invention; Figure 13 Structural schematic diagram of the side door of the present invention; Figure 14 Structural schematic diagram of the rotating ear of the present invention.

[0018] In the figure: 1, box body; 2, rotating door; 3, convenient mechanism; 301, limiting chute; 302, sliding block; 303, moving block; 304, sliding block; 305, connecting rod; 306, side door; 307, docking slide bar; 308, moving bar; 309, fixed bar; 4, elastic pushing mechanism; 401, rotating cylinder; 402, limiting ring; 403, movable rod; 404, tension spring; 405, mounting disc; 406, rotating ear; 407, abutting column; 5, loading and unloading mechanism; 501, mounting ear; 502, blocking rod; 503, mounting plate; 504, mounting sliding chute; 505, engaging hole; 506, mounting hole; 507, fixed cylinder; 508, sliding limit disc; 509, inserting rod; 510, spring. Detailed implementation manners

[0019] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the limitations of the specific embodiments disclosed below.

[0021] As Figures 1 - 14 shown, an energy-saving low-voltage mutual inductor type metering box includes a box body 1. Two rotating doors 2 are rotatably connected to one side of the box body 1. A convenient mechanism 3 is rotatably connected to the inner side of the rotating door 2. The convenient mechanism 3 facilitates the maintenance and installation of the internal electronic components of the box body 1. Elastic pushing mechanisms 4 are rotatably connected to both sides inside the box body 1. A loading and unloading mechanism 5 is arranged outside the box body 1. The loading and unloading mechanism 5 facilitates the installation of the box body 1.

[0022] The convenient mechanism 3 includes a limit chute 301 which provides a position for installation and sliding. The two limit chutes 301 are respectively opened on both sides of the inner top of the box body 1. A sliding block 302 is slidably connected inside the limit chute 301. A moving block 303 is fixedly connected to the bottom of the sliding block 302. The sliding block 302 can limit the movement track of the moving block 303 and can maintain the movement stability of the moving block 303. A sliding block 304 is fixedly connected to one side of the top of the moving block 303. A connecting rod 305 is rotatably connected to the bottom of the moving block 303. When the rotating door 2 is opened, it can drive the sliding block 304 to move through the connecting rod 305. Side doors 306 are rotatably connected to both sides of the box body 1. After the side doors 306 are opened, there is no obstruction on the side of the box body 1. Then, when installing or repairing electronic components or circuits inside the box body 1, the working space can be enlarged, and then it is convenient to repair or replace the electronic components or cables inside the box body 1. A docking slide bar 307 is fixedly connected to the inner top of the side door 306, and a moving bar 308 is fixedly connected to the inner top of the side door 306. Fixed bars 309 are fixedly connected to both sides of the inner top of the box body 1. The moving bar 308 and the fixed bar 309 can be combined together under the action of the sliding block 304. The outer sides of the moving bar 308 and the fixed bar 309 are both slidably connected to the inside of the sliding block 304. One side of the connecting rod 305 away from the side door 306 is rotatably connected to the inside of the rotating door 2. When installing or repairing the electronic components and circuits inside the box body 1, first open the rotating door 2. After the rotating door 2 is opened, it can drive the end of the connecting rod 305 connected to the rotating door 2 to move out of the inside of the box body 1, so as to drive the other end of the connecting rod 305 to move towards the direction of the rotating door 2, and then drive the moving block 303 and the sliding block 304 to move towards the side of the rotating door 2. When the rotating door 2 is opened by 90 degrees, a part of the inside of the sliding block 304 moves outside the docking slide bar 307, and the other part moves outside the moving bar 308 and the fixed bar 309. At this time, without the restriction of the sliding block 304, the moving bar 308 and the fixed bar 309 can be separated, and at this time the side door 306 can be opened.

[0023] The elastic pushing mechanism 4 includes a rotating cylinder 401 which provides an installation position. One end of each of the two rotating cylinders 401 close to the rotating door 2 is rotatably connected to both sides of the inner bottom end of the box body 1. A limiting ring 402 is slidably connected inside the rotating cylinder 401, and the limiting ring 402 can play a limiting role. A movable rod 403 is fixedly connected to the side of the limiting ring 402 away from the rotating door 2. One end of the movable rod 403 away from the limiting ring 402 is rotatably connected to the inner side of the side door 306. The extension or retraction of the movable rod 403 can push the side door 306 to open or pull the side door 306 to reset. A tension spring 404 is arranged inside the rotating cylinder 401, and the reaction force of the tension spring 404 can push the movable rod 403 to extend, thereby assisting the side door 306 to open. One end of the tension spring 404 is fixedly connected to the inside of the rotating cylinder 401, and the other end of the tension spring 404 is fixedly connected to the inside of the movable rod 403. An installation disc 405 is fixedly connected to the inner side of the side door 306, and the installation disc 405 provides an installation position. A rotating ear 406 is rotatably connected to the side of the installation disc 405 away from the side door 306. A resisting column 407 is fixedly connected to the side of the rotating ear 406 close to the side door 306. The rotation of the rotating ear 406 drives the resisting column 407 to rotate, so that after the docking slide bar 307 abuts against the inner side of the box body 1, the side door 306 will not be rotated and opened under the action of the movable rod 403. The side of the resisting column 407 away from the rotating ear 406 is in contact with the inner side of the box body 1. When the moving bar 308 and the fixed bar 309 can be separated, the rotating ear 406 is rotated from the horizontal state to the vertical state. At this time, the resisting column 407 will no longer abut against the inner side of the box body 1. Then, under the action of the reaction force of the tension spring 404, the movable rod 403 is pushed to move outward, and then the side door 306 can be pushed to rotate and open. Then, when installing or overhauling the internal electronic components or circuits of the box body 1, the side door 306 can be pushed open, so that the working space inside the box body 1 becomes larger, and then it is convenient to overhaul the internal electronic components or circuits of the box body 1.

[0024] The loading and unloading mechanism 5 includes four mounting ears 501 and a mounting plate 503. The mounting ears 501 can provide mounting positions, and the mounting plate 503 can facilitate the installation of the box body 1. The four mounting ears 501 are respectively fixedly connected to the bottom of the box body 1 and the side of the box body 1 away from the rotating door 2. Mounting sliding grooves 504 are respectively formed inside both sides of the mounting plate 503. The mounting sliding grooves 504 can facilitate the sliding of the mounting ears 501 into the inside of the mounting plate 503. The mounting ears 501 are slidably connected to the inside of the mounting sliding grooves 504. Engagement holes 505 are respectively formed inside both sides of the mounting plate 503. Two fixed cylinders 507 are fixedly connected to the inner bottom of the box body 1. The fixed cylinders 507 can provide mounting positions. A sliding limit disk 508 is slidably connected to the inside of the fixed cylinder 507. The sliding limit disk 508 has a limiting function. A plug rod 509 is fixedly connected to the middle of the sliding limit disk 508. After the plug rod 509 is inserted into the engagement hole 505, it can prevent the mounting plate 503 mounted on the bottom of the box body 1 from sliding out of the bottom of the box body 1. A spring 510 is arranged inside the fixed cylinder 507. The spring 510 can use its own reaction force to reset the sliding limit disk 508. One end of the spring 510 is fixedly connected to one end of the fixed cylinder 507, and the other end of the spring 510 is fixedly connected to the top of the sliding limit disk 508. A blocking rod 502 is fixedly connected to the side of the box body 1 away from the rotating door 2. The two sides of the blocking rod 502 are respectively fixedly connected to the closer sides of two of the mounting ears 501. Mounting holes 506 are formed at the four corners of the mounting plate 503. The bottom of the plug rod 509 is engaged with the engagement hole 505. When the box body 1 is installed, if it is installed on the ground, the mounting sliding grooves 504 are aligned with the two mounting ears 501 at the bottom of the box body 1, and the mounting plate 503 is pushed in. At the same time, the top of the plug rod 509 is lifted upward, and then the plug rod 509 can move upward, so that the sliding limit disk 508 can be driven to move upward, and the spring 510 is compressed by the sliding limit disk 508. When the engagement hole 505 on the mounting plate 503 moves to the bottom of the plug rod 509, the top of the plug rod 509 is released. At this time, under the reaction force of the spring 510, the sliding limit disk 508 can be pushed to move downward, so that the plug rod 509 can be driven to move downward, and then the plug rod 509 can be engaged in the engagement hole 505, completing the installation of the mounting plate 503 on the bottom of the box body 1. When the box body 1 is disassembled from the mounting plate 503, only the plug rod 509 needs to be pulled upward, and the box body 1 is slid out from the top of the mounting plate 503. If the box body 1 is to be installed by hanging, first the mounting plate 503 is installed on the wall to be installed. At this time, the bottom of the mounting ear 501 at the rear of the box body 1 is aligned with the mounting sliding groove 504 on the mounting plate 503 mounted on the wall, and the mounting ear 501 is slid into the inside of the mounting sliding groove 504. When the top of the hanging mounting plate 503 touches the blocking rod 502, the mounting ear 501 can no longer move downward, and then the hanging installation of the box body 1 is completed.When disassembling, just slide the box body 1 upward. After the installation ear 501 completely slides out of the interior of the installation sliding groove 504, the disassembly of the box body 1 can be completed. After the loading and unloading mechanism 5 is installed, if the box body 1 is damaged, the box body 1 can be directly disassembled from the mounting plate 503, and then a new box body 1 can be installed on the mounting plate 503. The installation is convenient, time-saving and labor-saving.

[0025] Working principle: When installing or repairing the electronic components and circuits inside the box body 1, first open the rotating door 2. After the rotating door 2 is opened, the end of the connecting rod 305 connected to the rotating door 2 can be driven to move out of the interior of the box body 1, so as to drive the other end of the connecting rod 305 to move towards the direction of the rotating door 2, and then drive the moving block 303 and the sliding block 304 to move towards one side of the rotating door 2. When the rotating door 2 is opened by 90 degrees, a part of the interior of the sliding block 304 moves outside the docking slide bar 307, and the other part moves outside the moving bar 308 and the fixed bar 309. At this time, without the restriction of the sliding block 304, the moving bar 308 and the fixed bar 309 can be separated, and then the side door 306 can be opened; When the moving bar 308 and the fixed bar 309 can be separated, rotate the rotating ear 406 from the horizontal state to the vertical state. At this time, the abutting column 407 will no longer abut against the inner side of the box body 1. Then, under the reaction force of the tension spring 404, the movable rod 403 can be pushed to move outward, and then the side door 306 can be pushed to rotate and open. Then, when installing or repairing the electronic components or circuits inside the box body 1, the side door 306 can be pushed open, so that the working space inside the box body 1 becomes larger, and then it is convenient to repair the electronic components or circuits inside the box body 1; When the box body 1 is installed, if it is installed on the ground, align the installation sliding groove 504 with the two installation ears 501 at the bottom of the box body 1, and push the installation plate 503 in. At the same time, lift the top of the insertion rod 509 upward, so that the insertion rod 509 can move upward, thereby driving the sliding limit disc 508 to move upward. Compress the spring 510 by using the sliding limit disc 508. After the engaging hole 505 on the installation plate 503 moves to the bottom of the insertion rod 509, release the top of the insertion rod 509. At this time, under the reaction force of the spring 510, it can push the sliding limit disc 508 to move downward, thereby driving the insertion rod 509 to move downward, and then the insertion rod 509 can be engaged inside the engaging hole 505, completing the installation of the installation plate 503 at the bottom of the box body 1. When disassembling the box body 1 from the installation plate 503, just pull the insertion rod 509 upward and slide the box body 1 out of the top of the installation plate 503. If the box body 1 is to be installed by hanging, first install the installation plate 503 on the wall to be installed. At this time, align the bottom of the installation ear 501 at the rear of the box body 1 with the installation sliding groove 504 on the installation plate 503 installed on the wall, and slide the installation ear 501 into the installation sliding groove 504. When the top of the hanging installation plate 503 touches the blocking rod 502, the installation ear 501 can no longer move downward, and then the hanging installation of the box body 1 can be completed. When disassembling, just slide the box body 1 upward. When the installation ear 501 completely slides out of the installation sliding groove 504, the disassembly of the box body 1 can be completed. After the loading and unloading mechanism 5 is installed, if the box body 1 is damaged, the box body 1 can be directly disassembled from the installation plate 503, and then a new box body 1 can be installed on the installation plate 503. The installation is convenient, time-saving and labor-saving.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving low-voltage instrument transformer type metering box, comprising a box body (1), characterized in that, On one side of the box body (1), two rotating doors (2) are rotatably connected. An easy-access mechanism (3) is rotatably connected to the inner side of the rotating door (2). The easy-access mechanism (3) facilitates the maintenance and installation of the internal electronic components of the box body (1). On both sides inside the box body (1), elastic pushing mechanisms (4) are rotatably connected. An unloading and loading mechanism (5) is arranged outside the box body (1), and the unloading and loading mechanism (5) facilitates the installation of the box body (1).

2. The energy-saving low-voltage mutual inductor type metering box according to claim 1, characterized in that The easy-access mechanism (3) includes limiting sliding grooves (301). The two limiting sliding grooves (301) are respectively opened on both sides of the inner top of the box body (1). A sliding block (302) is slidably connected to the inside of the limiting sliding groove (301). A moving block (303) is fixedly connected to the bottom of the sliding block (302). A sliding block (304) is fixedly connected to one side of the top of the moving block (303). A connecting rod (305) is rotatably connected to the bottom of the moving block (303). Side doors (306) are rotatably connected to both sides of the box body (1). A docking sliding bar (307) is fixedly connected to the inner top of the side door (306). A moving bar (308) is fixedly connected to the inner top of the side door (306). Fixed bars (309) are fixedly connected to both sides of the inner top of the box body (1). The outer sides of the moving bar (308) and the fixed bar (309) are both slidably connected to the inside of the sliding block (304). The side of the connecting rod (305) away from the side door (306) is rotatably connected to the inner side of the rotating door (2).

3. The energy-saving low-voltage mutual inductor type metering box according to claim 2, characterized in that, The elastic pushing mechanism (4) includes rotating cylinders (401). One ends of the two rotating cylinders (401) close to the rotating door (2) are respectively rotatably connected to both sides of the inner bottom end of the box body (1). A limiting ring (402) is slidably connected to the inside of the rotating cylinder (401). A movable rod (403) is fixedly connected to the side of the limiting ring (402) away from the rotating door (2). One end of the movable rod (403) away from the limiting ring (402) is rotatably connected to the inner side of the side door (306). A tension spring (404) is arranged inside the rotating cylinder (401).

4. The energy-saving low-voltage mutual inductor type metering box according to claim 1, characterized in that, The unloading and loading mechanism (5) includes four mounting ears (501) and a mounting plate (503). The four mounting ears (501) are respectively fixedly connected to the bottom of the box body (1) and the side of the box body (1) away from the rotating door (2). Mounting sliding grooves (504) are respectively opened on both sides inside the mounting plate (503). The mounting ears (501) are slidably connected to the inside of the mounting sliding grooves (504). Clamping holes (505) are respectively opened on both sides inside the mounting plate (503). Two fixed cylinders (507) are fixedly connected to the inner bottom of the box body (1). A sliding limiting disc (508) is slidably connected to the inside of the fixed cylinder (507). A plug rod (509) is fixedly connected to the middle of the sliding limiting disc (508). A spring (510) is arranged inside the fixed cylinder (507).

5. The energy-saving low-voltage mutual inductor type metering box according to claim 3, characterized in that, One end of the tension spring (404) is fixedly connected to the inside of the rotating cylinder (401), and the other end of the tension spring (404) is fixedly connected to the inside of the movable rod (403).

6. The energy-saving low-voltage current transformer type metering box according to claim 2, characterized in that, An installation disk (405) is fixedly connected to the inner side of the side door (306), and a rotating ear (406) is rotatably connected to the side of the installation disk (405) away from the side door (306).

7. An energy-saving low-voltage mutual inductor type metering box according to claim 6, characterized in that, A resisting column (407) is fixedly connected to the side of the rotating ear (406) close to the side door (306), and the side of the resisting column (407) away from the rotating ear (406) is in contact with the inner side of the box body (1).

8. An energy-saving low-voltage mutual inductor type metering box according to claim 4, characterized in that, One end of the spring (510) is fixedly connected to one end of the fixed cylinder (507), and the other end of the spring (510) is fixedly connected to the top of the sliding limit disk (508).

9. The energy-saving low-voltage mutual inductor type metering box according to claim 4, characterized in that, A blocking rod (502) is fixedly connected to the side of the box body (1) away from the rotating door (2), and the two sides close to each other of the mounting ears (501) are respectively fixedly connected to both sides of the blocking rod (502).

10. An energy-saving low-voltage mutual inductor type metering box according to claim 4, characterized in that, Mounting holes (506) are formed at the four corners of the mounting plate (503), and the bottom of the insertion rod (509) is engaged with the engaging hole (505).

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