Electric meter box

Abstract

The utility model provides an electric meter box which comprises a box body, and a miniature circuit breaker, an alternating current lightning protection device, a recloser, a disconnecting link, a mutual inductor, a first copper bar, a second copper bar, a third copper bar, a fourth copper bar and a fifth copper bar are installed in the box body. The four lines L1, L2, L2 and N are arranged in the box body to transmit electric energy, traditional cables are replaced by the first copper bar, the second copper bar and the third copper bar to transmit power, the thickness of the cables is not increased while four-way power transmission is guaranteed, more space is saved for the interior of the box body, and the power transmission efficiency is improved. The third copper bar, the second copper bar, the fifth copper bar and the disconnecting link are fixed through bolts and nuts, the third copper bar can be integrally detached after the transparent protection plate is detached, the mutual inductor can be conveniently maintained or replaced, and intensity signals of current and voltage can be sent to a background through a signal collector, so that the mutual inductor is convenient to maintain and replace. Therefore, the electric energy transmission condition of photovoltaic power generation can be monitored at any time.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic power generation meter boxes, in particular to an electricity meter box. Background Art

[0002] The meter box is a device used to store electricity meters and is one of the indispensable devices in the power system. For photovoltaic power generation applications, when the photovoltaic panels are generating electricity, the back-end needs to use the meter box for power supply, protection, control and monitoring to facilitate the management of the photovoltaic panels' power generation.

[0003] Currently, electricity is mostly transmitted through two or three cables inside the meter box during photovoltaic power generation. If additional cable lines are required, the thickness of the cables will increase, thereby limiting the internal space of the meter box. Utility Model Content

[0004] The purpose of the present utility model is to provide an electric meter box to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An electric meter box comprises a box body, wherein a miniature circuit breaker, an AC lightning arrester, a reclosing switch, a knife switch, a mutual inductor, a first copper bar, a second copper bar, a third copper bar, a fourth copper bar and a fifth copper bar are installed inside the box body, wherein four of the first copper bar, the second copper bar, the third copper bar, the fourth copper bar and the fifth copper bar are provided, one end of the four fourth copper bars is connected to the reclosing switch, the other end of the four fourth copper bars is connected to the first copper bar via bolts and nuts, the other end of the four first copper bars is connected to the second copper bar via bolts and nuts, one end of the second copper bar is connected to one end of the third copper bar via bolts and nuts, one end of the third copper bar is connected to one end of the fifth copper bar via bolts and nuts, the other end of the fifth copper bar is connected to the knife switch, the third copper bar passes through the mutual inductor, a bottom plate is installed inside the box body, and the mutual inductor is mounted on the bottom plate.

[0007] Preferably, four of the first copper bars are stacked inside the box, and two adjacent first copper bars are separated by insulating columns.

[0008] Preferably, a transparent protective plate is fixedly installed inside the box by screws, and the transparent protective plate covers the surface of the mutual inductor.

[0009] Preferably, a handle is installed on the side of the box body, and a wire hole is provided on the bottom surface of the box body.

[0010] Preferably, a first connection seat and a second connection seat are welded on the side surface of the box body. A round hole is arranged on the surface of the first connection seat, and a notch is arranged on the surface of the second connection seat.

[0011] Preferably, a junction box, an electric meter body and a signal collector are also installed inside the box body.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] In this utility model, four circuits of L1, L2, L2 and N lines are arranged inside the box body to transmit electric energy. The first copper bar, the second copper bar and the third copper bar are used to replace the traditional cable power transmission. While ensuring four-way power transmission, it will not cause an increase in the thickness of the cable, thus saving more space inside the box body. Moreover, the third copper bar, the second copper bar and the fifth copper bar and the knife switch are fixed by bolts and nuts. After removing the transparent protection plate, the third copper bar can be removed as a whole, so as to facilitate the maintenance or replacement of the mutual inductor. And through the signal collector, the intensity signals of current and voltage can be sent to the background, so as to monitor the electric energy transmission situation of photovoltaic power generation at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 is a schematic diagram of the front structure of the box body of the utility model;

[0017] Figure 4 is a schematic diagram of the connection structure of the first copper bar, the second copper bar and the third copper bar of the utility model;

[0018] Figure 5 is the electrical schematic diagram of the utility model.

[0019] In the figure: 1. Box body; 2. Miniature circuit breaker; 3. AC lightning arrester; 4. Recloser; 5. Knife switch; 6. Mutual inductor; 7. First copper bar; 8. Second copper bar; 9. Third copper bar; 10. Insulating column; 11. Transparent protection plate; 12. Handle; 13. Wire passing hole; 14. First connection seat; 15. Second connection seat; 16. Round hole; 17. Notch; 18. Junction box; 19. Electric meter body; 20. Signal collector; 21. Fourth copper bar; 22. Fifth copper bar; 23. Bottom plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

[0021] Please refer to Figures 1-5 , the present utility model provides an electric meter box, which includes a box body 1. Inside the box body 1, a miniature circuit breaker 2, an AC lightning arrester 3, a reclosing switch 4, a knife switch 5, a current transformer 6, a first copper bar 7, a second copper bar 8, a third copper bar 9, a fourth copper bar 21, a fifth copper bar 22, an electric meter body 19, a signal collector 20 and a junction box 18 are installed. There are four of each of the first copper bar 7, the second copper bar 8, the third copper bar 9, the fourth copper bar 21 and the fifth copper bar 22. One end of the four fourth copper bars 21 is connected to the reclosing switch 4, and the other ends of the four fourth copper bars 21 are connected to the first copper bar 7 through bolts and nuts. The four first copper bars 7 are stacked inside the box body 1, and adjacent two first copper bars 7 are separated by insulating columns 10. The other ends of the four first copper bars 7 are connected to the second copper bar 8 through bolts and nuts. One end of the second copper bar 8 is connected to one end of the third copper bar 9 through bolts and nuts. One end of the third copper bar 9 is connected to the fifth copper bar 22 through bolts and nuts. The other end of the fifth copper bar 22 is connected to the knife switch 5 through bolts and nuts. The third copper bar 9 passes through the current transformer 6. A bottom plate 23 is installed inside the box body 1, and the current transformer 6 is installed on the bottom plate 23.

[0022] Please refer to Figures 2-4 , the reclosing switch 4 is used for overvoltage protection and undervoltage protection. The current transformer 6 is used to measure the voltage and current of L1, L2 and L3 on the third copper bar 9, and send the intensity signals of the voltage and current to the signal collector 20, and finally send them to the background system through the signal collector 20, so as to facilitate the background monitoring of the voltage and current fluctuations. The backend transmission of electric energy in photovoltaic power generation is realized through the first copper bar 7, the second copper bar 8, the third copper bar 9, the fourth copper bar 21 and the fifth copper bar 22. It not only realizes the phase-by-phase transmission of electric energy, but also does not compress the internal space of the box body 1 due to the large thickness of the cable. During daily use, the third copper bar 9 can be disassembled from between the second copper bar 8 and the fifth copper bar 22 through bolts and nuts, so as to remove the current transformer 6 from the third copper bar 9, so as to facilitate the maintenance or replacement of the current transformer 6.

[0023] It should be noted that the four first copper bars 7 are separated by insulating columns 10, which reduces the occupied area in the vertical plane and further saves the internal space of the box body 1.

[0024] Inside the box body 1, a transparent protective plate 11 is fixedly installed by screws, and the transparent protective plate 11 covers the surface of the mutual inductor 6.

[0025] Please refer to Figure 2 and Figure 3 , the setting of the transparent protective plate 11 can block the mutual inductor 6, so as to protect the mutual inductor 6, the third copper row 9 and the second copper row 8.

[0026] A handle 12 is installed on the side of the box body 1, and a wire passing hole 13 is provided on the bottom surface of the box body 1.

[0027] Please refer to Figure 1 , the setting of the handle 12 facilitates the overall handling of the box body 1, and the setting of the wire passing hole 13 facilitates the external line to enter the box body 1 and be connected to the reclosing switch 4.

[0028] A first connecting seat 14 and a second connecting seat 15 are welded on the side of the box body 1. A round hole 16 is provided on the surface of the first connecting seat 14, and a notch 17 is provided on the surface of the second connecting seat 15.

[0029] Please refer to Figure 2 and Figure 3 , when installing the box body 1, first fix the bolts on the wall, then hang the first connecting seat 14 on the bolts through the notch 17, and then install the first connecting seat 14 on the wall by passing additional bolts through the round hole 16, thus realizing the overall installation of the box body 1.

[0030] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric meter box, comprising a box body (1), characterized in that: The box (1) is internally installed with a miniature circuit breaker (2), an AC lightning arrester (3), a reclosing switch (4), a knife switch (5), a mutual inductor (6), a first copper bar (7), a second copper bar (8), a third copper bar (9), a fourth copper bar (21) and a fifth copper bar (22). Four of the first copper bar (7), the second copper bar (8), the third copper bar (9), the fourth copper bar (21) and the fifth copper bar (22) are provided. One end of the four fourth copper bars (21) is connected to the reclosing switch (4), and the other end of the four fourth copper bars (21) is connected to the first copper bar (7) by bolts and nuts. The first copper bar (7) is connected to the first copper bar (7), the other end of the four first copper bars (7) is connected to the second copper bar (8) through bolts and nuts, one end of the second copper bar (8) is connected to one end of the third copper bar (9) through bolts and nuts, one end of the third copper bar (9) is connected to one end of the fifth copper bar (22) through bolts and nuts, the other end of the fifth copper bar (22) is connected to the knife switch (5), the third copper bar (9) passes through the mutual inductor (6), a bottom plate (23) is installed inside the box (1), and the mutual inductor (6) is installed on the bottom plate (23).

2. An electric meter box according to claim 1, characterized in that: Four of the first copper bars (7) are stacked inside the box (1), and two adjacent first copper bars (7) are separated by insulating columns (10).

3. The electric meter box according to claim 1, characterized in that: A transparent protective plate (11) is fixedly installed inside the box (1) by screws, and the transparent protective plate (11) covers the surface of the mutual inductor (6).

4. The electric meter box according to claim 1, characterized in that: A handle (12) is installed on the side of the box body (1), and a wire hole (13) is provided on the bottom surface of the box body (1).

5. The electric meter box according to claim 1, characterized in that: A first connecting seat (14) and a second connecting seat (15) are welded to the side of the box body (1); a circular hole (16) is provided on the surface of the first connecting seat (14), and a notch (17) is provided on the surface of the second connecting seat (15).

6. The electric meter box according to claim 1, characterized in that: A junction box (18), an electric meter body (19) and a signal collector (20) are also installed inside the box (1).

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