Distribution box with leakage current limiting function

Abstract

The present invention provides a distribution box equipped with a leakage current limiting function. [Solution] The invention includes a conductive inner casing electrically connected to the neutral wire N of the main circuit breaker or at least one distribution circuit breaker line, which expands the area of ​​the neutral wire to limit leakage current, and a grounding outer casing that protects the conductive inner casing from the outside but is connected to ground G.

Description

[[Technical Field]]

[0001] The present invention relates to leakage current limiting technology, and particularly to a distribution box provided with a leakage current limiting function. [[Background Art]]

[0002] Korean Registered Patent No. 10-1625493 (published on May 30, 2016), previously filed by the applicant of the present invention, describes that leakage current decreases as the difference in area ratio between two plate-shaped conductors increases. This technology prevents electric shock by limiting leakage current using the difference in area of conductor electrodes.

[0003] The present inventor has conducted research on a distribution box provided with a leakage current limiting function that includes a conductive inner box electrically connected to the neutral line N of a main circuit breaker or at least one distribution breaker line, and that limits leakage current by expanding the area of the neutral line. [[Prior Art Documents]] [[Patent Documents]]

[0004] [[Patent Document 1]] Korean Registered Patent No. 10-1625493 (published on 2016.05.30) [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0005] An object of the present invention is to provide a distribution box provided with a leakage current limiting function, which includes a conductive inner box electrically connected to the neutral line N of a main circuit breaker or at least one distribution breaker line, the conductive inner box expanding the area of the neutral line to limit leakage current, and the conductive inner box being implemented to have high corrosion resistance. [[Means for Solving the Problem]]

[0006] According to one aspect of the present invention for achieving the aforementioned objectives, a distribution box equipped with a leakage current limiting function includes a main circuit breaker that shuts off power distributed from a power line, a plurality of distribution circuit breakers that shut off each power distributed from the power line to terminal loads, a conductive inner box that houses the main circuit breaker and the plurality of distribution circuit breakers, is electrically connected to the neutral wire N of the main circuit breaker or at least one distribution circuit breaker line, expands the area of ​​the neutral wire to limit leakage current, and a grounded outer box that protects the conductive inner box from the outside but is connected to ground G.

[0007] According to an additional aspect of the present invention, the conductive internal casing can be embodied as a conductor containing a corrosion-resistant carbon steel or stainless steel material.

[0008] According to an additional aspect of the present invention, the distribution box with a leakage current limiting function may further include an insulating inner box positioned between the conductive inner box and the grounded outer box, which electrically insulates the conductive inner box and the grounded outer box. [Effects of the Invention]

[0009] The present invention enables efficient limiting of leakage current by including a conductive internal box that is electrically connected to the neutral wire N of the main circuit breaker or at least one distribution circuit breaker line and expands the area of ​​the neutral wire to limit the leakage current, and by making the conductive internal box corrosion-resistant, stable leakage current limiting operation can be ensured. [Brief explanation of the drawing]

[0010] [Figure 1] This is a plan cross-sectional view showing the configuration of one embodiment of a distribution box equipped with a leakage current limiting function according to the present invention. [Modes for carrying out the invention]

[0011] The present invention will be described in detail below with reference to the attached drawings, through preferred embodiments, so that those skilled in the art can easily understand and reproduce it. While specific embodiments are shown in the drawings and described in detail, this is not intended to limit the various embodiments of the present invention to any particular form.

[0012] In describing the present invention, if it is determined that a specific description of a relevant known function or configuration would unnecessarily obscure the gist of the embodiments of the present invention, such detailed description will be omitted.

[0013] When one component is described as being "linked" or "connected" to another component, it should be understood that it is directly linked to or potentially connected to the other component, but that other components may exist in between.

[0014] On the other hand, when one component is described as being "directly connected" or "directly linked" to another component, it should be understood that there are no other components in between.

[0015] Figure 1 is a plan cross-sectional view showing the configuration of one embodiment of a distribution box equipped with a leakage current limiting function according to the present invention. As shown in Figure 1, the distribution box 100 equipped with a leakage current limiting function according to this embodiment includes a main circuit breaker 110, a plurality of distribution circuit breakers 120, a conductive inner casing 130, and a grounding outer casing 140.

[0016] The main circuit breaker 110 interrupts the power supply distributed from the power lines (not shown). When the main circuit breaker 110 is tripped automatically or manually in an emergency, the power supply to all end loads (not shown) is interrupted.

[0017] Multiple distribution circuit breakers 120 interrupt each power source that is distributed from the power line to the end loads. In an emergency, each of the distribution circuit breakers 120 is automatically or manually tripped, interrupting the power supply to each end load.

[0018] The conductive inner box 130 accommodates a main circuit breaker 110 and a plurality of distribution circuit breakers 120, and is electrically connected to the neutral line N of the line of the main circuit breaker 110 or at least one distribution circuit breaker 120, expanding the area of the neutral line to limit leakage current. For example, the present invention can be embodied such that the neutral line N of the line of the main circuit breaker 110 or at least one distribution circuit breaker 120 and the conductive inner box 130 are electrically connected via a conductive via (not shown), but is not limited thereto.

[0019] By means of the conductive inner box 130, the area of the neutral line N becomes larger compared to the area of the phase voltage lines R, S, T of the line of the main circuit breaker 110 or the distribution circuit breaker 120, resulting in an area difference between the phase voltage lines R, S, T and the neutral line N. The larger the area difference is, the smaller the leakage current becomes; and the smaller the leakage current is, the lower the risk of electric shock is, thereby providing a leakage current limiting function that eliminates the risk of electric shock.

[0020] The reason for this is that, as described in Korean Registered Patent No. 10-1404806 (published on May 30, 2014) mentioned in the prior art, the larger the area of the plate-shaped conductor connected to the negative terminal (corresponding to the neutral line of the present invention and the conductive inner box electrically connected thereto) is compared with the plate-shaped conductor connected to the positive terminal of the power supply (corresponding to the phase voltage line of the present invention), the smaller the leakage current becomes.

[0021] The grounding outer box 140 protects the conductive inner box 130 from the outside and is connected to the ground G. In this case, the material of the grounding outer box 140 may be an insulating material such as plastic, or a conductive material such as metal.

[0022] When a ground fault current occurs in the grounding outer box 140, the ground fault current flows into the neutral line N of the line of the main circuit breaker 110 or at least one distribution circuit breaker 120 via the ground G, thereby preventing electric shock.

[0023] With this implementation, the present invention can efficiently limit leakage current by implementing a distribution box that includes an inner conductive box electrically connected to the neutral line N of the main circuit breaker or at least one distribution breaker line, which limits leakage current by expanding the cross-sectional area of the neutral line.

[0024] Meanwhile, according to an additional aspect of the present invention, the inner conductive box 130 can be embodied as a conductor including corrosion-resistant carbon steel or stainless steel material. Carbon Steel is an alloy of iron and carbon that is more resistant to corrosion than ordinary steel, while Stainless Steel is an alloy steel containing chromium that does not corrode itself.

[0025] With this implementation, the present invention can not only efficiently limit leakage current through the inner conductive box, but also ensure stable leakage current limiting operation by embodying the inner conductive box as a conductor including corrosion-resistant carbon steel or stainless steel material.

[0026] Meanwhile, according to an additional aspect of the present invention, the distribution box 100 having a leakage current limiting function may further include a middle insulator box 150. The middle insulator box 150 is disposed between the inner conductive box 130 and the grounded outer box 140, and provides electrical insulation between the inner conductive box 130 and the grounded outer box 140.

[0027] For example, the material of the middle insulator box 150 may be an insulating material such as plastic, and an opening-closing door may be formed on the front surface of the distribution box 100 of regular hexahedron or cuboid shape, which is formed by sequentially laminating the inner conductive box 130, the middle insulator box 150, and the grounded outer box 140 from the inside out.

[0028] As described above, the present invention can efficiently limit leakage current by implementing a distribution box that includes an inner conductive box electrically connected to the neutral line N of the main circuit breaker or at least one distribution breaker line, which limits leakage current by expanding the cross-sectional area of the neutral line, and can ensure stable leakage current limiting operation by embodying the inner conductive box to be corrosion-resistant.

[0029] The various embodiments disclosed herein and in the drawings are presented as specific examples for the sake of understanding and are not intended to limit the scope of the various embodiments of the present invention.

[0030] Therefore, the scope of the various embodiments of the present invention should be interpreted as including, in addition to the embodiments described herein, all modifications or altered forms derived based on the technical idea of ​​the various embodiments of the present invention. Industrial Applicability

[0031] This invention is industrially applicable in the field of electrical distribution box-related technology and its application fields. [Explanation of Symbols]

[0032] 100: Distribution box 110: Main circuit breaker 120: Distribution circuit breaker 130: Conductive internal box 140: Grounded outer box 150: Insulator box

Claims

1. The main circuit breaker cuts off the power supply distributed from the power lines, Multiple distribution circuit breakers that interrupt each power source that is distributed from the power line to the end loads, The main circuit breaker and multiple distribution circuit breakers are housed within a conductive internal casing that is electrically connected to the neutral wire N of the main circuit breaker or at least one distribution circuit breaker line, and expands the area of ​​the neutral wire to limit leakage current. The conductive inner casing is protected from the outside, but the grounding outer casing is connected to ground G, An insulating inner box is placed between the conductive inner box and the grounded outer box to electrically insulate the conductive inner box and the grounded outer box, A distribution box equipped with a leakage current limiting function.

2. The conductive internal casing is, A distribution box equipped with a leakage current limiting function according to claim 1, which is embodied as a conductor containing a corrosion-resistant carbon steel or stainless steel material.

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