JP-2026075023-A - Distribution box with leakage current limiting function

Abstract

[Problem] The present invention provides a distribution box equipped with a leakage current limiting function. [Solution] The invention includes a conductive inner box 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 box that protects the conductive inner box from the outside but is connected to ground G. [Selection Diagram] Figure 1

Inventors

• イ，ホ ソク

Assignees

• ビジョン テック コーポレーション

Dates

Publication Date

20260507

Application Date

20241220

Priority Date

20241021

Claims (3)

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. A distribution box with a leakage current limiting function, including a grounded outer box that protects the conductive inner box from the outside but is connected to ground G.
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.
3. A distribution box equipped with a leakage current limiting function is, A distribution box with a leakage current limiting function according to claim 1 or 2, further comprising an insulating inner box disposed between a conductive inner box and a grounded outer box, which electrically insulates the conductive inner box and the grounded outer box.

Description

This invention relates to leakage current limiting technology, and more particularly to a distribution box equipped with a leakage current limiting function. The applicant of this invention previously filed Korean Registered Patent No. 10-1625493 (published May 30, 2016), which describes how leakage current decreases as the difference in the area ratio between two flat conductive materials increases. This technology prevents electric shock by limiting the leakage current using the difference in the area of conductive electrodes. The inventors have conducted research on a distribution box equipped with a leakage current limiting function, which includes 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 the leakage current. Korean Registered Patent No. 10-1625493 (Published May 30, 2016) 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. Industrial applicability 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. In describing the present invention, if it is determined that a specific description of a related known function or configuration would unnecessarily obscure the gist of the embodiments of the present invention, such detailed description will be omitted. When a 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. 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. 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. 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. 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. The conductive internal casing 130 houses the main circuit breaker 110 and multiple distribution circuit breakers 120. It is electrically connected to the neutral wire N of the main circuit breaker 110 or at least one distribution circuit breaker 120 line, thereby expanding the area of the neutral wire and limiting leakage current. For example, the electrical connection between the neutral wire N of the main circuit breaker 110 or at least one distribution circuit breaker 120 line and the conductive internal casing 130 can be implemented via conductive vias (not shown), but is not limited to this configuration. The conductive inner casing 130 increases the area of the neutral wire N compared to the area of the phase voltage lines R, S, and T of the main circuit breaker 110 or distribution circuit breaker 120 line. This creates an area difference between the phase voltage lines R, S, and T and the neutral wire N. The larger this area difference, the smaller the leakage current becomes. A smaller leakage current reduces the risk of electric shock, thus providing a leakage current limiting function that eliminates the risk of electric shock. The reason for this is that, as described in prior art, such as Korean Registered Patent No. 10-1404806 (published May 30, 2014), the larger the area of the flat conductor connected to the (-) end of the power supply (corresponding to the neutral wire and the conductive inner casing electrically connected thereto in this invention) compared to the flat conductor connected to the (+) end of the power supply (corresponding to the phase voltage line of this invention), the smaller the leakage current becomes. The grounding outer casing 140 protects the conductive inner casing 130 from the outside