Grid connection distribution box

Abstract

This invention discloses a power grid connection distribution box, comprising: a housing having an internal space; a power grid module disposed in the internal space and having a main input terminal, wherein main power is input to the main input terminal; a control module disposed adjacent to the power grid module and having a control board and sub-input terminals, the control board being connected to the power grid module, wherein at least one sub-power is input to the sub-input terminal; a transformer installed in the internal space, connected to the control board and configured to convert voltage; and a signal processing module disposed on the transformer to overlap with the transformer, connected to the control board and configured to process electrical signals.

Description

Technical Field

[0001] This disclosure relates to a power grid connection distribution box with a fixed structure for a signal processing module. Background Technology

[0002] Since distribution boxes are considered electrical devices used to branch and distribute electricity to multiple electricity consumers, they traditionally consist of a metal enclosure, a main circuit breaker connected to the grid, multiple branch circuit breakers, and busbars connecting these components.

[0003] Recent distribution boxes have evolved beyond simple power distribution functions and are implementing various intelligent functions according to their purpose. For example, there are grid-connected distribution boxes that connect to multiple power grids to exchange power with each other.

[0004] However, the components of the distribution box in related technologies are already assembled in the order of the manufacturing process and arranged coplanarly with each other. Therefore, when the parts related to communication processing and voltage conversion are installed inside the housing, unusable space is created inside the housing, which reduces space utilization. In some embodiments, due to the depth placement of the working position, there is a possibility of incorrect assembly and the disadvantage of complicated post-processing. Summary of the Invention

[0005] The purpose of this invention is to provide a power grid connection distribution box that improves space utilization and ease of operation.

[0006] One aspect of this disclosure provides a power grid connection distribution box, comprising: a housing having an internal space; a power grid module disposed in the internal space and having a main input terminal to which main power is input; a control module disposed adjacent to the power grid module and having a control board and sub-input terminals, the control board being connected to the power grid module, at least one sub-power being input to the sub-input terminals; a transformer mounted in the internal space, connected to the control board, and configured to convert voltage; and a signal processing module disposed on the transformer to overlap with the transformer, connected to the control board, and configured to process electrical signals.

[0007] In some embodiments, the signal processing module may include: a base plate mounted on a transformer; a substrate mounting base disposed on the base plate and a first signal processing substrate disposed on the substrate mounting base; and a shielding cover covering the upper portion of the substrate mounting base.

[0008] In some embodiments, the second signal processing substrate may be mounted on a base plate adjacent to the substrate mounting base and the shield.

[0009] In some embodiments, the shield may have wire holes through which wires connecting the first signal processing substrate to the second signal processing substrate pass.

[0010] In some embodiments, the internal space provided by assembling the substrate mounting base and the shield can form a shielding space configured to block electromagnetic radiation from the first signal processing substrate.

[0011] In some embodiments, the shield may include aluminum.

[0012] In some embodiments, the shield may have at least one wire hole through which wires connecting the control substrate to the first signal processing substrate pass.

[0013] In some embodiments, the signal processing module may be spaced at a predetermined height from the inner peripheral surface of the housing.

[0014] In some embodiments, the signal processing module may have a notch in which a portion of the base plate mounted on the transformer is cut to expose multiple terminals of the transformer.

[0015] In some embodiments, the power grid connection distribution box may further include a neutral module, which is configured to be adjacent to the control module and face the signal processing module.

[0016] In some embodiments, the neutral module and the signal processing module may be located on opposite sides of the control module, and the power grid module may be located between the neutral module and the signal processing module along one side of the control module. Attached Figure Description

[0017] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic block diagram illustrating a power grid connection distribution box according to an embodiment of the present disclosure; Figure 2 This is a perspective view illustrating an embodiment of a power grid connection distribution box; Figure 3 yes Figure 2 An exploded perspective view of a portion of the power grid connection distribution box; Figure 4 It is shown Figure 3 A view of the power grid module and relay module; Figure 5 It is when the power grid module and relay module are assembled along Figure 3 A cross-sectional view taken by line V-V'; Figure 6 It is shown Figure 3The view of the control module; Figure 7 It is shown Figure 3 A view of the neutral module; Figure 8 This is a cross-sectional view showing adjacent portions of the neutral module and the control module; Figure 9 yes Figure 2 An exploded perspective view of the signal processing module and transformer; Figure 10 This shows the signal processing module and transformer assembled in... Figure 2 A view of the power grid connection distribution box; Figure 11 yes Figure 10 An enlarged view of part A shown; Figure 12 It is shown Figure 2 A schematic diagram of the circuit of the power grid connection distribution box. Detailed Implementation

[0018] Because this disclosure can be applied in various variations and has various embodiments, specific embodiments will be shown in the accompanying drawings and described in detail in the detailed description. The effects and features of this disclosure, as well as methods of implementing them, will become clear by referring to the embodiments described in detail below in conjunction with the accompanying drawings. However, this disclosure is not limited to the embodiments disclosed below and can be implemented in various forms.

[0019] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When describing the contents with reference to the drawings, the same or corresponding parts will be given the same reference numerals, and repeated descriptions will be omitted.

[0020] In the following embodiments, the terms "first," "second," etc., are not intended to be limiting, but are used to distinguish one component from another.

[0021] In the following embodiments, unless the context clearly indicates otherwise, expressions used in the singular such as “a,” “an,” and “the” are also intended to include the plural forms.

[0022] In the following embodiments, it will be understood that terms such as “comprising,” “including,” and “having” specify the presence of the said feature or component, but do not exclude the presence or addition of one or more other features or components.

[0023] In the following embodiments, when a region, component, etc. is located on or above another component, this disclosure includes not only the case where the region, component, etc. is directly above another component, but also the case where other regions, other components, etc. can be located in between.

[0024] In the accompanying drawings, the dimensions of the components may be enlarged or reduced for ease of description. For example, the dimensions and thicknesses of each component shown in the drawings are arbitrarily illustrated for ease of description, and therefore this disclosure is not necessarily limited to what is shown.

[0025] In the following embodiments, it will be understood that when a region, component, etc. is referred to as being connected to another component, it can be directly connected to the other component, or there may be an intermediate component.

[0026] Figure 1 This is a schematic block diagram illustrating a power grid connection distribution box 1 according to an embodiment of the present disclosure. Figure 2 This is a perspective view showing an embodiment of the power grid connection distribution box 1.

[0027] refer to Figure 1 The power grid connection distribution box 1 can be electrically connected to the main power supply GRID, one or more sub-power supplies E1 and E2, and multiple loads (load 1 and load 2), and can control the power flow. The power grid connection distribution box 1 can distribute the power input from the main power supply GRID or sub-power supplies E1 and E2, and supply the input power to the loads (load 1 and load 2).

[0028] According to an embodiment, the main power grid can be a power grid that includes infrastructure systems for generating, transmitting, and distributing electricity. For example, the main power grid may include power plants, substations, power line networks, etc.

[0029] Sub-power supplies E1 and E2 can be configured as power supplies or systems of a different type than the main power supply GRID.

[0030] As an example, sub-power sources E1 and E2 can be configured as photovoltaic (PV) power generation systems. Each sub-power source E1 and E2 can be a PV power generation system, comprising a PV module and equipment connected to the PV module. A PV module is a power generation device installed on the roof or exterior wall of a building, converting sunlight into electrical energy through the photovoltaic effect. The equipment can be a power conversion system (PCS) or a power conditioning system (PCS) that performs power conversion on the electricity generated by the PV module. In some embodiments, the equipment can be module-level power electronics (MLPE). This equipment can be an optimizer or a micro-inverter (MI).

[0031] Optionally, sub-power supplies E1 and E2 may each further include a coupler connected to a device. At least some devices can be connected to the grid connection distribution box 1 via the coupler. For example, the coupler can combine power output from multiple devices into a single output power. The power combined by the coupler can then be supplied to the grid connection distribution box 1.

[0032] As another example, sub-power sources E1 and E2 can be provided as energy storage systems (ESSs). Sub-power sources E1 and E2 can store electricity generated by photovoltaic modules or supplied from the power grid, and can efficiently supply power to the grid-connected distribution box 1 according to the needs of the loads (load 1 and load 2). Sub-power sources E1 and E2 can each include a battery for storing electricity and a power conversion module. The power conversion module can be a PCS that performs the conversion between battery-side power and relative-side power. In this case, the PCS can include a bidirectional DC-to-DC converter connected to the battery to convert the voltage, and a device including a bidirectional inverter that connects the bidirectional DC-to-DC converter to the outside of the ESS.

[0033] Load 1 and Load 2 each refer to equipment installed in electricity consumers such as residences, commercial facilities, or factories, and operating by receiving electrical energy distributed via the grid connection distribution box 1. That is, Load 1 and Load 2 can include various types of equipment, gear, facilities, etc., that operate by receiving electrical energy supplied from the main power source GRID or sub-power sources E1 and E2.

[0034] According to embodiments of this disclosure, the grid connection distribution box 1 can be connected to the power grid as the main power source GRID, to the photovoltaic power generation system as the first sub-power source E1, and to the ESS as the second sub-power source E2. The grid connection distribution box 1 can control the voltage, current, and / or power output from or supplied to each component based on the power supply status of the main power source GRID and / or the sub-power sources E1 and E2.

[0035] Reference Figure 1 and Figure 2 In the power grid connection distribution box 1, the housing 10 with internal space can be configured to be opened or closed by a cover 11, and components can be installed in the internal space of the housing 10.

[0036] The power grid connection distribution box 1 may include a power grid module 100, a relay module 200, a control module 300, a neutral module 400, a blocking module 500, a signal processing module 600, and a transformer 700 inside the housing 10.

[0037] The power grid module 100 can be housed inside the housing 10 and can be connected to the main power supply GRID, and can supply power to at least one load. The power grid module 100 can receive power from the main power supply GRID and can distribute power to at least one load. For example, the power grid module 100 can supply power to a first load (load 1) and / or a second load (load 2).

[0038] The relay module 200 can be located on one side of the power grid module 100 and can be assembled together with the power grid module 100. The relay module 200 can be electrically connected to the control module 300. The relay module 200 can control the power supply to the power grid module 100 through the control module 300. The relay module 200 can connect or disconnect the power circuit according to the control signals of the control module 300.

[0039] The control module 300 can be connected to at least one sub-power source. For example, the control module 300 can be connected to at least one of the first sub-power source E1 and the second sub-power source E2 to receive power.

[0040] The sub-power supply can be configured as an emergency power supply for generator equipment, power generation system inverter, or ESS. However, one or more embodiments are not limited to this, and any power supply can be used as the sub-power supply, as long as it can provide stable AC power to the control module 300.

[0041] The control module 300 can be connected to the relay module 200 and can perform control to transmit power supplied from the sub-power source to the grid module 100 via the relay module 200. Through the control module 300, the grid module 100 can transmit power supplied from the sub-power source to the load.

[0042] The neutral module 400 can be electrically connected to the control module 300 and can be disposed adjacent to the power grid module 100. The neutral module 400 can be connected to the neutral line of the main power grid and the neutral line of the load, thereby fixing these neutral lines.

[0043] In one embodiment, the grid module 100 can be connected to the active line of the main power supply GRID to allow power input. The grid module 100 can also be connected to the active line of the loads (load 1 and load 2) to allow power output. In this case, the neutral module 400 can be connected to the common neutral line of the main power supply GRID to allow power input. The neutral module 400 can also be connected to the loads (load 1 and load 2) to allow power output. The grid connection distribution box 1 can receive and distribute power at a constant voltage by the phase voltage generated between the active and neutral lines.

[0044] The blocking module 500 may include a typical circuit breaker to block power transmission in the power grid connection distribution box 1. The blocking module 500 may be electrically connected to the control module 300, and can disconnect the power supply when an abnormality occurs.

[0045] According to an embodiment, the blocking module 500 can be disposed on the control module 300 to overlap with the control module 300. For example... Figure 2 As shown, the blocking module 500 can be set and stacked on the control module 300, so that the power grid connection distribution box 1 can have a simple internal structure and a compact size.

[0046] The signal processing module 600 can be electrically connected to the control module 300 and can perform signal processing according to control signals. The signal processing module 600 can convert power supplied by the main power supply GRID or sub-power supplies E1 and E2. In some embodiments, the signal processing module 600 can control compatibility with different circuits or external systems. The signal processing module 600 will be described in detail below.

[0047] The transformer 700 can be housed within the interior space of the housing 10. As an example, the transformer 700 can be provided as a typical autotransformer. The transformer 700 can be connected to the control module 300 and can supply phased power from the power grid module 100 to the first load (load 1) and the second load (load 2) according to control signals.

[0048] In this configuration, a heat dissipation structure (not shown) can be formed on the surface of the housing 10 facing the transformer 700. The heat dissipation structure can be integrally formed with the housing 10. The heat dissipation structure can be configured to dissipate heat generated from the outside when the transformer 700 and other internal components are in operation.

[0049] According to an embodiment, the signal processing module 600 can be configured to be spaced apart from the inner peripheral surface of the housing 10 by a predetermined height. The signal processing module 600 can be mounted on the transformer 700 to overlap with it. Figure 2 As shown, the signal processing module 600 can have a structure that overlaps with the transformer 700, so that when maintenance and replacement work is required on the corresponding parts, the work position can be set on the upper side of the housing 10, thereby improving the convenience of operation. In some embodiments, due to the overlapping structure of the signal processing module 600 and the transformer 700, the power grid connection distribution box 1 can have a simple internal structure and a compact size.

[0050] Optionally, the power grid connection distribution box 1 may further include a grounding module 800. The grounding module 800 can connect the circuit to ground via wires and allows current to flow to ground. When an abnormal voltage occurs, the grounding module 800 allows current to flow to ground, thereby allowing the devices to maintain the same potential.

[0051] Figure 3 yes Figure 2 An exploded perspective view of a portion of the power grid connection distribution box 1.

[0052] refer to Figure 3 The power grid module 100, relay module 200, control module 300 and neutral module 400 can be arranged adjacent to each other.

[0053] For ease of description, in the following text, in the power grid connection distribution box 1, the side where the neutral module 400 is set is defined as the front side, and the side where the transformer 700 is set is defined as the rear side.

[0054] The power grid module 100 may have a first base 1001, and the power grid module 100 and the relay module 200 may be assembled such that the relay module 200 may be located on one side of the first base 1001.

[0055] The first substrate 1001 may have a step difference. In some embodiments, the first substrate 1001 may be formed in a shape that extends in the longitudinal direction of the housing 10 and may be disposed on the left side of the interior space of the housing 10.

[0056] The control module 300 may have a general plate shape and may be located on the right side of the interior space of the housing 10. The control module 300 may be arranged parallel to the power grid module 100 in the left-right direction.

[0057] The control module 300 may have a first base structure 3001, such that a first step 30021 may be formed on the front side of the first base structure, at least one sub-input terminal is mounted on the first step, and a power grid module support 30012 adjacent to the power grid module 100 may be formed on the side of the first base structure.

[0058] The first step 30021 can be formed to protrude upward from the base surface of the first base structure 3001. A cutout portion 30022 can be located below the first step 30021. The cutout portion 30022 can form a space recessed from the front surface of the first base structure 3001. The second base structure 4001 of the neutral module 400 can be partially inserted into the cutout portion 30022.

[0059] The first step 30021 can protrude from the bottom surface inside the housing 10, and therefore the sub-input terminal mounted on the first step 30021 can be positioned at the upper part of the housing 10. In some embodiments, when performing the operation of connecting wires to the sub-input terminal, the operation position can be provided on the upper side of the housing 10, thereby improving the convenience of the operation.

[0060] The power grid module support 30012 can be configured as a block protruding upward from the base surface of the first base structure 3001. The power grid module support 30012 can be inserted into the side surface of the first base 1001.

[0061] According to an embodiment, the facing surfaces of the first base 1001 and the first base structure 3001 can correspond to each other. The power grid module support 30012 can be inserted into the right side surface of the first base 1001. Therefore, the power grid module 100 and the control module 300 can at least partially overlap each other for a more compact installation.

[0062] The neutral module 400 can be formed to extend in the width direction of the housing 10 and can be disposed on the front side of the interior space of the housing 10. The neutral module 400 can be disposed adjacent to the control module 300 in the front-rear direction.

[0063] The neutral module 400 may have a second base structure 4001, such that the second step 40021 may be disposed on one side of the second plate 40011, and the neutral terminal mounting base 40031 may be disposed on the other side of the second plate 40011.

[0064] The second step 40021 may be located on one side of the front surface of the second base structure 4001. The second step 40021 may be formed to protrude upward from the second plate 40011 of the second base structure 4001.

[0065] The neutral terminal mounting base 40031 can be disposed on the other side of the second base structure 4001. The neutral terminal mounting base 40031 can be disposed on the second plate 40011 of the second base structure 4001.

[0066] In the second base structure 4001, the second plate 40011 can be inserted into the cutout portion 30022 of the first base structure 3001.

[0067] According to an embodiment, the facing surfaces of the first base structure 3001 and the second base structure 4001 can correspond to each other. The second plate 40011 of the second base structure 4001 can be inserted into the cutout portion 30022 of the first base 1001. Therefore, the control module 300 and the neutral module 400 can at least partially overlap each other for a more compact installation.

[0068] According to an embodiment, the second plate 40011 of the neutral module 400 can be configured to overlap with the first step 30021 of the control module 300. The power grid module support 30012 of the control module 300 can be inserted into the side surface of the power grid module 100. The relay module 200 can be assembled onto the power grid module 100.

[0069] Therefore, in the power grid connection distribution box 1 according to the embodiment, since the power grid module 100, relay module 200, control module 300 and neutral module 400 partially overlap each other, the internal modules can be installed more compactly.

[0070] Figure 4 It is shown Figure 3 A view of the power grid module 100 and the relay module 200. Figure 5 It is along when assembling the power grid module 100 and the relay module 200 Figure 3 A cross-sectional view taken by line V-V'.

[0071] Reference Figures 1 to 5 The power grid module 100 and the relay module 200 can be assembled together to form a circuit.

[0072] The power grid module 100 may include a first base 1001 having a step difference, and main input terminals 110 and one or more output terminals 130, 150 arranged at different horizontal heights along the step difference.

[0073] The power grid module 100 may include a main input terminal 110, a main input tab 120, a first output terminal 130, a first connector 140, a second output terminal 150, and a second connector 160.

[0074] According to an embodiment, the first substrate 1001 may include a main terminal mounting base 10011 forming the upper surface of the first substrate, a first output terminal mounting base 10021 disposed below the main terminal mounting base 10011, and a second output terminal mounting base 10022 disposed below the first output terminal mounting base 10021.

[0075] The main input terminal 110 can be mounted on the main terminal mounting base 10011, the first output terminal 130 can be mounted on the first output terminal mounting base 10021, and the second output terminal 150 can be mounted on the second output terminal mounting base 10022. That is, due to the structure of the first base 1001, the main input terminal 110, the first output terminal 130, and the second output terminal 150 can be set at different horizontal heights.

[0076] In another embodiment, the main input terminal 110 may be disposed on either the first output terminal mounting base 10021 or the second output terminal mounting base 10022, and the first output terminal 130 and the second output terminal 150 may be disposed on the remaining output terminal mounting bases and the main terminal mounting base 10011.

[0077] The first substrate 1001 may include insulating material. Therefore, the main input terminal 110, the first output terminal 130, and the second output terminal 150 mounted on the first substrate 1001 can form a circuit and prevent leakage current.

[0078] The first substrate 1001 may include a heat-resistant and chemically resistant material. Therefore, physical or chemical deformation of the first substrate 1001 due to heat generated from the main input terminal 110, the first output terminal 130, and the second output terminal 150 mounted on the first substrate 1001 can be prevented.

[0079] The power grid module 100 can form a circuit connected to the relay module 200 through the main input terminal 110, main input tab 120, first output terminal 130, first connector 140, second output terminal 150 and second connector 160 installed on the first base 1001.

[0080] The main input terminal 110 can be directly connected to the main power supply GRID to provide power. The main input terminal 110 can be connected to the active line of the main power supply GRID. The main input terminal 110 can be connected to the relay module 200 via the main input tab 120.

[0081] The main input tab 120 can be disposed on the main terminal mounting base 10011. The main input terminal 110 can be mounted on the main input tab 120. The main input tab 120 can have one end portion connected to the main input terminal 110 and another end portion connected to the first relay tab 220 of the relay module 200. Power input to the main input terminal 110 can be transmitted to the relay module 200 through the main input tab 120.

[0082] As a specific example, the main input terminal 110 may have a tab fixing portion 1201, which has a plate shape, such that the tab fixing portion 1201 can be disposed on the main terminal mounting base 10011. The main input terminal 110 can be mounted on the tab fixing portion 1201. In this case, the other end portion of the main input tab 120 may be formed to extend from the tab fixing portion 1201 toward the first relay tab 220.

[0083] The main input tab 120 may further include a current sensor CT. The current input to the main input terminal 110 can be measured at the main input tab 120 by the current sensor CT.

[0084] The first output terminal 130 can be connected to the first load (load 1) to supply power. The first output terminal 130 can be connected to the active line of the first load (load 1). The first output terminal 130 can be connected to the relay module 200 via the first connector 140.

[0085] The first connector 140 may be disposed on the first output terminal mounting base 10021. The first opening S1 may be formed to pass through the first output terminal mounting base 10021 in the longitudinal direction, so that the first connector 140 can be inserted into the first opening S1. The first connector 140 may be formed to extend through the first opening S1.

[0086] The first connector 140 may have one end portion connected to the first relay tab 220 of the relay module 200 and another end portion connected to the first output terminal 130. The first connector 140 may form a circuit connecting the main input terminal 110 to the first output terminal 130 via the first relay tab 220. Therefore, power supplied from the main power supply GRID can be distributed to the first load (load 1).

[0087] In some embodiments, another end portion of the first connector 140 may be bent upwards. The first connector 140 may have an upwardly bent end portion 1401 and a straight end portion 1402 extending in a straight line on the side opposite to the bent end portion 1401. Due to the shape of the bent end portion 1401, the first connector 140 can be fastened to the first relay tab 220 above the bottom surface of the first output terminal mounting base 10021 and can have a large separation distance from the second connector 160.

[0088] The second output terminal 150 can be connected to a second load (load 2) to supply power. The second output terminal 150 can be connected to the active line of the second load (load 2). The second output terminal 150 can be connected to the relay module 200 via the second connector 160.

[0089] The second connector 160 may be disposed on the second output terminal mounting base 10022. The second opening S2 may be formed to pass through the second output terminal mounting base 10022 in the longitudinal direction, so that the second connector 160 can be inserted into the second opening S2. The second connector 160 may be formed to extend through the second opening S2.

[0090] The second connector 160 may have one end portion that connects to the second relay tab 260 of the relay module 200 and another end portion that connects to the second output terminal 150. The second connector 160 may form a circuit connecting the relay module 200 and the second output terminal 150, thereby allowing power transmitted through the relay module 200 to be distributed to the second load (load 2).

[0091] In some embodiments, the second connector 160 may be configured as a linear terminal extending in two directions, and thus may have a relay-side end portion 1601 and a load-side end portion 1602. The second connector 160 may be mounted on the bottom surface of the second output terminal mounting base 10022 and may be stably mounted.

[0092] According to an embodiment, the second connector 160 may have a different length than the first connector 140. The length of the second connector 160 may be greater than the length of the first connector 140. In this case, in the first base 1001, the length of the second output terminal mounting base 10022 may be greater than the length of the first output terminal mounting base 10021.

[0093] Therefore, inside the housing 10, the first output terminal 130 can be located behind the second output terminal 150, and on the side opposite to the first output terminal 130, the relay-side end portion 1601 of the second connector 160 can be located behind the bent end portion 1401 of the first connector 140.

[0094] Due to the shape of the first base 1001 and the length difference between the first connector 140 and the second connector 160, the operations of assembling the second output terminal 150 to the second connector 160 and assembling the first output terminal 130 to the first connector 140 can each be easily performed during the assembly of the power grid module 100.

[0095] In some embodiments, during the assembly of the power grid module 100 and the relay module 200, the operations of connecting the second relay tab 260 to the relay-side end portion 1601 of the second connector 160 and connecting the first relay tab 220 to the bent end portion 1401 of the first connector 140 can each be easily performed.

[0096] The first base 1001 of the power grid module 100 may further include a relay mounting base 10012 protruding from the surface of the second output terminal mounting base 10022. The relay mounting base 10012 may support the relay module 200.

[0097] When the relay module 200 is assembled with the power grid module 100, the relay module 200 can be placed on the relay mounting base 10012 so that the assembly part with the power grid module 100 can be stably supported.

[0098] When one side of the relay module 200 is assembled with the power grid module 100, the other side of the relay module 200 can be connected to the control module 300. The relay module 200 can receive power from either the first sub-power source E1 or the second sub-power source E2 connected to the control module 300.

[0099] The relay module 200 can output power input to the main input terminal 110 to the first output terminal 130, and can output power input from the control module 300 to the second output terminal 150. In other words, the relay module 200 can separate the circuit that supplies power from the main power supply to the load from the circuit that supplies power from the sub-power supply to the load.

[0100] The relay module 200 may include a first relay 210, a first relay tab 220, a spacer 230, a connecting tab 240, a second relay 250, and a second relay tab 260.

[0101] The relay module 200 may include a first relay 210 and a second relay 250 stacked vertically. In the relay module 200, the first relay 210 may be connected to a first relay tab 220 to form a circuit, and the second relay 250 may be connected to a second relay tab 260 to form a circuit.

[0102] According to an embodiment, the first relay 210 can assemble the first relay tab 220 onto the first relay tab support 211. The first relay tab 220 can connect the first connector 140 and the main input tab 120 of the power grid module 100 to each other to form a power supply circuit for the main power GRID.

[0103] In this configuration, the second relay 250 can be assembled with the second relay tab 260 onto the second relay tab support 251. The second relay tab 260 can be connected to the second connector 160 of the power grid module 100 to form a power supply circuit for transmitting power from the control module 300 to the relay module 200 for either the first sub-power supply E1 or the second sub-power supply E2.

[0104] The connecting tab 240 may have a vertically extending shape to connect the first relay 210 to the second relay 250. In this case, a spacer 230 may be disposed between the first relay 210 and the second relay 250 to support the first relay 210 and the second relay 250 and maintain a separation space.

[0105] Figure 6 It is shown Figure 3 The view of the control module 300.

[0106] Reference Figure 1 and Figure 6 The control module 300 may include a first base structure 3001, and a control board 310, a first sub-input tab 320, a first sub-input terminal 330, a second sub-input tab 340 and a second sub-input terminal 350 disposed on the first base structure 3001.

[0107] The first base structure 3001 may include insulating material. Therefore, the control board 310, the first sub-input terminal 330 and the second sub-input terminal 350 mounted on the first base structure 3001 can form a circuit and prevent leakage current.

[0108] The first base structure 3001 may include heat-resistant and chemically resistant materials. Therefore, physical or chemical deformation of the first base structure 3001 due to heat generated from the control board 310, the first sub-input terminal 330, and the second sub-input terminal 350 mounted on the first base structure 3001 can be prevented.

[0109] According to an embodiment, the first base structure 3001 may include a first plate 30011, a power grid module support 30012, a first step 30021, a first column 30041, and a second column 30042.

[0110] The first base structure 3001 may have a step difference, such that the control board 310 and the first and second sub-input terminals 330 and 350 can be positioned at different horizontal heights and arranged so as not to overlap each other.

[0111] Already referenced Figure 3 The cutout portion 30022 of the first step 30021 and the power grid module support 30012 are described, so their descriptions will be omitted below.

[0112] The first plate 30011 may have a flat plate shape, and the control substrate 310 may be disposed on the first plate 30011.

[0113] The control board 310 can be configured as a circuit board that generates electrical signals for controlling the power grid connection distribution box 1. The control board 310 can generate control signals for the power grid module 100, relay module 200, control module 300, neutral module 400, blocking module 500, signal processing module 600, and transformer 700.

[0114] For example, the control board 310 can measure the input sub-power at the first sub-input terminal 330 and the second sub-input terminal 350. In some embodiments, the control board 310 can control the relay module 200 to switch the power supply circuit, thereby controlling the power transmitted to the load. In some embodiments, when an abnormality occurs in the current input to the grid module 100 and the neutral module 400 or the current output from the grid module 100 and the neutral module 400, the control board 310 can control the blocking module 500 to block the current. In some embodiments, the control board 310 can control the signal processing module 600 to process electrical signals generated inside the grid connection distribution box 1 or input from the outside. In some embodiments, the control board 310 can control the transformer 700 to transform the current input to or output from the grid connection distribution box 1.

[0115] The first step 30021 may protrude from one side of the first plate 30011 in the height direction and may support the first sub-input terminal 330 and the second sub-input terminal 350. In some embodiments, the first step 30021 may have a first sub-terminal mounting base 30031 and a second sub-terminal mounting base 30032.

[0116] The first sub-input terminal 330 can be disposed on the first sub-terminal mounting base 30031, and the second sub-input terminal 350 can be disposed on the second sub-terminal mounting base 30032.

[0117] The protruding block 30033 may be disposed between the first sub-terminal mounting base 30031 and the second sub-terminal mounting base 30032. The protruding block 30033 may be formed to protrude from the surface of the first step 30021.

[0118] The protruding block 30033 can define the first sub-terminal mounting base 30031 and the second sub-terminal mounting base 30032. The first sub-input terminal 330 and the second sub-input terminal 350 can be supported and fixed in place on the first step 30021 by the protruding block 30033. In some embodiments, the first sub-input terminal 330 and the second input terminal 350 can be separated by the protruding block 30033, thereby preventing interference between circuits.

[0119] The first post 30041 may be formed to protrude from the first plate 30011 in the height direction, and the second post 30042 may be formed to extend from the first step 30021. The uppermost ends of the first post 30041 and the second post 30042 may be formed to have the same height. The blocking module 500 may be mounted on the first post 30041 and the second post 30042.

[0120] According to an embodiment, power can be input to the control module 300 through the first sub-input tab 320, the first sub-input terminal 330, the second sub-input tab 340, and the second sub-input terminal 350.

[0121] The first sub-input terminal 330 can be connected to the first sub-power supply E1 to supply power. The first sub-input terminal 330 can be connected to the active line of the first sub-power supply E1. The first sub-input terminal 330 can be mounted on the first sub-input tab 320.

[0122] The first sub-input tab 320 may be disposed on the first sub-terminal mounting base 30031. The first sub-input tab 320 may have one end portion connected to the first sub-input terminal 330 and another end portion connected to the control board 310. In some embodiments, the first sub-input tab 320 may be connected to the relay module 200 via wires and may form a circuit for transmitting power to the relay module 200 under the control of the control board 310.

[0123] The second sub-input terminal 350 can be connected to the second sub-power supply E2 to supply power. The second sub-input terminal 350 can be connected to the active line of the second sub-power supply E2. The second sub-input terminal 350 can be mounted on the second sub-input tab 340.

[0124] The second sub-input tab 340 may be disposed on the second sub-terminal mounting base 30032. The second sub-input tab 340 may have one end portion connected to the second sub-input terminal 350 and another end portion connected to the control board 310. In some embodiments, the second sub-input tab 340 may be connected to the relay module 200 via a wire and may form a circuit for transmitting power to the relay module 200 under the control of the control board 310.

[0125] According to an embodiment, the first sub-input tab 320 and the second sub-input tab 340 can be bent upwards. The first sub-input tab 320 and the second sub-input tab 340 can be bent to correspond to the step difference between the first plate 30011 and the first step 30021. That is, the first sub-input tab 320 and the second sub-input tab 340 can be bent along the shape of the first step 30021, such that one end portion of them can be disposed on the first step 30021, and their other end portion can be disposed on the control substrate 310.

[0126] Figure 7 It is shown Figure 3 The view of the neutral module 400.

[0127] refer to Figure 1 and Figure 7The neutral module 400 may include a second base structure 4001 and a neutral input terminal 410, a neutral connection tab 420, a first neutral output terminal 430 and a second neutral output terminal 450 disposed on the second base structure 4001.

[0128] The neutral module 400 can be configured to be adjacent to the control module 300 and can have a neutral input terminal 410 connected to the main power supply GRID and one or more neutral output terminals 430 and 450 connected to one or more loads.

[0129] The second base structure 4001 may include insulating material. Therefore, the neutral input terminal 410, the first neutral output terminal 430, and the second neutral output terminal 450 mounted on the second base structure 4001 can form a circuit and prevent leakage current.

[0130] The second base structure 4001 may include heat-resistant and chemically resistant materials. Therefore, physical or chemical deformation of the second base structure 4001 due to heat generated from the neutral input terminal 410, the first neutral output terminal 430, and the second neutral output terminal 450 mounted on the second base structure 4001 can be prevented.

[0131] According to an embodiment, the second base structure 4001 may include a second plate 40011, a second step 40021, and a neutral terminal mounting base 40031.

[0132] The second plate 40011 may have a flat plate shape extending in the left-right direction and may be partially inserted into the cutout portion 30022 of the control module 300.

[0133] The second step 40021 may be formed by a portion of the surface of the second plate 40011 that protrudes in the height direction. The second step 40021 may support at least one current sensor. For example, a first current sensor CT1 and a second current sensor CT2 may be disposed on the second step 40021.

[0134] The first current sensor CT1 and the second current sensor CT2 can each be configured to be the same as the aforementioned current sensor CT mounted on the main input tab 120. However, it should be noted that, for the sake of distinction, the current sensor CT, the first current sensor CT1, and the second current sensor CT2 are referred to by different names.

[0135] The neutral terminal mounting base 40031 may have a flat plate shape extending from the second plate 40011, thereby forming a space in which the neutral connection tab 420 is mounted.

[0136] The neutral connection tab 420 can be configured as a plate-shaped terminal having an area corresponding to the neutral terminal mounting base 40031, and the neutral input terminal 410, the first neutral output terminal 430 and the second neutral output terminal 450 can be mounted on the neutral connection tab 420.

[0137] The neutral input terminal 410 can be connected to the neutral line of the main power supply GRID, allowing neutral line current to be input. The first neutral output terminal 430 can be connected to the active line of the first load (load 1), and the second neutral output terminal 450 can be connected to the active line of the second load (load 2), allowing neutral line current to be output to each load.

[0138] The neutral input terminal 410, the first neutral output terminal 430, and the second neutral output terminal 450 can be connected to each other via the neutral connection tab 420, thereby forming a circuit through which neutral line current flows in the neutral module 400. Therefore, the neutral current supplied from the main power supply GRID can be distributed to the first load (load 1) and the second load (load 2).

[0139] According to an embodiment, the edge of the neutral connection tab 420 may include a controller connection portion 420C, a transformer connection portion 420A, and a ground connection portion 420G.

[0140] The controller connection portion 420C can be connected to the control board 310 of the control module 300, and thus can control the input or output of the neutral current in the neutral module 400. The transformer connection portion 420A can be connected to the transformer 700, allowing the voltage of the neutral current to be transformed. The ground connection portion 420G can be connected to the ground module 800, thereby allowing the neutral current to flow to ground.

[0141] Figure 8 This is a cross-sectional view showing adjacent portions of the control module 300 and the neutral module 400.

[0142] In some embodiments, Figure 8 A cross-section of the mounting portion of the first current sensor CT1 and the first sub-input terminal 330 is shown, and the following description is equally applicable to the mounting portion of the second current sensor CT2 adjacent to the second sub-input terminal 350.

[0143] refer to Figure 1 and Figure 8 The control module 300 and the neutral module 400 can partially overlap each other and be positioned close to each other.

[0144] According to an embodiment, the width of the first step 30021 can be smaller than the width of the second base structure 4001. Therefore, a portion of the second plate 40011 can be inserted into the cutout portion 30022.

[0145] In some embodiments, when the second plate 40011 is inserted into the cutout portion 30022, the second step 40021 may be configured to face the first step 30021, and the neutral terminal mounting base 40031 may be partially disposed below the first step 30021.

[0146] According to an embodiment, the first current sensor CT1 and the first sub-input terminal 330 can be mounted on a straight line along the first axis AX. A wire connecting the first sub-power supply E1 to the first sub-input terminal 330 can pass through the first current sensor CT1 to connect to the first sub-input terminal 330. The power supplied from the first sub-power supply E1 can be measured by the first current sensor CT1.

[0147] When the current sensed by the first current sensor CT1 is normal, the power supplied from the first sub-power supply E1 can be input to the first sub-input terminal 330. When the first current sensor CT1 detects an abnormality such as overcurrent, it can also block the current flowing to the first sub-input terminal 330.

[0148] As described above, when power is normally input to the first sub-input terminal 330, the power can be transmitted through the terminal-side end portion 3201 of the first sub-input tab 320 to the control board 310 connected to the control board-side end portion 3202.

[0149] Figure 9 yes Figure 2 Exploded perspective view of signal processing module 600 and transformer 700. Figure 10 It is to assemble the signal processing module 600 and the transformer 700 in Figure 2 A view of the status of the power grid connection distribution box 1.

[0150] refer to Figures 1 to 10 The signal processing module 600 and the transformer 700 can be stacked vertically and assembled into a layered structure. The signal processing module 600 can be disposed on the transformer 700 to provide space for mounting the first signal processing substrate 610 and the second signal processing substrate 620.

[0151] The signal processing module 600 can perform power conversion or circuit compatibility based on the control signals from the control module 300. In some embodiments, the first signal processing substrate 610 can be connected to the control substrate 310 via wires to convert the power input to the power grid module 100 and the control module 300. The second signal processing substrate 620 can be connected to the control substrate 310 via wires and can enable signal compatibility between the circuits formed in the power grid module 100 and the control module 300.

[0152] According to an embodiment, the signal processing module 600 may include a plate having a flat plate shape, and a substrate mounting base 6002 and a shielding cover 6003 disposed on one side of the upper surface of the plate.

[0153] The substrate mounting base 6002 and the shielding cover 6003 can be connected to each other to accommodate the first signal processing substrate 610. The first signal processing substrate 610 can radiate a large amount of electromagnetic waves while converting power. Therefore, in order to prevent interference with adjacent electrical components and circuits, the first signal processing substrate 610 must be shielded by the substrate mounting base 6002 and the shielding cover 6003.

[0154] The substrate mounting base 6002 and the shielding cover 6003 can be connected to each other to form a shielding space that blocks electromagnetic radiation. The substrate mounting base 6002 and the shielding cover 6003 can include materials with electromagnetic shielding effects, or can be surface treated.

[0155] As an example, the substrate mount 6002 and the shield 6003 may comprise aluminum. Aluminum is a metallic material known to have self-electromagnetic shielding effects. However, one or more embodiments are not limited thereto, and the substrate mount 6002 and the shield 6003 may comprise different types of materials and may include aluminum material applied to or bonded to their surfaces.

[0156] The signal processing module 600 may have a substrate mounting portion 60012 disposed on the other side of the upper surface of the base plate 6001. The substrate mounting portion 60012 may be formed as a protrusion protruding upward from the base plate 6001, and multiple substrate mounting portions 60012 may be provided. A second signal processing substrate 620 may be mounted on the substrate mounting portion 60012, and therefore the second signal processing substrate 620 may be spaced at a certain height from the transformer 700 to prevent electrical interference.

[0157] The transformer 700 can be assembled through the housing 10. The transformer 700 may include a transformer frame 7001 inserted and fixed in the transformer hole 17, a transformer body 710 embedded in the central portion of the transformer frame 7001, and a transformer terminal area 720, with wires connected to the transformer body 710 connected to the transformer terminal area 720.

[0158] The transformer 700 can perform voltage conversion according to the control signal from the control module 300. In some embodiments, the transformer 700 can be connected to the control board 310 via wires to regulate the voltage of the power input to the power grid module 100 and the control module 300.

[0159] According to an embodiment, the signal processing module 600 and the transformer 700 can be arranged adjacent to the control module 300. The signal processing module 600 and the transformer 700 can overlap each other to form a layered structure. Therefore, the wires (through which the signal processing module 600 and the transformer 700 are connected to the control board 310) can be formed to be short and simple, thus improving the convenience and efficiency of wiring.

[0160] Figure 11 yes Figure 10 An enlarged view of part A shown.

[0161] refer to Figure 1 and Figure 11 At least a portion of the surface of the signal processing module 600 that is in contact with the transformer 700 may be open and may expose the transformer terminal area 720, which is used to connect wires from the control module 300 to the transformer 700.

[0162] According to an embodiment, the base plate 6001 may be configured to cover the upper surface of the transformer body 710 and may include a recessed portion 60011 exposing the transformer terminal region 720. The recessed portion 60011 may be configured to be a recessed shape formed by cutting a predetermined area from the edge of the base plate 6001. However, one or more embodiments are not limited thereto, and the base plate 6001 may have through holes to expose the transformer terminal region 720.

[0163] The transformer terminal area 720 can be configured as a connection terminal electrically connected to the transformer body 710. The transformer terminal area 720 may have multiple terminals for connection to wires connected to the control module 300.

[0164] As an example, the transformer terminal area 720 may include a first conductor terminal 721, a second conductor terminal 722, and a third conductor terminal 723. The first and second conductor terminals 721 and 722 can be connected to conductors connected to the control module 300 and can receive control signals related to the active line. The third conductor terminal 723 can be connected to a conductor connected to the control module 300 and can receive control signals related to the neutral line. Based on the control signals transmitted through the conductors connected to the transformer terminal area 720, the transformer 700 can regulate the voltage of the power input or output from the power grid connection distribution box 1.

[0165] According to an embodiment, the first signal processing substrate 610 can be mounted on an assembly post 60021 disposed inside the substrate mounting base 6002. The first signal processing substrate 610 can be embedded in the shielding space formed by the substrate mounting base 6002 and the shielding cover 6003.

[0166] The first signal processing substrate 610 can convert AC power to DC power, or convert a DC power source into DC power with a different voltage. As a specific example, the first signal processing substrate 610 can be provided as a prior art switched-mode power supply (SMPS) substrate. The first signal processing substrate 610 can rapidly pulse the input voltage using a high-frequency switching method, and then convert this pulse into the desired voltage using a transformer or other circuitry.

[0167] The shield 6003 may have at least one wire hole through which a wire connecting the control module 300 to the first signal processing substrate 610 passes. For electrical connection to the control module 300, a first control substrate side wire 611 and a second control substrate side wire 612 may be connected to the first signal processing substrate 610. Therefore, the shield 6003 may have a first wire hole 60031 and a second wire hole 60032, with the first control substrate side wire 611 passing through the first wire hole and the second control substrate side wire 612 passing through the second wire hole.

[0168] In some embodiments, the shield 6003 may have a third wire hole 60033 through which the connecting wire 615 connecting the first signal processing substrate 610 to the second signal processing substrate 620 passes.

[0169] The first wire hole 60031, the second wire hole 60032, and the third wire hole 60033 can each be configured with dimensions corresponding to the specifications of the wires passing through these wire holes. When the shielding cover 6003 is assembled to the substrate mounting base 6002, the corresponding wires can be inserted into the first wire hole 60031, the second wire hole 60032, and the third wire hole 60033, respectively, so that only very narrow gaps can be formed. Therefore, the shielding cover 6003 and the substrate mounting base 6002 can maintain shielding characteristics against internal electromagnetic waves.

[0170] According to an embodiment, the second signal processing substrate 620 can be mounted on the substrate mounting portion 60012 disposed on the base plate 6001.

[0171] The second signal processing substrate 620 enables electrical signals to be compatible between circuits formed within the power grid connection distribution box 1, or to be compatible with electrical signals of loads (load 1 or load 2) connected to the power grid connection distribution box 1. As a specific example, the second signal processing substrate 620 can be provided as a typical interface substrate.

[0172] Figure 12 It is shown Figure 2 A schematic diagram of the circuit of the power grid connection distribution box 1. (Reference) Figures 1 to 12 The power grid connection distribution box 1 can be connected to multiple power sources and can exchange power supplied to multiple loads.

[0173] In the power grid connection distribution box 1 of the embodiments of this disclosure, the circuit that supplies the main power from the main power source GRID to the first load (load 1) and the circuit that supplies the sub-power from the first sub-power source E1 or the second sub-power source E2 to the second load (load 2) can be configured to be separate from each other.

[0174] In this configuration, the power grid connection distribution box 1 may include multiple current sensors (not shown) to sense errors in the circuit. The control board 310 of the control module 300 can control the blocking module 500 based on the results sensed by the current sensors, thereby blocking the circuit portion where a problem has occurred.

[0175] According to an embodiment, the main power supplied from the main power grid can be input to the grid module 100 and the neutral module 400. In some embodiments, the active line of the main power grid can be connected to the main input terminal 110, and the common neutral line of the main power grid can be connected to the neutral input terminal 410.

[0176] As referenced above Figure 7 As described, the neutral module 400 may independently include circuitry for supplying power from the neutral line of the main power supply GRID to a load. For example, power supplied to the common neutral line of the main power supply GRID may be input to the neutral input terminal 410 and output to the first neutral output terminal 430, and may be supplied to a first load (load 1) or output to the second neutral output terminal 450 to supply a second load (load 2). Therefore, a description of the neutral line circuitry of the neutral module 400 will be omitted below.

[0177] The power grid connection distribution box 1 may include a power supply circuit through which the main power input to the main input terminal 110 is output to the first output terminal 130. Power can be supplied to the first load (load 1) through a circuit connected from the main input terminal 110 to the first output terminal 130.

[0178] According to an embodiment, sub-power supplied from the first sub-power source E1 and the second sub-power source E2 can be input to the control module 300. In some embodiments, the active line of the first sub-power source E1 can be connected to the first sub-input terminal 330, and the active line of the second sub-power source E2 can be connected to the second sub-input terminal 350.

[0179] The power grid connection distribution box 1 may include a power supply circuit through which sub-power input to the first sub-input terminal 330 is output to the second output terminal 150 via a relay module 200. Power can be supplied to the second load (load 2) via a circuit connected from the first sub-input terminal 330 to the second output terminal 150.

[0180] The power grid connection distribution box 1 may be equipped with a power supply circuit in which sub-power input to the second sub-input terminal 350 is output to the second output terminal 150 via a relay module 200. Power can be supplied to the second load (load 2) via a circuit connected from the second sub-input terminal 350 to the second output terminal 150.

[0181] Therefore, in the power grid connection distribution box 1, the relay module 200 can be electrically connected to at least one of the first sub-power source E1 and the second sub-power source E2 to supply power to the second load (load 2). Thus, the power grid connection distribution box 1 can stably supply power to the second load (load 2) and prevent power interruption.

[0182] According to another embodiment, the power grid connection distribution box 1 may further include a power supply circuit through which the main power input to the main input terminal 110 is output to the second output terminal 150 via the relay module 200. That is, the second load (load 2) can receive power input from the main power supply GRID, or it can receive power input from the first sub-power supply E1 and the second sub-power supply E2.

[0183] Therefore, when a power outage occurs due to an abnormality in the power supply of the main power source GRID, the grid connection distribution box 1 can stably supply power to the second load (load 2) through the first sub-power source E1 and the second sub-power source E2, and can prevent power outages.

[0184] While this disclosure has been described with reference to embodiments shown in the accompanying drawings, it is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments can be made therefrom. Therefore, the true scope of this disclosure should be determined solely by the appended claims.

[0185] The power grid connection distribution box according to embodiments of the present disclosure may include a structure in which communication processing and voltage conversion components are disposed on the upper part of the housing, thereby facilitating assembly and repair operations.

[0186] The power grid connection distribution box according to embodiments of this disclosure can be easily separated and partially replaced when problems occur in specific communication processing and voltage conversion components, thereby improving convenience.

[0187] In the power grid connection distribution box according to embodiments of the present disclosure, the components constituting the distribution board can be modularized according to their functions, thereby reducing manufacturing time and improving efficiency and cost competitiveness.

[0188] According to embodiments of the present disclosure, the power grid connection distribution box can be connected to multiple power grids. When one power grid experiences an anomaly, the power supply path can be switched to provide stable power to critical loads, thereby reducing the possibility of power outages and improving power supply reliability.

Claims

1. A power grid connection distribution box, comprising: A housing having an internal space; A power grid module is disposed in the internal space and has a main input terminal, into which main power is input. A control module is configured to be adjacent to the power grid module and has a control board and sub-input terminals, the control board being connected to the power grid module, and at least one sub-power input being connected to the sub-input terminals; A transformer, installed in the internal space and connected to the control board, is configured to convert voltage; and A signal processing module is disposed on the transformer to overlap with the transformer, connected to the control board, and configured to process electrical signals.

2. The grid connection distribution box of claim 1, wherein, The signal processing module includes: The base plate installed on the transformer; A substrate mounting base is disposed on the base plate, and a first signal processing substrate is mounted on the substrate mounting base; and A shielding cover that covers the upper portion of the substrate mounting base.

3. The grid connection distribution box of claim 2, wherein, The second signal processing substrate is mounted on the base plate, adjacent to the substrate mounting base and the shield.

4. The grid connection distribution box of claim 3, wherein, The shield has wire holes through which wires connecting the first signal processing substrate to the second signal processing substrate pass.

5. The grid connection distribution box of claim 2, wherein, The internal space provided by assembling the substrate mounting base and the shielding cover forms a shielding space, which is configured to block electromagnetic radiation from the first signal processing substrate.

6. The grid connection distribution box of claim 2, wherein, The shielding cover comprises aluminum.

7. The grid connection distribution box of claim 2, wherein, The shield has at least one wire hole through which the wires connecting the control board to the first signal processing board pass.

8. The grid connection distribution box of claim 1, wherein, The signal processing module is spaced at a predetermined height from the inner circumferential surface of the housing.

9. The grid connection distribution box of claim 1, wherein, The signal processing module has a notch in which a portion of the base plate mounted on the transformer is cut to expose multiple terminals of the transformer.

10. The power grid connection distribution box according to claim 1, wherein the power grid connection distribution box further comprises a neutral module, the neutral module being configured to be adjacent to the control module and facing the signal processing module.

11. The grid connection distribution box of claim 10, wherein, The neutral module and the signal processing module are located on opposite sides of the control module, and The power grid module is positioned along one side of the control module between the neutral module and the signal processing module.

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