Grid-connected distribution box

Abstract

A grid-connected distribution box is provided, comprising: a housing having an internal space; a first terminal block module disposed in the internal space and having a control board and a secondary input terminal, the control board being configured to control power distribution and the secondary input terminal being connected to at least one secondary power source; and a second terminal block module disposed to partially overlap the first terminal block module and having a neutral terminal connected to a neutral line.

Description

Technical Field

[0001] This disclosure relates to a grid-connected distribution box having a terminal block structure. Background Technology

[0002] Since distribution boxes are considered electrical devices used to divert and distribute power to multiple power consumers, they typically include a metal enclosure, a main circuit breaker connected to the power grid, multiple branch circuit breakers, and busbars that connect these components.

[0003] Recent distribution boxes have evolved beyond simple power distribution and are incorporating various intelligent functions depending on 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 existing distribution box are assembled in the order of the manufacturing process, and all terminals are arranged to be coplanar with each other. Therefore, during wiring operations, the working position is set deep and it is difficult to distinguish the terminals. This leads to the following disadvantages: a serious burden of human error, unusable space is created in the enclosure, thus reducing space utilization, and the size of the enclosure is increased. Summary of the Invention

[0005] The present disclosure aims to provide a distribution box that improves space utilization and ease of operation.

[0006] One aspect of this disclosure provides a grid-connected distribution box comprising: a housing having an internal space; a first terminal block module disposed in the internal space and having a control board and a secondary input terminal, the control board being configured to control power distribution and the secondary input terminal being connected to at least one secondary power source; and a second terminal block module disposed to partially overlap the first terminal block module and having a neutral terminal connected to a neutral line.

[0007] In some embodiments, a portion of the second terminal block module may be inserted into a cutout portion of the first terminal block module.

[0008] In some embodiments, the secondary input terminal and the neutral terminal may be located at different levels and may be arranged to at least partially overlap each other in the height direction.

[0009] In some embodiments, the first terminal block module may include: a first plate on which a control board is disposed; and a first step portion that protrudes from one side of the first plate in the height direction and has an upper surface on which at least one secondary input terminal is disposed.

[0010] In some embodiments, the grid-connected distribution box may further include a secondary input terminal block having one end portion disposed on the first plate and another end portion disposed on the first step portion to connect the control board to at least one secondary input terminal.

[0011] In some embodiments, at least one secondary input terminal block may be bent to correspond to the step difference between the first plate and the first step portion.

[0012] In some embodiments, a first auxiliary input terminal and a second auxiliary input terminal may be arranged on a first stepped portion, with power from the first auxiliary power supply being input to the first auxiliary input terminal and power from the second auxiliary power supply being input to the second auxiliary input terminal.

[0013] In some embodiments, the first step portion may include a protruding block extending between the first secondary input terminal and the second secondary input terminal.

[0014] In some embodiments, the second terminal block module may include: a second plate inserted into the lower space of the first step portion of the first terminal block module; and a second step portion protruding from the second plate in the height direction and arranged to face the first step portion, on which a current sensor is arranged.

[0015] In some embodiments, the grid-connected distribution box may further include a neutral terminal block on one side of the second plate, on which the neutral terminal is mounted.

[0016] In some embodiments, the width of the neutral terminal block may be smaller than the width of the second step portion.

[0017] In some embodiments, a portion of the neutral terminal block may be disposed below the first step portion of the first terminal block module, and another portion of the neutral terminal block may be disposed such that the input terminal of the neutral terminal is exposed.

[0018] In some embodiments, the current sensor may be arranged to face at least one secondary input terminal.

[0019] In some embodiments, the grid-connected distribution box may further include: a power grid module arranged in an internal space and having a main input terminal and at least one output terminal, with main power input to the main input terminal and at least one output terminal connected to at least one load; and a relay module arranged on one side of the power grid module.

[0020] In some embodiments, the power grid module may include: a main terminal block on which a main input terminal is mounted; a first output terminal block disposed below the main terminal block, wherein a first output terminal connected to a first load is mounted on the first output terminal block; and a second output terminal block disposed below the first output terminal block, wherein a second output terminal connected to a second load is mounted on the second output terminal block.

[0021] In some embodiments, the power grid module may further include: a first connector disposed on a first output terminal block such that one end portion of the first connector is connected to a first output terminal; and a second connector disposed on a second output terminal block such that one end portion of the second connector is connected to the second output terminal.

[0022] In some embodiments, the first connector and the second connector may have different lengths.

[0023] In some embodiments, at least one of the first output terminal block and the second output terminal block may have an opening into which the first connector or the second connector is inserted, and the opening extends through in the longitudinal direction.

[0024] In some embodiments, the power grid module may further include a relay housing on which the relay module is mounted, and the relay housing protrudes from the surface of the second output terminal block.

[0025] In some embodiments, the grid-connected distribution box may further include: a transformer arranged in the interior space of the housing; and a heat dissipation structure formed on the surface of the housing facing the transformer. Attached Figure Description

[0026] The above and other aspects, features and advantages of some embodiments of this 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 grid-connected distribution box with a terminal block structure according to an embodiment of the present disclosure; Figure 2 This is a perspective view showing an embodiment of a grid-connected distribution box; Figure 3 yes Figure 2 An exploded perspective view of a portion of a grid-connected 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 the relay module are assembled together along Figure 3A cross-sectional view taken by line V-V'; Figure 6 It is shown Figure 3 A view of the first terminal block module; Figure 7 It is shown Figure 3 A view of the second terminal block module; Figure 8 This is a view showing the state in which the first terminal block module and the second terminal block module are assembled together; Figure 9 It shows the view from above. Figure 8 A view of the first terminal block module and the second terminal block module; Figure 10 It shows based on Figure 8 A cross-sectional view taken from the mounting portion of the first current sensor and the first auxiliary input terminal of the first terminal block module of the second terminal block module; and Figure 11 It is shown Figure 2 A schematic diagram of the circuit of the grid-connected distribution box. Detailed Implementation

[0027] Because this disclosure is applicable to various variations and has various embodiments, specific embodiments will be shown in the accompanying drawings and described in detail in the specific implementation. The effects and features of this disclosure, as well as methods of implementing them, will become clear with reference 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.

[0028] In the following, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing the invention with reference to the drawings, the same or corresponding components will be given the same reference numerals and repeated descriptions will be omitted.

[0029] In the following embodiments, the terms "first," "second," and similar words are not intended to be limiting, but are used to distinguish one component from another.

[0030] In the following embodiments, unless the context clearly indicates otherwise, expressions such as “a,” “an,” and “the” used in the singular are also intended to include the plural forms.

[0031] In the following embodiments, it will be understood that terms such as “comprising,” “including,” and “having” indicate the presence of the described features or components, but do not exclude the presence or addition of one or more other features or components.

[0032] In the following embodiments, when a region, component, or like is located on or above another component, this disclosure includes not only the case where the region, component, or like is directly above the other component, but also the case where other regions, other components, or like may be located between them.

[0033] In the accompanying drawings, the dimensions of the components may be enlarged or reduced for ease of description. For example, the dimensions and thickness of each component shown in the drawings are schematic for ease of description, and therefore this disclosure is not limited to what is shown.

[0034] In the following embodiments, it will be understood that when a region, component, or like is referred to as being connected to another component, the region, component, or like may be directly connected to the other component, or there may be an intermediate component.

[0035] Figure 1 This is a schematic block diagram showing a grid-connected distribution box 1 with a terminal block structure according to an embodiment of the present disclosure. Figure 2 This is a perspective view showing an embodiment of the grid-connected distribution box 1.

[0036] Reference Figure 1 The grid-connected distribution box 1 can be electrically connected to the main power supply network (GRID), one or more auxiliary power sources E1 and E2, and multiple loads, namely load 1 and load 2, and can control the power flow. The grid-connected distribution box 1 can distribute the power input from the main power supply network or auxiliary power sources E1 and E2, and supply the input power to load 1 and load 2.

[0037] According to an embodiment, the main power supply network can be a power grid that includes infrastructure systems for generating, transmitting, and distributing electricity. For example, the main power supply network may include power plants, substations, power line networks, or the like.

[0038] The auxiliary power sources E1 and E2 can be configured as different types of power sources or systems from the main power supply network.

[0039] As an example, auxiliary power sources E1 and E2 can be configured as photovoltaic (PV) power generation systems. Each of auxiliary power sources 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 conditioning system (PCS) or a power conversion 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). The equipment can be an optimizer or a micro-inverter (MI).

[0040] Optionally, the auxiliary power supplies E1 and E2 may each include a coupler connected to the device. At least a portion of the device can be connected to the grid-connected distribution box 1 via the coupler. For example, the coupler can combine power output from multiple devices into a single output power. The combined power from the coupler can then be supplied to the grid-connected distribution box 1.

[0041] As another example, auxiliary power sources E1 and E2 can be configured as an energy storage system (ESS). Auxiliary power sources E1 and E2 can store electricity generated by photovoltaic modules or supplied from the grid, and can efficiently supply power to the grid-connected distribution box 1 according to the needs of load 1 and load 2. Auxiliary power sources E1 and E2 can each include a power conversion module and a battery for storing electricity. The power conversion module can be a PCS that performs the conversion between battery-side power and the opposite-side power. In this case, the PCS can include a bidirectional DC-to-DC converter connected to the battery to convert voltage, and a bidirectional inverter connecting the bidirectional DC-to-DC converter to equipment located outside the ESS.

[0042] Load 1 and Load 2 refer to devices installed at the electricity consumption end (e.g., residential, commercial facilities, or factories) and operating by receiving electrical energy distributed via grid-connected distribution box 1. That is, Load 1 and Load 2 can include various types of equipment, apparatus, facilities, and the like that operate by receiving electrical energy supplied from the main power supply network or secondary power sources E1 and E2.

[0043] According to embodiments of this disclosure, the grid-connected distribution box 1 can be connected to the power grid as the main power supply network, to the photovoltaic power generation system as the first auxiliary power source E1, and to the ESS as the second auxiliary power source E2. The grid-connected distribution box 1 can control the voltage, current, and / or power output from or supplied to each component according to the power supply status of the main power supply network and / or the auxiliary power sources E1 and E2.

[0044] Reference Figure 1 and Figure 2 In the grid-connected 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 arranged in the internal space of the housing 10.

[0045] The grid-connected distribution box 1 may include a power grid module 100, a relay module 200, a first terminal block module 300, a second terminal block module 400, a blocking module 500, a communication module 600, and a transformer 700 within the housing 10.

[0046] The power grid module 100 can be housed within the housing 10 and can be connected to the main power supply network, and can supply power to at least one load. The power grid module 100 can receive power from the main power supply network and can distribute power to at least one load. For example, the power grid module 100 can supply power to a first load (i.e., load 1) and / or a second load (i.e., load 2).

[0047] The relay module 200 can be disposed on one side of the power grid module 100 and can be assembled with the power grid module 100. The relay module 200 can be electrically connected to the first terminal block module 300. The relay module 200 can control the power supply to the power grid module 100 through the first terminal block module 300. The relay module 200 can connect to or disconnect from the power circuit according to the control signal from the first terminal block module 300.

[0048] The first terminal block module 300 can be connected to at least one auxiliary power source. For example, the first terminal block module 300 can be connected to at least one of a first auxiliary power source E1 and a second auxiliary power source E2 to receive power.

[0049] The auxiliary power supply can be configured as an emergency power source for generator equipment, power generation system inverter, or ESS. However, one or more embodiments are not limited to this, and any power source can serve as an auxiliary power source, as long as it can supply stable alternating current (AC) power to the first terminal block module 300.

[0050] The first terminal block module 300 can be connected to the relay module 200 and can perform control to transmit power supplied from the auxiliary power source to the power grid module 100 via the relay module 200. Through the first terminal block module 300, the power grid module 100 can transmit power supplied from the auxiliary power source to the load.

[0051] The second terminal block module 400 can be electrically connected to the first terminal block module 300 and can be arranged adjacent to the power grid module 100. The second terminal block module 400 can be connected to the neutral line of the main power supply network and the neutral line of the load, thereby securing these neutral lines.

[0052] In this embodiment, the grid module 100 can be connected to the live wire of the main power supply network to allow power input. The grid module 100 can also be connected to the live wires of load 1 and load 2 to allow power output. In this case, the second terminal block module 400 can be connected to the common neutral wire of the main power supply network to allow power input. The second terminal block module 400 can also be connected to load 1 and load 2 to allow power output. The grid-connected distribution box 1 can receive and distribute power at a constant voltage by utilizing the phase voltage generated between the live wire and the neutral wire.

[0053] The blocking module 500 may include a typical circuit breaker to block power transmission in the grid-connected distribution box 1. The blocking module 500 may be electrically connected to the first terminal block module 300 and, in the event of an abnormality in power supply, the blocking module 500 stops the power supply.

[0054] According to an embodiment, the blocking module 500 can be arranged on the first terminal block module 300 to overlap with the first terminal block module 300. For example... Figure 2 As shown, the blocking module 500 can be arranged and stacked on the first terminal block module 300, so that the grid-connected distribution box 1 can have a simple internal structure and a compact size.

[0055] The communication module 600 can be electrically connected to the first terminal block module 300 and can perform communication processing according to control signals. The communication module 600 may include a switched-mode power supply (SMPS) board 610 for converting AC current to DC current and an interface board 620 for processing signals between loops.

[0056] The transformer 700 can be arranged inside the housing 10. As an example, the transformer 700 can be configured as a typical autotransformer. The transformer 700 can be connected to the first terminal block module 300 and can supply phased power from the grid module 100 to the first load (i.e., load 1) and the second load (i.e., load 2) according to control signals.

[0057] 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 externally when the transformer 700 and other internal components are in operation. According to an embodiment, the communication module 600 can be disposed on the transformer 700 to overlap with it. Figure 2 As shown, the communication module 600 can be set and stacked on the transformer 700, so that the grid-connected distribution box 1 can have a simple internal structure and a compact size.

[0058] Optionally, the grid-connected distribution box 1 may also include a grounding module 800. The grounding module 800 can connect the electrical circuit to the ground via a conductor, allowing current to flow to the ground. The grounding module 800 allows current to flow to the ground in the event of abnormal voltage, thereby enabling the equipment to maintain the same potential.

[0059] Figure 3 yes Figure 2 An exploded perspective view of a portion of the grid-connected distribution box 1.

[0060] Reference Figure 3 The power grid module 100, relay module 200, first terminal block module 300 and second terminal block module 400 can be arranged adjacent to each other.

[0061] For ease of description, in the following text, the side in the grid-connected distribution box 1 where the second terminal block module 400 is arranged is defined as the front side, and the side where the transformer 700 is arranged is defined as the rear side.

[0062] The power grid module 100 may have a first base body 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 body 1001.

[0063] The first base body 1001 may have a step difference. In some embodiments, the first base body 1001 may be formed in a shape that extends in the length direction of the housing 10 and may be arranged on the left side of the interior space of the housing 10.

[0064] The first terminal block module 300 can be generally flat and can be arranged on the right side of the interior space of the housing 10. The first terminal block module 300 can be arranged parallel to the power grid module 100 in the left-right direction.

[0065] The first terminal block module 300 may have a first base structure 3001, such that a first stepped portion 30021 on which at least one secondary input terminal is mounted may be formed on the front side of the first base structure, and a power grid module support portion 30012 adjacent to the power grid module 100 may be formed on one side of the first base structure.

[0066] The first stepped portion 30021 may be formed to protrude upward from the base surface of the first base structure 3001. A cutout portion 30022 may be disposed below the first stepped portion 30021. The cutout portion 30022 may form a space recessed from the front surface of the first base structure 3001. The second base structure 4001 of the second terminal block module 400 may be partially inserted into the cutout portion 30022.

[0067] The first stepped portion 30021 can protrude from the bottom surface inside the housing 10, and therefore the auxiliary input terminal mounted on the first stepped portion 30021 can be arranged on the upper part of the housing 10. In some embodiments, when performing the operation of connecting the wire to the auxiliary input terminal, the operation position can be set on the upper side of the housing 10, thereby improving the convenience of operation.

[0068] The power grid module support 30012 can be configured as a block shape 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 body 1001.

[0069] According to an embodiment, the opposing surfaces of the first base body 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 body 1001. Therefore, the power grid module 100 and the first terminal block module 300 can at least partially overlap each other for a more compact installation.

[0070] The second terminal block module 400 can be formed to extend in the width direction of the housing 10 and can be arranged on the front side of the interior space of the housing 10. The second terminal block module 400 can be arranged to be adjacent to the first terminal block module 300 in the front-rear direction.

[0071] The second terminal block module 400 may have a second base structure 4001, and the second step portion 40021 may be arranged on one side of the second plate 40011 having a flat plate shape, and the neutral terminal block 40031 may be arranged on the other side of the second plate 40011.

[0072] The second step portion 40021 may be arranged on one side of the front surface of the second base structure 4001. The second step portion 40021 may be formed to protrude upward from the second flat plate 40011 of the second base structure 4001.

[0073] The neutral terminal block 40031 can be arranged on the other side of the second base structure 4001. The neutral terminal block 40031 can be arranged on the second plate 40011 of the second base structure 4001.

[0074] In the second base structure 4001, a portion of the rear side of the second step portion 40021 can be inserted into the cut portion 30022 of the first base structure 3001.

[0075] According to an embodiment, the opposing surfaces of the first base structure 3001 and the second base structure 4001 can correspond to each other. The base portion of the second base structure 4001 can be partially inserted into the cutout portion 30022 of the first base body 1001. Therefore, the first terminal block module 300 and the second terminal block module 400 can at least partially overlap each other for a more compact installation.

[0076] Figure 4 It is shown Figure 3 A view of the power grid module 100 and the relay module 200. Figure 5 It is when the power grid module 100 and the relay module 200 are assembled together along Figure 3 A cross-sectional view taken by line V-V'.

[0077] Reference Figures 1 to 5 The power grid module 100 and the relay module 200 can be assembled together to form an electrical circuit.

[0078] The power grid module 100 may include a first base body 1001 having a step difference, and one or more output terminals 130, 150 and main input terminals 110 arranged at different levels along the step difference.

[0079] The power grid module 100 may include a main input terminal 110, a main input connector 120, a first output terminal 130, a first connector 140, a second output terminal 150, and a second connector 160.

[0080] According to an embodiment, the first base body 1001 may include a main terminal block 10011 forming its upper surface, a first output terminal block 10021 disposed below the main terminal block 10011, and a second output terminal block 10022 disposed below the first output terminal block 10021.

[0081] The main input terminal 110 can be mounted on the main terminal block 10011, the first output terminal 130 can be mounted on the first output terminal block 10021, and the second output terminal 150 can be mounted on the second output terminal block 10022. That is, due to the structure of the first base body 1001, the main input terminal 110, the first output terminal 130, and the second output terminal 150 can be arranged at different levels.

[0082] In another embodiment, the main input terminal 110 may be arranged on either the first output terminal block 10021 or the second output terminal block 10022, and the first output terminal 130 and the second output terminal 150 may be arranged on the remaining output terminal blocks and the main terminal block 10011.

[0083] The first base body 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 base body 1001 can form an electrical circuit and prevent leakage current.

[0084] The first base body 1001 may include a heat-resistant and chemically resistant material. Therefore, physical or chemical deformation of the first base body 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 base body 1001 can be prevented.

[0085] The power grid module 100 can form an electrical circuit connected to the relay module 200 through the main input terminal 110, main input terminal 120, first output terminal 130, first connector 140, second output terminal 150 and second connector 160 installed on the first base body 1001.

[0086] The main input terminal 110 can be directly connected to the main power supply network, allowing power to be applied. The main input terminal 110 can be connected to the live wire of the main power supply network. The main input terminal 110 can be connected to the relay module 200 via the main input connector 120.

[0087] The main input connector 120 can be arranged on the main terminal block 10011. The main input terminal 110 can be mounted on the main input connector 120. The main input connector 120 can have one end portion connected to the main input terminal 110 and another end portion connected to the first relay connector 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 connector 120.

[0088] As a specific example, the main input terminal 110 may have a flat plate-shaped tab fixing member 1201, such that the tab fixing member 1201 can be arranged on the main terminal block 10011. The main input terminal 110 may be located on the tab fixing member 1201. In this case, the other end portion of the main input tab 120 may be shaped to extend from the tab fixing member 1201 toward the first relay tab 220.

[0089] The main input terminal block 120 may also include a current sensor CT. The current input to the main input terminal 110 can be measured by the current sensor CT at the main input terminal block 120.

[0090] The first output terminal 130 can be connected to the first load (i.e., load 1) to supply power. The first output terminal 130 can be connected to the live wire of the first load (i.e., load 1). The first output terminal 130 can be connected to the relay module 200 via the first connector 140.

[0091] The first connector 140 may be disposed on the first output terminal block 10021. The first opening S1 may be formed to pass through the first output terminal block 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.

[0092] The first connector 140 may have one end portion connected to a first relay contact 220 of the relay module 200 and another end portion connected to a first output terminal 130. The first connector 140 may form a loop connecting the main input terminal 110 to the first output terminal 130 via the first relay contact 220. Accordingly, power supplied from the main power supply network can be distributed to the first load (i.e., load 1).

[0093] In some embodiments, another end portion of the first connector 140 may be bent upwards. The first connector 140 may have a bent end portion 1401 and a straight end portion 1402, the bent end portion being bent upwards and the straight end portion 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 terminal block 220 above the bottom surface of the first output terminal block 10021 and can have a large spacing distance from the second connector 160.

[0094] The second output terminal 150 can be connected to a second load (i.e., load 2) to supply power. The second output terminal 150 can be connected to the live wire of the second load (i.e., load 2). The second output terminal 150 can be connected to the relay module 200 via the second connector 160.

[0095] The second connector 160 may be disposed on the second output terminal block 10022. The second opening S2 may be formed to pass through the second output terminal block 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.

[0096] The second connector 160 may have one end portion connected to the second relay terminal 260 of the relay module 200 and another end portion connected to the second output terminal 150. The second connector 160 may form a loop connecting the relay module 200 and the second output terminal 150, thereby enabling the power transmitted through the relay module 200 to be distributed to the second load (i.e., load 2).

[0097] 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 block 10022 and may be mounted stably.

[0098] 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 body 1001, the length of the second output terminal block 10022 may be greater than the length of the first output terminal block 10021.

[0099] Accordingly, within the housing 10, the first output terminal 130 may be arranged 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 may be located behind the bent end portion 1401 of the first connector 140.

[0100] Due to the shape of the first base body 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 be easily performed during the assembly process of the power grid module 100.

[0101] In some embodiments, during the assembly process of the power grid module 100 and the relay module 200, the operations of connecting the second relay terminal 260 to the relay-side end portion 1601 of the second connector 160 and connecting the first relay terminal 220 to the bent end portion 1401 of the first connector 140 can be easily performed.

[0102] The first base body 1001 of the power grid module 100 may also include a relay holder 10012 protruding from the surface of the second output terminal block 10022. The relay holder 10012 may support the relay module 200.

[0103] When the relay module 200 is assembled with the power grid module 100, the relay module 200 can be arranged on the relay socket 10012 so that the assembly part assembled with the power grid module 100 can be stably supported.

[0104] 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 first terminal block module 300. The relay module 200 can receive power from either the first auxiliary power supply E1 or the second auxiliary power supply E2 connected to the first terminal block module 300.

[0105] 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 first terminal block module 300 to the second output terminal 150. That is, 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 auxiliary power supply to the load.

[0106] The relay module 200 may include a first relay 210, a first relay terminal block 220, a spacer 230, a connecting terminal block 240, a second relay 250, and a second relay terminal block 260.

[0107] 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 terminal 220 to form an electrical circuit, and the second relay 250 may be connected to a second relay terminal 260 to form an electrical circuit.

[0108] According to an embodiment, the first relay 210 can assemble the first relay terminal block 220 onto the first relay terminal block support 211. The first relay terminal block 220 can connect the main input terminal block 120 of the power grid module 100 and the first connector 140 to each other to form a power supply circuit of the main power supply network.

[0109] In this configuration, the second relay 250 can be assembled with the second relay terminal 260 onto the second relay terminal support 251. The second relay terminal 260 can be connected to the second connector 160 of the power grid module 100 to form a power supply loop for transmitting power from the first terminal block module 300 to the relay module 200 for either the first auxiliary power source E1 or the second auxiliary power source E2.

[0110] The connecting piece 240 may have a shape that extends vertically to connect the first relay 210 to the second relay 250. In this case, the spacer 230 may be arranged between the first relay 210 and the second relay 250 to support the first relay 210 and the second relay 250 and maintain the space between them.

[0111] Figure 6 It is shown Figure 3 A view of the first terminal block module 300.

[0112] Reference Figure 1 and Figure 6 The first terminal block module 300 may include a first base structure 3001, and a control board 310, a first secondary input connector 320, a first secondary input terminal 330, a second secondary input connector 340 and a second secondary input terminal 350 arranged on the first base structure 3001.

[0113] The first base structure 3001 may include insulating material. Therefore, the control board 310, the first secondary input terminal 330, and the second secondary input terminal 350 mounted on the first base structure 3001 can form an electrical circuit and prevent leakage current.

[0114] 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 secondary input terminal 330, and the second secondary input terminal 350 mounted on the first base structure 3001 can be prevented.

[0115] According to an embodiment, the first base structure 3001 may include a first flat plate 30011, a power grid module support portion 30012, and a first step portion 30021. The first base structure 3001 may have a step difference, such that the control board 310, the first secondary input terminal 330, and the second secondary input terminal 350 can be arranged at different levels and arranged so as not to overlap each other.

[0116] Already referred to Figure 3 The cutout portion 30022 of the first step portion 30021 and the power grid module support portion 30012 have been described, so their descriptions will be omitted below.

[0117] The first plate 30011 may have a flat plate shape, and the control plate 310 may be arranged on the first plate 30011.

[0118] The control board 310 can be configured as a circuit board that generates electrical signals for controlling the grid-connected distribution box 1. The control board 310 can generate control signals for the grid module 100, relay module 200, first terminal block module 300, second terminal block module 400, blocking module 500, communication module 600 and transformer 700.

[0119] For example, control board 310 can measure the secondary input power at the first secondary input terminal 330 and the second secondary input terminal 350. In some embodiments, control board 310 can control relay module 200 to switch power supply circuits, thereby controlling the power transmitted to the load. In some embodiments, when an abnormality occurs in the current input to or output from the grid module 100 and the second terminal block module 400, control board 310 can control blocking module 500 to block the current. In some embodiments, control board 310 can control transformer 700 to transform the current input to or output from the grid-connected distribution box 1.

[0120] The first step portion 30021 may protrude from one side of the first plate 30011 in the height direction and may support the first secondary input terminal 330 and the second secondary input terminal 350. In some embodiments, the first step portion 30021 may have a first secondary terminal block 30031 and a second secondary terminal block 30032.

[0121] The first input terminal 330 can be arranged on the first terminal block 30031, and the second input terminal 350 can be arranged on the second terminal block 30032.

[0122] The protrusion 30033 can be arranged between the first secondary terminal block 30031 and the second secondary terminal block 30032. The protrusion 30033 can be formed to protrude from the surface of the first stepped portion 30021.

[0123] The protruding block 30033 can define the first auxiliary terminal block 30031 and the second auxiliary terminal block 30032. The first auxiliary input terminal 330 and the second auxiliary input terminal 350 can be supported and fixed in place on the first stepped portion 30021 by the protruding block 30033. In some embodiments, the first auxiliary input terminal 330 and the second auxiliary input terminal 350 can be separated by the protruding block 30033, so as to prevent interference between circuits.

[0124] According to an embodiment, power can be input to the first terminal block module 300 through the first input connector 320, the first input terminal 330, the second input connector 340, and the second input terminal 350.

[0125] The first input terminal 330 can be connected to the first auxiliary power supply E1, allowing power to be applied. The first input terminal 330 can be connected to the live wire of the first auxiliary power supply E1. The first input terminal 330 can be mounted on the first input connector 320.

[0126] The first input terminal block 320 may be disposed on the first terminal block 30031. The first input terminal block 320 may have one end portion connected to the first input terminal 330 and another end portion connected to the control board 310. In some embodiments, the first input terminal block 320 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.

[0127] The second input terminal 350 can be connected to the second auxiliary power supply E2, allowing power to be applied. The second input terminal 350 can be connected to the live wire of the second auxiliary power supply E2. The second input terminal 350 can be mounted on the second input connector 340.

[0128] The second input terminal block 340 may be disposed on the second terminal block 30032. The second input terminal block 340 may have one end portion connected to the second input terminal 350 and another end portion connected to the control board 310. In some embodiments, the second input terminal block 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.

[0129] According to an embodiment, the first input terminal block 320 and the second input terminal block 340 can be bent upwards. The first input terminal block 320 and the second input terminal block 340 can be bent to correspond to the step difference between the first flat plate 30011 and the first stepped portion 30021. That is, the first input terminal block 320 and the second input terminal block 340 can be bent along the shape of the first stepped portion 30021, such that one end portion of the first input terminal block 320 and the second input terminal block 340 can be disposed on the first stepped portion 30021, and the other end portion of the first input terminal block 320 and the second input terminal block 340 can be disposed on the control plate 310.

[0130] Figure 7 It is shown Figure 3 A view of the second terminal block module 400.

[0131] Reference Figure 1 and Figure 7The second terminal block module 400 may include a second base structure 4001 and a neutral input terminal 410, a neutral connection piece 420, a first neutral output terminal 430 and a second neutral output terminal 450 arranged on the second base structure 4001.

[0132] The second terminal block module 400 may be arranged adjacent to the first terminal block module 300 and may have a neutral input terminal 410 connected to the main power supply network and one or more neutral output terminals 430, 450 connected to one or more loads.

[0133] 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 an electrical circuit and prevent leakage current.

[0134] 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.

[0135] According to an embodiment, the second base structure 4001 may include a second flat plate 40011, a second stepped portion 40021, and a neutral terminal block 40031.

[0136] 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 first terminal block module 300.

[0137] The second step portion 40021 and the neutral terminal block 40031 can be arranged laterally parallel on the second plate 40011. In this case, the width of the neutral terminal block 40031 can be smaller than the width of the second step portion 40021.

[0138] The second step portion 40021 may be formed from a portion of the surface of the second flat plate 40011 that protrudes in the height direction. The second step portion 40021 may support at least one current sensor. For example, a first current sensor CT1 and a second current sensor CT2 may be arranged on the second step portion 40021.

[0139] The first current sensor CT1 and the second current sensor CT2 can each be configured to be the same sensors as the current sensor CT described above, which is mounted on the main input terminal block 120. However, for the sake of distinction, the current sensor CT, the first current sensor CT1, and the second current sensor CT2 are described using different names.

[0140] The neutral terminal block 40031 may have a flat plate shape extending from the second plate 40011, thereby forming a space in which the neutral connection piece 420 is installed.

[0141] The neutral connection piece 420 can be configured as a flat plate terminal with an area corresponding to the neutral terminal block 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 piece 420.

[0142] The neutral input terminal 410 can be connected to the neutral line of the main power supply network, allowing neutral line current to be input. The first neutral output terminal 430 can be connected to the live wire of the first load (i.e., load 1), and the second neutral output terminal 450 can be connected to the live wire of the second load (i.e., load 2), allowing neutral line current to be output to each load.

[0143] 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 piece 420, thereby forming a loop through which the neutral line current flows in the second terminal block module 400. Accordingly, the neutral current supplied from the main power supply network can be distributed to the first load (i.e., load 1) and the second load (i.e., load 2).

[0144] According to an embodiment, the edge of the neutral connection piece 420 may include a controller connection portion 420C, a transformer connection portion 420A, and a ground connection portion 420G.

[0145] The controller connection portion 420C can be connected to the control board 310 of the first terminal block module 300, thus allowing control of the input or output of the neutral current in the second terminal block module 400. The transformer connection portion 420A can be connected to the transformer 700, enabling voltage transformation of the neutral current. The ground connection portion 420G can be connected to the grounding module 800, allowing the neutral current to flow to the ground.

[0146] Figure 8 This is a view showing the first terminal block module 300 and the second terminal block module 400 assembled together. Figure 9 It shows the view from above. Figure 8 A view of the first terminal block module 300 and the second terminal block module 400. Figure 10 It shows based on Figure 8 A cross-sectional view of the mounting portion of the first current sensor CT1 of the second terminal block module 400 and the first auxiliary input terminal 330 of the first terminal block module 300.

[0147] The following description can also be applied to the mounting portion of the second current sensor CT2 adjacent to the second auxiliary input terminal 350.

[0148] Reference Figure 1 and Figures 8 to 10 The first base structure 3001 of the first terminal block module 300 and the second base structure 4001 of the second terminal block module 400 can partially overlap each other to be arranged close to each other.

[0149] According to an embodiment, the width of the first step portion 30021 may be smaller than the width of the second base structure 4001. Accordingly, a portion of the second plate 40011 may be inserted into the cut-out portion 30022.

[0150] When the second plate 40011 is inserted into the cut portion 30022, the second step portion 40021 can be arranged to face the first step portion 30021, and the neutral terminal block 40031 can be partially arranged below the first step portion 30021.

[0151] In some embodiments, the neutral terminal block 40031 may be arranged such that a portion of it is disposed below the first stepped portion 30021, and another portion of it is exposed. The portion of the neutral terminal block 40031 on which the first neutral output terminal 430 and the second neutral output terminal 450 are mounted may be disposed below the first stepped portion 30021 to overlap with it. The upper portion of the neutral input terminal 410 on which the neutral terminal block 40031 is mounted may be exposed without overlapping the first stepped portion 30021.

[0152] The neutral input terminal 410, the first neutral output terminal 430 and the second neutral output terminal 450 arranged on the neutral terminal block 40031 can be arranged in a stacked structure at a different level than the first secondary input terminal 330 and the second secondary input terminal 350 arranged on the first step portion 30021.

[0153] Accordingly, in the grid-connected distribution box 1 according to the embodiments of the present disclosure, the first terminal block module 300 and the second terminal block module 400 can be arranged to partially overlap each other, thereby improving the space utilization within the housing 10, increasing the freedom of internal design, and further reducing the overall size of the distribution box.

[0154] In some embodiments, the first secondary input terminal 330 and the second secondary input terminal 340 mounted on the first terminal block module 300, and the neutral input terminal 410, the first neutral output terminal 430 and the second neutral output terminal 450 mounted on the second terminal block module 400 are arranged in different positions, so that the user can easily distinguish the various terminals.

[0155] For example, the first current sensor CT1 arranged on the second step portion 40021 can be arranged to face the first auxiliary input terminal 330 arranged on the first step portion 30021, and the second current sensor CT2 can be arranged to face the second auxiliary input terminal 350.

[0156] like Figure 10 As shown, the first current sensor CT1 and the first secondary input terminal 330 can be mounted on a straight line along the first axis AX. A wire connecting the first secondary power supply E1 to the first secondary input terminal 330 can pass through the first current sensor CT1 to connect to the first secondary input terminal 330. The power supplied from the first secondary power supply E1 can be measured by the first current sensor CT1. When the current sensed by the first current sensor CT1 is normal, the power supplied from the first secondary power supply E1 can be input to the first secondary input terminal 330. When the first current sensor CT1 detects an abnormality (e.g., overload current), the current flowing to the first secondary input terminal 330 can be blocked.

[0157] As described above, when power is normally input to the first secondary input terminal 330, power can be transmitted through the terminal side end portion 3201 of the first secondary input connector 320 to the control board 310 connected to the control board side end portion 3202.

[0158] Figure 11 It is shown Figure 2 A schematic diagram of the circuit of the grid-connected distribution box 1. (Refer to...) Figures 1 to 11 The grid-connected distribution box 1 can be connected to multiple power sources and can exchange power supplied to multiple loads.

[0159] In the grid-connected distribution box 1 according to an embodiment of the present disclosure, the circuit for supplying main power applied from the main power supply network to the first load (i.e., load 1) and the circuit for supplying auxiliary power applied from the first auxiliary power source E1 or the second auxiliary power source E2 to the second load (i.e., load 2) can be arranged separately from each other.

[0160] In this configuration, the grid-connected distribution box 1 may include multiple current sensors (not shown) to detect errors in the circuit. The control board 310 of the first terminal block module 300 can control the blocking module 500 based on the results sensed by the current sensors, thereby blocking the circuit segment where the problem has occurred.

[0161] According to an embodiment, main power supplied from the main power supply network can be input to the grid module 100 and the second terminal block module 400. In some embodiments, the live wire of the main power supply network can be connected to the main input terminal 110, and the common neutral wire of the main power supply network can be connected to the neutral input terminal 410.

[0162] As referenced above Figure 7 As described, the second terminal block module 400 may independently include a loop for supplying power applied to a load via the neutral line of the main power supply network. For example, power applied to the common neutral line of the main power supply network may be input to the neutral input terminal 410 and output to the first neutral output terminal 430 and supplied to a first load (i.e., load 1), or output to the second neutral output terminal 450 to supply to a second load (i.e., load 2). Therefore, a description of the neutral line loop of the second terminal block module 400 is omitted below.

[0163] The grid-connected distribution box 1 may include a power supply circuit through which 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 (i.e., load 1) through a circuit connecting the main input terminal 110 to the first output terminal 130.

[0164] According to an embodiment, auxiliary power supplied from the first auxiliary power source E1 and the second auxiliary power source E2 can be input to the first terminal block module 300. In some embodiments, the live wire of the first auxiliary power source E1 can be connected to the first auxiliary input terminal 330, and the live wire of the second auxiliary power source E2 can be connected to the second auxiliary input terminal 350.

[0165] The grid-connected distribution box 1 may include a power supply circuit through which auxiliary power input to the first auxiliary input terminal 330 is output to the second output terminal 150 via a relay module 200. Power can be supplied to the second load 2 through a circuit connecting the first auxiliary input terminal 330 to the second output terminal 150.

[0166] The grid-connected distribution box 1 may be equipped with a power supply circuit in which the auxiliary power input to the second auxiliary input terminal 350 is output to the second output terminal 150 via the relay module 200. Power can be supplied to the second load (i.e., load 2) through the circuit connecting the second auxiliary input terminal 350 to the second output terminal 150.

[0167] Accordingly, in the grid-connected distribution box 1, the relay module 200 can be electrically connected to at least one of the first auxiliary power supply E1 and the second auxiliary power supply E2 to supply power to the second load (i.e., load 2). Accordingly, the grid-connected distribution box 1 can stably supply power to the second load (i.e., load 2) and prevent power interruption.

[0168] According to another embodiment, the grid-connected 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 (i.e., load 2) can receive power input from the main power supply network, or it can receive power input from the first auxiliary power source E1 and the second auxiliary power source E2.

[0169] Correspondingly, when the main power supply network that provides continuous power is interrupted due to an anomaly, the grid-connected distribution box 1 can stably supply power to the second load (i.e., load 2) through the first auxiliary power source E1 and the second auxiliary power source E2, and can prevent power interruption.

[0170] 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 are possible. Therefore, the true scope of this disclosure should be determined solely by the appended claims.

[0171] A grid-connected distribution box according to an embodiment of the present disclosure may include a structure in which terminals are arranged on the upper part of the enclosure to facilitate the connection of wires.

[0172] In the grid-connected distribution box according to embodiments of the present disclosure, when a problem occurs at a specific terminal, the corresponding module can be separated and partially replaced, thereby improving economic feasibility.

[0173] In a grid-connected distribution box according to an embodiment of the present disclosure, the components constituting the distribution panel can be modularized according to their function, thereby reducing manufacturing time and improving efficiency and cost competitiveness.

[0174] According to embodiments of this disclosure, the grid-connected distribution box can be connected to multiple power grids, and when one power grid experiences an anomaly, the power supply path can be switched to supply stable power to critical loads, thereby reducing the likelihood of power outages and improving supply reliability.

Claims

1. A grid-connected distribution box, the grid-connected distribution box comprising: A housing having an internal space; A first terminal block module is arranged in the internal space and has a control board and a secondary input terminal, the control board being configured to control power distribution and the secondary input terminal being connected to at least one secondary power source. as well as The second terminal block module is arranged to partially overlap with the first terminal block module and has a neutral terminal connected to the neutral line.

2. The grid-tie distribution box of claim 1, wherein, A portion of the second terminal block module is inserted into the cutout portion of the first terminal block module.

3. The grid-tie distribution box of claim 1, wherein, The secondary input terminal and the neutral terminal are located at different levels and are arranged to at least partially overlap each other in the height direction.

4. The grid-tie distribution box of claim 1, wherein, The first terminal block module includes: A first flat plate, on which the control board is disposed; and A first step portion protrudes from one side of the first plate in the height direction, and the first step portion has an upper surface on which at least one secondary input terminal is arranged.

5. The grid-connected distribution box according to claim 4, further comprising a secondary input terminal block having one end portion disposed on the first flat plate and another end portion disposed on the first stepped portion for connecting the control board to the at least one secondary input terminal.

6. The grid-tie distribution box of claim 5, wherein, The at least one secondary input terminal is bent to correspond to the step difference between the first plate and the first step portion.

7. The grid-tie distribution box of claim 4, wherein, The first and second input terminals are arranged on the first stepped portion. Power from the first power supply is input to the first input terminal, and power from the second power supply is input to the second input terminal.

8. The grid-tie distribution box of claim 7, wherein, The first stepped portion includes a protruding block that protrudes between the first secondary input terminal and the second secondary input terminal.

9. The grid-tie distribution box of claim 1, wherein, The second terminal block module includes: The second plate is inserted into the lower space of the first step portion of the first terminal block module; and A second step portion, which protrudes from the second plate in the height direction and is arranged to face the first step portion, is on which a current sensor is arranged.

10. The grid-connected distribution box according to claim 9, wherein the grid-connected distribution box further includes a neutral terminal block on one side of the second plate, the neutral terminal being mounted on the neutral terminal block.

11. The grid-tie distribution box of claim 10, wherein, The width of the neutral terminal block is smaller than the width of the second step portion.

12. The grid-tie distribution box of claim 10, wherein, A portion of the neutral terminal block is positioned below the first step of the first terminal block module, and Another portion of the neutral terminal block is arranged such that the input terminal of the neutral terminal is exposed.

13. The grid-tie distribution box of claim 9, wherein, The current sensor is arranged to face the secondary input terminal.

14. The grid-connected distribution box according to claim 1, further comprising: A power grid module is arranged in the internal space and has a main input terminal and at least one output terminal, with main power input to the main input terminal and at least one output terminal connected to at least one load; as well as A relay module is arranged on one side of the power grid module.

15. The grid-tie distribution box of claim 14, wherein, The power grid module includes: Main terminal block, on which the main input terminal is mounted; A first output terminal block is disposed below the main terminal block, and a first output terminal connected to a first load is mounted on the first output terminal block; and A second output terminal block is arranged below the first output terminal block, and a second output terminal connected to the second load is mounted on the second output terminal block.

16. The grid-tie distribution box of claim 15, wherein, The power grid module also includes: A first connector, disposed on the first output terminal block such that one end portion of the first connector is connected to the first output terminal; and A second connector is disposed on the second output terminal block such that one end portion of the second connector is connected to the second output terminal.

17. The grid-tie distribution box of claim 16, wherein, The first connector and the second connector have different lengths.

18. The grid-tie distribution box of claim 16, wherein, At least one of the first output terminal block and the second output terminal block has an opening into which the first connector or the second connector is inserted, and the opening extends through in the longitudinal direction.

19. The grid-tie distribution box of claim 16, wherein, The power grid module also includes a relay socket, on which the relay module is mounted, and the relay socket protrudes from the surface of the second output terminal block.

20. The grid-connected distribution box according to claim 1, further comprising: A transformer, which is arranged inside the housing; as well as A heat dissipation structure is formed on the surface of the housing facing the transformer.

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