Grid-tie distribution box and circuit breaker assembly

Abstract

A grid-connected distribution box and circuit breaker assembly are provided. The grid-connected distribution box includes: a housing having an internal space; a power grid module disposed in the internal space and having a main input terminal into which main power is input; a control module disposed adjacent to the power grid module and having a control board connected to the power grid module and sub-input terminals connected to at least one sub-power supply device; and a circuit breaker module disposed in the internal space and having a plurality of circuit breakers connected to the control board and one or more brackets for fixing the plurality of circuit breakers.

Description

Technical Field

[0001] This disclosure relates to a grid-connected distribution box with a circuit breaker fixed structure and a circuit breaker assembly. 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 power grid, multiple branch circuit breakers, and busbars connecting these components.

[0003] Modern distribution boxes have gone beyond simple power distribution and are incorporating 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 existing distribution boxes are assembled sequentially during the manufacturing process and are configured to be coplanar. Therefore, when multiple circuit breakers are installed inside the enclosure, unusable space is created, reducing space utilization. In some embodiments, the deep placement of the working positions presents the disadvantages of potential misassembly and complex post-processing. Summary of the Invention

[0005] This disclosure aims to provide a grid-connected distribution box and circuit breaker assembly, wherein the grid-connected distribution box improves space utilization and operational convenience.

[0006] One aspect of this disclosure provides a grid-connected distribution box, the grid-connected distribution box comprising: a housing having an internal space; a power grid module disposed in the internal space and having a main input terminal on which main power is input; a control module disposed adjacent to the power grid module and having a control board connected to the power grid module and a sub-input terminal connected to at least one sub-power supply device; and a circuit breaker module disposed in the internal space and having a plurality of circuit breakers connected to the control board and one or more brackets for fixing the plurality of circuit breakers.

[0007] In some embodiments, the circuit breaker module may include: a base frame having a flat plate shape, on which the plurality of circuit breakers are disposed; a first bracket connected to the base frame and having a first support member and a second support member facing each other; and a second bracket connecting the first support member to the second support member.

[0008] In some embodiments, the circuit breaker module may further include a circuit breaker mounting section disposed on the base frame, and the plurality of circuit breakers are mounted on the circuit breaker mounting section.

[0009] In some embodiments, the circuit breaker module may further include a fastening rail extending in the longitudinal direction of the base frame, to which hooks of each of the plurality of circuit breakers are assembled.

[0010] In some embodiments, the circuit breaker module may further include a retaining pin, to which the connection portion of each of the plurality of circuit breakers is inserted.

[0011] In some embodiments, the plurality of circuit breakers may have switches and stepped portions having a step difference from the switches, and the second bracket may be inserted between the stepped portions of the plurality of circuit breakers.

[0012] In some embodiments, each of the plurality of circuit breakers may have a connection portion disposed below the stepped portion and inserted into a retaining pin.

[0013] In some embodiments, in the circuit breaker module, the plurality of circuit breakers may be arranged along a first direction, the first direction being a longitudinal direction, and at least one of the plurality of circuit breakers may be arranged along a second direction, the second direction being a width direction.

[0014] In some embodiments, the circuit breaker module may include: a first bracket having a first support and a second support, the first support and the second support being disposed on opposite sides along the first direction and supporting the plurality of circuit breakers; and a second bracket connecting the first support to the second support and supporting a pair of adjacent circuit breakers in the second direction.

[0015] In some embodiments, the circuit breaker module may be mounted on the power grid module and the control module.

[0016] Another aspect of this disclosure provides a circuit breaker assembly comprising: a base frame; a plurality of circuit breakers disposed on the base frame; a first bracket connected to the base frame and having a first support member and a second support member facing each other; and a second bracket connecting the first support member to the second support member.

[0017] In some embodiments, the circuit breaker assembly may further include a circuit breaker mounting portion disposed on the base frame, and the plurality of circuit breakers are mounted on the circuit breaker mounting portion.

[0018] In some embodiments, the circuit breaker mounting portion may include: a fastening rail to which a hook of each of the plurality of circuit breakers is assembled; and a retaining pin to which a connecting portion of each of the plurality of circuit breakers is inserted.

[0019] In some embodiments, the plurality of circuit breakers may have switches and stepped portions having a step difference from the switches, and the second bracket may be inserted between the stepped portions of the plurality of circuit breakers.

[0020] In some embodiments, each of the plurality of circuit breakers may have a connection portion disposed below the stepped portion and inserted into a retaining pin. Attached Figure Description

[0021] The above and other aspects, features and advantages of certain 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 circuit breaker fixing structure according to an embodiment of the present disclosure; Figure 2 This is a perspective view illustrating an embodiment of a grid-connected distribution box; Figure 3 It is shown 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 relay module are assembled along Figure 3 A cross-sectional view taken from line V-V'; Figure 6 It is shown Figure 3 The view of the control module; Figure 7 It is shown Figure 3 The view of the neutral line module; Figure 8 This is a cross-sectional view showing adjacent portions of the control module and the neutral line module; Figure 9 for Figure 3 Exploded perspective view of the circuit breaker module; Figure 10 It is shown Figure 3 A view showing the state of the circuit breaker module assembled in a grid-connected distribution box; and Figure 11 It is shown Figure 2 A schematic diagram of the circuit of the grid-connected distribution box. Detailed Implementation

[0022] 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 specific implementation. 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.

[0023] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the description with reference to the drawings, identical or corresponding parts are given the same reference numerals, and repeated descriptions are omitted.

[0024] In the following embodiments, the terms first, second, etc., are not restrictive in meaning, but are used for the purpose of distinguishing one component from another.

[0025] In the following embodiments, the singular forms “a,” “an,” and “the” are intended to also include the plural forms, unless the context explicitly indicates otherwise.

[0026] In the following embodiments, it should be further understood that the terms “comprising,” “including,” and “having” specify the presence of a stated feature or component, but do not exclude the presence or addition of one or more other features or components.

[0027] 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 located directly above another component, but also the case where other regions, components, etc. may be located between them.

[0028] 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.

[0029] In the following embodiments, it should be understood that when a region, component, etc. is referred to as being connected to another component, it may be directly connected to the other component, or there may be an intermediate component.

[0030] Figure 1 This is a schematic block diagram illustrating a grid-connected distribution box 1 with a circuit breaker fixing 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.

[0031] Reference Figure 1The grid-connected distribution box 1 can be electrically connected to the main power supply network (GRID), one or more sub-power supply devices E1 and E2, and multiple loads, namely load 1 and load 2, and the grid-connected distribution box 1 can control the power flow. The grid-connected distribution box 1 can distribute the power input from the main power supply network or sub-power supply devices E1 and E2, and supply the input power to load 1 and load 2.

[0032] According to one 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, etc.

[0033] Sub-power supply devices E1 and E2 can be configured as power supply devices or systems of a different type from the main power supply network.

[0034] As an example, sub-power supply devices E1 and E2 can be configured as photovoltaic (PV) power generation systems. Sub-power supply devices E1 and E2 can each be PV power generation systems comprising PV modules and devices connected to the PV modules. 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 device 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 device can be module-level power electronics (MLPE). The device can be an optimizer or a micro-inverter (MI).

[0035] Optionally, sub-power supply devices E1 and E2 may each also include a coupler connected to the device. At least some devices 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 power combined by the coupler can be supplied to the grid-connected distribution box 1.

[0036] As another example, sub-power supply devices E1 and E2 can be configured as an energy storage system (ESS). Sub-power supply devices E1 and E2 can store electricity generated by photovoltaic modules or supplied from the grid, and can efficiently supply power to grid-connected distribution box 1 according to the needs of load 1 and load 2. Sub-power supply devices 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 grid-side power. In this case, the PCS can include a bidirectional direct current (DC) to DC converter connected to the battery to convert voltage, and a bidirectional inverter connecting the bidirectional DC to DC converter to the outside of the ESS.

[0037] Load 1 and Load 2 refer to devices installed in electricity consumers, such as residences, commercial facilities, factories, etc., and that operate by receiving electrical energy distributed via grid-connected distribution box 1. That is, Load 1 and Load 2 can include various types of devices, equipment, facilities, etc., that operate by receiving electrical energy supplied from the main power supply network or sub-power supply equipment E1 and E2.

[0038] 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 sub-power supply device E1, and to the ESS as the second sub-power supply device E2. The grid-connected 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 supply network and / or the sub-power supply devices E1 and E2.

[0039] Reference Figure 1 and 2 In the grid-connected distribution box 1, a housing 10 with an internal space can be provided so that it can be opened or closed by a cover 11, and components can be installed in the internal space of the housing 10.

[0040] The grid-connected distribution box 1 may include a power grid module 100, a relay module 200, a control module 300, a neutral line module 400, a circuit breaker module 500, a communication module 600, and a transformer 700 inside the housing 10.

[0041] The power grid module 100 can be disposed inside the housing 10, 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).

[0042] 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.

[0043] The control module 300 can be connected to at least one sub-power supply device. For example, the control module 300 can be connected to at least one of the first sub-power supply device E1 and the second sub-power supply device E2 to receive power.

[0044] The sub-power supply device can be configured as an emergency power supply device for a generator unit, a power generation system inverter, or an ESS. However, one or more embodiments are not limited thereto, and any power supply device can be used as a sub-power supply device, as long as the power supply device can supply stable alternating current (AC) power to the control module 300.

[0045] The control module 300 can be connected to the relay module 200 and can perform control to transmit power supplied from the sub-power supply equipment 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 supply equipment to the load.

[0046] The neutral line module 400 can be electrically connected to the control module 300 and can be positioned adjacent to the power grid module 100. The neutral line module 400 can be connected to the neutral line of the main power supply network and the neutral line of the load, thereby fixing these neutral lines.

[0047] In one embodiment, the grid module 100 can be connected to the active line of the main power supply network, allowing power to be input. The grid module 100 can also be connected to the active line of load 1 or load 2, allowing power to be input. In this case, the neutral line module 400 can be connected to the common neutral line of the main power supply network, allowing power to be input. The neutral line module 400 can be connected to both load 1 and load 2, allowing power to be input. The grid-connected distribution box 1 can receive and distribute power at a constant voltage by the phase voltage generated between the active and neutral lines.

[0048] Circuit breaker module 500 may include a typical circuit breaker to interrupt power transmission in grid-connected distribution box 1. Circuit breaker module 500 may be electrically connected to control module 300, and circuit breaker module 500 may stop the power supply when an abnormality occurs.

[0049] According to one embodiment, the circuit breaker module 500 may be disposed on top of the control module 300 to overlap with the control module 300. For example... Figure 2 As shown, the circuit breaker module 500 can be set and stacked on the control module 300, so that the grid-connected distribution box 1 can have a simple internal structure and a compact size.

[0050] The circuit breaker module 500 can be disposed within the internal space of the housing 10, and can have a circuit breaker 510 connected to the control board 310 and at least one bracket for fixing the circuit breaker 510. The circuit breaker module 500 will be described in detail below.

[0051] The communication module 600 can be electrically connected to the control module 300 and can perform communication processing according to control signals. The communication module 600 may include a switched-mode power supply (SMPS) board for converting AC current to DC current and an interface board for processing signals between circuits.

[0052] The transformer 700 can be housed within the interior space of the housing 10. As an example, the transformer 700 can be configured 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.

[0053] 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 provided to dissipate heat generated from the outside when the transformer 700 and other internal components are operating. According to one embodiment, a 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.

[0054] Optionally, the grid-connected distribution box 1 may also include a grounding module 800. The grounding module 800 can ground the circuit via a conductor and can allow current to be discharged. When an abnormal voltage occurs, the grounding module 800 can allow current to be discharged, thereby allowing the devices to maintain the same potential.

[0055] Figure 3 It is shown Figure 2 An exploded perspective view of a portion of the grid-connected distribution box 1.

[0056] Reference Figure 3The power grid module 100, relay module 200, control module 300, neutral line module 400 and circuit breaker module 500 can be arranged adjacent to each other.

[0057] For ease of description, in the following text, in the grid-connected distribution box 1, the side where the neutral line module 400 is installed is defined as the front side, and the side where the transformer 700 is placed is defined as the rear side.

[0058] 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 disposed on one side of the first base 1001.

[0059] The first substrate 1001 may have a stepped 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.

[0060] The control module 300 may be generally plate-shaped and may be disposed on the right side of the interior space of the housing 10. The control module 300 may be disposed parallel to the power grid module 100 in the left-right direction.

[0061] The control module 300 may have a first base structure 3001, such that a first step portion 30021 may be formed on its front side, and a power grid module support member 30012 adjacent to the power grid module 100 may be formed on its side, with at least one sub-input terminal mounted on the first step portion 30021.

[0062] The first step portion 30021 can be formed to protrude upward from the base surface of the first base structure 3001. A cutout portion 30022 can be provided below the first step portion 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 line module 400 can be partially inserted into the cutout portion 30022.

[0063] The first stepped portion 30021 can protrude from the bottom surface inside the housing 10, so the sub-input terminal mounted on the first stepped portion 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 set at the upper side of the housing 10, thereby improving the convenience of the operation.

[0064] 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.

[0065] According to one embodiment, the opposing 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.

[0066] In some embodiments, the control module 300 may have a first post 30041 and a second post 30042 extending from the first base structure 3001 in the height direction. The circuit breaker module 500 may be disposed on the first post 30041 and the second post 30042.

[0067] The circuit breaker module 500 may have multiple threaded holes in its peripheral portion and may be mounted on the first post 30041 and the second post 30042 of the control module 300. As shown in the figure, the circuit breaker module 500 may be mounted on the control module 300 such that when the grid-connected distribution box 1 is opened, the switch contact surface of the circuit breaker module 500 can be configured to face outwards. Therefore, an operating position for the circuit breaker module 500 can be provided on the upper side of the housing 10, thereby improving operational convenience.

[0068] The neutral line module 400 can be formed to extend in the width direction of the housing 10 and can be disposed at the front side of the interior space of the housing 10. The neutral line module 400 can be arranged adjacent to the control module 300 in the front-back direction.

[0069] The neutral line module 400 may have a second base structure 4001, such that the second step portion 40021 may be disposed on one side of the second plate 40011, and the neutral line terminal mounting portion 40031 may be disposed on the other side of the second plate 40011.

[0070] The second step portion 40021 may be provided 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 plate 40011 of the second base structure 4001.

[0071] The neutral terminal mounting part 40031 can be provided on the other side of the second base structure 4001. The neutral terminal mounting part 40031 can be provided on the second plate 40011 of the second base structure 4001.

[0072] In the second base structure 4001, the second plate 40011 can be inserted into the cutout portion 30022 of the first base structure 3001.

[0073] According to one embodiment, the opposing 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 line module 400 can at least partially overlap each other for a more compact installation.

[0074] According to one embodiment, the second plate 40011 of the neutral line module 400 can be arranged to overlap with the first stepped portion 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, and the circuit breaker module 500 can be mounted on the first post 30041 and the second post 30042 of the control module 300.

[0075] Therefore, in the grid-connected distribution box 1 according to one embodiment, since the grid module 100, relay module 200, control module 300, neutral module 400 and circuit breaker module 500 partially overlap each other, the internal modules can be installed more compactly.

[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 along Figure 3 A cross-sectional view taken from 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 a circuit.

[0078] The power grid module 100 may include a first base 1001 having a stepped difference, and main input terminals 110 and one or more output terminals 130 and 150 arranged at different levels along the stepped 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 one embodiment, the first substrate 1001 may include a main terminal mounting portion 10011 formed on its upper surface, a first output terminal mounting portion 10021 disposed below the main terminal mounting portion 10011, and a second output terminal mounting portion 10022 disposed below the first output terminal mounting portion 10021.

[0081] The main input terminal 110 can be mounted on the main terminal mounting part 10011, the first output terminal 130 can be mounted on the first output terminal mounting part 10021, and the second output terminal 150 can be mounted on the second output terminal mounting part 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 levels.

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

[0083] 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.

[0084] 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.

[0085] The power grid module 100 can form a circuit that is connected to the relay module 200 via 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 mounted on a first base 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 active line 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 disposed on the main terminal mounting section 10011. The main input terminal 110 can be disposed 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 contact fixing member 1201, which is plate-shaped, allowing it to be mounted on the main terminal mounting portion 10011. The main input terminal 110 may be mounted on the contact fixing member 1201. In this case, the other end portion of the main input contact 120 may be shaped to extend from the contact fixing member 1201 toward the first relay contact 220.

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

[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 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.

[0091] The first connector 140 may be disposed on the first output terminal mounting portion 10021. The first opening S1 may be formed to pass through the first output terminal mounting portion 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 circuit that connects the main input terminal 110 to the first output terminal 130 via the first relay contact 220. Therefore, 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 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 contact 220 above the bottom surface of the first output terminal mounting portion 10021, and can form a large spacing distance with the second connector 160.

[0094] The second output terminal 150 can be connected to a second load, namely 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.

[0095] The second connector 160 may be disposed on the second output terminal mounting portion 10022. The second opening S2 may be formed to pass through the second output terminal mounting portion 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 contact 260 of the relay module 200 and another end portion connected 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 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 mounting portion 10022 and may be stably mounted.

[0098] According to one 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 portion 10022 may be greater than the length of the first output terminal mounting portion 10021.

[0099] 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.

[0100] 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 be easily performed during the assembly of the power grid module 100.

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

[0102] The first base 1001 of the power grid module 100 may further include a relay mounting portion 10012 protruding from the surface of the second output terminal mounting portion 10022. The relay mounting portion 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 placed on the relay mounting part 10012 so that the assembly part 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 control module 300. The relay module 200 can receive power from either the first sub-power supply device E1 or the second sub-power supply device E2 connected to the control 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 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 network to the load from the circuit that supplies power from the sub-power supply equipment to the load.

[0106] The relay module 200 may include a first relay 210, a first relay contact 220, a spacer 230, a connecting contact 240, a second relay 250, and a second relay contact 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 contact 220 to form a circuit, and the second relay 250 may be connected to a second relay contact 260 to form a circuit.

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

[0109] In this configuration, the second relay 250 can be assembled with the second relay contact 260 onto the second relay contact support 251. The second relay contact 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 from the first sub-power supply device E1 or the second sub-power supply device E2.

[0110] The connecting tab 240 may have a shape that extends vertically 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 the space between them.

[0111] Figure 6 It is shown Figure 3 The view of the control module 300.

[0112] 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 connector 320, a first sub-input terminal 330, a second sub-input connector 340 and a second sub-input terminal 350 disposed on the first base structure 3001.

[0113] 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.

[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 sub-input terminal 330, and the second sub-input terminal 350 mounted on the first base structure 3001 can be prevented.

[0115] According to one embodiment, the first base structure 3001 may include a first plate 30011, a power grid module support 30012, a first step portion 30021, a first column 30041, and a second column 30042.

[0116] The first base structure 3001 may have a stepped difference, such that the control board 310, the first sub-input terminal 330, and the second sub-input terminal 350 can be positioned at different levels and arranged so as not to overlap each other.

[0117] The cutout portion 30022 of the first step section 30021 and the power grid module support component 30012 have been referenced. Figure 3 The description is omitted below.

[0118] The first plate 30011 may have a flat plate shape, and the control plate 310 may be disposed on the first plate 30011.

[0119] The control board 310 can be configured as a circuit board for generating 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, control module 300, neutral line module 400, circuit breaker module 500, communication module 600, and transformer 700.

[0120] For example, 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, control board 310 can control 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 or output from grid module 100 and neutral module 400, grid module 100 can control circuit breaker 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 grid-connected distribution box 1.

[0121] The first step portion 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 portion 30021 may have a first sub-terminal mounting portion 30031 and a second sub-terminal mounting portion 30032.

[0122] The first sub-input terminal 330 can be disposed on the first sub-terminal mounting part 30031, and the second sub-input terminal 350 can be disposed on the second sub-terminal mounting part 30032.

[0123] The protruding block 30033 may be disposed between the first sub-terminal mounting portion 30031 and the second sub-terminal mounting portion 30032. The protruding block 30033 may be formed to protrude from the surface of the first stepped portion 30021.

[0124] The protruding block 30033 can define the first sub-terminal mounting portion 30031 and the second sub-terminal mounting portion 30032. The first sub-input terminal 330 and the second sub-input terminal 350 can be supported on the first step portion 30021 and fixed in place by the protruding block 30033. In some embodiments, the first sub-input terminal 330 and the second sub-input terminal 350 can be separated by the protruding block 30033 to prevent interference between circuits.

[0125] The first pillar 30041 may be formed to protrude from the first plate 30011 in the height direction, and the second pillar 30042 may be formed to extend from the first step portion 30021. The uppermost ends of the first pillar 30041 and the second pillar 30042 may be formed to have the same height.

[0126] According to one embodiment, power can be input to the control module 300 through the first sub-input connector 320, the first sub-input terminal 330, the second sub-input connector 340, and the second sub-input terminal 350.

[0127] The first sub-input terminal 330 can be connected to the first sub-power supply device E1, allowing power to be applied. The first sub-input terminal 330 can be connected to the active line of the first sub-power supply device E1. The first sub-input terminal 330 can be mounted on the first sub-input connector 320.

[0128] The first sub-input connector 320 may be disposed on the first sub-terminal mounting portion 30031. The first sub-input connector 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 connector 320 may be connected to the relay module 200 via a wire, and the first sub-input connector 320 may form a circuit for transmitting power to the relay module 200 under the control of the control board 310.

[0129] The second sub-input terminal 350 can be connected to the second sub-power supply device E2, allowing power to be applied. The second sub-input terminal 350 can be connected to the active line of the second sub-power supply device E2. The second sub-input terminal 350 can be mounted on the second sub-input connector 340.

[0130] The second sub-input connector 340 may be disposed on the second sub-terminal mounting portion 30032. The second sub-input connector 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 connector 340 may be connected to the relay module 200 via a wire, and the second sub-input connector 340 may form a circuit for transmitting power to the relay module 200 under the control of the control board 310.

[0131] According to one embodiment, the first sub-input connector 320 and the second sub-input connector 340 can be bent upwards. The first sub-input connector 320 and the second sub-input connector 340 can be bent to correspond to the step difference between the first plate 30011 and the first step portion 30021. That is, the first sub-input connector 320 and the second sub-input connector 340 can be bent along the shape of the first step portion 30021, such that one end portion of the first sub-input connector 320 and one end portion of the second sub-input connector 340 can be disposed on the first step portion 30021, while the other end portions of the first sub-input connector 320 and the other end portions of the second sub-input connector 340 can be disposed on the control plate 310.

[0132] Figure 7 It is shown Figure 3 The view of the neutral line module 400.

[0133] Reference Figure 1 and Figure 7 The neutral line module 400 may include a second base structure 4001 and a neutral line input terminal 410, a neutral line connection piece 420, a first neutral line output terminal 430 and a second neutral line output terminal 450 disposed on the second base structure 4001.

[0134] The neutral line module 400 may be disposed adjacent to the control module 300 and may include a neutral line input terminal 410 connected to the main power supply network and one or more neutral line output terminals 430 and 450 connected to one or more loads.

[0135] 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.

[0136] 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.

[0137] According to one embodiment, the second base structure 4001 may include a second plate 40011, a second step portion 40021, and a neutral line terminal mounting portion 40031.

[0138] The second plate 40011 may have a flat plate shape extending in the left-right direction, and a portion thereof may be inserted into the cutout portion 30022 of the control module 300.

[0139] The second step portion 40021 may be formed from a portion of the surface of the second 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 disposed on the second step portion 40021.

[0140] The first current sensor CT1 and the second current sensor CT2 can each be configured to be the same as the current sensor CT described above, which is mounted on the main input connector 120. However, for the sake of distinction, the current sensor CT, the first current sensor CT1, and the second current sensor CT2 will be described with different names.

[0141] The neutral terminal mounting portion 40031 may have a flat plate shape extending from the second plate 40011, thereby forming a space for mounting the neutral connection piece 420.

[0142] The neutral line connection piece 420 can be configured as a plate-shaped terminal having an area corresponding to the neutral line terminal mounting part 40031, and the neutral line input terminal 410, the first neutral line output terminal 430 and the second neutral line output terminal 450 can be mounted on the neutral line connection piece 420.

[0143] 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 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.

[0144] 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 current flows in the neutral module 400. Therefore, the neutral current supplied from the main power grid can be distributed to the first load and the second load, namely load 1 and load 2.

[0145] According to one embodiment, the edge of the neutral connection patch 420 may include a controller connection portion 420C, a transformer connection portion 420A, and a ground connection portion 420G.

[0146] The controller connection portion 420C can be connected to the control board 310 of the control module 300, thus allowing control of 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, enabling voltage transformation of the neutral current. The grounding connection portion 420G can be connected to the grounding module 800, thereby allowing the discharge of the neutral current.

[0147] Figure 8 This is a cross-sectional view showing adjacent portions of the control module 300 and the neutral line module 400.

[0148] 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 can be applied in kind to the mounting portion of the second current sensor CT2 adjacent to the second sub-input terminal 350.

[0149] Reference Figure 1 and Figure 8The control module 300 and the neutral line module 400 can partially overlap each other and be arranged close to each other.

[0150] In some embodiments, when the second plate 40011 is inserted into the cut portion 30022, the second step portion 40021 may be configured to face the first step portion 30021.

[0151] The first current sensor CT1, which is mounted on the second step portion 40021, can be configured to face the first sub-input terminal 330 mounted on the first step portion 30021, and the second current sensor CT2 can be configured to face the second sub-input terminal 350.

[0152] According to one 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 device 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 device E1 can be measured by the first current sensor CT1.

[0153] When the current sensed by the first current sensor CT1 is normal, the power supplied from the first sub-power supply device E1 can be input to the first sub-input terminal 330. When the first current sensor CT1 detects an abnormality such as overcurrent, the current flowing to the first sub-input terminal 330 can also be blocked.

[0154] As described above, when power is normally input to the first sub-input terminal 330, power can be transmitted through the terminal-side end portion 3201 of the first sub-input connector 320 to the control board 310 connected to the control board-side end portion 3202.

[0155] Figure 9 for Figure 3 Exploded perspective view of circuit breaker module 500. Figure 10 It is shown Figure 3 A view showing the state of the circuit breaker module 500 assembled in the grid-connected distribution box 1.

[0156] Reference Figure 2 , Figure 3 , Figure 9 and Figure 10 The circuit breaker module 500 can be installed horizontally inside the housing 10. The circuit breaker module 500 can be mounted on the first post 30041 and the second post 30042, and overlap with the control module 300.

[0157] The circuit breaker module 500 can be a modular structure that integrates multiple circuit breakers 510 and can have an assembly structure. Therefore, the circuit breaker module 500 and the circuit breaker assembly can be defined as having the same structure.

[0158] The circuit breaker module 500 may include a first bracket 5002 adjacent to the outer surface of the circuit breaker 510 and a second bracket 5003 adjacent to the upper surface of the circuit breaker 510 on the base frame 5001, the circuit breaker 510 being disposed on the flat base frame 5001.

[0159] Multiple circuit breakers 510 can be arranged in a row in parallel on the base frame 5001. The circuit breakers 510 can be configured as circuit breakers typically used in electric fields. The circuit breakers 510 can detect overloads, short circuits, etc., in the circuit to interrupt current when an overcurrent occurs. Multiple circuit breakers 510 can be configured to be connected to circuits with different loads.

[0160] In one embodiment, the base frame 5001 may have a circuit breaker mounting portion 520, on which a circuit breaker 510 is mounted and electrically connected. The circuit breaker mounting portion 520 may be provided on the base frame 5001, and the circuit breaker 510 may be disposed on the circuit breaker mounting portion 520.

[0161] The circuit breaker mounting section 520 may include a wire connection terminal 521 connected to the relay module 200, a fixing pin 522 connected to the circuit breaker 510, and a fastening rail 523, to which the circuit breaker 510 is physically fastened.

[0162] In another embodiment, where there is no circuit breaker mounting portion 520 on the base frame 5001, the circuit breaker 510 may be mounted on the base frame 5001, and the wire connection terminal 521 and the fastening rail 523 may be mounted on the base frame 5001. In some embodiments, the retaining pin 522 may also protrude from the upper portion of the base frame 5001.

[0163] However, for ease of description, the following description will be based on an example in which the circuit breaker mounting section 520 is mounted on the base frame 5001.

[0164] The wire connection terminal 521 can be connected to the relay module 200 and the relay side wire 530. The wire connection terminal 521 can receive power input from the main power supply equipment or the sub-power supply equipment through the relay side wire 530.

[0165] The retaining pin 522 may have a pin shape that protrudes vertically from the base surface of the circuit breaker mounting portion 520. Multiple retaining pins 522 may be provided, and multiple circuit breakers 510 may be arranged in a row and connected laterally in parallel to each other. The connecting portion 512 of the circuit breaker 510 may be inserted into the retaining pin 522.

[0166] The fastening rail 523 can be configured as a rail extending longitudinally along the long side of the circuit breaker mounting portion 520. The fastening rails 523 can be located on opposite sides of the circuit breaker mounting portion 520 so that they face each other.

[0167] For example, circuit breaker 510 may include a switch 511 that is manually or automatically operated to open or close the contact point of the circuit of circuit breaker 510, a connection portion 512 connected to a fixing pin 522, a hook 513 configured to hook onto a fastening rail 523, and a wire connection portion 514 connected to the wires 540 of the circuit.

[0168] The switch 511 can be disposed on the upper surface of the circuit breaker 510, the connecting portion 512 can be disposed on one side of the lower surface of the circuit breaker 510, and the hook 513 can be disposed on the other side of the lower surface of the circuit breaker 510. The connecting portion 512 can be disposed below the stepped portion 515.

[0169] In the circuit breaker mounting section 520, when the connecting portion 512 of the circuit breaker 510 is connected to the fixing pin 522, the hook 513 located on the side opposite to the fixing pin 522 can engage with and connect to the fastening rail 523. Therefore, the circuit breaker 510 can be stably connected to the circuit breaker mounting section 520.

[0170] like Figure 10 As shown, the wire connection portion 514 can be disposed on another surface of the circuit breaker 510. The wire connection portion 514 can be connected to a wire connected to a load or a wire connected to the control board 310. Therefore, the circuit breaker 510 can open or close the circuit according to the control signal generated by the control board 310, through which power is input or output.

[0171] In some embodiments, the circuit breaker 510 may be disposed adjacent to the switch 511 and may have a stepped portion 515 that has a step difference from the switch 511. As an example, the stepped portion 515 may be disposed on the connection portion 512.

[0172] The stepped portion 515 provides space for the second bracket 5003 to be inserted. The stepped portions 515 of a plurality of circuit breakers 510 may be arranged in a longitudinal direction, and the second bracket 5003 may be inserted between the stepped portions 515 extending in the longitudinal direction. In some embodiments, a pair of circuit breakers 510 may be arranged facing each other in the width direction, and the second bracket 5003 may be inserted between the facing stepped portions 515. The second bracket 5003 may support the bottom or side surfaces of the stepped portion 515 to stably fix the position of the circuit breaker 510.

[0173] The first bracket 5002 can be connected to the base frame 5001 and can be adjacent to the side surface of the circuit breaker 510. The first bracket 5002 can be configured to press and secure a pair of circuit breakers 510 located in the peripheral portion of the plurality of circuit breakers 510.

[0174] As a specific example, the first bracket 5002 may include a first support member 50021 and a second support member 50022. The first support member 50021 is engaged with the base frame 5001 and disposed on one side of the circuit breaker 510. The second support member 50022 is detachably connected to the base frame 5001, spaced apart from the first support member 50021, and disposed on the other side of the circuit breaker 510. The first support member 50021 and the second support member 50022 may be arranged to face each other.

[0175] Multiple circuit breakers 510 can be arranged in a row between the first support member 50021 and the second support member 50022. The first support member 50021 and the second support member 50022 can support multiple circuit breakers 510 in two directions.

[0176] The second bracket 5003 can be connected to the first bracket 5002 and can be adjacent to the upper surface of the circuit breaker 510. In some embodiments, the second bracket 5003 can connect the first support member 50021 to the second support member 50022 and can be configured to contact a portion of the upper surface of the circuit breaker 510. The second bracket 5003 can be configured as a bridging structure connecting the first support member 50021 to the second support member 50022. In this case, the second bracket 5003 can be fixed to the base frame 5001 via the first bracket 5002.

[0177] The number of circuit breakers 510 can be set differently depending on the location or purpose of the grid-connected distribution box 1. In a grid-connected distribution box 1 according to an embodiment of the present disclosure, even if the number of circuit breakers 510 changes, the number of circuit breakers 510 can be stably fixed according to the changing number.

[0178] In some embodiments, the first bracket 5002 may support the opposite sides of a plurality of circuit breakers 510 parallel in the longitudinal direction, and the second bracket 5003 may be disposed between a pair of circuit breakers 510 parallel in the width direction, thereby stably fixing the plurality of circuit breakers 510 in the height direction.

[0179] In some embodiments, each circuit breaker 510 can be stably fixed at a predetermined position on the circuit breaker mounting portion 520. The connecting portion 512 of the circuit breaker 510 can be inserted into the fixing pin 522, and the hook 513 on the opposite side of the fixing pin 522 can be connected to the fastening rail 523, so that each circuit breaker 510 can be stably fixed to the circuit breaker mounting portion 520.

[0180] In the grid-connected distribution box 1 according to an embodiment of the present disclosure, the circuit breaker module 500 can overlap with the control module 300 to be disposed in the upper part of the housing 10, thereby improving the space utilization inside the housing 10, thereby increasing the degree of freedom in internal design and further reducing the overall size of the distribution box.

[0181] 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 supply devices and can exchange power supplied to multiple loads.

[0182] 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 (load 1) and the circuit for supplying sub-power applied from the first sub-power supply device E1 or the second sub-power supply device E2 to the second load (load 2) are provided separately from each other.

[0183] 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 control module 300 can control the circuit breaker module 500 based on the results sensed by the current sensors, thereby blocking the circuit segment in which the problem has occurred.

[0184] According to one embodiment, main power supplied from the main power supply network can be input to the grid module 100 and the neutral line module 400. In some embodiments, the active line of the main power supply network can be connected to the main input terminal 110, and the common neutral line of the main power supply network can be connected to the neutral line input terminal 410.

[0185] As referenced above Figure 7The neutral line module 400 may independently include circuitry for supplying power applied through the neutral line of the main power supply network to a load. For example, power applied to the common neutral line of the main power supply network may be input to the neutral line input terminal 410 and output to the first neutral line output terminal 430, and may be supplied to a first load (load 1) or output to the second neutral line output terminal 450 to supply to a second load (load 2). Therefore, a description of the neutral line circuitry of the neutral line module 400 will be omitted below.

[0186] The grid-connected 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.

[0187] According to one embodiment, sub-power supplied from the first sub-power supply device E1 and the second sub-power supply device E2 can be input to the control module 300. In some embodiments, the active line of the first sub-power supply device E1 can be connected to the first sub-input terminal 330, and the active line of the second sub-power supply device E2 can be connected to the second sub-input terminal 350.

[0188] The grid-connected 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) through a circuit connected from the first sub-input terminal 330 to the second output terminal 150.

[0189] The grid-connected distribution box 1 may include a power supply circuit through 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.

[0190] Therefore, in the grid-connected distribution box 1, the relay module 200 can be electrically connected to at least one of the first sub-power supply device E1 and the second sub-power supply device E2 to supply power to the second load (load 2). Thus, the grid-connected distribution box 1 can stably supply power to the second load (load 2) and prevent power interruption.

[0191] 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 a relay module 200. That is, the second load (load 2) can receive power input from the main power supply network, or it can receive power input from the first sub-power supply device E1 and the second sub-power supply device E2.

[0192] Therefore, when a power outage occurs due to an abnormality in the main power supply network, the grid-connected distribution box 1 can stably supply power to the second load (load 2) through the first sub-power supply device E1 and the second sub-power supply device E2, and can prevent power outages.

[0193] 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 derived therefrom. Therefore, the true scope of this disclosure should be determined solely by the appended claims.

[0194] In the grid-connected distribution box and circuit breaker assembly according to an embodiment of the present invention, assembly and repair operations can be facilitated by including a structure for arranging the circuit breaker in the upper part of the enclosure.

[0195] In the grid-connected distribution box and circuit breaker assembly according to embodiments of the present disclosure, the circuit breaker can be prevented from disengaging by securely fixing the distribution box when it is moved or used, thereby allowing workers and users to use the distribution box safely.

[0196] In the grid-connected distribution box and circuit breaker assembly according to embodiments of the present disclosure, when a particular circuit breaker malfunctions, the particular circuit breaker can be easily isolated and partially replaced, thereby improving convenience.

[0197] In the grid-connected distribution box and circuit breaker assembly 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.

[0198] According to embodiments of the present disclosure, the grid-connected distribution box and circuit breaker assembly can be connected to multiple power grids. When one power grid experiences an anomaly, the power supply path can be switched to supply stable power to critical loads, thereby reducing the possibility of power outages and improving power supply reliability.

Claims

1. A grid-connected 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 disposed adjacent to the power grid module and has a control board connected to the power grid module and sub-input terminals connected to at least one sub-power supply device; as well as A circuit breaker module is disposed in the internal space and has a plurality of circuit breakers connected to the control panel and one or more brackets for fixing the plurality of circuit breakers.

2. The grid-tie distribution box of claim 1, wherein, The circuit breaker module includes: A base frame having a flat plate shape, on which the plurality of circuit breakers are disposed; A first support, connected to the base frame, and having a first support member and a second support member facing each other; and The second bracket connects the first support member to the second support member.

3. The grid-connected distribution box according to claim 2, wherein, The circuit breaker module also includes a circuit breaker mounting section, which is disposed on the base frame, and the plurality of circuit breakers are mounted on the circuit breaker mounting section.

4. The grid-connected distribution box according to claim 2, wherein, The circuit breaker module also includes a fastening rail extending in the longitudinal direction of the base frame, to which hooks of each of the plurality of circuit breakers are assembled.

5. The grid-connected distribution box according to claim 2, wherein, The circuit breaker module also includes a retaining pin, to which the connection portion of each of the plurality of circuit breakers is inserted.

6. The grid-connected distribution box according to claim 2, wherein, The plurality of circuit breakers have switches and stepped portions that have a step difference from the switches, and The second bracket is inserted between the stepped portions of the plurality of circuit breakers.

7. The grid-connected distribution box according to claim 6, wherein, Each of the plurality of circuit breakers has a connecting portion disposed below the stepped portion and inserted into a fixing pin.

8. The grid-connected distribution box according to claim 1, wherein, In the circuit breaker module, The plurality of circuit breakers are arranged along a first direction, which is a longitudinal direction, and At least one of the plurality of circuit breakers is disposed along a second direction, the second direction being the width direction.

9. The grid-connected distribution box according to claim 8, wherein, The circuit breaker module includes: A first bracket, the first bracket having a first support member and a second support member, the first support member and the second support member being disposed on opposite sides along the first direction and supporting the plurality of circuit breakers; and The second bracket connects the first support member to the second support member and supports a pair of adjacent circuit breakers in the second direction.

10. The grid-connected distribution box according to claim 1, wherein, The circuit breaker module is installed on the power grid module and the control module.

11. A circuit breaker assembly, comprising: Base frame; Multiple circuit breakers are mounted on the base frame; A first support, which is connected to the base frame, and has a first support member and a second support member facing each other; as well as The second bracket connects the first support member to the second support member.

12. The circuit breaker assembly of claim 11, further comprising a circuit breaker mounting portion disposed on the base frame, and wherein the plurality of circuit breakers are mounted on the circuit breaker mounting portion.

13. The circuit breaker assembly according to claim 12, wherein, The circuit breaker mounting section includes: A fastening rail, wherein the hooks of each of the plurality of circuit breakers are assembled to the fastening rail; and A retaining pin is inserted into the connecting portion of each of the plurality of circuit breakers.

14. The circuit breaker assembly of claim 11, wherein, The plurality of circuit breakers have switches and stepped portions that have a step difference from the switches, and The second bracket is inserted between the stepped portions of the plurality of circuit breakers.

15. The circuit breaker assembly of claim 14, wherein, Each of the plurality of circuit breakers has a connecting portion disposed below the stepped portion and inserted into a fixing pin.

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