Distribution board

Abstract

To enable leading and wiring of a wire in a large space before assembling a breaker.SOLUTION: A distribution board has a connector 4 for branching that is interposed when connecting a branch circuit breaker 3 to a branch wiring 9. The connector 4 for branching comprises a first branch unit 4a that has a terminal fitting 41 connected to a secondary side terminal 32 of the branch circuit breaker 3 and is mounted to the branch breaker 3 and a second branch unit 4b that has a wire connecting part 44 to which the branch wiring 9 is connected and is attached to a housing 10 of a distribution board 1. The first branch unit 4a and the second branch unit 4b have a connecting part for connecting them to each other. A connecting part 42 of the first branch unit 4a mounted to the branch circuit breaker 3 and a connecting part 43 of the second branch unit 4b attached to the housing 10 are connected to each other when the branch breaker 3 is assembled to the distribution board 1. This connection makes the secondary side terminal 32 of the branch circuit breaker 3 to be connected to the branch wiring 9.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a distribution board, and more particularly to an improvement in the connection configuration for connecting a drop wire or branch wiring to a breaker mounted on a distribution board. [Background technology]

[0002] Regardless of the type of breaker, whether it is a main breaker or a branch breaker, the breaker assembled to the distribution board is configured so that at least one of the primary side terminal or secondary side terminal is connected by inserting or screwing in an electric wire. In this case, the electric wires are connected by pulling them into the distribution board through an opening provided at the back of the distribution board, and then running them around to the breaker to be connected (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-60879 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional wire connection configuration to the breaker, even if a large opening for inserting or routing the wire is formed on the back of the distribution board, the wire is connected after the breaker is assembled, so most of the opening is blocked by the assembled breaker, making it difficult to insert or route the wire. Furthermore, if the circuit breaker to which the cable is connected is located far from the cable pull-in position, the cable must be made longer accordingly, so it is necessary to leave a large amount of excess cable length.

[0005] In view of the above problems, the present invention aims to provide a distribution board that allows for the drawing in and wiring of electric wires in a large space before the breaker is installed. [Means for solving the problem]

[0006] In order to solve the above problem, the invention of claim 1 is a distribution board in which a main breaker and multiple branch breakers are assembled, and a branch connector is arranged to be used when connecting the secondary terminals of the branch breakers to the branch wiring, and the branch connector comprises a first branch unit having terminal fittings connected to the secondary terminals of the branch breaker and attached to the branch breaker, and a second branch unit having an electric wire connection portion to which the branch wiring is connected and attached to the housing of the distribution board, and the first branch unit and the second branch unit each have connecting portions that enable electrical connection between the terminal fittings and the electric wire connection portion, and the connecting portion of the first branch unit attached to the branch breaker and the connecting portion of the second branch unit attached to the housing are connected to each other when the branch breaker is assembled to the distribution board, and the secondary terminals of the branch breakers are connected to the branch wiring. With this configuration, the branch wiring is connected to the branch breaker by connecting the branch wiring to the second branch unit attached to the distribution board housing of the branch connector. This makes it possible to connect the branch wiring in a large space before assembling the branch breaker to the distribution board, making the branch wiring connection work easier.

[0007] The invention of claim 2 is characterized in that, in the configuration described in claim 1, the terminal fittings connected to the branch breaker of the first branch unit and the wire connection portion connecting the branch wiring of the second branch unit face in the same direction. With this configuration, the terminal fittings and the wire connection parts are oriented in the same direction, so the wires connected to the wire connection parts are arranged in the opposite direction to the direction in which they would be directly connected to the branch breaker. This allows for smooth connection of the wires pulled in from the back of the distribution board, eliminating the need to route the wires through the narrow space next to the branch breaker as in the past. The term "same direction" includes not only exactly the same direction but also almost the same direction.

[0008] The invention of claim 3 is a distribution board in which a main breaker and multiple branch breakers are assembled, and which is provided with a main connector that is used when connecting the primary terminal of the main breaker to a service line, and which comprises a first main unit that has terminal fittings connected to the primary terminal of the main breaker and is attached to the main breaker, and a second main unit that has an electric wire connection portion to which the service line is connected and is attached to the housing of the distribution board, and the first main unit and the second main unit each have connecting portions that enable electrical connection between the terminal fittings and the electric wire connection portion, and the connecting portion of the first main unit attached to the main breaker and the connecting portion of the second main unit attached to the housing are connected to each other when the main breaker is assembled to the distribution board, and the primary terminal of the main breaker is connected to the service line. With this configuration, the service line is connected to the main breaker by connecting it to the second main unit attached to the distribution board housing of the main connector. This makes it easier to connect the service line in the large space before assembling the main breaker to the distribution board.

[0009] The invention of claim 4 is characterized in that, in the configuration described in claim 3, the terminal fittings connected to the main breaker of the first main unit and the wire connection portion connecting the incoming wire of the second main unit face in the same direction. With this configuration, the terminal fittings and the wire connection parts are oriented in the same direction, so the wires connected to the wire connection parts are arranged in the opposite direction to the direction in which they would be directly connected to the main breaker. This allows for smooth connection of the wires pulled in from the back of the distribution board, eliminating the need to route the wires through the narrow space next to the main breaker as in the past. [Effects of the Invention]

[0010] According to the present invention, the branch wiring is connected to the branch breaker by connecting the branch wiring to the second branch unit attached to the distribution board housing of the branch connector. This makes it possible to connect the branch wiring in a large space before assembling the branch breaker to the distribution board, making the branch wiring connection work easier. In addition, the service line is connected to the main breaker by connecting it to the second main unit attached to the distribution board housing of the main connector. This makes it easy to connect the service line in the large space before installing the main breaker in the distribution board. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an example of a distribution board according to the present invention. [Figure 2] 2 is a perspective view of the distribution board in which a base on which the breaker of FIG. 1 is assembled is separated from a distribution board housing. [Figure 3] This is an extracted view of the group of branch breakers in the upper part of Figure 1, and also shows some of the branch connectors connected to the branch breakers. [Figure 4] 2A and 2B show a state in which the first branching unit and the second branching unit are separated, in which (a) is a perspective view seen from the angle shown in FIG. 1, and (b) is a perspective view seen from the opposite direction. [Figure 5] The positions of the terminal fittings of the first branch unit are shown, where (a) shows a configuration with terminal fittings for the first voltage pole and neutral pole, and (b) shows a configuration with terminal fittings for the second voltage pole and neutral pole. [Figure 6] 1A, 1B, and 1C show the internal structure of the first branching unit, where FIG. 1A is a plan view, FIG. 1B is a cross-sectional view taken along line AA, and FIG. 1C is a cross-sectional view taken along line BB. [Figure 7] FIG. 10 is a perspective view of an electrical circuit fitting disposed inside the first branching unit. [Figure 8] FIG. 1 is a perspective view of the main breaker and the first main unit of the main connector, showing the first main unit separated. [Figure 9]9A and 9B show the first and second main trunk units separated from each other, where (a) is a perspective view seen from the angle shown in FIG. 8, and (b) is a perspective view seen from the opposite direction. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of the present invention will be described in detail below with reference to the drawings. Figures 1 and 2 show an example of a distribution board according to the present invention, with Figure 1 being a perspective view of the distribution board and Figure 2 showing a base on which breakers are mounted separated from the housing of the distribution board. A main breaker 2 and multiple branch breakers 3 are mounted within the housing 10 of the distribution board 1. The cover member that covers the front of the distribution board is omitted.

[0013] A branch connector 4 is connected to a secondary terminal 32 (shown in FIG. 3) of the branch breaker 3, and an electric wire of the branch wiring 9 is connected to the secondary terminal 22 via this branch connector 4 as will be described later. A main connector 5 is connected to the primary terminal 21 of the main breaker 2, and the electric wire of the drop line 8 is connected to the primary terminal via this main connector 5 as will be described later.

[0014] The branch connector 4 is made up of a first branch unit 4a attached to the branch breaker 3 and a second branch unit 4b attached to the housing 10 of the distribution board 1. The main connector 5 is made up of a first main unit 5a attached to the main breaker 2 and a second main unit 5b attached to the housing 10 of the distribution board 1.

[0015] 2, the branch wiring 9 is connected to a second branch unit 4b attached to the housing 10. Furthermore, the lead-in wire 8 is connected to a second main unit 5b attached to the housing 10. With this connection, the connection of the branch wiring 9 and the lead-in wire 8 to the distribution board 1 is completed.

[0016] Here, we will explain unit D, which has a main breaker 2 and branch breakers 3 assembled to a base 11. Unit D has a main breaker 2, a branch breaker 3, and a main bar 12 made of a copper bar that connects the main breaker 2 and the branch breaker 3 assembled to a base 11 made of a metal plate. However, the main bar 12 is covered with a protective cover 13.

[0017] The service line 8 is composed of a single-phase three-wire circuit with two voltage phases (voltage poles) L1 and L2 and a neutral phase (neutral pole) N, and the main breaker 2 has three terminals, including a primary terminal 21 and a secondary terminal 22, and the main bar 12 is composed of three copper bars. Two specific copper bars are selected and connected to the primary terminal 31 of the branch breaker 3. By selecting two of the three copper bars, 100V / 200V is selected and output to the branch wiring 9 connected to the secondary side.

[0018] 3 is a diagram of the group of branch breakers 3 in the upper row of FIG. 1, and also shows the first branch units 4a that form part of the branch connectors 4 connected to the branch breakers 3. However, one of the first branch units 4a is shown in a detached state. As shown in Fig. 3, the branch breaker 3 has a primary terminal 31 formed with three recesses, which are configured to grip and connect to the inserted main bar 12. Terminal fittings are placed in two of the three recesses and connected to the main bar 12. The secondary terminal 32 has three terminals, but the unused terminals are covered with a cover member 33, leaving the two used terminals exposed. The secondary terminal 32 is a quick-connect terminal.

[0019] 3, the branch breaker 3 with the first branch unit 4a removed has the secondary terminal 32 of the neutral pole N blocked and the secondary terminals 32 of the two voltage poles L1 and L2 used, i.e., a configuration in which 200 V is branched and output. The corresponding first branch unit 4a also has terminal fittings 41 (described later) arranged so as to be connected to the secondary terminals 32 of the two voltage poles L1 and L2.

[0020] Next, the branch connector 4 will be described in detail. Fig. 4 shows the state in which the first branching unit 4a and the second branching unit 4b of the branching connector 4 are separated, with (a) being a perspective view seen from the angle shown in Fig. 1 and (b) being a perspective view seen from the opposite direction. Fig. 5 also shows the positions of the terminal fittings of the first branching unit 4a, with (a) showing a configuration with terminal fittings 41 of the first voltage pole L1 and the neutral pole N, and (b) showing a configuration with terminal fittings 41 of the second voltage pole L2 and the neutral pole N. 4 shows a configuration including terminal fittings 41 connected to the first voltage pole L1 and the neutral pole N.

[0021] The terminal fitting 41 provided on the first branching unit 4a is formed with a pair of rod-shaped protrusions that can be connected to the secondary terminal 32, which is made up of a quick-connect terminal of the branch breaker 3. On the other hand, the connecting portion 42 with the second branching unit 4b has a recess and is formed in a female shape. Also, a voltage detector 4c is provided on the surface opposite to the surface on which the terminal fittings 41 are provided. The voltage detector 4c is provided for each terminal fitting 41, and is provided in pairs.

[0022] In this way, the first branching unit 4a is formed independently for each branch breaker 3, but the second branching unit 4b has multiple rows of connecting portions with the first branching unit 4a as shown in Figure 4, and is formed so that one second branching unit 4b can correspond to multiple branch breakers 3. The connecting portion 43 of the second branching unit 4b is formed in a male shape with a protrusion, and this protrusion is made of a connecting metal fitting 43a, which is inserted into the connecting portion 42 formed in the recess of the first branching unit 4a to connect and establish an electrical connection. Also, in accordance with each connecting portion 43, electric wire connecting portions 44 for connecting the branch wiring 9 are provided.

[0023] Figures 6 and 7 show the internal structure of the first branching unit 4a, with Figure 6(a) being a plan view with the surface where the voltage detector 4c is located facing forward, Figure 6(b) being a cross-sectional view along line AA, Figure 6(c) being a cross-sectional view along line BB, and Figure 7 being a view of the electrical circuit fittings 45 arranged inside the first branching unit 4a. 6 and 7, the connecting portion 42 and the terminal fitting 41, which are formed as a pair, have corresponding poles internally connected to two electric circuit fittings 45. The connecting portion 42 has a gripping fitting 42a that grips the connecting fitting 43a that forms the protrusion of the inserted second branching unit 4b, and the electric circuit fitting 45 has an electric detector fitting 45a in the middle that is exposed to the electric detector port 4c.

[0024] 4, the second branching unit 4b has a wire connection portion 44 for connecting the branch wiring 9, and is formed so that the surface on which the wire connection portion 44 is arranged is substantially perpendicular to the surface on which the linking portion 43 for connecting to the first branching unit 4a is arranged. That is, the protruding direction of the terminal fittings 41 of the first branching unit 4a and the wire connection portion 44 of the second branching unit 4b face substantially the same direction. The linking fittings 43a of the linking portion 43 and the wire connection portion 44 each form a pair, and corresponding poles are internally linked. The electric wire connecting portion 44 is a quick-connect terminal (not shown) that clamps the inserted electric wire (branch wiring 9) to establish an electrical connection.

[0025] This second branch unit 4b is attached to match the installation position within the housing 10 of the branch breaker 3. More specifically, it is attached to a predetermined portion of the housing 10 so as to be connected to the first branch unit 4a, aligned with the position of the first branch unit 4a attached to the branch breaker 3. At this time, the wire connection portion 44 is positioned facing the branch breaker 3 to be installed, and the branch wiring 9 is connected to the second branch unit 4b from the direction opposite to the connection direction of the secondary terminal 32 of the branch breaker 3. When the branch breaker 3 is mounted in the housing 10 of the distribution board 1, the connecting portions 42, 43 of both are connected to each other, and the branch wiring 9 is connected to the branch breaker 3.

[0026] In this way, the branch wiring 9 is connected to the branch breaker 3 by connecting the branch wiring 9 to the second branch unit 4b attached to the housing 10 of the distribution board 1 of the branch connector 4. Therefore, the connection work of the branch wiring 9 can be performed in a large space before the branch breaker 3 is assembled to the distribution board 1, making the connection work of the branch wiring 9 easy. Furthermore, because the terminal fittings 41 and the electric wire connection parts 44 are oriented in the same direction, the electric wires that are the branch wiring 9 that connect to the electric wire connection parts 44 are arranged in the opposite direction to the direction in which they are directly connected to the branch breaker 3. Therefore, the electric wires that are pulled in from the back of the distribution board 1 can be smoothly connected, and there is no need to route the electric wires in the narrow space next to the branch breaker 3 and connect them as in the past.

[0027] In the above embodiment, the connection between the first branching unit 4a and the second branching unit 4b is configured by inserting and connecting using a concave portion and a convex portion, but the connection between the connecting portions 42 and 43 may be in other forms, for example, they may be connected to each other by screwing them together as screw terminals. Furthermore, if the secondary terminal 32 of the branch breaker 3 is not a quick-connect terminal but is connected by screwing, the terminal fitting 41 of the first branch unit 4a also has a terminal shape that can be fastened by screws. Furthermore, the second branching unit 4b is configured to connect a plurality of first branching units 4a, but may be configured to be independent for each branch breaker 3, similar to the first branching units 4a.

[0028] Next, we will explain the trunk connector 5 that is applied to the trunk breaker 2. Figure 8 is a perspective view of the trunk breaker 2 and the first trunk unit 5a of the trunk connector 5 in Figure 1, with the first trunk unit 5a shown separated. Figure 9 also shows the separated trunk connector 5, with (a) being a perspective view seen from the angle shown in Figure 8 and (b) being a perspective view seen from the opposite direction. The main breaker 2 is composed of three terminals used in a single-phase three-wire circuit, with the primary terminal 21 and secondary terminal 22 being screw-fastened terminals. However, the screws are omitted from the drawing. The first main unit 5a of the main connector 5 is connected to the primary terminal 21. The main bar 12 is connected to the secondary terminal 22.

[0029] The first main unit 5a has three terminal fittings 51 that connect to the primary terminals 21 of the main breaker 2, and are connected by terminal screws (not shown). It also has a connecting portion 52 at its rear end that connects to the second main unit 5b. This connecting portion 52 is formed in a female shape with a recess, and has a gripping fitting 52a inside that grips a connecting fitting 53a (described later) of the second main unit 5b, and the gripping fitting 52a and the terminal fittings 51 are connected within the unit.

[0030] On the other hand, the second main unit 5b has a connecting portion 53 that connects to the first main unit 5a and an electric wire connection portion 54 to which the drop wire is connected. The connecting portion 53 has three protruding connecting fittings 53a and is formed as a male type. The connecting portion 53 and the electric wire connection portion 54 are arranged in a perpendicular direction and are connected to each other within the unit. That is, the protruding direction of the terminal fittings 51 of the first main unit 5a and the electric wire connecting portion 54 of the second main unit 5b are oriented in approximately the same direction.

[0031] This second main unit 5b is attached to a predetermined location in accordance with the assembly position within the housing 10 of the main breaker 2. That is, it is attached to a predetermined location on the housing 10 so as to be connected to the first main unit 5a, in accordance with the position of the first main unit 5a attached to the assembled main breaker 2. At this time, the wire connection portion 54 is positioned parallel to the mounting surface of the housing 10, facing the back of the main breaker 2, and the incoming wire 8 is connected from the direction opposite to the connection direction of the primary side terminal 21 of the main breaker 2. When the main breaker 2 is mounted in the housing 10 of the distribution board 1, the connecting portions 52, 53 of both are connected to each other, and the lead-in wire 8 is connected to the main breaker 2.

[0032] In this way, the connection of the service line 8 to the main breaker 2 is achieved by connecting the service line 8 to the second main unit 5b attached to the housing 10 of the distribution board 1 of the main connector 5. Therefore, the connection work of the service line 8 can be performed in a large space before the main breaker 2 is assembled to the distribution board 1, making the connection work of the service line 8 easy. Furthermore, because the terminal fittings 51 and the electric wire connection part 54 are in the same direction, the electric wire that is the lead-in wire 8 that connects to the electric wire connection part 54 is arranged in the opposite direction to the direction in which it is directly connected to the main breaker 2. Therefore, the electric wire that is led in from the back of the distribution board 1 can be smoothly connected, and there is no need to route the electric wire in the narrow space next to the main breaker 2 and connect it, as in the past.

[0033] In the above embodiment, the connection between the first main unit 5a and the second main unit 5b is configured using a concave and convex portion for insertion and connection, but the connection form between the connecting portions 52 and 53 may be other forms, for example, they may be connected to each other by screwing them together as screw-fastened terminals. [Explanation of symbols]

[0034] 1 Distribution board, 2 Main breaker, 3 Branch breaker, 4 Branch connector, 4a First branch unit, 4b Second branch unit, 4c Voltage detector port, 5 Main connector, 5a First main unit, 5b Second main unit, 8 Lead-in wire, 9 Branch wiring, 10 Housing, 21 Primary side terminal, 22 Secondary side terminal, 31 Primary side terminal, 32 Secondary side terminal, 41 Terminal fittings, 42, 43 Connecting part, 44 Wire connection part, 51 Terminal fittings, 52, 53 Connecting part, 54 Wire connection part.

Claims

1. A distribution board equipped with a main breaker and multiple branch breakers, a branch connector is disposed on the secondary terminal of the branch breaker to be used when connecting the branch wiring; the branch connector includes a first branch unit having a terminal fitting connected to a secondary terminal of the branch breaker and attached to the branch breaker; a second branch unit having an electric wire connection portion to which the branch wiring is connected and attached to the housing of the distribution board; the first branching unit and the second branching unit each have a connecting portion that enables electrical connection between the terminal fitting and the electric wire connection portion, A distribution board characterized in that the connecting portion of the first branch unit attached to the branch breaker and the connecting portion of the second branch unit attached to the housing are connected to each other when the branch breaker is assembled to the distribution board, and the secondary side terminal of the branch breaker is connected to the branch wiring.

2. The distribution board according to claim 1, characterized in that the terminal fittings connected to the branch breaker of the first branch unit and the wire connection portions connected to the branch wiring of the second branch unit face in the same direction.

3. A distribution board equipped with a main breaker and multiple branch breakers, A main connector is disposed on the primary terminal of the main breaker to be used when connecting the lead-in line, The main connector includes a first main unit having a terminal fitting connected to a primary terminal of the main breaker and attached to the main breaker; a second main unit having a wire connection portion to which the lead-in line is connected and attached to the housing of the distribution board; the first main unit and the second main unit each have a connecting portion that enables electrical connection between the terminal fitting and the electric wire connection portion, A distribution board characterized in that the connecting portion of the first main unit attached to the main breaker and the connecting portion of the second main unit attached to the housing are connected to each other when the main breaker is assembled to the distribution board, and the primary side terminal of the main breaker is connected to the feeder line.

4. The distribution board according to claim 3, characterized in that the terminal fittings connected to the main breaker of the first main unit and the wire connection portion connected to the drop wire of the second main unit face in the same direction.

Images