JP5692744B2 - Residential distribution board - Google Patents

Description

The present invention relates to a distribution board in which an internal device such as a switch is incorporated in a cabinet, and more particularly to a distribution board having an insole to which a branch switch having a CT output signal lead line is attached as an internal device.

Generally, a distribution board is a box that forms a cabinet that forms the outer shell of a distribution board by attaching internal devices such as a main switch, branch switch, and earth leakage breaker to the bottom of the board. It is mounted and fixed to. As shown in FIG. 12 (FIG. 3 in Patent Document 1), a plurality of branch switches are attached to a substrate 21 corresponding to the insole, and are fixedly attached to a box (not shown) as an integral unit.

A load-side electric wire is connected to the load-side terminal of the branch breaker toward the branch circuit. An opening for drawing the load side electric wire out of the box is provided on the back side of the box, etc., and the opening is aligned with the position of the electric wire inlet that is constructed on the wall surface and attached to the wall surface etc. Thus, the load-side electric wire is drawn from the box into the wall or the like and wired, and power is supplied to the branch circuit.

The wiring mode of the load side electric wires in the box is, as a first wiring mode, a wall surface at a position corresponding to the load side terminal portion of each of the branch switches arranged facing the distribution bar 4 as a boundary. In some cases, an electric wire is curved from the load-side terminal portion toward the opening portion of the wall surface and wired substantially vertically on the wall surface. As the second wiring mode, depending on the construction state, such as when the wire inlet in the wall surface etc. is opened small or when it is opened at a location shifted from the back side of the load side terminal part of the branch switch, A side electric wire may be introduced into the box from the opening and routed through the back side of the insole to the load side terminal in each branch switch and then wired.

In recent years, distribution boards have become more sophisticated, measuring the power consumed by home appliances connected to branch switches and the power generated from auxiliary power sources such as photovoltaic power generation, etc. Patent Document 2 discloses a distribution board with a measurement function that can surely grasp the usage status of the device.

This distribution board with measurement function consists of a main current transformer that detects the current flowing through the load side circuit of the main switch, a branch current transformer that detects the current flowing through the load side circuit of the branch switch, and the auxiliary breaker. Auxiliary current transformer that detects the current flowing through the load side circuit, each current detected by the main current transformer, branch current transformer and auxiliary current transformer, and the voltage of the main circuit, through the main circuit Measuring means for measuring bidirectional power to be bought and sold, each power consumed by each branch circuit, and generated power of the auxiliary power supplied via the auxiliary power supply circuit, the main switch, A branch switch or the like is attached to the insole and fixed to the box.

In this distribution board with measurement function, each branch breaker has a built-in branch current transformer, so that the current flowing through the branch circuit can be detected by the branch current transformer. The power consumption of the circuit can be measured.

As shown in the connection diagram inside the distribution board of FIG. 3 in Patent Document 2, the wiring between the branch current transformer and the measuring means is connected to a lead wire 77 that is a detection signal line of the branch current transformer 75 and each of the wirings. Wiring can be performed in an orderly manner by connecting the harness wires 79 to each other using the harness 78. Usually, when such a lead wire 77 and each harness wire 79 are connected using the harness 78, the back side of the insole on which the branch breaker is placed (the back side of the substrate 21 in FIG. 3 of Patent Document 1). ) Using a space between the box and the insole.

JP 2003-289604 A JP 2001-103621 A

Thus, in the distribution board in which the branch current transformer is built in each branch breaker, the current flowing through the branch circuit can be detected by each branch current transformer, and the branch current transformer 75 is also provided. By connecting the lead wire 77, which is the detection signal line, and each harness wire 79 using the harness 78, wiring between the lead wire / harness wire and the measuring means can be performed in an orderly and simple manner.

On the other hand, since these lead wires / harness wires / harnesses are arranged in the space between the box and the insole on the back side of the insole, the wiring mode of the load side electric wires in the box is the first wiring. In the case of the aspect, particularly, the aspect as shown in the second wiring aspect, the gutter space in the box is reduced, and when wiring the load side electric wire, the lead wire / harness wire / harness May interfere with wiring. When the number of branch circuits is large, the number of lead wires / harness wires / harnesses also increases, and the obstruction of wiring becomes even more remarkable.

Generally, the load-side wire is thicker than the lead wire / harness wire / harness, and it is difficult to bend the wire, so avoid the lead wire / harness wire / harness on the back of the insole. However, it is difficult to perform the wiring work of the load-side electric wire, which increases the man-hours for wiring work and lowers the work efficiency. .

Also, if it is necessary to replace the branch breaker on the distribution board once wired, select the load side wires, lead wires and harnesses arranged in parallel, and load the branch breaker to be replaced. It is necessary to remove the corresponding branch breaker from the distribution board after selecting the side wires and lead wires. In addition, after installing a new branch breaker to the distribution board, it is necessary to connect the removed load-side wires, lead wires, and harness to their original positions. When force is applied and stress is applied, there is a possibility that a defect may occur in wiring connection.

Thus, as the functionality of distribution boards increases, wiring space for connecting internal devices and additional device placement space for placing new devices as functions are added are required. However, in order to secure these wiring space and additional equipment placement space, the gutter space in the box is compressed, which may hinder the wiring of the original load side wire, or the CT output signal lead wire may be connected to the load side connecting wire or There arises a problem that there is a risk of contact with wires of other circuits.

Therefore, the present invention has been made in view of the above problems,
Attach a branch switch with a CT output signal lead wire to the bottom of the distribution board, and when performing wiring work, make sure that the CT output signal lead wire touches the load-side connecting wire and other circuit wires. Provided is a distribution board which can be provided with a space for disposing a connecting member that can be connected to the CT output signal lead-out line and guides the CT output signal to the measuring means without pressing the gutter space in the box. The purpose is to do.

The distribution board according to the present invention is configured to solve the above-described problem, and includes a current transformer (CT) in which a main circuit conductive portion connecting between a power supply side terminal and a load side terminal is inserted. An internal device of a distribution board provided inside the body and provided such that a CT output signal lead line for leading out the CT output signal to the outside of the body is led out from the load side terminal side of the body to the outside of the body A distribution board comprising an insole that is fixed to a box by attaching a branch switch as a circuit breaker as a box, wherein the side of the insole to which the branch switch is attached is a front side. When the side facing the rear side is the back side, the insole is composed of a lower plate part attached to the box and an upper plate part mounted on the lower plate part and attached to an internal device, and the lower plate part Component placement space for placing components between the The component placement space is provided with a connection part connected to a connection connector provided at the end of the CT output signal lead-out line, and individual branch opening / closing in the upper plate part for each vessel mounting portion, the the front side, an opening of the insertion portion of the connector leading to the component placement space, the connecting portion is constituted by exposed so as not protrude to the front side from the opening It may be configured as a feature.

According to such a configuration, the CT output signal lead line in the branch switch can be wired while avoiding the gutter space around which the load side electric wire is routed. In particular, the CT output signal lead-out line can be wired without hindering the load-side electric wire passing through the back surface of the inner bottom, and improvement in wiring work efficiency can be expected.

Delete

In addition, according to such a configuration, it is possible to secure the wiring space and the additional device arrangement space without reducing the gutter space at the peripheral portion of the box and the back portion of the middle bottom, and it is an obstacle when installing the branch switch. In addition, the wiring space and the additional device arrangement space can be secured. Moreover, as a hierarchical structure, by making a double structure between the lower plate portion and the upper plate portion, the strength of the insole structure can be improved. That is, when a switch or the like is placed on the insole, deformation such as bending of the insole can be prevented, and as a result, the reliability of electrical connection between the bus bar and the switch can be improved.

Moreover, the said component arrangement | positioning space can employ | adopt the structure which can provide an opening part in both ends in the direction which arranges the said branch switch side by side, and can arrange | position components in the said component arrangement space from the outside.

According to such a configuration, it is convenient to arrange additional devices, components, and power lines and signal lines for connecting internal devices across the branch switch arrangement direction. In addition, when performing primary feed wiring toward an internal device located at the end of the box away from the main switch, the wire passes from one opening to the other opening in the component placement space. By making it, interference with the load side electric wire connected to the load side terminal of a branch switch can be prevented.

The component arrangement space includes a state in which a part of the internal device mounting portion in the upper plate portion is provided to be opened and closed by an opening / closing means so that the space is exposed from the front side and a state hidden from the front side. The structure which can be taken selectively can be employ | adopted.

According to such a configuration, it is possible to access the component arrangement space from the front side without having to remove the insole, arrangement of additional devices, arrangement of components to be stored, removal, maintenance, and connection between internal devices. Wiring can be performed, removed, and maintained efficiently.

Further, it is possible to adopt a configuration in which a wiring groove portion for guiding a CT output signal lead line from the branch switch to the opening is formed on the front side of the upper plate portion.

According to such a configuration, when the branch switch is attached to the insole, the CT output signal lead line can be easily guided to the opening, and the CT output signal lead line is press-contacted on the rear side of the branch switch. There is nothing to do. Further, since the CT output signal lead-out line is wired on the back side of the branch switch, the CT output signal lead-out line does not protrude in the juxtaposition direction when the branch switch is juxtaposed. The load side electric wire in the switch and the CT output signal lead-out line in another branch switch are not mixed. In this way, it is possible to provide a distribution board that is unlikely to hinder work when connecting / separating wiring, such as during construction of a distribution board, and that can improve wiring workability.

As described above, according to the present invention, when the branch switch having the CT output signal lead wire is attached to the middle bottom of the distribution board and wiring is performed, the CT output signal lead wire is connected to the load side connecting wire or In order to arrange a connecting member that can prevent contact with wires of other circuits and that is connected to the CT output signal lead-out line and guides the CT output signal to the measuring means without compressing the gutter space in the box. It is possible to provide a distribution board that can be provided with a large space.

The external appearance block diagram of the distribution board which shows 1st embodiment of this invention is shown. The external appearance block diagram of the insole in 1st embodiment is shown. An exploded view of the insole is shown. The exploded view of an upper board part is shown. An exploded view of the insole is shown. The principal part sectional drawing of an insole is shown. The external appearance block diagram of the insole in 2nd embodiment of this invention is shown. The external appearance block diagram of the branch switch in 1st embodiment of this invention is shown. The hooked part of a branch switch is shown. The figure before attaching a branch switch to the insole is shown. The figure after attaching the branch switch to the insole is shown. The insole in a prior art example is shown.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
First, the external configuration of the distribution board according to the present embodiment will be described with reference to FIG. A distribution board 1 according to the present embodiment includes a box 2 whose front side is opened to accommodate internal devices for distribution, and a front cover (see FIG. A plurality of branch switches connected to the main switch 4 or the main switch 4 via the connection conductor 9 and the bus 10 in the box 2. 7 and the like are arranged, and the load-side electric wires drawn into the box 2 from the wall surface through the openings 8 formed at appropriate positions on the back side of the box 2 are connected to the respective branch switches 7. The inner peripheral edge of the box 2 and the back side of the midsole 11 are provided with a gutter space for wires drawn into the distribution board.

Internal devices such as the branch switch 7 are attached and fixed to the box 2 while being attached to the insole 11. In the present embodiment, the side of the insole 11 where the internal device is attached is the front side, and the side attached to the box (the side facing the box) is the back side.

Next, the external configuration of the insole 11 will be described with reference to FIGS. 2, 3, and 4. The insole 11 includes a lower plate portion 111 attached to the box 2 and an upper plate portion 112 that is placed on the lower plate portion 111 and attaches an internal device. The lower plate portion 111 is made of a metal plate, and the upper plate portion 112 is made of resin molding. The attachment of the lower plate portion 111 and the upper plate portion 112 is performed by fitting the attachment claw pieces 1123 provided at the positions corresponding to the holes to the attachment holes 1111 provided in the lower plate portion 111. It is a structure that is performed by.

By attaching the upper plate portion 112 to the lower plate portion 111, the insole 11 can be configured as a hierarchical structure. The lower plate portion 111 is formed by bending a metal plate and maintains a predetermined strength. However, by forming a double structure between the lower plate portion 111 and the upper plate portion 112, an insole structure is provided. As a result, it is possible to further improve the strength and prevent deformation such as bending of the insole when a switch or the like is placed on the insole. By preventing the bending of the insole, it is possible to reduce unnecessary stress from being applied to internal devices such as busbars and switches, and electrical connections between busbars and switches, etc., resulting in mechanical deformation and damage. In addition, the reliability of electrical connection can be improved.

In the figure, as an example of the upper plate portion 112, an upper plate portion on which a branch switch to which electric power is supplied from the bus bar 10 can be placed for eight circuits on one side and a total of 16 circuits with the bus bar 10 as a boundary. Show. The upper plate part 112 is provided with a bus bar mounting part 1121 for mounting the bus bar 10 of each pole so as to cross a substantially central part, and a branch switch mounting part for mounting a branch switch in a direction orthogonal to the transverse direction. 1122 are provided respectively.

The branch switch 7 is provided on both sides with a portion serving as a trunk of the bus, and a plurality of branch switches are arranged in parallel in the extending direction of the bus 10 on each side. In FIG. 2, the near side is the L1 voltage electrode and the far side is the L2 voltage electrode with respect to the direction in which the trunk portion extends. Each bus line is integrally provided with a branch line for supplying power to the branch switch 7 for each branch circuit.

The bus bar mounting part 1121 is provided with a protruding part 1121a so that the neutral pole bus bar 101 is located on the most front side with reference to the height of the branch switch mounting part 1122 in the front side-back side direction. On the other hand, a recess 1121b is provided so that the bus bars (buses L1 and L2) 103 and 102 of the two voltage electrodes are positioned on the back side with respect to the height of the branch switch mounting portion 1121.

Since the trunk of the neutral electrode bus 101 is located on the foremost side, an electric shock accident caused by inadvertently contacting the bus when checking the distribution board can be prevented as much as possible.

In addition, the amount of recess of the recess 1121b is such that when the bus bars 102 and 103 are attached to the recess, the height of the front side of the buses 102 and 103 is higher than the height of the branch switch attaching part 1121. It is provided so as to be on the back side by several mm. Thereby, when the branch switch 7 is attached to the branch switch mounting portion 1122, the back side of the power supply side portion of the branch switch 7 is located on the front side of the buses 102 and 103. It can be attached and fixed to the upper plate portion 112 in a state where an insulation distance from the bus bar is secured.

Now, in the branch switch attachment part 1122, the partition part 1122a is provided for every circuit. The internal dimension of the partition 1122a is set to be approximately equal to the width of the branch switch 7 in the parallel direction, and the branch switch can be accommodated inside the partitions. Further, the partition 1122a is used as a guide for sliding the branch switch 7 in the direction of the branch line when connecting the branch switch 7 to the branch line of the bus 10, and in the direction in which the branch switches are installed side by side. Used as a backlash prevention unit.

In the branch switch 7 as the internal device, a current transformer (CT) in which a main circuit conductive portion connecting between a power supply side terminal and a load side terminal is provided is disposed inside the container body, and the CT This is a branch switch provided so that a CT output signal lead-out line for leading out the output signal from the load body terminal side is led out from the load side terminal side of the container body. The branch switch 7 is formed by casings 701 and 702 whose body is divided in the longitudinal direction. At each end in the longitudinal direction of the vessel body, there are provided a power supply side terminal connected to the power supply and a load side terminal for supplying power to the load side circuit.

The main body of the branch switch 7 is in contact / separated with the main circuit conductive portion connected to the power supply side terminal and the load side terminal, and the contact provided in the main circuit conductive portion interposed in the main circuit conductive portion. Contact opening / closing mechanism, an automatic shut-off mechanism that operates the contact opening / closing mechanism to cut the circuit when an abnormal current flows through the main circuit conductive portion, a current transformer (CT) through which the main circuit conductor portion is inserted, etc. Is provided. In the CT, an induced current is generated in accordance with the magnitude of the current flowing in the main circuit conductor portion inserted in the CT. In order to transmit this induced current to the outside as an output signal of the CT, the CT output A CT output signal lead line 710 connected to the end is connected. The CT output signal lead line 710 extends to the outside of the container. In addition, a connection connector 711 for connecting to an external electric wire is provided at the end of the CT output signal lead-out line 710. An operation handle 703 for turning on and off the contact opening / closing mechanism from the outside of the casing is provided on the front side of the casing.

Reference numerals 705 and 706 denote electric wire insertion holes for inserting and connecting load side electric wires reaching the load side circuit to the load side terminals. The power supply side terminal is configured by using a plug-in type terminal, and the load side terminal is configured by using a lock connection terminal.

The direction in which the devices of the branch switch are arranged side by side is the side surface, and among the devices of the branch switch, the side on which the operation handle 703 for operating the branch switch is provided is the front side, and the branch switch The side attached to the mounting plate for mounting and fixing is defined as the back side. The front side / back side direction coincides with the front side / back side direction of the midsole.

A branch switch hooking portion 1122b for mounting and fixing the branch switch 7 for each circuit is provided at the end of the branch switch mounting portion 1122 opposite to the bus side. The branch switch hooking portion 1122b is hooked on a hooked portion 708 provided in a recess 707 provided on the back side of the branch switch 7, and restricts the movement in the front direction after mounting.

Specifically, a hook piece extending in a direction away from the bus bar is formed in the branch switch hooking portion 1122b, and the recess 707 on the back side of the branch switch 7 is supplied with power from the load side of the branch switch. A hooked portion 708 is formed which extends to the side and is formed with the height of the front side and the back side so as to be hooked with the hook piece.

An end portion of a side parallel to a direction in which the trunk of the bus bar 10 extends in the lower plate portion 111 is formed by being bent into a substantially L shape. This is for maintaining the strength of the lower plate portion 111 and for restricting the movement of the branch switch from the power supply side to the load side when the branch switch 7 is connected to the branch line of the bus. . That is, the load-side terminal portion of the branch switch 7 is provided with a lock lever 7041 that protrudes from the back side of the branch switch 7 and selectively selects whether or not by an external knob. The lock piece 7042 protruding from the rear side engages with the surface of the bent portion that faces the generatrix side, thereby restricting the movement of the branch switch from the power source side to the load side. For this reason, it is possible to prevent the branch switch 7 from being detached from the branch line due to vibration or the like, and it is possible to ensure attachment and fixing to the upper plate portion 112 of the branch switch.

When the branch switch 7 is mounted, the branch switch 7 is placed on the branch switch mounting portion 1122 and the branch switch 7 is slid in the direction of the branch line. The branch switch hooking portion 1122b is fitted into the recessed portion 707, and is further slid, so that the hooked portion 708 on the branch switch side and the branch switch hooking portion 1122b are fitted, and the front side-back side movement is restricted Is done. At this time, the branch line in the bus 10 and the power terminal on the power source side in the branch switch 7 are connected, and electrical connection is also performed.

Then, by pushing down the external knob of the lock lever 7041 in the direction of the lower plate portion 111, the lock piece 7042 protrudes from the back surface of the branch switch 7 and is fitted to the bent portion 1112 of the lower plate portion 111. Is completed.

When the branch switch 7 is removed from the upper plate portion 112, the external knob of the lock lever 7041 is pulled up in the direction opposite to the lower plate portion 111 (the front side of the branch switch), and the lock piece 7042 is removed from the rear surface. By moving the branch switch 7 so as not to project and pulling it away from the bus, the branch switch hooking portion 1122b and the hooked portion 708 are disengaged at the same time as the bus 10 and the branch switch. 7 is disconnected from the power source side terminal 7 and the removal is completed.

Further, the insole 11 is configured to be able to cope with changes in the number of branch circuits by changing the lengths of the lower plate portion 111, the upper plate portion 112, and the bus bar 10. As shown in FIG. 5, the upper plate portion 112 includes end parts 112a and 112d, and parts 112b, 112c, L1 and L2, and a neutral electrode for mounting a branch switch sandwiched between the end parts. Are divided into parts 112e and 112f as insulating walls to insulate the buses from each other, and the parts on which branch switches for every 8 circuits in total are placed in the direction in which the trunks of the busbars extend are connected. Respond to changes in the number of branch circuits by increasing or decreasing.

In addition, the lower plate portion 111 is not divided, and the length of the lower plate portion 111 is changed every four circuits in the direction in which the trunk of the bus bar extends, in the same manner as the increase / decrease unit of the upper plate portion. The structure is formed.

Now, as shown in FIG. 6 (a) AA sectional view and BB sectional view, on the back side of the branch switch mounting portion 1122 of the upper plate portion 112, on the front side of the lower plate portion 111. Is formed with a cavity as the component placement space 5. The height of the hollow portion from the front side to the back side is substantially equal to the amount of depression of the depression 1121b in the upper plate portion 112.

Moreover, as shown in the BB cross-sectional view, the size of one component arrangement space 5 is the size of every four circuits in the direction in which the trunk of the bus bar extends. This depends on the fact that the parts forming the upper plate part 112, that is, the parts 112b and 112c on which the branch switch is placed, are divided into four circuits. In addition, a partition wall 1124 is formed on the back side of these components 112 b and 112 c, and the component placement space 5 is divided on the back side of the branch switch mounting portion 1122 by the partition wall 1124.

It is assumed that the partition wall 1124 hinders the arrangement depending on the size of the parts arranged in the distribution board. For this reason, a notch 1124a is formed in a part of the partition wall 1124, and parts extending over the entire direction in which the trunk of the bus bar of the upper plate 112 extends can be arranged through the notch 1124a. It is configured as follows. As a result, the component placement space 5 has openings 1128 at both ends, and from the outside, the components can be placed in the component placement space through the openings 1128. Convenience increases.

In addition, on the front side of the branch switch attachment portion 1122 in the upper plate portion 112, an opening 1125 as an insertion portion of the connection connector 711 leading to the component placement space is provided for each attachment portion of the branch switch. Provided. In addition, the branch switch mounting portion 1122 has a common board over the branch switch mounting portion 1122 on one side so that the connection portion 2022 for connecting the connection connector 711 of the CT output signal lead wire can be disposed. In 2021, the connection part 2022 is placed side by side for each attachment part of the branch switch.

From each connection portion, signal lines are wired to aggregation connector portions 2024 and 2014 provided at end portions of the substrate. Connected to the aggregation connector is a harness line from a measuring means for measuring power consumption consumed in each branch circuit based on each current detected by the CT and the voltage of the main circuit.

Further, the connecting portions 2022,2012 are provided is exposed to a height that does not protrude to the front side from the opening 112 5. This is because the branch switch 7 is placed on the branch switch mounting portion 1122.

The substrates 201 and 202 are fixed to the upper plate portion 112 with screws by passing screws through screw holes provided in the substrate on the back side of the upper plate portion.

In addition, on the front side of the upper plate portion 112, a wiring groove portion 1126 formed by denting a part of the branch switch mounting portion is provided in order to guide the CT output signal lead line 710 to the opening 1125. Yes. When the branch switch 7 is attached to the branch switch attachment portion 1122, the CT output signal lead line is provided in the wiring groove portion 1126, so that the attachment of the branch switch 7 is not hindered.

When mounting the breaker switch 7, through the previously connected connector 711 from the opening 112 5 to component placement space, after connecting to the connecting portion 2022 exposed from the front side, CT output signal lead lines 710 to the wiring groove 1126 After being arranged so as to be positioned, the branch switch 7 is mounted on the branch switch mounting portion 1122 and mounted so as to slide toward the branch line. At this time, when the branch switch is arranged in parallel by wiring the CT output signal lead line 710 along the stepped portion 7021 in the casing of the branch switch 7, the CT output signal is output to the adjacent branch switch. Convenient because there are no lead wires.

When removing the branch switch 7, the branch switch is slid away from the branch line, once disconnected from the branch line, and then the connection connector 711 is removed from the connection portion 2022.

The CT output signal lead-out line 710 is disposed in the wiring groove portion 1126 when the branch switch 7 is attached to the branch switch attachment portion 1124, and the connection connector 711 is a component arrangement on the back side of the branch switch. Since it is connected to the connecting portion 2022 provided in the space 5, it is possible to prevent the CT output signal lead wire from coming into contact with the load-side connecting wire and the wires of other circuits. In addition, the wiring of the CT output signal lead-out line does not affect the gutter space on the back side of the insole, so that it is possible to perform the wiring of the load-side electric wire without pressing the gutter space in the box.

In this way, a space for arranging the substrate, which is a connecting member to the measuring means, can be secured inside the insole across the direction in which the branch switches are arranged side by side. Since openings 1128 are provided at both ends of the component placement space 5, it can be used as a wiring place for the substrate and the primary feed wiring, and a power supply line and a signal line for connecting additional components and internal devices are arranged. Convenience is improved.

When primary feed wiring is performed toward an internal device disposed at the end of the box away from the main switch, the other through the notch 1124a in the partition wall 1124 from one opening 1128 of the component placement space 5 By passing the electric wire toward the opening 1128, the wiring of the primary feed can be made without interfering with the load-side electric wire connected to the load-side terminal of the branch switch 7 constructed on the back side of the insole 11. Can be constructed.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. The distribution board 1 according to the present embodiment selectively selects a state in which the component placement space 5 in the insole 11 according to the first embodiment is exposed to the front side and a state of being hidden from the front side. This is a possible configuration.

That is, in the first embodiment, the branch switch mounting portion 1122 of the upper plate portion 112 is formed to be opened and closed by the opening / closing means provided in the vicinity of the recessed portion 1121b, and the component placement space 5 is provided to be exposed. is there.

The opening / closing means is configured by providing a fitting portion 1127 for fitting the recess 1121b and the branch switch mounting portion 1122 to each other, and the branch switch mounting portion 1122 is a portion that becomes a trunk of the bus bar 10. Is provided so as to rotate about the extending direction of the shaft. As described above, the upper plate portion 112 is formed by the parts 112e and 112f on which the branch switches for every eight circuits are placed in the direction in which the trunk of the busbar extends, and for each of these parts. It can be opened and closed.

When opening and closing, the part switch space can be exposed by flipping up the branch switch hooking part 1122b with a finger or the like, and the branch switch hooking part 1122b is pushed down with a finger or the like. Thus, the component placement space can be concealed. FIG. 7A shows a state in which the component placement space is slightly opened, and FIG. 7B shows a state in which the component placement space is greatly opened.

In addition, since the entire part placement space 5 in the insole 11 is provided so as to be exposed to the outside by similarly configuring so that the branch switch in the part 112a at the end portion can be freely opened and closed, the part placement space is provided. Can be accessed from the front side, the arrangement of additional equipment, the arrangement of parts to be stored, removal, maintenance, and the construction, removal and maintenance of wiring for connecting internal equipment to each other. The components can be arranged with good workability without looking into the opening 1128 or removing the upper plate portion 112 from the lower plate portion 111 at the time of arrangement.

In addition, in this embodiment, although the branch switch attachment part 1122 shows the example which does not remove | deviate from the upper board part 112 with opening operation of the components arrangement | positioning space 5, as an other form, an upper board is shown. The busbar mounting portion 1121 and the branch switch mounting portion 1122 in the portion 112 are formed of separate parts, and the branch switch mounting portion 1122 is completely removed without providing the fitting portion. Also good. In this case, it can be expected that the work space for component placement is expanded and workability can be further improved by removing the branch switch attaching portion 1122.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

For example, a portion corresponding to the component placement space 5 of the lower plate portion may be formed by being recessed by metal processing, and the size of the component placement space 5 may be enlarged. In this case, the shape of the end of the recessed portion is not a step shape but an inclined surface (C surface) so as not to obstruct the wiring of the electric wire to be constructed on the back side of the lower plate portion 111. It is good to form so as not to cause interference, such as being caught.

In addition to dividing the division unit of the upper plate part by 4 circuits in the direction in which the trunk of the bus bar extends, it is provided for every 2 circuits, 8 circuits, or 1 circuit, which is required for the design of the distribution board. It may be configured to be able to closely follow the addition of the number of branch circuits.

Further, the lower plate portion 111 is configured to be divided in the same manner as the upper plate portion 112, and four circuits are provided in the direction in which the trunk of the busbar extends so as to be sandwiched between the components at both ends and the components at both ends. Alternatively, it may be formed by dividing the length into the number of other circuits and fastening them together with screws, or by forming and connecting fitting portions that fit together. Thereby, sharing of the lower board part 111 can be aimed at.

Further, instead of the fitting part 1127 in the opening / closing means, a bearing part is formed in the bus bar attaching part and the branch switch attaching part, and the shaft is passed through the bearing part, whereby the branch switch attaching part can be rotated. You may form in.

Further, with respect to the rotation direction in the opening / closing means, a shaft portion in the fitting portion 1127 is provided, a bearing portion is provided in an end portion of the branch switch mounting portion in a direction in which the branch switches are arranged in parallel, and the lower plate portion 111. The rotating shaft may be formed in the direction from the power source side to the load side of the branch switch, and the rotating direction may be different.

DESCRIPTION OF SYMBOLS 1 Distribution board 2 Box 3 Current limiter 4 Main switch 5 Parts arrangement space 7 Branch switch 8 9 Connection conductor 10 Bus 101 Neutral pole bus 102 L2 bus 103 L1 bus 11 Middle bottom 111 Lower plate part 1111 Mounting hole 1112 Bending part 112 Upper plate part 112a End part 112b Branching switch mounting part 112c Branching switch mounting part 112d End part 112e Insulating wall 112f Insulating wall 1121 Busbar mounting part 1122 Branch switch attaching portion 1122a Partition portion 1122b Branch switch hooking portion 1123 Mounting claw portion 1124 Partition wall 1124a Notch portion 1125 Opening portion 1126 as insertion portion of connection connector Wiring groove portion 1127 Fitting portion 1128 Opening portion

Claims (4)

A current transformer (CT) in which a main circuit conductive portion connecting between the power supply side terminal and the load side terminal is provided is disposed inside the body, and a CT output for extracting the output signal of the CT to the outside of the body A component comprising an insole that is fixed to the box by attaching a branch switch as an internal device of the distribution board provided so that the signal lead-out line is drawn out from the load side terminal side of the device to the outside of the device An electrical panel,
When the side that attaches the branch switch in the insole is the front side and the side facing the box is the back side,
The insole is
A lower plate portion attached to the box;
It is composed of an upper plate portion that is placed on the lower plate portion and attaches an internal device,
While being configured as a hierarchical structure with a component placement space for placing components between the lower plate portion and the upper plate portion,
The component placement space includes a connection portion connected to a connection connector provided at an end portion of the CT output signal lead line,
For each individual branch switch mounting portion of the upper plate, the front side, an opening of the insertion portion of the connector leading to the component placement space,
A distribution board characterized in that the connection portion is exposed so as not to protrude from the opening to the front side.
The component placement space is
Openings are provided on both ends in the direction in which the branch switches are juxtaposed,
2. The distribution board according to claim 1, wherein components can be arranged in the component arrangement space from the outside.
The component placement space is
By providing a part of the branch switch mounting portion in the upper plate portion so as to be freely opened and closed by an opening and closing means,
The distribution board according to claim 1 or 2, wherein a state exposed to the front side and a state hidden from the front side can be selectively taken.
4. A wiring groove for guiding a CT output signal lead-out line from the branch switch to the opening is formed on the front side of the upper plate portion. The distribution board as described in any one of them.

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