JP2021151045A - Breaker unit and distribution board - Google Patents

Abstract

To eliminate the hassle of connecting a breaker unit to the ground.SOLUTION: In a breaker unit 1 installed in a housing of a distribution board, a circuit breaker 11 and a connection device 12 that connects a load connected to the secondary side of the breaker are unitized, and a contact portion 13 capable of connecting a ground member formed in the housing and the connecting device is provided on the back side.SELECTED DRAWING: Figure 3

Description

The present invention relates to a breaker unit in which a breaker and a connecting device are unitized, and a distribution board including the breaker unit.

As described in Patent Document 1, a breaker unit in which a breaker connected to a bus bar formed in a distribution board and a terminal block are integrated is known. A connecting device such as a terminal block formed in a breaker unit needs to be grounded, but usually, the connecting device is connected to the ground terminal block formed in the distribution board by using an electric wire and a screw.

Registered Utility Model No. 3024452

However, with such a method, it takes time and effort to connect. Further, when it is necessary to use a plurality of such breaker units, it is necessary to connect an electric wire to each breaker unit and the ground terminal block, which is more troublesome.

The inventor of this case tried to solve this problem by diligently examining this point. The problem to be solved by the present invention is to eliminate the trouble of grounding the breaker unit.

In order to solve the above problems, a breaker unit that is installed inside the housing of the distribution board, and a connection device that connects the breaker and the load connected to the secondary side of the breaker, is unitized, and the inside of the housing is on the back side. The breaker unit is provided with a contact portion that can connect the grounding member formed in the above and the connecting device.

In addition, the arrangement of the contact part can be selected, and by selecting the arrangement of the contact part, the earth bar for the circuit breaker and the earth bar for the earth leakage breaker provided in the housing which is the earth member when arranged at the mounting position. It is preferable that the configuration is such that it is possible to determine which of the above is in contact with.

Further, it is preferable that the contact portion made of the spring member can come into contact with the earth bar when it is arranged at the mounting position.

Further, the breaker is a plug-in type breaker that is plug-connected to the bus bar arranged in the housing, and when the breaker is plug-connected to the bus bar, the contact portion may be in contact with the ground member. preferable.

Further, it is preferable that the breaker unit is arranged at a mounting position in the housing to form a distribution board in which the ground member and the contact portion are in contact with each other.

In the present invention, it is possible to eliminate the trouble of grounding the connecting device of the breaker unit.

It is a perspective view of the breaker unit in an embodiment. It is a front view which shows the example which attached the breaker unit shown in FIG. 1 to a distribution board. It is a perspective view of the breaker unit arranged so that the contact part can come into contact with the earth bar for an earth leakage breaker, as seen from the rear side. It is a perspective view of the breaker unit arranged so that the contact part can come into contact with the earth bar for a circuit breaker, as seen from the rear side. It is a side view which shows the state which the breaker unit is attached to the attachment plate. However, some devices are shown in cross section. It is a perspective view which shows the relationship between the connection device and the connection device attachment part. However, it is a perspective view of the state before attaching the breaker as seen from the rear side. It is a perspective view which shows the relationship between the connection device and the connection device attachment part. However, it is a perspective view of the state before attaching the breaker as seen from the front side.

A mode for carrying out the invention is shown below. As can be seen from FIGS. 1 and 2, the breaker unit 1 of the present embodiment is mounted in the housing 81 of the distribution board 8. The breaker unit 1 is a unitized connection device 12 for connecting the breaker 11 and the load connected to the secondary side of the breaker 11. Further, a contact portion 13 to which the ground member 82 and the connecting device 12 can be connected is provided on the back surface side. By arranging the breaker unit 1 at the mounting position in the housing 81, the ground member 82 and the contact portion 13 can come into contact with each other. Therefore, it is possible to eliminate the trouble of connecting the breaker unit 1 to the ground.

Here, the distribution board 8 in the embodiment will be described. The distribution board 8 of the example shown in FIG. 2 includes a breaker unit 1, a main breaker 84, a branch breaker 85, and the like inside the housing 81. The branch breaker 85 used in this example is a plug-in terminal provided with a plug terminal, and can be connected by inserting it into the bus bar 83. Normally, the branch breaker 85 is attached to the mounting plate 86. A ground member 82, which is a ground bar, is arranged on the lower side and the back side of the mounting plate 86. The earth bar is divided into an earth leakage breaker and a circuit breaker.

The breaker unit 1 of the embodiment includes either an earth bar 82a for a circuit breaker or an earth bar 82b for an earth leakage breaker in which a contact portion 13 which is a connection portion with the earth member 82 in the housing 81 is provided in the housing 81. Can be contacted. Further, in the breaker unit 1 of the embodiment, the contact portion 13 can be attached or detached at a plurality of places, and the arrangement can be selected.

For example, when the contact portion 13 is arranged as shown in FIG. 3, when the breaker unit 1 is attached to the distribution board 8 shown in FIG. 2, the contact portion 13 comes into contact with the earth bar 82b for the earth leakage breaker, and the circuit It can be prevented from coming into contact with the earth bar 82a for the breaker. Further, when the contact portion 13 is arranged as shown in FIG. 4, when the breaker unit 1 is attached to the distribution board 8 shown in FIG. 2, the contact portion 13 comes into contact with the earth bar 82a for the circuit breaker and causes an electric leakage. It can be prevented from coming into contact with the earth bar 82b for the breaker. In the case of the example shown in FIG. 2, as shown in FIG. 5, the contact portion 13 comes into contact with the earth bar 82b for the earth leakage breaker.

In this way, by selecting the arrangement of the contact portion 13, it is determined whether to contact the earth bar 82a for the circuit breaker or the earth bar 82b for the earth leakage breaker provided in the housing 81 when the contact portion 13 is arranged at the mounting position. If the configuration is such that it is possible, the contact portion 13 and the earth bar can be connected according to the type of the breaker 11.

The contact portion 13 that contacts the earth bar 82a for the circuit breaker and the contact portion 13 that contacts the earth bar 82b for the earth leakage breaker are provided, and one of the contact portions 13 is electrically connected to the connecting device 12. Even if this is not done, the selectivity of the earth bar 82a for the circuit breaker and the earth bar 82b for the earth leakage breaker can be ensured.

Further, the breaker unit 1 of the embodiment has a configuration in which the contact portion 13 made of a spring member can come into contact with the earth bar when the breaker unit 1 is arranged at the mounting position. In this way, since the spring member can be elastically deformed and brought into contact with the earth bar or the like, the connection between the contact portion 13 and the earth bar or the like can be maintained without using screws or the like.

By the way, in the breaker unit 1 mounted inside the distribution board 8, the breaker 11 and the connecting device 12 are unitized, but the connecting device 12 is preferably an outlet, a terminal block, or the like. The distribution board 8 provided with such a connection device 12 is typically a so-called temporary board used at a construction site or the like, and is like an outlet assuming that it is used in a place where there is no outlet. The connection device 12 is provided inside the distribution board 8. The breaker 11 used in the breaker unit 1 is preferably a plug-in type breaker 11, but it does not necessarily have to be in such a form. Further, for the sake of simplification of the description, an example in which the connecting device 12 is an outlet and an example in which the breaker 11 is a plug-in type breaker 11 will be mainly described below.

The breaker unit 1 of the embodiment includes a covering cover portion 60 above the connecting device 12 and adjacent to the breaker 11, and when the breaker 11 is connected to the bus bar 83, a part of the bus bar 83 is covered. The structure is such that the portion 60 can be covered. Therefore, the end portion of the bus bar 83 that is exposed at the same time as the connection of the breaker unit 11 can be easily covered even in the portion other than the portion covered by the breaker 11 provided in the breaker unit 1.

The covering cover portion 60 provided in the breaker unit 1 of the example shown in FIGS. 1 and 3 is configured to include an upper surface portion 61, a front surface portion 62, a lower surface portion 63, and a side surface portion 64 at positions adjacent to the breaker 11. Has been done. The covering cover portion 60 in the embodiment is configured to have an outer shape similar to that of the breaker 11 when viewed from the front, so as to suppress a sense of discomfort, but it is not necessary to be limited to such a form. The combined width of the breaker 11 and the covering cover portion 60 is preferably equal to or greater than the width of the connecting device 12 such as an outlet.

In the breaker unit 1 shown in FIG. 1, a base portion 50 and a covering cover portion 60 composed of a breaker mounting portion 51 for mounting the breaker 11 and a connecting device mounting portion 52 for mounting the connecting device 12 are integrally configured. Has been done. The cover cover portion 60 is configured to project toward the front side of the base portion 50. These are not intended to be a path for passing electricity, but are molded using a resin. Therefore, the workability at the time of assembling the breaker unit 1 can be improved. In the embodiment, the back side of the breaker mounting portion 51 is provided with a guide portion used as a guide or the like when mounting the breaker on the mounting plate 86.

By the way, the connecting device 12 of the embodiment attaches the connecting device 12 to the connecting device mounting portion 52 for attaching the connecting device 12. By performing this attachment work, the connecting device 12 is connected to the earth bar, which is the earth member 82, via the contact portion 13 and the like. In the examples shown in FIGS. 1 to 4, when the breaker 11 is plug-connected to the bus bar 83, the contact portion 13 can come into contact with the ground member 82. Therefore, the contact portion 13 can be connected to the ground member 82 only by performing the basic operation of plug-connecting the breaker 11 to the bus bar 83.

As can be understood from FIG. 6, the contact portion 13 of the embodiment is a bent conductive plate, and a ground terminal portion (not shown) formed in the contact portion 13 and the connecting device 12 itself. Is connected to by wiring 91. Therefore, as can be understood from FIG. 7, in the embodiment, the connecting device mounting portion 52 is provided with a wiring space for the wiring 91 for connecting the contact portion 13 which is the connecting portion and the connecting device 12. It is configured to have a recess 53 that can be formed. With such a configuration, a space for wiring can be secured, and wiring for connecting the contact portion 13 and the connecting device 12 becomes easy. In the embodiment, the connecting device mounting portion 52 is formed thicker than the breaker mounting portion 51 so that the recess 53 can be easily formed on the front side. If the recess 53 is made large, it is possible to secure the wiring space of the electric wire 91 required when switching the contact destination of the contact portion 13 between the earth leakage breaker and the circuit breaker.

In the embodiment, the recess 53 is configured to be covered with the connecting device 12, and the contact portion 13 can be projected from the plurality of passage holes 54 provided in the recess 53 toward the back surface side of the connecting device mounting portion 52. Further, while the portion where the wiring 91 and the contact portion 13 are connected is arranged on the recess 53 side, only a part of the contact portion 13 is configured to protrude to the back surface side of the connecting device mounting portion 52. The 91 is not exposed. The passage hole portion 54 is provided with a frame-shaped partition wall portion 55, and when the contact portion 13 made of a spring member comes into contact with the earth bar 82a or the earth bar 82b as shown in FIG. 5, the contact portion 13 is elastically formed. It is formed so as to cover the partition wall portion 55, and can prevent an electric wire or the like from touching the contact portion 13.

By the way, as shown in FIG. 1, the breaker unit 1 is provided with a leaf spring portion 71 used when fixing the breaker 11 to the breaker mounting portion 51. The leaf spring portion 71 is locked and fixed in the locking hole 11a formed in the breaker 11. If the breaker 11 is to be removed from the breaker mounting portion 51, the leaf spring portion 71 may be operated. In the embodiment, the operation piece 72 capable of operating the leaf spring portion 71 is projected to the front side so that the operation piece 72 can be operated from the front side. This is to make it easy to operate the operation piece 72 with the breaker 11 attached. In the embodiment, the operation piece 72 is located in the space between the breaker 11 and the connecting device 12, and the space provided for the wiring 92 for connecting the breaker 11 and the connecting device 12 is effectively used. The operation piece 72 may be projected so as to be operable from at least one front side of the breaker mounting portion 51 or the connecting device mounting portion 52, but in the example shown in FIG. 2, the operation piece 72 is operated from the front side of the connecting device mounting portion 52. It is projected as much as possible.

By the way, in the breaker unit 1 of the form shown in FIG. 1, the breaker unit 1 is screw-fixed to the mounting rail 86a on the housing 81 side by using the unit fixing portion 73. As can be understood from the examples shown in FIGS. 1 and 2, the breaker 11 is arranged at the corner of the breaker unit 1 having a rectangular shape in the front view, and is shifted to the diagonal side in the front view, that is, left and right and up and down. The unit fixing portion 73 is arranged. This is because the line connecting the unit fixing portion 73 and the portion where the breaker 11 is plugged to the bus bar 83 is configured to pass through the central portion of the breaker unit 1 in front view. In this way, if the line connecting the fixed portion of the breaker unit 1 and the portion where the breaker 11 plugs into the bus bar 83 passes through the central portion of the breaker unit 1 in front view, the breaker unit 1 becomes It can be firmly fixed so as to suppress rattling. With such a configuration, even if only one screw is used, it can be firmly fixed.

Although the present invention has been described above by taking the embodiment as an example, the present invention is not limited to the above embodiment and can be in various modes. For example, the breaker may not be connected to the bus bar by a plug-in, or the wiring provided on the primary side of the breaker may be connected to the breaker by screw fixing.

1 Breaker unit 8 Distribution board 11 Breaker 12 Connection device 13 Contact part 81 Housing 82 Earth member 82a Earth bar for circuit breaker (earth member)
82b Earth bar for earth leakage breaker (earth member)
83 bus bar

Claims (5)

A breaker unit that can be installed inside the distribution board housing.
The connection device that connects the breaker and the load connected to the secondary side of the breaker is unitized.
A breaker unit equipped with a contact portion on the back side that can connect the ground member formed in the housing and the connecting device. The contact part can be arranged and selected.
By selecting the arrangement of the contact portion, it is possible to determine whether to contact the earth bar for the circuit breaker or the earth bar for the earth leakage breaker provided in the housing which is the earth member when the contact portion is arranged at the mounting position. Item 1. The breaker unit according to item 1. The breaker unit according to claim 2, wherein the contact portion made of a spring member can come into contact with the earth bar when the breaker unit is arranged at the mounting position. The breaker is a plug-in type breaker that plugs into the bus bar located inside the housing.
The breaker unit according to any one of claims 1 to 3, wherein the contact portion can come into contact with the ground member when the breaker is plugged into the bus bar. A distribution board in which the ground member and the contact portion are brought into contact with each other by arranging the breaker unit according to any one of claims 1 to 4 at a mounting position in the housing.

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