JP4405233B2 - Busbar device - Google Patents

Description

  The present invention relates to a bus device composed of a vertical bus and a horizontal bus, and more particularly to a bus device with an improved shape of an insulating plate interposed between the vertical bus and the horizontal bus.

Conventionally, for example, a bus device 100 applied to an open / close control device for a low-voltage motor in a power plant generally has an outer shape as shown in FIG. The bus device 100 includes a first vertical bus 102a, a second vertical bus 102b, and a third vertical bus 102c, as schematically shown in the unit chamber 101 formed therein. And a three-phase vertical bus 102, an R-phase horizontal bus 103a, an S-phase horizontal bus 103b, and a T-phase horizontal bus 103c electrically connected to the first to third vertical buses 102a to 102c. Phase horizontal buses 103 are respectively provided. As shown in FIG. 7, each of the vertical buses 102a to 102c is made of a copper plate that is long and has an L-shaped cross section, and each of the horizontal buses 103a to 103c is a copper plate that is a long flat plate. It is configured. As shown in FIG. 6 , a plurality of the unit chambers 101 are formed in the vertical direction in the outer box 104.

  Each of the horizontal buses 103a to 103c is supported by the outer box 104 via an insulator 105, and each of the vertical buses 102a to 102c is supported by the horizontal buses 103a to 103c and a bus bar support 106, respectively. ing. Each of the vertical buses 102a to 102c has two surfaces on the mountain side because the cross section is L-shaped as described above, and one of the two surfaces is the horizontal bus 102a to 102a. It is configured as a facing surface 102d so as to be opposed to c.

In this case, the upper ends of the opposing surfaces 102d of the vertical buses 102a to 102c are electrically connected to the horizontal buses 103a to 103c via spacers 107 (washers) as shown in FIG. ing. Further, the other one surface of the vertical buses 102a to 102c protrudes at a right angle in a direction opposite to the opposing surfaces 102d and is positioned as a contact surface 102e.
The vertical buses 102a to 102c and the horizontal buses 103a to 103c are arranged so that their positions are perpendicular to each other.

By the way, in the bus device 100 having three phases as described above, since the horizontal bus 103 is arranged in three phases in the height direction, as shown in FIG. 7 , the uppermost R-phase horizontal bus 103a In order to connect the first vertical buses 102a, the first vertical buses 102a must straddle the S-phase and T-phase horizontal buses 103b and 103c, respectively.
For this reason, at the upper end of the first vertical bus 102a, the first vertical bus 102a is not short-circuited based on contact with the S-phase and T-phase horizontal buses 103b and 103c and the mutual conduction. Two L-shaped cross-sections of the first vertical bus 102a at the portion in contact with the S-phase and T-phase horizontal buses 103b and 103c, that is, an opposing surface 102d facing the S-phase and R-phase horizontal buses 103b and 103c The insulating tube 108 is wound around the contact surface 103e protruding in the opposite direction to this surface so as to wrap them together. The same applies to the second vertical bus 102b, as shown in FIG. 7 , so as to integrally wrap the two L-shaped surfaces of the second vertical bus 102b at the portion in contact with the T-phase horizontal bus 103c. Insulating tube 108 is wound around.

  Further, an insulating plate 109 having three groove portions 109a is provided below the lower end portions of the respective insulating tubes 108 so as to wrap the first to third vertical buses 102a to 102c from the rear surface. In addition, a partition cover 110 is disposed so as to close the groove 109a of the insulating plate 109 from the front surface of the vertical buses 102a to 102c. The partition cover 110 structurally partitions the vertical buses 102a to 102c and the horizontal buses 103a to 103c and units to be described later, and has a rectangular contact on the surface thereof in three rows in the width direction. A plurality of insertion windows 110a are formed.

As shown in FIG. 6 , for example, a unit 111 that controls opening and closing of a low-voltage motor is inserted into the unit chamber 101 of the busbar device 100 configured as described above. As shown in FIG. 7 , three contacts 111 a are attached to the rear surface of the unit 111, and the three contacts 111 a pass through the contact insertion window 110 a of the partition cover 110 and the vertical contact. Power is supplied to the unit 111 by sandwiching and fitting the contact surface 102e of the bus bar 102.

  However, in the vertical bus 102 configured as described above, the insulating tube 108 is wound around the upper ends of the first vertical bus 102 and the second vertical bus 102a and 102b. Since the contact 111a of the unit 111 is caught by the insulating tube 108 and cannot be directly fitted to the contact surface 102e of the vertical bus 102, the unit 111 cannot obtain power. For this reason, the unit 111 cannot be inserted into this portion, resulting in a useless dead space, so that there is a problem that the storage space as the bus device 100 is reduced and the storage property is poor.

  This invention is made | formed in view of the said situation, The objective is to provide the bus-bar apparatus which expands a storage space and has favorable stowability.

In order to achieve the above object, the bus device of the present invention includes an outer box, first, second, and third horizontal bus bars arranged above and below the outer box, and an upper end portion on the horizontal bus bar. includes but first that will be electrically connected to a second, third vertical busbar, the busbar support for supporting the vertical bus, and disposed an insulating plate between this bus supports the vertical generatrices In the above-described busbar device, the insulating plate is extended to the front surface of the horizontal busbar to partition between the different phases of the vertical busbar and the horizontal busbar (invention of claim 1).

  According to this configuration, since there is no need to wrap the insulating tube around the horizontal bus at the upper end of the vertical bus, even if the unit is inserted into the vertical bus at this site, the contact of the unit is not connected to the vertical bus. Since electric power can be obtained based on the fact that it can be fitted to the contact surface, the storage space as a bus device is expanded as a result, and a good storage property can be obtained without creating a dead space.

Further, each of the vertical bus bars is configured in an L-shaped cross section having a facing surface facing the horizontal bus bar side, and a contact surface perpendicular to the horizontal bus bar and projecting to the side opposite to the horizontal bus bar side. The plate is formed with first, second, and third groove portions that can be fitted to opposing surfaces of the respective vertical buses for each of the first, second, and third vertical buses , and the second, second, 3 is formed with spacer window portions corresponding to the second and third horizontal buses, respectively, and the upper end portion of the opposing surface of the first vertical bus bar is connected to the first horizontal bus bar via a spacer. An upper end portion of the opposing surface of the second vertical bus bar is connected to the second horizontal bus bar via a spacer located in a spacer window portion of the second groove portion, and is connected to the bus bar. The upper end portion of the opposing surface of the vertical busbar is connected to the third groove through a spacer located in the spacer window portion of the third groove portion. It is connected to the flat bus.
According to this configuration, each vertical bus is fitted in each groove of the insulating plate, and is difficult to swing and move in the width direction and the front-rear direction, so that a large current such as a short-circuit current flows through each vertical bus. Therefore, even if a strong electromagnetic force is generated between the vertical buses, the vertical buses are not detached from the horizontal buses or bent by the electromagnetic forces, and it is possible to prevent the bus device from being seriously damaged.

As described above, according to the bus device of the present invention, the storage space is widened, and a good storage property can be obtained . Further, if a large current such as a short-circuit current flows through each vertical bus, Even if a strong electromagnetic force is generated between the vertical buses, the vertical buses are not detached from the horizontal buses or bent due to the electromagnetic forces, and it is possible to prevent serious damage as a bus device . There is an effect.

Hereinafter, an embodiment in which a busbar device according to the present invention is applied to an open / close control device for a low-voltage motor in a power plant will be described with reference to FIGS.
The bus device 1 as an open / close control device for a low-voltage motor is generally called a control center. As shown in FIG. 2, the outer shell is constituted by a rectangular outer box 2. In the outer box 2, two wiring processing chambers 3 are formed at the upper and lower ends in the height direction, and eight unit chambers 4 are provided between the two wiring processing chambers 3. A long vertical wiring processing chamber 5 is formed adjacent to each other. In addition, an opening 6 is formed in the eight unit chambers 4, and a door 7 via a hinge is pivoted in the opening 6 so as to open and close it. The unit chamber 4 is configured as a substantially sealed space by closing the door 7.

In the unit chamber 4, a three-phase vertical bus 8 comprising a first vertical bus 8a, a second vertical bus 8b, and a third vertical bus 8c, as shown in FIG. the first, second, third vertical busbar 8a, 8b, 8 c and the first electrically connecting, second, third horizontal busbar serving R-phase horizontal bus 9a, S-phase horizontal bus 9b and T, A three-phase horizontal bus 9 composed of a phase horizontal bus 9c is provided. Details of the vertical bus 8 and the horizontal bus 9 will be described later. A first partition cover 10 and a second partition cover 11 are provided on the front surfaces (surfaces on the opening side) of the vertical bus bar 8 and the horizontal bus bar 9, respectively. The first and second partition covers 10, 11 are provided. Is a structural partition between the vertical bus bar 8 and the horizontal bus bar 9 and a unit to be described later. A plurality of rectangular contact insertion windows 12 in three rows in the width direction are formed on the surface.

  The first partition cover 10 is composed of a thin plate having a rectangular planar shape. For example, as shown in FIG. 4 showing a cross section along the line XX in FIG. It is fixed at. Further, the second partition cover 11 has a mounting plate portion 11a having a shape in which both end portions are bent and projecting, and is constituted by a thin plate having a rectangular planar shape as a whole, and is shown by a YY line in FIG. As shown in FIG. 5 showing the cross section along, the nut 15 is fixed to the outer box 2 and the bus bar support 14 by screwing. The bus bar support 14 has a rectangular bar shape made of an insulating material, and has a structure in which five bolts 14a are embedded in parallel and in an immobile state. It is arranged and fixed. Although not shown, a plurality of bus bar supports 14 are arranged in the length direction of the vertical bus bar 8.

  By the way, in the three-phase horizontal bus 9 composed of the R-phase to T-phase horizontal buses 9a to 9c described above, the cross-section of the R-phase horizontal bus 9a is shown in FIG. It is fixed to the outer box 2 in an immobile state and in an insulated state based on fastening the bolts 17 to the outer box 2 via the insulator 16. 4 shows a cross section of the R-phase horizontal bus 9a, the S-phase and T-phase horizontal buses 9b and 9c have the same configuration.

  Each of the horizontal buses 9a to 9c is provided with a rectangular plate-like insulating plate 18 on the front surface (surface on the partition cover side). As shown in FIG. 1, the insulating plate 18 is formed with a first groove 18a, a second groove 18b, and a third groove 18c, respectively, along the height direction. Of these grooves 18a-c, Each of the second and third grooves 18b and 18c is formed with one spacer window 18d for press-fitting a conductive spacer 19 (washer) interposed between the vertical bus 8 and the horizontal bus 9. ing. In these spacer windows 18d, the spacer window 18d formed in the second groove 18b is formed at a position coincident with the S-phase horizontal bus 9b in the height direction, and the third groove 9c. The spacer window 18d is formed at a position that coincides with the T-phase horizontal bus 9c in the height direction.

In the first to third grooves 18a to 18c of the insulating plate 18, a three-phase vertical bus 8 composed of first to third vertical buses 8a to 8c is disposed as shown in FIG. Yes. The vertical buses 8 are arranged so that their positions are perpendicular to the horizontal buses 9, and as shown in FIG. 5, the bus bar support 14 located on the rear surface of the insulating plate 18. The nut 15 is fixed to the bolt 14a by being screwed onto the bolt 14a.

  As shown in FIGS. 3 and 4, each of these vertical buses 8 a to 8 c has two faces on the mountain side because the cross section is L-shaped, and one of the two faces is one of the two faces. The surface is positioned so as to face each of the horizontal buses 9a to 9c, and is fitted into each of the grooves 18a to 18c of the insulating plate 18 to constitute a facing surface 8e. In this case, as shown in FIG. 1, the upper end of the vertical bus facing surface 8 e is electrically connected to the horizontal bus 9 by passing the spacer 19 (washer) through the spacer window 18 d of the insulating plate 18. Connected to. Further, in each of the vertical buses 8a to 8c, the other one surface protrudes at a right angle in a direction opposite to the facing surface 8e and is configured as a contact surface 8d.

  As is clear from the above description, the insulating plate 18 is configured to be sandwiched between the vertical bus bar 8 and the horizontal bus bar 9. Thereby, for example, even when the first vertical bus 8a is connected to the R-phase horizontal bus 9a located at the uppermost position in each of the horizontal buses 9a to 9c arranged in three phases in the height direction, the first vertical bus The bus 8a is configured not to contact the S-phase and T-phase horizontal buses 9b and 9c. The same applies to the relationship between second vertical bus 8b and T-phase horizontal bus 9c. And the upper edge part of the said insulating board 18 is comprised so that it may be located in the front surface of the horizontal bus-bar 9, in other words, the upper edge part in the opposing surface of the vertical bus-bar 8, These parts are shown in FIG. It is located in the back of the uppermost unit chamber 4a.

In the bus device 1 configured as described above, when power is supplied from a power supply device (not shown) to the horizontal bus 9, power is supplied from the horizontal bus 9 to the vertical bus 8 via the spacer 19 (washer). Is supplied. At this time, each unit chamber 4 is inserted with a unit 20 for controlling opening and closing of the low-voltage motor, as shown in FIG. As shown in FIG. 3 , the unit 20 is provided with three pairs of contacts 20 a on the rear surface, and the three pairs of contacts 20 a are inserted in three rows of contacts formed on the insulating plate 18. Electric power is supplied to the unit 20 by inserting the contact surface 8d of the vertical bus 8 through the window 12.

Incidentally, in this case, in the back of the unit chamber 4 at the uppermost end portion shown in FIG. 5, as described above, the upper end portion of the opposing surface 8 e of the vertical bus 8 and the horizontal bus 9 are electrically connected. However, in the busbar device 1 in the present embodiment, among the plurality of (eight in the present embodiment) unit chambers 4 formed in the outer box 2, in the back of the unit chamber 4 located at the uppermost end. The opposing surface 8 e and the contact surface 8 d of the vertical bus 8 connected to the horizontal bus 9 are not wound with an insulating tube or the like as in the prior art, but instead the insulating plate 18 is extended to the front of the horizontal bus 9. In other words, the vertical bus bar 8 is arranged up to the upper end portion of the opposing surface 8e, thereby electrically insulating each other. For this reason, also in the unit 20 inserted in the uppermost end, the three pairs of contacts 20a of the unit 20 reliably sandwich the contact surface 8d of the vertical bus 8 and electrically connect each other. Since it can prevent becoming a dead space, the storage property of a bus-bar apparatus can be made favorable.

Further, the vertical bus bar 8 is configured to be fitted and disposed in each of the groove portions 18 a to 18 c formed in the insulating plate 18. For this reason, even if a short-circuit current flows through the vertical bus 8 for some reason and a strong electromagnetic force is generated between the vertical buses 8, the vertical bus 8 is prevented from being distorted or disconnected from the horizontal bus 9. Therefore, it is possible to prevent the bus device 1 from being seriously damaged.

In addition, in the said Example, although the bus-line apparatus 1 of this invention was applied to the switching control apparatus of the low voltage motor in a power plant, it is not limited to this, The application object is suitably changed in the range which does not deviate from a summary. It can be done .

  Further, the vertical bus 8 and the insulating plate 18 are supported together by the bus support 14, but the present invention is not limited to this. For example, the vertical bus 8 and the insulating plate 18 may be separately fixed.

1 is an exploded perspective view of an essential part of the present invention. Perspective view of busbar device Assembly drawing of main parts Sectional drawing which follows the XX line of FIG. Sectional drawing which follows the YY line of FIG. FIG. 2 equivalent diagram showing a conventional example FIG. 3 equivalent view showing a conventional example

Explanation of symbols

In the figure, 1 is a busbar device, 2 is an outer box, 8 is a vertical busbar, 9 is a horizontal busbar, 14 is a busbar support, 18 is an insulating plate, and 18a-c are groove portions.

Claims (1)

And an outer box, the first arranged above and below the top of the outer box, second, and third horizontal busbar, first the upper end Ru is electrically connected to the horizontal bus, the second, A bus device comprising: 3 vertical bus bars; a bus bar support for supporting the vertical bus bar; and an insulating plate disposed between the bus bar support and the vertical bus bar.
By extending the insulating plate to the front surface of the horizontal bus bar so as to partition between the different phases in the vertical bus bar and the horizontal bus bar,
Each of the vertical buses is configured in an L-shaped cross section having a facing surface facing the horizontal bus bar side and a contact surface perpendicular to the horizontal bus bar and projecting to the side opposite to the horizontal bus bar side.
The insulating plate is formed with first, second, and third groove portions that can be fitted to opposing surfaces of the vertical buses for each of the first, second, and third vertical buses , and the second In the third groove portion, spacer window portions corresponding to the second and third horizontal bus bars are formed, respectively.
An upper end portion of the facing surface of the first vertical bus bar is connected to the first horizontal bus bar via a spacer, and an upper end portion of the facing surface of the second vertical bus bar is used for a spacer of the second groove portion. It is connected to the second horizontal bus via a spacer located in the window, and the upper end of the opposite surface of the third vertical bus is connected to the spacer located in the spacer window of the third groove A busbar device connected to the third horizontal busbar .

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