JP4722677B2 - switchboard - Google Patents

Description

  The present invention relates to a technology for connecting a conductor to a bus of a switchboard having a bus with a large current capacity.

  On the power distribution board for ship's generator, the circuit breaker provided for each of the plurality of generators installed outside is housed in the lower part, and the output terminal of each circuit breaker is connected in parallel via a plate-shaped relay conductor Many have busbars stored in the upper part. Some large vessels have a large capacity in which the current flowing through the bus at full load exceeds 1000 amperes. Since such a bus has a large cross-sectional area and is constituted by a long conductive plate, it has been troublesome to process a hole for connecting the above-described relay conductor.

  Japanese Patent Laid-Open No. 2001-268726 discloses a first prior art of a switchboard in which a relay conductor is connected to a bus bar as described above without drilling. Referring to FIG. 4 showing this prior art, this technique has a U-shaped cross section in a distribution board having a busbar in which a plurality of busbar bars 30 extending in the left-right direction and having a width surface facing the front of the switchboard are arranged in parallel. The relay connection block plate 31 is disposed so as to come into contact with the plate thickness surfaces on the lower surface side of all the bus bar bars 30 whose shoulder portions 31a are parallel, and the auxiliary member 32 is arranged on the plate thickness surface on the upper surface side of the bus bar facing each other. It is arranged so as to come into contact. Then, the auxiliary member 32 and the shoulder 31a of the relay connection block 31 are fastened with a screw 33 that passes through the gap between the bus bars facing each other, and one end is connected to the circuit breaker (not shown) on the arm 31b of the relay connection block 31. The breaker and the bus bar 30 are connected to each other by connecting the relay conductor 34.

Further, the switchboard disclosed in Japanese Patent Laid-Open No. 2005-27482 is not a switchboard for a generator, but the second prior art for connecting a conductive bar and a conductive bar without drilling one conductive bar is disclosed. It is disclosed. Referring to FIG. 5 showing this prior art, in this technique, the conductive bars and the circuit breaker 42 are arranged on the upper surfaces of the conductive bars 40 and 41, both of which have a width surface facing upward and arranged in parallel on a horizontal plane. A conductive bar 43 having a width surface to be connected facing upward is disposed, and a conductor holding member 44 having a cross section bent in a U-shape and a screw hole formed in the center is disposed on the lower surface of the conductive bars 40 and 41.
Then, the conductive bar 43, the conductive bar 40, and the conductive bar 41 are screwed into the screw holes of the conductor holding member 44 by inserting screws 45 that pass through the holes formed in the conductive bar 43 and the gaps between the conductive bars 40 and 41. Is configured to connect.
JP 2001-268726 A JP 2005-27482 A

However, the first conventional technique described above has a problem in that the relay connection block 31 having a complicated configuration with a U-shaped cross section is required to connect the bus bar 30 and the relay conductor 34.
The second conventional technique is a technique for connecting conductive bars in a circuit having a relatively small current capacity, and has a problem that it cannot be applied to a circuit having a large current capacity such as a power distribution board for a generator.
Accordingly, an object of the present invention is to provide a switchboard having a large current capacity bus bar to which conductors can be easily connected.

In order to solve the above-described problem, the invention of claim 1 is directed to a plurality of circuit breakers (1) that receive power of a plurality of external power supply devices for each power supply device, and output terminals (6) of the respective circuit breakers. A relay conductor (8, 9, 10) having one end connected to the same and a bus bar (2, 3, 4) having a width surface facing the front and extending in the left-right direction is connected to the other end of the relay conductor. In the switchboard, the busbar is composed of a plurality of plate-shaped busbars having the same cross-sectional shape and arranged in the same vertical plane with a predetermined gap in the vertical direction (G1). And having a relay conductor (8, 9, 10) composed of a plurality of plate-like connection bars arranged so as to sandwich the width surface of the bus bar in a sandwich shape, and in the vertical direction with the holes formed in each connection bar A connection that passes through the gap of the predetermined dimension between adjacent bus bars. It is assumed that the bus bar and the relay conductor are connected by the connecting screw (11 ) .

According to a second aspect of the present invention, in the first aspect of the present invention, the bus bars are each composed of a plurality of bus bar bars included in vertical planes parallel to each other, and the bus bar bars included in the opposing vertical planes are opposed to each other in their width planes. It is arranged that the bus bar and the connection bar are alternately sandwiched.

  According to the first aspect of the present invention, it is possible to eliminate the need for drilling the connecting screw for the large and heavy bus bar, and not to insert the connecting screw into the hole formed in the bus bar as in the prior art. Since it is only necessary to easily pass through the gap between the busbars in the left and right direction, there is no restriction, so it is possible to easily connect multiple connection bars arranged in a sandwich shape, and to process parts for switchboards with large current capacity busbars. And has the effect of simplifying assembly work.

According to the second aspect of the present invention, since the plurality of bus bars extending in the left-right direction are arranged not only in the vertical direction but also in the depth direction, there is an effect that a switchboard having a larger current capacity can be easily realized.

  Embodiments of the present invention will be described with reference to the examples shown in FIGS. This embodiment is configured by connecting and combining three unit switchboards each having one frame to one generator in a power distribution board for a ship having three three-phase generators. 1 to 3 are views showing one of the unit switchboards described above. In these figures, in order to clearly show the main members of the present invention, some members such as covers and frame members are omitted.

  Referring to FIG. 1, a circuit breaker 1 is provided at the lower front portion of the unit switchboard, and an R-phase, S-phase, and T-phase busbar 2, busbar 3 and busbar 4 are all provided at the upper portion of the switchboard. It is provided in parallel with the front. These bus bars are arranged close to each other on the same horizontal plane so that the T-phase bus bar 4 does not hinder the connection work between the S-phase relay conductor 9 and the S-phase bus bar 3 described later. When viewed from the side, the central S-phase bus 3 is disposed below the other-phase bus so as to reduce the heat generation. From the back surface of the above-mentioned circuit breaker 1, the input side terminal 5 and the output side terminal 6 of each phase protrude, and the auxiliary terminal plate 7 attached to the input side terminal 5 has an external generator (not shown). Cable is connected. On the other hand, the output side terminal 6 is connected to the relay conductor 8, the relay conductor 9, and the relay conductor 10 of the R phase, the S phase, and the T phase that are directed upward via the relay member.

  Next, referring to FIGS. 1 to 3, the configuration of the above-described busbar, relay conductor, and busbar mounting members is substantially the same for each phase. Will be described. The bus bar 4 is composed of a plurality of bus bar bars that have the same cross section and are attached so that the width surface faces the front of the switchboard. The bus bar 4 has four bus bars arranged with a gap G1 having a predetermined dimension in the vertical direction in one vertical plane, and the width planes of the four bus bars and the gap G2 in the depth direction. It is composed of a total of eight bus bars of four bus bars provided to face each other.

  When viewed from the front of the switchboard, the T-phase relay conductors 10 are composed of nine connection bars having three rows in the left-right direction and three rows in the depth direction, and exhibiting the same cross section. This connection bar is in a state where the bus bar of the bus bar 4 is sandwiched alternately by the connection bar of the relay conductor 10 for each column in the left-right direction, that is, the front side of the bus bar 4, the back side of the bus bar 4, and the bus bar 4 between the two bus bars facing in the depth direction. That is, the gap G2 between the bus bars facing the depth direction of the bus bar 4 is equal to the thickness of the connection bar of the relay conductor 10.

  Each connection bar of the relay conductor 10 is positioned such that its upper end protrudes further upward than the uppermost bus bar of the bus bar 4. And one row of locations that are close to the uppermost bus bar at the protruding portion, three locations that correspond to the gap G1 between the bus bars adjacent in the vertical direction of the bus 4 and the lower portion of the lower bus bar Each of the connection bars and the bus bar are connected by five connection screws 11 that pass through the holes formed in each connection bar and the above-described vertical gap G1. That is, the gap G <b> 1 between the bus bars adjacent to each other in the vertical direction of the bus bar 4 is set to be larger than the diameter of the connection screw 11.

  The distribution board is provided with an attachment member 12 for attaching the bus bar 4 to a frame body of the distribution board and an insulating plate 13 for fixing the attachment member 12. Each of the attachment members 12 is a rigid member, and like the connection bar of the relay conductor 10, the member disposed on the front side of the bus bar 4, the member disposed on the back side of the bus bar 4, and the bus bar 4 And a member having a thickness equal to that of G2 disposed between two rows of bus bars facing in the depth direction. Among these members, the members arranged on the front side of the bus bar 4 have an L-shaped cross section, and one of the L-shaped surfaces and the other members of the attachment member 12 are the same as the connection bars of the relay conductor 10. In addition, each bus bar of the bus bar 4 is integrated with five fixing screws 14. In this integrated state, the other L-shaped surface of the front side member is fixed to the insulating plate 13 with a fixing screw 15, and the insulating plate 13 is fixed to the frame, whereby the bus bar 4 is connected to the frame of the switchboard. It is attached to the body.

Next, as described at the beginning, the switchboard of the present embodiment is completed by juxtaposing the three unit switchboards in the left-right direction so as to contact each other and connecting them together. Below, the configurations of the R-phase, S-phase, and T-phase connection conductors 16, the connection conductors 17 and the connection conductors 18 that connect the buses of adjacent unit switchboards are the same for each phase. The connecting conductor 18 will be described.
In FIG. 2 and FIG. 3, the unit switchboards arranged next to each other are denoted by “2A”, “3A”, and “4A” and only the bus bars are shown.
The connection conductor 18 has a configuration in which three rows of connection bars extending in the depth direction are provided so as to cover all of the eight bus bars in total, four lines arranged in the vertical direction of the bus bar 4 and the bus bar 4A when the switchboard is viewed from the back side. Yes.

  Similarly to the connection bar of the relay conductor 10, the connection bar of the connection conductor 18 is in a state where the bus bar of the bus bar 4 is alternately sandwiched between the connection bars of the connection conductor 18 for each column in the vertical direction, that is, Arranged between the front side of the bus bar 4 and the bus bar 4A, the back side of the bus bar 4 and the bus bar 4A, and between the two bus bars facing each other of the bus bar 4 and the bus bar 4A. A hole is formed in the connection bar of the connecting conductor 18 at a location corresponding to the vertical gap G1 between the bus bar 4 and the bus bar of the bus bar 4A, and the hole of the connecting conductor 18 and the above-described vertical gap G1 are formed. The connection between the bus bar 4 and the bus bar 4A is realized by the connecting screw 19 to be inserted.

  In the above-described embodiment, referring to FIG. 2, the connection bar of the connecting conductor 18 is fastened to the bus bar at three locations in the vertical direction so that the width of the bus bar consisting of four bus bar bars in the vertical direction is substantially the same. is doing. However, although not shown, a connection bar having a width wider than the width of the bus bar is used, and the portion above the upper side of the bus bar at the top of the bus bar as in the connection between the relay conductor 10 and the bus bar 4 described above. Further, a connection screw 19 may be added to a portion below the lower side of the lowermost bus bar, and the connection may be made at five locations in the vertical direction.

  In the above-described embodiment, referring to FIG. 2, the connecting conductor 18 has a configuration in which three rows of connecting bars extending in the depth direction are provided over the four bus bars arranged above and below the bus 4 and the bus 4A. Yes. However, although not shown in the drawing, it may be constituted by a total of nine connection bars in which three connection bars extending only in the vertical direction of the bus bar and extending in three rows in the depth direction are provided. In this case, a hole through which the connection screw 19 is inserted is formed in each connection bar.

The connecting conductor 18 is provided to connect the unit switchboards of the generator switchboard. However, the connecting conductor 18 is adjacent to the power supply switchboard having the same configuration as that of one unit switchboard of the generator switchboard. It may be used for connection with the bus of other switchboards.
Moreover, although the Example mentioned above is a thing of the switchboard for generators of a ship, it is not limited to this.

It is a figure which shows the unit switchboard of the switchboard by the Example of this invention, Comprising: It is an internal perspective view seen from the back upper side. It is a reverse view of the unit switchboard of FIG. It is a top view of the unit switchboard of FIG. It is the fragmentary figure which shows the connection part of the bus-line and relay conductor of the conventional switchboard, Comprising: (a) A perspective view, (b) It is a front view. It is a fragmentary perspective view which shows the inside of the other conventional switchboard.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Circuit breaker 2,3,4,2A, 3A, 4A Bus-bar 5 Input side terminal 6 Output side terminal 7 Auxiliary terminal board 8, 9, 10 Relay conductor 11, 19 Connection screw 12 Mounting member 13 Insulation board 14, 15 Fixing screw 16, 17, 18 Connecting conductor G1 Bus bar vertical gap G2 Bus bar depth gap

Claims (2)

A plurality of circuit breakers (1) for receiving the power of a plurality of external power supply devices for each power supply device, and relay conductors (8, 9, 10) having one ends connected to output terminals (6) of the respective circuit breakers; In the switchboard which accommodates the busbars (2, 3, 4) in which the width surface to which the other ends of the relay conductors are commonly connected faces the front and extends in the left-right direction,
The bus comprises a plurality of plate-shaped bus bars having the same cross-sectional shape and arranged with a gap (G1) having a predetermined dimension in the vertical direction within the same vertical plane,
Having a relay conductor (8, 9, 10) composed of a plurality of plate-shaped connection bars arranged so that the width surface faces the front and cooperates to sandwich the width surface of the bus bar in a sandwich shape;
By connection screws ( 11) that pass through the holes formed in each connection bar and the gap of the predetermined dimension of the bus bar adjacent in the vertical direction,
The switchboard, wherein the bus bar and the relay conductor are connected. The bus bars are each composed of a plurality of bus bars included in vertical planes parallel to each other, and the bus bar bars included in the vertical planes facing each other are arranged so that their width surfaces face each other, and the bus bars and the connection bars are alternately arranged. The switchboard according to claim 1, wherein the switchboard is arranged so as to be sandwiched between the switchboards.

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