JPS591370Y2 - Busbar device - Google Patents

Description

[Detailed Description of the Invention] (a) Description of the Technical Field The present invention relates to a busbar device used in a closed switchboard or the like, and relates to a connection structure for connecting the busbars to each other.

(b) Description of the Prior Art There are various configurations of bus bar configurations in closed switchboards, but in recent years, with the spread of insulating materials, significant progress has been made in reducing the size of the bus bar configurations of closed switchboards.

FIG. 1 shows one example of this, in which an insulating material is interposed between bus bars to provide insulation between different phases.

In the figure, main busbars 1a, 1b, IC (7), branch busbars 2a, 2b, and 2C are in close contact with each other through an insulating cover 3 that also serves as support for the branch busbars. Insulated by proof strength.

On the other hand, for example, the in-phase connection between the main bus bar 1a and the branch bus bar 2a is achieved by interposing a conductive spacer 4a corresponding to the plate thickness of the insulating cover 3 in a notch hole 3a provided in the insulating cover 3.
Conductive performance is obtained by contacting with the branch bus bar 2a.

However, in such an in-phase connection section configuration, as shown in the cross-sectional view of the connection section in FIG. Insertion confirmation could not be visually confirmed from the outside.

The fact that this insertion cannot be confirmed means that it is not possible to check for leakage of the conductive spacer 4a, which can lead to accidents such as heat generation due to leakage, and losses due to the inability to visually inspect disassembly and reassembly for checking. It was a huge amount.

(C) Purpose of the invention The purpose of the present invention is to provide a busbar device in which conductive spacers interposed between conductors can be visually confirmed from the outside even after assembly.

(d) Structure of the invention The invention uses two conductors placed opposite each other with an insulating plate in between.
When interconnecting connection openings formed in an insulating plate via a conductive spacer, by providing a confirmation hole in the portion of at least one conductor that faces the conductive spacer, conduction can be conducted from the outside through this hole. This allows confirmation of the presence or absence of a spacer.

(e) Examples of ideas The present invention will be explained below using an embodiment shown in the drawings.

3 and 4 show the structure of the connecting portion, FIG. 3 is a sectional view showing the main part of the connecting portion, and FIG. 4 is a front view.

In the figure, the conductor 2a for the branch busbar, the insulating cover 3, and the conductive spacer 4a have the same shape as the conventional one, but the conductor 11a for the main busbar has an insertion hole 6 for the tightening bolt 5.
In addition, a confirmation hole 7 is provided at a position that overlaps the conductive spacer 4a when the conductors 2a and lla are tightened.

By providing the confirmation hole 7 in the main bus bar 11a in this manner, it is possible to visually check from the outside through the confirmation hole 7 whether or not the conductive spacer 4a, which has a smaller outer diameter than the conductor 11a of the main bus bar, is present.

If the confirmation hole 7 is provided at the end of the conductive spacer 4a and the end of the insulating cover 3, it can be checked at the same time even if the conductive spacer 4a overlaps the insulating cover 3 or is misaligned. is possible.

Other embodiments are shown in FIGS. 5 and 6.

Figure 5 shows the main bus conductor 12a and conductive spacer 13a.
In addition to the tightening bolt insertion hole 8, projections 9a and 9b are formed on the conductive spacer 13a.

On the other hand, the main bus conductor 12 has a tightening bolt insertion hole 1 on the a side.
0 as well as protrusions 9a and 9b provided on the conductive spacer 13a.
and connect the conductive spacer 13a to the conductor 12 for the main bus bar.
A confirmation hole 14a that can be locked on top of a.

14b is provided.

FIG. 6 shows the conductor 2a for the branch busbar, the insulating cover 3, the conductive spacer 13a, and the conductor 12 for the main busbar.
FIG.

In this case, the presence or absence of the conductive spacer 13a can be confirmed through the confirmation holes 14a and 14b provided in the main bus conductor 12a.

In addition, a confirmation hole 14 provided in the main bus conductor 12a
Protrusions 9a, 9 of conductive spacer 13a on a14b
By fitting b, the conductive spacer 13a can be locked onto the main bus conductor 12a, and the work of holding down the conductor spacer during assembly can be reduced.

Each of the above embodiments describes visual inspection from the main bus conductor side, but if a confirmation hole is provided on the branch bus conductor side, visual inspection from the branch bus side is possible, and also from both sides. If provided, confirmation from both sides becomes possible.

(g) Effect of the invention As described above, according to the invention, two conductors facing each other with an insulating plate interposed therebetween can be connected to each other by interposing a conductive spacer in the connection hole formed in the insulating plate. Since a confirmation hole is provided in at least one of the conductors, the presence or absence of the conductive spacer can be confirmed after assembly, and accidents such as heat generation due to failure to attach the conductive spacer can be effectively prevented.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing a conventional bus bar structure, Fig. 2 is a sectional view of main parts showing a conventional bus bar structure, and Fig. 3 is a sectional view of main parts showing an embodiment of a bus bar device according to the present invention. 4 is a right side view of FIG. 3, FIG. 5 is an exploded perspective view showing another embodiment of the present invention, and FIG. 6 is a sectional view of a main part of the device shown in FIG. 5, showing an assembled state. 2 a, 11 a, 12 a...Conductor, 3...
... Insulating cover, 4a, 13a ... Conductive spacer, 7, 14 a, 14 b ... Confirmation hole, 9a, 9b ... Protrusion.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ Two conductors that are joined to each other through an insulating cover are configured to be conductively connected to each other using a conductive spacer that is interposed in a connection opening provided in the insulating cover. 2. A busbar device according to claim 1, wherein a confirmation hole is provided in a portion of the conductor that faces at least one of the conductive spacers. 2. The busbar device according to claim 1, wherein the conductive spacer is a conductive spacer having a protrusion that fits into a confirmation hole formed in the conductor.