JPS6011697Y2 - Busbar device - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a busbar device in a closed switchboard or the like in which a plurality of units are housed in multiple stages, and particularly relates to a cover for insulation and support.

[Technical background of the invention and its problems]

As shown in FIG. 6, this type of closed switchboard has a structure in which a box-shaped panel frame 1 is partitioned vertically into multiple levels by shelf boards 2 to form a plurality of unit rooms 3, and each unit room has a unit inside it. Each is stored in a drawable state.

Here, the unit has a circuit configuration in which various switching control devices such as a circuit breaker, an electrode contactor, and a control relay are placed on a common frame to obtain a predetermined control function, and the main circuit is connected to the frame 1. A conductor (bus conductor) 5 configured together with the insulating cover 4 is configured to be connected or disconnected when the unit is pulled out or inserted.

The structure of the insulating cover 4 and the bus conductor 5 in such a closed switchboard is as shown in FIG. As shown in FIG. 8, the bus conductor 5 is sandwiched from both sides by the insulating cover 4 in which mounting holes 7 and mounting holes 9 are formed at regular intervals. 1 with mounting screws 9a.

By the way, the units housed in the closed switchboard are available in a variety of capacities depending on the type of load, but the current flowing through the bus conductor 5 changes over a wide range depending on the combination of stacking.

Therefore, it can be made economical by selecting the size of the bus conductor according to the size of the load and configuring the bus conductor to match the load.However, in the conventional method, as shown in Figure 9, When a large vertical busbar 5a is installed, it is necessary to prepare insulating spacers 10 in the middle for each size of the busbar conductor.

Further, since the bus conductors 5a are attached to each other by the tightening screws 7a as described above, it is necessary to widen the distance between the bus conductors due to the creepage distance.

[Purpose of invention]

An object of the present invention is to provide a busbar device having an insulating cover that is applicable to various busbar conductor sizes.

[Summary of the idea]

That is, the present invention provides a busbar device in which a pair of insulating covers each having a plurality of substantially parallel conductor supporting grooves are combined to support a conductor so that the grooves face each other. A concave portion having a length almost the entire length of the groove between each groove, and a plurality of grooves formed on the inner side wall, and a convex portion having a protrusion that engages with the concave portion are provided. be.

The grooves and protrusions of the concave and convex portions are formed in multiple layers,
It is possible to support multiple types of conductors by combining the engaging positions.

[Example of idea]

The present invention will be explained with reference to an embodiment shown in FIGS. 1 to 5. FIGS. 1 and 2 show an embodiment in which the present invention is applied to a bus bar of three horizontal conductors.

In the figure, reference numeral 14 denotes an insulating cover, and the insulating cover 14 has conductor support grooves 18 for supporting the busbar conductor formed at equal intervals over the entire length, and a length corresponding to approximately the entire length between the conductor support grooves 18. It has a wedge-shaped protrusion 24 which has a recess 22 formed by forming a plurality of grooves 21 on the inner side wall or a protrusion 23 of the same shape or a different shape that engages with the recess 22 .

Further, both ends of the insulating cover 14 are bent at right angles in opposite directions, and one side has a round hole 19a for mounting, and the other side has an oval hole or notch hole 19b for mounting. When the insulating covers 14 are combined facing each other, they overlap.

Furthermore, cutouts 16 are provided in the conductor support groove 18 at certain intervals to enable connection between the busbar conductor 15 and a unit main circuit (not shown).

3 and 4 are plan views showing bus conductors of different sizes attached using the insulating cover 14 of the present invention shown in FIGS. 1 and 2. FIG.

The insulating cover 14 of the present invention can sandwich the bus conductor in a sandwich-like manner by placing two pieces of the insulating cover 14 facing each other, engaging the protrusion 23 of the convex part 24 and the groove 21 of the concave part 22, and sliding it in the longitudinal direction. , when supporting a small-sized bus conductor 15 as shown in FIG.
When supporting a large-sized bus conductor 15a as shown in FIG. 4, the present invention can be applied to bus conductors of a plurality of sizes by reducing the number of engagements according to the width of the bus conductor 15a.

To attach the insulating cover 14 to the panel frame, use the mounting screw 1.
It will be held at 9.

Each bus conductor is completely isolated by the convex portion 24 and the bending of both ends of the insulating cover 14, and disasters such as arc migration can be prevented.

Further, since the protrusion 23 of the convex part 24 and the groove 21 of the concave part 22 engage in a wedge shape, the connection function is not impaired even if a short circuit current flows in the bus conductor and a tensile and compressive force is applied.

Furthermore, the bolts that connect the insulation covers to each other have been eliminated.
The concave and convex portions provided on the insulating cover make the connection easier, which reduces work time, and the concave portion increases the creepage distance, making it possible to shorten the distance between the bus conductors and make the insulating cover more compact. can be converted into

FIG. 5 shows another embodiment of the present invention.

This is a case where one insulating cover is provided with a convex portion and the other insulating cover is provided with a recessed portion, and the same effect can be obtained with this configuration as well.

[Effect of idea]

As described above, according to the busbar device of the present invention, busbar conductors of a plurality of sizes can be easily supported by a pair of insulating covers.

[Brief explanation of drawings]

Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a plan view of the embodiment of Figure 1, and Figures 3 and 4 are views of Figure 1 and 2.
FIG. 5 is a plan view of another embodiment of the present invention, FIG. 6 is a perspective view of a general closed switchboard, and FIG. 7 is a conventional insulating cover. Example perspective view,
8 and 9 are plan views of the conventional example shown in FIG. 7. 14... Insulation cover, 15, 15a... Curved line conductor, 16... Notch, 18... Curved conductor support groove, 21... Groove, 22...・・・Concavity, 23・
...Protrusion, 24...Protrusion.

Claims (3)

[Scope of utility model registration request] (1) In a busbar device that supports a conductor by combining a pair of insulating covers each having a plurality of conductor supporting grooves formed substantially in parallel so that the conductor supporting grooves face each other, the pair of insulating covers A recessed portion having a length corresponding to approximately the entire length of the conductor supporting groove in the longitudinal direction and having a plurality of grooves formed along the depth direction on the inner side wall, in a portion located between each conductor supporting groove. A busbar device characterized in that a convex portion having a protrusion that engages with the busbar device is provided and coupled to the convex portion. (2) Both of the pair of insulating covers have a concave part and a convex part,
The busbar device according to claim 1, wherein the concave portion and the convex portion are formed so as to form a pair when the insulating covers are opposed to each other. (3) The busbar device according to claim (1), wherein one of the pair of insulating covers has a concave portion and the other has a convex portion.