JPH0684737U - Bus duct connection device - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the conductor connection work and downsize the bus duct, and to easily visually check the tightened state of the conductor connection fastening parts to prevent forgetting the tightening. [Structure] Tightening is not completed for the overlapping parts of the conductor insulation coating stripped parts, or for the conductor and patch plate overlay parts where the conductor insulation stripped parts are butted And a connecting device for bus ducts, which is secured with a fastening part that has a display part that allows visual confirmation of completion, and insulating partition plates are placed between different phases of conductor connection points.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high-voltage bus duct or a bus duct connecting device using an insulating partition plate for a conductor connecting portion in a closed switchboard.

[0002]

[Prior art]

 The conductor of the high-voltage bus duct or the conductor such as the bus bar of the closed switchboard has an insulation coating (generally abbreviated as an insulated conductor), so when connecting the insulated conductor, try to connect the conductors. Remove the insulation coating from the parts, overlap the bare parts of the insulated conductor, and fix them with fastening parts such as bolts and nuts that penetrate the overlapped parts. Alternatively, a patch plate (made of a conductor) is attached to a portion where the bare portions of the insulated conductor are butted against each other, and the bare portion of the insulated conductor and the overlapping portion of the patch plate are fixed by the same means as above.

Since the fastening connection portion of the insulated conductor is in a bare state in which the insulation coating is removed, an insulation tape is wound around each fastening component for insulation treatment. Alternatively, instead of wrapping the insulating tape, the fastening connection point is covered with a two-piece mold made of a slightly soft synthetic resin material, for example, a leather cover in the middle, and the end of the insulating cover is taped or covered with the insulating coating of the conductor. It is fixed with a tightening band (see FIGS. 1 and 2 of Japanese Utility Model Publication No. 57-4802).

[0004]

[Problems to be solved by the device]

 However, with the conventional insulated conductor connecting device in the above-mentioned bus duct, the tightening condition of the tightening parts such as bolts and nuts cannot be visually confirmed from the outside, so the compression tightening of the tightening parts is forgotten, and the conductor connection point is temporarily tightened. In some cases, insulation may be applied in this state, and due to imperfect contact between the conductors at the connection point or between the conductor and the caul plate, the connection point may generate heat and an accident may occur. The present invention solves the problems in the above-described conventional bus duct connecting device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the bus duct connecting device according to the present invention is a bus duct in which a plurality of phases of insulated conductors are arranged in parallel in the duct. The parts with the insulation coating peeled off from each other are butt-jointed, and the overlapping part of the conductor and the contact plate with the contact plate is fixed with a tightening part that has a display part that allows you to visually confirm the completion and completion of tightening. An insulating partition plate is arranged between adjacent conductor connection points and between the conductor connection points and the duct side plate.

[0006]

[Action]

 Since the insulating partition walls are arranged between the adjacent conductor connection points and between the conductor connection points and the duct side plate, it is not necessary to cover the fastening parts of the conductor connection points with the insulating tape or the insulating cover. Therefore, if you remove the lid of the bus duct at the conductor connection point, the fastening parts will always be visible, and since the fastening parts are equipped with an indicator that allows you to visually confirm the completion and completion of the fastening, You can visually check the compression tightening state of the product at any time.

[0007]

【Example】

 A structure of an embodiment of a bus duct connecting device according to the present invention will be described with reference to the drawings. The drawing shows that the three-phase strip-shaped insulated conductors 2, 3 and 4 are staggered in the duct 1 and the conductors 2 and 3 and 4 are horizontally arranged with a predetermined insulation distance so that the surfaces of the conductors 2 and 3 and 4 do not face each other. The insulating support members 5, 6 and 7 that are arranged and fix the strip-shaped insulated conductors 2, 3 and 4 to the duct 1 are far from the duct 1 of the strip-shaped insulated conductors 2 and 3 and 4, respectively. The connection part of the bus duct installed between the side surfaces 2a, 3a, 4a and the duct 1 is shown. The three-phase strip-shaped insulated conductors may be arranged side by side in the same horizontal plane instead of the staggered shape in the figure. It is also possible to install an insulating support member for fixing the strip-shaped insulated conductor to the duct on the same side of each conductor.

The insulating coating is stripped off over a predetermined length from the connection side end of each strip-shaped insulated conductor 2, 3, 4 to expose the conductor. The ends of the bare conductors are butted against each other, a conductor-made contact plate 8 is attached to one side of the conductor, and the overlapping part of the conductor and the contact plate is fastened with fastening parts (bolts and nuts in the embodiment) 9 and 10. It is stuck. To connect the conductors to each other, the bare parts of the conductors may be overlapped with each other and fixed by fastening parts.

Insulating partition plates 11 stand between adjacent conductor connection points and between the outermost conductor connection points and the duct side plate 1A. The insulating partition plate 11 is made of a synthetic resin plate such as a phenol resin, a polycarbonate resin, or an acrylic resin, which has a good electric insulating property. In addition, when the insulating partition plate 11 is made of a transparent material, there is an advantage that the internal state can be easily seen. The upper and lower portions of the duct 1 where the conductors are connected can be detached as a lid. In FIG. 1, the upper surface side is open.

The means for attaching the insulating partition plate 11 is arbitrary, but in the embodiment, a pair of upper and lower beam members 12 are passed between the left and right duct side plates 1A and 1A before and after the conductor connection point, and fixed. The front and rear edges of the insulating partition plate 11 are dropped and fitted and supported in the slits 13 provided on the opposite surfaces of the beam member 12.

As the fastening parts 9 and 10 having a display portion capable of visually confirming whether or not the fastening has been completed, a combination of the double-headed bolt 9 shown in FIG. 4A and a normal nut, and There is a combination of the double-headed nut 10A of FIG. 4 (b) and a normal bolt, and the like. The double-headed nut 10A has a structure in which there is no internal thread only in the outer head and the narrow neck can be screwed off with a predetermined tightening torque to remove the outer head. It has a structure in which the thin neck part is twisted with a predetermined tightening torque, the outer head part and the inner head part, that is, the inner and outer nuts are locked to each other, and the corner parts of the inner and outer nuts are displaced from each other. and so on.

The fastening parts shown in FIGS. 1 and 2 use the double-headed bolt 9 and the ordinary nut 10 shown in FIG. 4 (a). The bolt 9 at the conductor connecting portion of the center phase has its thin neck portion screwed off and the outer head portion has been lost by being tightened to a predetermined tightening torque, that is, when the tightening is completed. The bolts 9 at the conductor connection points on both sides have not been tightened yet, so the outer head remains.

[0013] Furthermore, a groove formed on the outer periphery of the washer used for tightening the bolt / nut is filled with a plastic material, and the plastic material in the groove protrudes out of the groove due to compression deformation of the washer due to tightening, thus completing tightening. Can be used. In addition, it is possible to use fastening parts with a display that allows visual confirmation of the completion and completion of various tightenings.

[0014]

[Effect of device]

 Since the bus duct connecting device according to the present invention has the above-described configuration, the insulating connecting partition plate electrically isolates the different phases of the conductor connecting points from each other, and the fastening parts at each conductor connecting point are insulated with an insulating tape or an insulating cover. No need to coat. Therefore, the tightened parts are always visible, and since the tightened parts have parts that can be visually confirmed to confirm the completion and completion of tightening, the compression tightened condition of each tightened part is always visible. You can easily find any abnormalities at the conductor connection points. In addition, the fact that it is not necessary to cover the fastening parts with an insulating tape or an insulating cover simplifies the work of connecting the conductors and the effect that the bus duct can be made compact in combination with the fact that the different phases are separated by the insulating partition plate.

[Brief description of drawings]

FIG. 1 is a plan view of a bus duct connecting device according to the present invention.

FIG. 2 is a vertical sectional front view taken along the line AA of FIG.

FIG. 3 is a vertical sectional front view taken along the line BB of FIG.

FIG. 4A is a front view of a double-headed bolt, and FIG. 4B is a vertical sectional front view of a double-headed nut.

[Explanation of symbols]

 1 Duct 2/3 4 Insulated conductor 5/6/7 Insulation support member 8 Patch plate 9/10 Fastening parts 11 Insulation partition plate 12 Beam member 13 Slit

Claims (1)

[Scope of utility model registration request] 1. In a bus duct in which a plurality of phases of insulated conductors are arranged in parallel in a duct, overlapping portions of portions of the conductors whose insulating coatings are removed or portions of the conductors whose insulating coatings are removed are butted against each other. Secure the overlapped part of the conductor and the backing plate with a fastening part with a display part that allows you to visually check the completion and completion of tightening, between adjacent conductor connection points, and between conductor connection points and the duct side. A connecting device for a bus duct in which an insulating partition plate is arranged between the plates.