JPH07240133A - Safety device of high voltage switch - Google Patents

Abstract

PURPOSE:To enhance the safety at the maintenance inspection work of the whole high voltage receiving facilities to protect precious human life, and further prevent the short-circuit accident by intrusion of small animal to eliminate a wide-range service interrupting accident by mounting a safety cover on a high voltage switch such as a load breaker switch or disconnector. CONSTITUTION:A base 1 is mounted on a rack together with a switch such as a load breaker switch (LBS) or disconnector (DS), a square frame-like case body 2 formed from an insulating material is screwed to the base to vertically and laterally cover the switch, and the front opening part is covered with an easily attachable and detachable front cover 3. In case of a plurality of switches, a separator 4 is inserted into the case body 2, whereby the switches can be mutually separated. Wire leading part 2a are deeply cut in required positions on the rear end edge parts of the upper and lower surfaces of the case body 2, so that the case body 2 can be easily attached and detached after a wire is joined. When a clearance is large after the wire is lead out to the cable leading part 2a, a wire leading part cover 5 is installed, and the clearance is shielded thereby to prevent intrusion of small animal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to high-voltage power receiving equipment,
In particular, a safety cover is installed on a high-voltage load switch (load break switch, abbreviated as LBS below), disconnector (discomputer, abbreviated as DS below), etc. to maintain power receiving equipment.
The present invention relates to a safety device that allows an operator to perform work without causing an electric shock accident during inspection and repair. Install a safety cover and receive power

[0002]

2. Description of the Related Art A high-voltage power receiving facility is obliged to carry out a periodical detailed inspection and a monthly regular inspection, and in addition, it is common to perform a voluntary periodic inspection in the gap.
This inspection work is dangerous because the target is high-voltage equipment, and despite various considerations,
There are still constant casualties from contact accidents. In addition, not only damage to power receiving equipment due to invasion of small animals but also widespread blackout of distribution lines has a great impact on society.

In order to prevent the above-mentioned contact accident, a cover of a device has been conventionally considered, for example, an actual flat plate 4-2304.
In the one disclosed in Japanese Patent Publication No. 6, the upper ends of the locking pieces 62, 62a are hingedly attached to the front opening and the rear opening of the protective cover, respectively. Further, in Japanese Utility Model Laid-Open No. 63-105247, a pipe having a peephole in the top plate of the cover, escape holes formed in front and rear sides of both side plates of the cover, and a constricted portion in the center of both side plates. A fuse cover is disclosed.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the technique disclosed in Japanese Patent No. 046, it is necessary to open the locking pieces 62, 62a every time the fuse is replaced or inspected. Moreover, one end of the locking pieces 62, 62a is attached to the protective cover in a hinge-like shape, which has a drawback that it interferes with the work. In addition, the actual exploitation Sho 63-105247
In the one disclosed in the publication, this fuse cover has a drawback that it cannot be used as a safety device for a high-voltage power distribution switch because it has a peep hole and a clearance hole in the upper plate and both side plates.

The present invention solves the above-mentioned drawbacks and further provides a safety device for a high-voltage switch which not only prevents accidental contact by an operator but also prevents short-circuit accidents due to invasion of small animals such as mice and snakes. It is intended to be provided.

[0006]

According to the present invention, the above-mentioned problem is a frame body which is formed of an insulating material such as plastic and a base to which a switch is attached, and which has front and rear surfaces opened, and which has four upper, lower, left and right sides. Formed by an insulating material such as a plastic, etc., with a surface covering the depth direction of the switch attached to the base, the rear surface being attachable to and detachable from the base, and having a notch for drawing out an electric wire at the rear end edge. A high-voltage switch safety device is provided, which comprises a front cover that covers an opening on the front surface of the case body and that can be opened and closed as a lid for the case body.

Further, in the above paragraph, in the case where a plurality of switches are arranged in parallel, the problem is solved by forming an insulating material such as plastic between them and partitioning them by a detachable separator with respect to the case body. To be done.

Further, in the preceding paragraph and the preceding two paragraphs, by forming the front cover with a transparent material, a safer and more useful safety device for the high-voltage switch can be obtained.

Further, in any of the above-mentioned 3 items, by detachably providing an electric wire lead-out portion cover which shields a residual space in which the electric wire is drawn in the notch for drawing the electric wire, inadvertent intrusion of a small animal or the like. Can be prevented, and the above problems can be solved.

Further, in the case of any of the above four items,
The above problem can be solved when the LBS is used as the switch.

When the switch is an open type DS which is characterized by the installation location, the front cover is made of a transparent material, and a handle for engaging a hook or the like is provided on the front surface of the switch. The above problem can be solved by connecting the lower edge portion of the front cover to the lower edge portion of the case body by a hinge means.

[0012]

Since the case body and the front cover cover the upper, lower, left, right and front surfaces of the switch and the front surface, the operator is prevented from accidentally touching the high voltage charging section during inspection work or the like. Since the front cover can be easily attached to and detached from the case body, internal operations and the like are easy. The notch for pulling out the electric wire provided on the rear end edge of the case body facilitates removal of the case body with the switch attached to the base.

Further, when a plurality of switches are arranged in parallel, the separator that separates the switches from each other and can be attached to and detached from the case body can be easily attached and removed by removing the separator when screwing the fuse. As a result, the mutual influence of the switches can be eliminated.

Furthermore, the front cover made of a transparent material makes it easier to observe and inspect the inside. In addition, the detachable electric wire lead-out portion cover that shields the remaining voids arranged by pulling the electric wire into the notch for drawing the electric wire prevents accidental intrusion of small animals and the like to prevent a short circuit accident and a ground fault.

When the switch is an open type DS,
The front cover made of transparent material, the handle that engages the hooks provided on the front surface of the front cover, and the hinge means that connects the lower edge of the front cover to the lower edge of the case body are installed in special places such as high places. Make sure that the work of disconnecting the disconnector, which is often installed, is easy.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 and FIG. 2 show a schematic state in which the device of the present invention is applied to an LBS. FIG. 1 is a front view and FIG. 2 is a side view. In the figure, reference numeral 1 is a base, 2 is a case body, and 3 is a front cover, and these three members generally cover the outside of the LBS. Details will be described below with reference to perspective views of the respective parts in FIG.

The base 1 is formed of a metal plate such as an iron plate, and
Then, a flat portion 1a for attaching the LBS main body (not shown) together with the base 1 to a predetermined place such as a rack of power receiving equipment has an LBS mounting hole 1b in the same portion and a predetermined number depending on the number of installed LBSs. The flat portion 1a is provided with a predetermined dimension at right angles with the three edges of the flat portion 1a as the edge portions 1c,
A plurality of screw holes 1e are provided in the edge portion 1c to serve as a mounting means for a case body 2 which will be described later, and the other one in the side surface direction is an open portion 1d having no edge portion. Open part 1d without the edge
Is a space required for operating the lever for manually opening the LBS. A small hole for heat dissipation is provided in the flat portion 1a (not shown).

The case body 2 is made of arc-resistant plastic material, rubber material, or the like, and is transparent, semi-transparent, or non-transparent depending on the application. Edge 1c of the base 1
It is a frame-shaped body that can be fitted to the outside of the
Corresponds to the depth dimension of S. On the upper and lower surfaces of the four-sided frame, there are three lead-out portions 2a of the electric wire, which are deeply cut forward from the trailing edge, because the LBS number is 3 in this embodiment, and therefore three locations are provided. A plurality of holes 2e near the rear end of the case body 2 are mounting holes corresponding to the same portion 1e for attaching to the edge portion 1c of the base 1, and the case body 2
The plurality of holes 2f near the front edge are screw holes for attaching the front cover 3 described later. Further, a large number of small holes 2g for heat dissipation are provided on each surface (only a part is shown).

A notch 2d is formed on one side wall of the case body 2.
Is provided. Although it is provided on the right side wall in this embodiment, it may be changed depending on the LBS used. This is a space necessary for operating the lever for manually opening the LBS, like the open portion of the base 1 without an edge portion, but the minimum necessary cutout dimension is to reduce the open space to the outside as much as possible.

A rail-shaped separator mounting portion provided with grooves on the inner surfaces of the frame-shaped upper and lower surfaces of the four sides of the case body 2 into which the separators 4 described below for separating the three LBSs from each other are fitted. 2b are formed integrally with the case main body 2 and are formed at two places respectively on the upper and lower sides and over substantially the entire depth of the case main body 2. Similar to the case body 2, the separator 4 is made of a plastic material having arc resistance and may be transparent, semi-transparent, or non-transparent depending on the application, and has a rectangular non-perforated flat plate shape and has a separator mounting portion 2b. It has a thickness that allows it to be inserted into the groove dimension with an appropriate degree of fitting.

Like the case body 2, the front cover 3 is also made of arc-resistant plastic material and may be transparent, semi-transparent, or non-transparent depending on the application, but by being made of a transparent material, The internal inspection becomes simpler. It is in a lid state having an edge 3a raised at a right angle that can be fitted to the outside of the frame of the case body 2, and the edge 3a has a plurality of screw holes 2f near the front edge of the case body 2. It has a plurality of mounting holes 3f for mounting to. Further, a large number of small holes 3g for heat dissipation are provided on the entire surface (only a part is shown).

Reference numeral 5 is a wire lead-out portion cover. It is formed of an insulating material such as a plastic material and has a T-shaped cross section with a short vertical image. The vertical dimension of the vertical portion 5a is about the same as the thickness of the case body 2 and the width of the wire is the same. Drawer 2
It is configured so that it fits slightly tightly with respect to the width dimension of a,
The longitudinal dimension is set to be slightly shorter than the dimension of the electric wire drawing portion 2a in the same direction, and the electric wire is inserted into the remaining space where the electric wire is drawn from the electric wire drawing portion 2a to shield the gap.

The apparatus of the present invention configured as described above is
First, using the plurality of LBS mounting holes 1b of the base 1,
The BS and the base 1 are simultaneously attached to the equipment body (not shown). Then, an electric wire (not shown) is also joined to a predetermined portion of the LBS on each of the input side and the output side, and then the rear end of the case body 2 is put on the edge 1c of the base 1 so that the electric wire pull-out portion 2a is formed. Place the electric wire on the
A plurality of holes 2e at the rear end of the case body 2 are formed in the edge portion 1 of the base 1.
Align with the screw hole 1e of c and screw.

Further, the separator 4 is inserted into the separator mounting portion 2b of the case body 2 and placed at a predetermined position.
Since there are three LBSs in this embodiment, two separators 4 are required. Then, the front cover 3 is attached to the case body 2
Then, the case body 2 is fitted so as to cover the front edge thereof, and the screw hole 2f of the front edge of the case body 2 and the mounting hole 3f of the entire surface cover 3 are aligned with each other and fixed by screwing.

Since the electric wire has already been drawn out from the electric wire drawing portion 2a of the case main body 2, observe the state,
If there is a large gap in the same portion, the vertical drawing portion 5a is fitted into the wire lead-out portion 2a by using the above-mentioned wire lead-out portion cover 5 to shield the gap. As described above, the vertical image section 5
Since "a" is configured to fit the electric wire drawing portion 2a with a slight tight fit, it will not fall off. The fitting of the electric wire drawing portion cover 5 to the electric wire drawing portion 2a on the lower surface of the case body 2 is performed from the inner surface of the case body 2 so that the same member can be prevented from falling off. In some cases, the wire lead-out portion cover may be fixed with screws or adhesive tape.

Since it is constructed and arranged as described above, by covering the LBS, there is no direct contact from the outside,
Further, the space opened to the outside is very small, and moreover, the space necessary for operating the lever for manually opening the LBS is also provided, so that the operation is not hindered.

In the above embodiment, the full-face cover 3 is screwed, but by changing the structure of the edge portion 3a of the whole-face cover 3 so as to have elasticity, no screw is used and only fitting is performed. It can also be configured. By doing so, operations such as internal inspection and replacement of parts become easier.

FIG. 4 shows another embodiment of the wire drawing portion cover 5. The one shown in the figure is an electric wire lead-out portion cover 15 that collectively covers the three electric wire lead-out portions 2a provided on the case body 2. The electric wire lead-out portion cover 15 has a shape in which three electric wire lead-out portion covers 5 are arranged side by side and connected together. Yes, the three projecting portions 15a projecting downward are fitted to the three wire lead-out portions 2a. When the number of electric wires is the same for each electric wire drawing portion, use of the electric wire drawing portion cover 15 is effective.

FIG. 5 shows another embodiment of the present invention. In the above-described embodiment, the wire lead-out portion cover 5 is configured to cover the space for each wire, but the one shown in FIG. 5 has a wide wire for the plurality of wires at the rear end of the case body 22. The lead-out portion 22a is formed as an opening, an electric wire (not shown) is drawn out from the opening, and then the electric wire lead-out portion cover 25 is used to cover the gap. That is, the wire lead-out portion cover 25 has a size sufficient to cover the wide wire lead-out portion 12a and has a required number of small cutouts 25a.
The electric wire is arranged so as to be pulled out from 5a, and then the mounting hole 25b and the screw hole 22b of the case body 22 are aligned and fixed with a screw. This device is also effective when the number of electric wires is the same for each LBS. The configurations of the case main body 22 and the wire lead-out portion cover 25 are the same as those of the first embodiment except for the above-mentioned contents, and therefore the description thereof is omitted.

In the above-described embodiments for the LBS, all the LBSs are collectively covered. However, it is also possible to improve the degree of freedom of use by individually providing a cover for each LBS. Is.

Further, a plurality of LBSs are separated from each other by a separator.

FIGS. 6 and 7 show an embodiment of the present invention corresponding to DS, which corresponds to a single DS. Since many parts have the same structure as that for the above-mentioned LBS, only the different parts will be described.

Although not shown, the base is formed of a metal plate such as an iron plate, and is provided on a flat portion for attaching the DS main body together with the base to a predetermined place such as a rack of power receiving equipment, a peripheral edge portion, and an edge portion. The screw holes are similar to those for the above-mentioned LBS.

The case body 31 is made of arc-resistant plastic material and is transparent, semi-transparent, or non-transparent depending on the application. It is a frame-like body that can be fitted to the outside of the edge of the base, and its depth dimension corresponds to the depth dimension of DS. An electric wire lead-out portion 31a, which is deeply cut forward from the rear end, is provided on each of the four-sided frame-shaped upper surface and lower surface.
It has a place. The plurality of holes 31b near the rear end of the case body 31 are mounting holes corresponding to the same portion for mounting to the edge portion of the base.

DS is generally installed in a high place,
It is often a place where it is difficult to work, such as facing down or tilting. Therefore, it is necessary that at least the front cover can be easily removed in consideration of cases such as inspection. Like the case body 31, the front cover 32 in the present invention is made of arc-resistant plastic material and may be transparent, semi-transparent, or non-transparent depending on the application, but a transparent material is generally desirable. . Then, it is formed as a plate capable of covering the frame-shaped front opening of the case body 32, and its lower edge is rotatably attached to the lower edge of the front opening of the case body 31 by a hinge member 33. Has been.

An arcuate handle 34 is attached to the upper part of the front surface of the front cover 32 and has a long handle in the arcuate part in case it is installed in a high place as described above. The front cover 32 can be opened and closed from a distant position by inserting and operating a hook or the like.

The apparatus of the present invention constructed as described above is
First, a base (not shown) and a DS are simultaneously attached to the equipment body. Then, an electric wire, which is also not shown, is jointed to a predetermined portion of the DS on each of the input side and the output side, and then the rear end of the case main body 32 is arranged on the electric wire pull-out portion 31a while the electric wire is arranged on the edge of the base. Fit so that it covers the part,
A plurality of holes 31b at the rear end of the case main body 32 are matched with screw holes at the edge of the base and screwed.

The upper end 32c of the front cover 32 has an arcuate cross section as shown in FIG. 7, and when the front cover 32 is rotated and closed, this portion is a circle provided on the lower surface of the upper front portion of the case body 31. It fits into the arc-shaped recess 31c and is locked and closed.

Since the electric wire has already been drawn out from the electric wire drawing portion 2a of the case main body 2, observe in this state,
If there is a large gap in the same part, the above-mentioned point is also used to shield the gap by using a wire drawing part cover not shown.
It is similar to the case of BS.

Since the device is constructed and arranged as described above, it does not come into direct contact with the outside by covering the DS, and the gap open to the outside is very small. Further, the front cover is rotated by the hinge. Since it opens and closes, it does not interfere with the operation even when installed in high places.

When a plurality of DSs are installed, a plurality of Ds are provided on the inner surface side of the upper and lower surfaces of the frame-like four surfaces of the case body, although not shown, as in the case of the LBS described above.
It is also possible to provide a rail-shaped separator mounting portion provided with a groove into which a separator for separating the S's from each other is fitted, and separately prepare and insert the separator.

Also, a fixing means for the electric wire drawing portion cover, D
The invention can be applied to the wide structure of the wire lead-out portion of the case main body and the plurality of collective mounting means of the same cover in the case of a plurality of S, as in the case of the LBS already described.

[0043]

As described above, according to the present invention, LBS,
It is possible to prevent accidental injury or injury to maintenance / inspection workers without accidentally touching the charged parts of high-voltage switches such as DS. Moreover, since the front cover is a separate body that can be easily attached and detached, it is easy to inspect the inside and the like. If the front cover is made of a transparent material, the above-mentioned work is further simplified. Also,
When there are a plurality of switches, it is possible to prevent the influence between the switches without hindering the work by partitioning them with a separator that is easy to insert and remove. Further, since the detachable wire lead-out portion cover is provided to shield the remaining space in which the electric wire is drawn in the notch for drawing out the electric wire, it is possible to prevent an accidental intrusion of a small animal or the like and prevent a short circuit accident.

When the switch is an open type DS,
The front cover made of transparent material, the handle that engages the hooks provided on the front surface of the front cover, and the hinge means that connects the lower edge of the front cover to the lower edge of the case body are installed in special places such as high places. This has the effect of making sure the inspection work of the DS that is often installed is easy.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment in which the present invention is applied to an LBS.

FIG. 2 is a side view of an embodiment in which the present invention is applied to LBS.

FIG. 3 is a perspective view in which the elements of the present invention are arranged in the order of assembly.

FIG. 4 is a perspective view of another embodiment of the wire lead-out portion of the present invention.

FIG. 5 is a perspective view of still another embodiment of the wire lead-out portion of the present invention.

FIG. 6 is a perspective view of an embodiment in which the present invention is applied to DS.

FIG. 7 is a perspective view of an embodiment in which the present invention is applied to DS.

[Explanation of symbols]

 1 Base 2 Case Body 2a Wire Drawout 2b Separator Attachment 3 Front Cover 4 Separator 5 Wire Drawout Cover 15 Wire Drawer Cover 22 Case Body 22a Wire Drawer 25 Wire Drawer Cover 31 Case Body 31a Wire Drawer 32 Front Cover 33 Hinge 34 Handle

Claims (6)

[Claims] 1. A base to which a switch is attached, and a frame-like body formed of an insulating material such as plastic and having front and rear surfaces opened, and the depth direction of the switch attached to the base is defined by four sides of up, down, left and right. A case main body having a cover, a rear surface of which is attachable to and detachable from the base, and a notch for drawing out an electric wire at a rear end edge, and an insulating material such as plastic, which covers an opening on the front surface of the case main body. A safety device for a high-voltage switch, comprising: a front cover that can be opened and closed as a lid for the case body. 2. A switch according to claim 1, wherein a plurality of the switches are arranged in parallel, and a space between them is formed of an insulating material such as plastic and is partitioned by a separator that is attachable to and detachable from the case body. High-voltage switch safety device described. 3. The safety device for a high voltage switch according to claim 1, wherein the front cover is made of a transparent material. 4. An electric wire pull-out portion cover for removably covering the remaining space, in which the electric wire is drawn into the electric wire drawing notch, is detachably provided.
The safety device for a high-voltage switch according to items 2 and 3. 5. The safety device for a high voltage switch according to claim 1, wherein the switch is a high voltage load switch. 6. The switch is an open-type disconnector, the front cover is formed of a transparent material, and a handle for engaging a hook or the like is provided on the front surface thereof, and the lower edge of the front cover is The safety device for a high-voltage switch according to claim 1, wherein the safety device is connected to a lower edge portion of the case body by a hinge means.