JPS5911433Y2 - arcing horn - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an arcing horn, and more specifically, to an arcing horn that shunts abnormal voltage generated in power transmission and distribution lines of electrical equipment.

Generally, when an abnormal voltage occurs in a power transmission/distribution line such as a transformer or a circuit breaker, the abnormal voltage is shunted out using an arcing horn to protect the equipment.

Figure 1 is a diagram showing an example of the structure of a conventional arching horn.
Connect the charging side horn 3 to the charging pole 2 of the bushing 1 attached to the equipment, and install the grounding side horn 4 facing the charging side horn 3 while keeping an appropriate distance to prevent abnormal voltage between both horns 3 and 4. Alternatively, although not shown, the abnormal voltage can be discharged by providing a ground-side horn 4 at an appropriate distance from the charging pole 2 itself.

In this case, as shown in FIG. 2, an insulating bar 5 is attached to the charging pole 2, and the part of the insulating cover 5 facing the grounding horn 4 is opened and brought into close contact with the charging horn 3. There is a device that prevents danger by extending the tip of the opening downward from the tip of the charging side horn 3 and covering the charging portion with an insulating cover 5.

However, even if the conventional example shown in FIG. Since a conductive path A is formed which is directly connected to each pole 2, the charged portion is in the same exposed state as shown in FIG.

For this reason, even if no abnormal voltage is occurring on the line,
If a bird or the like approaches between both horns, a flashover may occur, which may have a negative impact on the line.

In view of these problems, the present invention aims to provide an arcing horn that can prevent flashover from occurring even if a bird or the like approaches between both horns when no abnormal voltage is occurring on the line. It is.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 and 4.

FIG. 3 is a diagram showing a first embodiment embodying the present invention.

In the present invention, the insulating cover 5 is shaped so that the conductive path A formed by the flashover is not directly connected to the live parts, thereby making it possible to prevent bird damage.

That is, to explain in an embodiment, the insulating cover 5 covers the charging pole and the tip 3 of the charging side horn 3, as shown in FIG.
A space wall part 51 is formed which is in close contact with the ground side horn 4 and is separated from the tip part 31 by an appropriate spatial distance, and an opening facing the ground side horn 4 is formed in the bottom wall 52 of the space wall part 51. 5
3 will be provided.

The distance between the space wall portion 51 and the charging side horn 3 may be such that it will not cause a flashover within the normal voltage range, and the opening portion 53 may have a size that does not impede a flashover between the horns 3 and 4. belongs to.

FIG. 4 is a diagram showing another embodiment of the present invention.

In this embodiment, an insulating cover 5' is formed over the entire charging side horn 3 and spaced apart from each other by a spatial distance.
A capillary opening 54 shaped like a small diameter tube is provided at the lower end of the tube.

In the embodiment, the structure is as described above, so that when a spark occurs between the charging side horn 3 and the grounding side horn 4, the inner wall of the opening 53 of the insulating covers 5 and 5' or the capillary opening 54 becomes a discharge path. However, since the space wall 51 and the insulating cover 5', which maintain a spatial distance from the charging side horn 3, are spatially insulated, the conductive path A is formed in the part B in the figure. will no longer take shape.

Therefore, since the conductive path A and the tip portion 31 of the charging side horn are disconnected, the conductive path A can be insulated from the charging side horn 3 within the normal voltage range.

As described above, the present invention includes an insulating cover that has a space wall spaced apart from at least the tip of the charging side horn and has a shape that hides the charging side horn and the charging pole. , an opening facing the grounding side horn was provided in the space wall of the insulating cover so that the conductive path formed in the opening and the charging side horn could be insulated. It is possible to prevent a flashover from occurring when a bird etc. approaches, and the charging pole and charging side horn are hidden with an insulating cover, ensuring safety as the charging part is not exposed. effective.

If the insulating cover of the present invention is made of a material with high tracking resistance (for example, EPM, porcelain, etc.), safety can be further improved.

Furthermore, since the tip of the arcing horn is curved downward, water from rain, snow, etc. can easily fall off, improving insulation properties.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of the structure of a conventional arcing horn, Fig. 2 is an explanatory sectional view showing a conventional insulating cover attached to the arcing horn, and Fig. 3 shows a first embodiment of the present invention. 4 is a sectional view showing a second embodiment of the present invention. 2... Charging pole, 3... Charging side horn, 4... Grounding side horn, 5, 5'... Insulating cover, 51... Space wall, 53... Opening.

Claims (1)

[Scope of utility model registration request] A charging side horn is connected to the charging terminal of the power transmission and distribution path of the electrical equipment, and a grounding side horn is installed opposite to the charging side horn,
In the arcing horn that connects the grounding side horn and the charging side horn, the charging side horn has a downwardly curved shape, and there is an air gap separated from at least the tip of the charging side horn by a spatial distance. an insulating bar having a shape that hides the charging side horn and the charging electrode, and providing an opening facing the grounding side horn at the lower end of the space wall of the insulating cover. Arching horn featuring.