JPH0714539U - High voltage cutout with built-in lightning protection element with external gap - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Insulation of the charging side electrode of the lightning protection element and connection of the lead wire with the fuse can be done easily and surely, and insulation and sealing of the ground side electrode can be done reliably and easily. To do. A lead wire 23 drawn from a load side of a fuse accommodated in a fuse accommodating portion 2 having an opening at the bottom inside a cylindrical insulator 1 is accommodated in a lightning protection element accommodating portion 3 via an elastic filler on an upper portion. It is connected to the upper charging portion side electrode 22 of the lightning protection device. The ground-side electrode 25 provided below the lightning protection element via the built-in gap is covered with a flexible cover 28 inserted into the lower portion of the opening of the lightning protection element housing. This cover is provided with a collar piece 29 that hermetically covers the lower edge of the insulator, and the flashing corner portion 26 of the ground-side electrode of the lightning protection element can be seen through the window portion 31 provided between the collar piece and the lower edge of the insulator. The discharge part 30 is movably mounted on a discharge part mounting plate 33 provided at the lower part of the support metal fitting 10, and an external gap 35 formed between the discharge part 30 and the flashing corner part 26 of the ground side electrode is formed. The interval can be adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a high voltage cutout with a lightning protection element with an external gap, and more particularly, to a high voltage cutout with a lightning protection element with an external gap used as a primary side protection device for a pole transformer of a high voltage distribution line in a lightning damage area.

[0002]

[Prior art]

 Conventionally, a high voltage cutout with a built-in lightning protection element has been used as a primary side protection device for pole transformers of high voltage distribution lines, especially in areas where there are many lightning strikes.

Such a high-voltage cutout with a built-in lightning protection element generally has a fuse body housed in a porcelain body and an insulator, and a lightning protection element housed in the insulator. , The fuse and the lightning protection element were connected by a predetermined lead wire.

[0004]

[Problems to be solved by the device]

 However, the conventional structure has a complicated structure, the connection and insulation of the lead wires are troublesome, and it is difficult to securely seal the lightning protection element housing part, and fixing the lightning protection element is also troublesome. However, the work using adhesives has a difficulty in workability.

In view of the above, the present invention solves the above-mentioned drawbacks of the prior art, makes it easier and more reliable to insulate the charging side electrode of the lightning protection element and to connect the fuse and the lead wire, and to ensure the insulation and sealing of the ground side electrode. -The purpose is to provide a high-voltage cutout with a lightning protection element with an external gap that can be easily implemented.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, a high voltage cutout with a lightning protection element with an external gap according to the present invention is provided with a lightning protection element storage section in parallel with a fuse storage section with a downward opening in a cylindrical insulator. Connect the lead wire drawn from the load side of the housed fuse to the connection part on the upper charging part side of the lightning protection device housed in the lightning protection device housing, and connect the lightning protection device to the upper part of the lightning protection device via an elastic filler. Store in the lightning protection element storage section. Further, the ground-side electrode provided under the lightning protection element through the built-in gap is covered with a flexible cover inserted into the lower part of the opening of the lightning protection element housing, and the cover covers the lower edge of the insulator. A piece is provided, and the lower part of the opening of the lightning protection element housing portion is sealed with the flange piece. Then, through the window provided between the brim piece and the lower edge of the insulator, the flashover corner of the ground-side electrode of the lightning protection element is made to be visible, and the cylindrical insulator is supported and fixed to the armor of the utility pole. A discharge part mounting plate is provided below the supporting metal fitting for moving the discharge part, and the discharge part is movably mounted on the discharge part mounting plate, and the discharge part mounting plate is formed between the discharge part and the flashing corner of the ground side electrode. The feature is that the interval of the external gap can be adjusted.

[0007]

[Work]

 The high-voltage cutout with an external gap and built-in lightning protection device can use an insulator with a simple structure, and the lead wire between the fuse and the lightning protection device can be easily connected.

Further, the lower ground side electrode portion of the lightning protection element is sealed by a flexible cover, and the flashover corner portion can be seen through the window portion provided between the cover and the lower edge of the insulator. The gap can also be formed accurately.

Further, a discharge part mounting plate is provided at a lower portion of a supporting metal member for supporting the cylindrical insulator and fixing it to the armrest of the electric pole, and the discharge part is movably mounted to the discharge part mounting plate. Since the distance between the external gap formed between the discharge portion and the flashover corner portion of the ground side electrode can be adjusted, the distance between the external gaps can be easily adjusted to a length such that stable discharge characteristics can be obtained. Can be set accurately.

[0010]

【Example】

 Hereinafter, the present invention will be described in more detail based on an embodiment shown in the drawings. FIG. 1 is a vertical sectional view showing an embodiment of a high voltage cutout with a lightning protection element with an external gap according to the present invention, FIG. 2 is a side view of the lightning protection element viewed from the ground side electrode side, and FIG. Fig. 4 is a plan view of the high-voltage cutout, Fig. 5 is a bottom view of the high-voltage cutout, and Fig. 6 shows a flexible cover that closes the lower opening of the lightning protection element housing. ) Is a side view, (B) is a sectional view taken along line XX, and (C) is a bottom view.

As shown in FIGS. 1 to 5, the high-voltage cutout with a lightning protection element with an external gap according to the present embodiment has a fuse housing portion having an opening at the bottom inside a ceramic insulator 1 formed in a cylindrical shape. 2 and the lightning protection element housing 3 are provided in parallel with their axes parallel to each other, and the fuse cylinder 4 and the lightning protection element 5 are housed in both housings 2 and 3, respectively.

The insulator 1 on the side of the fuse housing 2 is provided with an upper wire connecting terminal 7 to which an electric wire 6 on the input side is connected, and an electric wire 8 on the load side is connected to a lower side of the insulator 1 on the upper side thereof. A lower wire connecting terminal 9 is provided, and a mounting portion 11 for a support metal fitting 10 for fixing a high voltage cutout with a built-in lightning protection element with an external gap to a wire pole of a utility pole or the like is formed in a body portion.

The fuse tube portion 4 housed in the fuse housing portion 2 has a structure substantially similar to that conventionally used, and an upper contact 13 is connected to a tulip-shaped upper fixed electrode 12. The lower contact 16 is connected to the lower fixed electrode 17 via the arc extinguishing cylinder 14 and the fuse cylinder 15. The lower fixed electrode 17 is provided with a fuse 18 mounted in the fuse cylinder 15 and a conductive plate 19 connected to the lower wire connection terminal 9.

Further, a lower cover 20 made of synthetic resin for closing the lower opening of the fuse housing 2 is attached to the lower opening, and the lower opening of the lower cover 20 has a stopper 21. Is detachably attached.

On the other hand, in the lightning protection element 5 housed in the lightning protection element housing part 3, the charging part side electrode 22 on the upper part thereof is connected to the lower fixed electrode 17 on the load side of the fuse via the lead wire 23. In addition, the ground-side electrode 25 provided on the lower portion through the built-in gap 24 is provided with the flashover corner portion 26.

The lightning protection element 5 is inserted into the lightning protection element storage section 3 with an elastic filler 27 interposed between the lightning protection element storage section 3 and the ceiling portion of the lightning protection element storage section 3, and the lower portion of the lightning protection element storage section 3 is formed. It is covered with a cylindrical flexible cover 28 that is inserted into the lower portion of the opening.

As shown in detail in FIGS. 6 (A), (B), and (C), the flexible cover 28 has a brim piece 29 covering the lower edge of the insulator 1 at the lower end thereof. A window portion 31 is provided in a portion corresponding to the flashover corner portion 26 so that the flashover corner portion 26 can be seen from the discharge portion 30. Further, at a position facing the window portion 31, a step portion 32 that engages with the lower cover 20 is provided by cutting out a part of the collar piece 29 in an arc shape. It is designed to prevent removal.

The discharge part 30 is provided on the support metal fitting 10 for fixing the high-voltage cutout with a built-in lightning protection element with an external gap to a wire arm of a utility pole, and is provided below the support metal fitting 10. It is attached to the discharge part mounting plate 33 by a bolt and nut 34 so that the interval of an external gap 35 formed between the tip of the discharge part 30 and the flashover corner part 26 can be adjusted. The length of the interval of 35 can be adjusted so that stable discharge characteristics can be obtained.

By forming the lightning protection element built-in high voltage cutout with the external gap in this way, the insulator 1 having a simple shape can be used, and the fuse cylinder portion 4 and the lightning protection element 5 can be easily inserted and mounted. Is possible.

Further, it is possible to easily connect the lead wire 23 that connects the charging portion side electrode 22 on the upper portion of the lightning protection element and the lower fixed electrode 17 on the load side of the fuse. Furthermore, since the elastic filler 27 is filled on the upper portion of the lightning protection element 5, it is possible to securely insulate and fix this portion.

In particular, since the lower portion of the lightning protection element 5 is covered with the flexible cover 28, it is possible to reliably prevent the entry of rainwater and the like, and the pressure increase in the case at the time of element failure can be prevented by the elastic deformation of the cover 28. Can be released.

[0022]

[Effect of device]

 As described above, the high-voltage cutout with built-in lightning protection element with an external gap of the present invention has fuses and lightning protection elements inserted and mounted in the fuse storage section and the lightning protection element storage section formed in parallel in the cylindrical insulator, respectively. , Connect the lead wire pulled out from the load side of the fuse to the connection part on the upper charging part side of the lightning protection device, and store the lightning protection device in the lightning protection device housing via an elastic filling material. It is covered with a flexible cover that has a window that allows you to look into it, and the bottom of the opening of the lightning protection element storage section is sealed with a cover brim piece. Insulation and fixing of the electrodes can be performed reliably and easily, and insulation and sealing of the ground side electrode are reliable and easy, which can reduce the manufacturing cost.

Further, by covering the lower portion of the lightning protection element housing portion with the flexible cover, even if the internal pressure rises when the element fails, the flexible cover can be deformed to release the pressure.

Further, a discharge part mounting plate is provided below a supporting metal member for supporting the cylindrical insulator and fixing it to the arm pole of the electric pole, and the discharge part is movably mounted on the discharge part mounting plate. Since the interval of the external gap formed between the contact part and the flashover corner of the ground electrode can be adjusted, it is easy and accurate to set the interval of the external gap to a length that provides stable discharge characteristics. You can

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a high voltage cutout with a built-in lightning protection device with an external gap according to the present invention.

FIG. 2 is a side view of the lightning protection device as viewed from the ground electrode side.

FIG. 3 is a side view of the same as seen from the fuse housing portion side.

FIG. 4 is a plan view of the same.

FIG. 5 is a bottom view of the same.

6A and 6B also show a flexible cover that closes the lower opening of the lightning protection element housing portion, in which FIG. 6A is a side view, FIG. is there.

[Explanation of symbols]

 1 Insulator 2 Fuse storage part 3 Lightning protection element storage part 4 Fuse cylinder part 5 Lightning protection device 7 Upper wire connection terminal 9 Lower wire connection terminal 10 Supporting metal fitting 12 Upper fixed electrode 13 Upper contact point 14 Arc extinguishing tube 15 Fuse tube 16 Lower contact point 17 Lower part Fixed electrode 18 Fuse 20 Lower cover 21 Sealing plug 22 Charging part side electrode 23 Lead wire 24 Built-in gap 25 Grounding side electrode 26 Flashing corner part 27 Elastic filler 28 Flexible cover 29 Collar piece 30 Discharging part 31 Window part 33 Discharging Part mounting plate 35 External gap

Claims (1)

[Scope of utility model registration request] 1. A lightning protection element storage portion and a fuse storage portion having a downward opening are provided in parallel in a cylindrical insulator, and a lead wire drawn from a load side of a fuse stored in the fuse storage portion is connected to the lightning protection element. The lightning protection device is connected to the connection part on the upper charging part side of the lightning protection device housed in the device housing part, and the lightning protection device is housed in the lightning protection device housing part with an elastic filler on the upper part thereof, and also through the built-in gap. The ground side electrode provided in the lower part of the element is covered with a flexible cover which is inserted into the lower part of the opening of the lightning protection element housing part, and the cover is provided with a collar piece for covering the lower edge of the insulator. Seal the lower opening of the lightning protection element housing, and let the flashing corner of the ground side electrode of the lightning protection element look through the window provided between the collar piece and the lower edge of the insulator. Support metal fittings for supporting and fixing to the pole of the utility pole A discharge part mounting plate is provided at the bottom of the discharge part, and the discharge part is movably mounted on the discharge part mounting plate, and an interval of an external gap formed between the discharge part and the flash corner of the ground side electrode is set. Adjustable high-voltage cutout with built-in lightning protection element with external gap.