JPH0431726Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a cutout with an arrester.

(Prior art) There are various types of cut-outs with built-in arresters.For example, because the cable head is directly connected, there are cut-outs in which the arrester is stored on the load side by inflating the lower part of the insulator body, and cut-outs in which the arrester is stored vertically inside the insulator body. It has an arrester storage area and a fuse cylinder storage area.

(Problems to be solved by the invention) However, since these conventional insulators have a built-in arrester, the insulator body is correspondingly large, and the shape of the insulator body is changed due to the provision of an arrester storage section and a fuse tube storage section inside. This is complicated and inconvenient in manufacturing and handling.

(Means for solving the problem) Therefore, this idea includes only a fuse tube built into the insulator body, and an arrester built into the stress cone that covers the power supply side lead wire lead-out section provided on the outside of the insulator body. The arrester is connected to the power supply side through the outer conductive layer of the stress cone.

The specific structure is that an upper electrode connected to the power outlet wire is provided on the upper part of the insulator body with a built-in fuse tube inside, and a lower electrode connected to the load side outlet wire is provided at the bottom. Each of the electrodes is connected to the fuse tube, a cover covering the power supply side lead wire introduction part is fixed to the outside of the insulator body, and an arrester connected to the upper electrode is provided within this cover.
The outer periphery of this cover is a conductive layer, the ground terminal of the arrester is connected to this conductive layer, and this conductive layer is connected to a mounting bracket provided on the outer periphery of the insulator body.

(Function) As a result, only the fuse tube is built into the insulator body, and the arrester is built into the cover that covers the cable head of the insulator body. When a lightning surge enters the cutout, it flows to the arrester via the upper electrode connected to the power supply side lead wire, and is discharged from the arrester to the ground via the conductive layer on the outer periphery of the cover and the cutout's mounting bracket.

It also protects the cutout itself from damage and the load side equipment of the cutout from lightning surges.

(Example) An example of this invention will be described below with reference to the drawings. Reference numeral 1 denotes an insulator body, and the insulator body 1 has a vertical cylinder shape, has a hollow part 2 with an open bottom end, and has a small diameter hole 3 in the top end. Reference numeral 4 denotes an upper electrode provided in the upper part of the hollow portion 2, and the upper electrode 4 is fixed to the lower end of the electrode mounting screw 5 passed through the hole 3. 6 is a terminal provided at the upper end of the insulator body 1;
An electrode mounting screw 5 protruding from the hole 3 is screwed into this terminal 6. Reference numeral 7 denotes a lower electrode provided at the lower part of the hollow portion 2, and this lower electrode 7 is connected to a load side lead wire 8 whose one end is introduced into the lower side of the insulator body 1. Reference numeral 9 indicates a fuse tube inserted into the hollow portion 2 with one end connected and supported to the upper electrode 4 and the other end to the lower electrode 7; 10, this fuse tube 9 is between the outer circumference and the inner circumference of the hollow portion 2; 11 is a lower cover provided at the lower end opening of the insulator body 1, 12 is an arc extinguishing chamber provided;
1 is an airtight lid that closes the lower end surface of the lower cover 11;
3 is a mounting bracket provided at the middle of the outer periphery of the insulator body 1;
Reference numeral 4 denotes a power source side lead wire introduced perpendicularly to the insulator body 1, and one end of this power source side lead wire 14 is connected to the terminal 6. Reference numeral 15 denotes a stress cone provided at the lead-out portion of the power supply side outlet wire 14, and this stress cone 15 is a cover that covers the upper outer periphery of the insulator body 1 and the terminal 6, and has an arrester storage portion 16 above the terminal 6. It is formed integrally with 17. Reference numeral 18 denotes an arrester 1 whose one end is connected to the terminal 6 and stored in the arrester storage section 16.
9 is a conductive layer provided on the entire outer periphery of the stress cone 15 and cover 17; 20 is the arrester 1;
A ground wire 21 has one end connected to the ground terminal of 8 and connected to the conductive layer 19, and 21 connects the conductive layer 19 and the mounting bracket 1
This is the grounding wire connected to 3.

In this embodiment, the normal current is the power supply side output wire 14.
It flows from the terminal 6 to the electrode mounting screw 5 to the upper electrode 4, passes through the fuse tube 9, and flows from the lower electrode 7 to the load side lead wire 8. Also, if a lightning surge enters from the power supply side outlet wire 14, the arrester 18 will be connected to the terminal 6.
The electric current flows through the ground wire 20, the conductive layer 19, the ground wire 21, and the mounting bracket 13, and is discharged to the earth in this order.

Although the grounding wires 20 and 21 are provided in the above embodiment, the present invention is not limited to this, and the grounding terminal of the arrester 18 can be connected to the conductive layer 19 by an appropriate method.
It is also possible to contact and connect to the mounting bracket.

(Effects of the invention) This invention has the above-described configuration, and since only the fuse tube is built into the insulator body, the shape of the insulator body can be simplified and miniaturized. Therefore, it is extremely simple to manufacture and easy to handle.

The arrester is built into the cover of the power supply side outlet wire introduction part on the outside of the insulator body, and the arrester is placed on the power supply side, making it easy to connect.
Furthermore, since the ground terminal of the arrester can be connected to the conductive layer on the outer periphery of the cover, and this conductive layer can be connected to the cut-out mounting fitting, there is no need to take the trouble of providing a grounding wire from the arrester to the mounting fitting as in the conventional case.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, with FIG. 1 being a longitudinal sectional view of this invention, and FIG. 2 being a front view of the arrester of this invention. In the figure, 1 is the insulator body, 2 is the hollow part, 4 is the upper electrode, 6 is the terminal, 7 is the lower electrode, 8 is the load side lead wire, 9 is the fuse tube, 13 is the mounting bracket, and 14 is the power supply side port. Outgoing line, 17 is cover, 18 is arrester,
19 is a conductive layer.

Claims (1)

[Scope of utility model registration request] At the top of the insulator body with a built-in fuse tube, there is an upper electrode connected to the power supply side outlet wire, and at the bottom there is a lower electrode connected to the load side outlet wire, and each of these electrodes is connected to the fuse tube. A cover that covers the power supply side lead wire introduction part is fixed to the outside of the insulator body, and an arrester connected to the above-mentioned upper electrode is provided inside this cover.The outer periphery of this cover is used as a conductive layer, and the ground terminal of the above-mentioned arrester is connected. A cutout with an arrester characterized in that the conductive layer is connected to the conductive layer, and the conductive layer is connected to a mounting bracket provided on the outer periphery of the insulator body.