JPH0673824U - Insulator device with lightning protection unit - Google Patents

Abstract

(57) [Abstract] [Purpose] In an insulator device with a lightning protection unit equipped with a conductive glaze insulator with a conductive glaze applied to the insulator body and a lightning protection unit assembled to the insulator body, a non-linear resistor is generated by a lightning surge. Provided is an insulator device in which the insulator body is not damaged even if it is damaged and a lightning protection unit does not require a large arrangement space. [Structure] Lightning arrester unit 10b is connected to non-linear resistors 15a, 1
5b and a pair of electrodes 16 and 17 contacting each end thereof are integrally covered with an elastic insulating member 18 to form a cylindrical shape, and this lightning protection unit 10b is fitted to the outer periphery of the insulator body 11. It is characterized by being installed after that.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insulator device with a lightning protection unit for insulating and supporting electric wires and protecting a system line from a lightning surge, and in particular, a conductive glazed insulator in which a conductive glazed body is applied to the insulator body, and the insulator body mounted on the insulator body. To an insulator device with a lightning protection unit provided with the lightning protection unit.

[0002]

[Prior art]

 Insulator devices with a lightning protection unit are roughly classified into two types, as shown in Japanese Utility Model Publication No. 64-5305 and Japanese Utility Model Publication No. 1-29934. The former type of insulator device has a lightning unit composed of a non-linear resistor and a pair of electrodes enclosed in a hollow part concentrically provided in the insulator body, and the latter type of insulator device has an insulator unit. It is arranged on one side of the outer periphery of the device at a predetermined interval.

[0003]

[Problems to be solved by the device]

 Among these types of insulator devices, in the former insulator device, when the non-linear resistor of the lightning arrester unit is destroyed due to excessive lightning surge, the follow current from the line flows through the insulator body and High heat or pressure shock of the arc may damage the insulator and cause a secondary disaster. Further, in the latter insulator device, since the lightning protection unit is located at a predetermined interval on the outer circumference of the insulator, there is a possibility that the maintenance work of the line may be hindered.

Therefore, an object of the present invention is to provide a conductor glazing with a conductive glazing on the body of the porcelain insulator, and a lightning protection unit with a lightning protection unit assembled to the body of the porcelain insulator. An object of the present invention is to provide an insulator device in which the insulator body is not damaged even if the linear resistor is damaged, and the lightning protection unit does not require a large arrangement space.

[0005]

[Means for Solving the Problems]

 The present invention comprises a conductive glazed insulator having a conductive glaze applied to the insulator body, and a lightning protection unit assembled to the insulator body, wherein the lightning protection unit is provided with a non-linear resistor and each end of the non-linear resistor. Characterized in that a pair of electrodes that come into contact with the portion are integrally covered with an elastic insulating member to form a cylindrical shape, and the lightning protection unit is fitted and attached to the outer periphery of the insulator body. Is.

[0006]

[Operation and effect of the device]

 In the insulator device having such a configuration, the leakage current from the line flows through the insulator body to generate Jule heat, and the surface of the insulator body is dried. Therefore, even if the surface of the insulator body is contaminated, the leakage current does not flow through a specific path, partial discharge is prevented by the leakage current, and the contamination withstand voltage of the insulator device is stabilized.

In the insulator device, however, since the lightning arrester unit is fitted and attached to the outer periphery of the insulator body in a state of being covered with the elastic insulating member, the insulator body and the lightning arrester unit are insulated from each other. Even if the non-linear resistor is broken by a lightning surge and a follower arc is generated, the heat and pressure shock of the follower arc on the insulator body is mitigated and the lightning protection unit is installed on the insulator periphery. Compared with the insulator device arranged with a space, the lightning arrester unit can have a smaller space, and the insulator device does not hinder the maintenance work of the line. Further, in the insulator device, since the leakage current flows on the surface of the insulator body, the influence of the leakage current on the lightning protection unit can be reduced and the discharge characteristics are improved.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an insulator device according to the present invention, FIG. 2 shows a lightning protection unit adopted in the insulator device, and FIG. 3 shows a state in which the lightning protection knit is covered with an elastic member.

The insulator device is composed of an insulator 10a and a lightning protection unit 10b. The insulator 10a is of a tight-tipped type, and comprises an insulator body 11, a base metal fitting 12, a pin metal fitting 13 and an arc cover 14. The base metal fitting 12 is fixed at the lower end of the insulator body 11 via a cement, The metal fitting 13 is fixed to the insulator main body 11 integrally with the base metal fitting 12 and projects downward. The arc cover 14 is made of semiconductive rubber, and is fitted and attached to the upper surface of the base metal fitting 12.

In the insulator 10 a, a conductive glaze is applied to the entire outer circumference of the insulator body 11 to form a conductive glaze, and the pin metal fitting 13 is supported by the pin 21 to be fixed and supported to stand upright. The insulated wire 22 is supported by the bind wire 23 along the annular groove 11b provided on the outer periphery of the head portion 11a. A semiconductive covering member 24 is interposed between the insulated wire 22 and the bind wire 23.

The lightning protection unit 10b is formed by covering a pair of non-linear resistors 15a and 15b and a pair of electrodes 16 and 17 with an elastic insulating member 18. Both the non-linear resistors 15a and 15b have an arc shape with a predetermined thickness, and the two electrodes 16 and 17 have an annular shape. The upper and lower electrodes 16 and 17 sandwich the two non-linear resistors 15a and 15b. In this state, it is fastened and fixed by the insulating bolt 19. Each of the electrodes 16 and 17 is provided with a plurality of arc horns 16a and 17a. The insulating member 18 is made of an elastic material such as ethylene propylene or rubber, and is formed by integrally molding with the non-linear resistors 15a and 15b and the electrodes 16 and 17 integrally.

The insulating member 18 is formed in a tubular shape, and the non-linear resistors 15 a and 15 b and the electrodes 16 and 17 are embedded in the tubular body 18 a. The arc horns 16a and 17a included in each of the electrodes 16 and 17 project from the upper surface or the lower surface of the cylindrical main body 18a by a predetermined length. In the insulating member 18, a plurality of folds 18b are formed on the outer periphery of the tubular body 18a, and the inner peripheral surface 18c of the tubular body 18a is formed in a wavy shape in the longitudinal direction. The inner circumference of the cylindrical main body 18a is slightly smaller than the outer circumference of the fitting portion of the insulator main body 11.

The lightning protection unit 10b is fitted and attached to the outer circumference of the insulator body 11. In this embodiment, the lightning protection unit 10b is fitted by the elasticity of the insulating member 18, and further the silicon-based adhesive applied to the inner circumferential surface 18c. It is elastically attached at. When the lightning protection unit 10b is fitted and attached to the insulator body 11, the arc horn 16a of the upper electrode 16 forms a discharge gap G1 with the bind wire 23 and the arc horn of the lower electrode 17 is formed. 17b forms a discharge gap G2 with the base metal part 12.

In the insulator device configured as described above, the leakage current from the insulated wire 22 flows to the surface of the insulator body 11 through the binder wire 23 and the coating material 24 to generate Joule heat, and the dry state is always maintained. To maintain. Therefore, the leakage current flowing on the surface of the insulator main body 11 does not concentrate on a specific path even if the insulator main body 11 is in a polluted state, the current density is lowered and partial discharge is prevented, and the pollution withstand voltage of the insulator main body 11 is reduced. Stabilizes. In this case, since the semi-conductive covering member 24 is interposed between the insulated wire 22 and the bind wire 23, the leakage current from the insulated wire 22 is shunted to the entire covering member 24 and the binding wire 23 The occurrence of partial discharge between the coil portions is prevented. Therefore, it is possible to prevent the occurrence of tracking due to partial discharge, prevent damage to the insulated wire, reduce fluctuations in leakage current to the insulator body 11, and stabilize the insulator insulation function in the contaminated area. It can be maintained for a long period of time.

In the insulator device, however, since the discharge gaps G1 and G2 are formed on the line side and the ground side, when the lightning surge penetrates the insulated wire 22 and flashes over, the lightning surge is prevented. It is captured by the arc horn 16a of 10b, and discharged from the arc horn 17a to the base metal fitting 12 through the non-linear resistors 15a and 15b. As a result, the line of the system is protected from the lightning surge, and the follow current from the line is blocked or suppressed to prevent the occurrence of the follow arc, and the insulator body 11 and the insulated wire 22 are protected.

In the insulator device, if the non-linear resistor is destroyed by an excessive lightning surge, a follower arc is generated, but the insulating member 18 of the lightning arrester unit 10b blocks the follower arc and absorbs high heat and pressure shock. And protects the insulator body 11. Further, since the leakage current from the insulated wire 22 flows on the surface of the insulator body 11, the leakage current flow to the surface of the lightning protection unit 10b is reduced, and the discharge characteristic of the lightning surge in the dirty state is stabilized. .

If the surface of the insulating member 18 constituting the lightning protection unit 10b is covered with a semi-conductive member, even if the surface of the insulator device is contaminated and the leakage current increases, the leakage current will increase. Since the partial discharge is blocked by shunting over the entire surface of, the insulation deterioration due to tracking is blocked and the stability of the lightning surge discharge characteristics is maintained.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an insulator device according to an embodiment of the present invention.

FIG. 2 is a perspective view of an assembly of a non-linear resistor and an electrode that constitutes a lightning protection unit used in the insulator device.

FIG. 3 is a partially cutaway front view of the lightning protection unit.

[Explanation of symbols]

10a ... Insulator, 10b ... Lightning protection unit, 11 ... Insulator main body, 12 ... Base metal fitting, 13 ... Pin metal fitting, 15a, 15
b ... Non-linear resistor, 16, 17 ... Electrode, 18 ... Insulating member, 22 ... Insulated wire, 23 ... Bind wire, 24 ... Covering member.

Claims (1)

[Scope of utility model registration request] 1. A lightening unit comprising a conductive glazed insulator having a conductive glaze applied to the main body of the insulator and a lightning protection unit assembled to the main body of the insulator, wherein the lightning protection unit includes a non-linear resistor and a non-linear resistor. A pair of electrodes abutting on the ends are integrally covered with an elastic insulating member to form a cylindrical shape, and the lightning protection unit is fitted and attached to the outer periphery of the insulator body. Insulator device with lightning protection unit.