CN202197102U - Line Fixed Gap Overvoltage Protector - Google Patents

Abstract

The utility model discloses a circuit fixed gap overvoltage protector, including taking the insulated wire arrester, take the insulated wire arrester to pass through the antiskid installing support that falls and 10kV overhead insulated line insulator commonly used, the hookup of circuit cross arm, take the insulated wire arrester to pass through puncture larynx hoop and the hookup of 10kV insulated wire, take insulated wire arrester lower part installation composite insulator, take and installed right discharge electrode base between insulated wire arrester and the composite insulator, right discharge electrode and the hookup of right discharge electrode base bolt, left discharge electrode is installed to the lower part in the antiskid support that falls. The advantages are that: the distance of the discharge gap is fixed and is free from adjustment, so that the stability of the lightning stroke discharge performance of the two electrodes is ensured. The discharge electrode adopts a conical spherical structure, so that the sensitivity of acute-angle discharge is ensured, the discharge reliability is ensured, the discharge electrode does not burn after multiple discharges, and the discharge electrode adopts austenitic stainless steel material, so that the discharge electrode has good weather resistance and can prevent corrosion. The product has light weight, low cost, simple structure, beautiful appearance and strong practicability.

Description

Line Fixed Gap Overvoltage Protector

technical field

The utility model relates to a line fixed gap overvoltage protector, which belongs to the field of overhead line protection.

Background technique

Most of the overhead insulated lines are struck by induction lightning. When the lightning overvoltage flashes over, because the overvoltage protector is connected in parallel with the line insulator, the high potential caused by the lightning current will make the series gap of the overvoltage protector act, reducing the load on the tower arm and the conductor. Potential difference, to ensure that the insulator no longer flashover, thereby avoiding the line trip power failure, in order to ensure the normal operation of the overvoltage protector, it is necessary to ensure that the gap distance between the external discharge electrodes is within the specified range, the gap in the prior art The ring is integrally processed by spring stainless steel wire. There are the following problems in design: 1. The processing is relatively difficult. 2. Due to the rotation of the wind swing, the movement of the gap ring cannot be prevented, and the gap between the insulator and the gap ring cannot be guaranteed to be uniform.

Contents of the invention

The purpose of the utility model is to overcome the defects of the prior art, and propose a fixed-gap overvoltage protector structure for lines that can satisfy the fixed gap distance between discharge electrodes.

The technical solution of the utility model: its structure includes an insulated wire arrester, the insulated wire arrester is connected with the common insulator and line cross arm of the 10kV overhead insulated line through the anti-slip mounting bracket, and the insulated wire arrester is insulated from the 10kV through the puncture throat hoop Wire connection, a composite insulator is installed at the lower part of the arrester with insulated wires, a right discharge electrode base is installed between the arrester with insulated wires and the composite insulator, the right discharge electrode is connected with the right discharge electrode base by bolts, and the left discharge electrode.

The utility model has the advantages that the discharge gap distance is fixed without adjustment, and the lightning discharge performance of the two electrodes is guaranteed to be stable. Since the discharge electrode adopts a conical spherical structure, it can not only ensure the sensitivity of acute-angle discharge, but also ensure the reliability of discharge and not burn out after multiple discharges. The discharge electrode is made of austenitic stainless steel, which has good weather resistance and corrosion resistance. The product is light in weight, simple in structure, beautiful in appearance, strong in practicability, convenient in installation and maintenance-free.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram of the line fixed gap overvoltage protector.

1 in the figure is a commonly used insulator (PS-15/3N) for 10kV overhead insulated lines, 2 is a line cross arm, 3 is an anti-slip mounting bracket, 4 is a left discharge electrode, 5 is a lightning arrester with insulated wires, and 6 is a 10kV overhead insulation Conductor, 7 is the puncture throat hoop, 8 is the right discharge electrode, 9 is the positioning of the mounting bracket, 10 is the base of the right discharge electrode, and 11 is a composite insulator.

Detailed ways

Referring to accompanying drawing 1, its structure is a surge arrester 5 with insulated wires, which is connected with a commonly used insulator 1 and line crossarm 2 for 10kV overhead insulated lines through an anti-slip mounting bracket 3, and the arrester 5 with insulated wires is connected with a 10kV insulated wire 6 through a puncture throat collar 7 To connect, a composite insulator 11 is installed at the lower part of the lightning arrester with insulated wires 5, and a right discharge electrode base 10 is installed between the lightning arrester with insulated wires 5 and the composite insulator 11, and the right discharge electrode 8 is connected with the right discharge electrode base 10 by bolts. The left discharge electrode 4 is installed in the lower part of the bracket 3 .

The positioning 9 is installed between the composite insulator 11 and the anti-slip mounting bracket 3 .

The anti-slip mounting bracket 3 is installed on the lower end of the composite insulator 11 .

The horizontal distance between the centers of the left discharge electrode 4 and the right discharge electrode 8 is 30-70 mm.

The electrodes of the left discharge electrode 4 and the right discharge electrode 8 are conical spherical structures.

The working state of the line fixed gap overvoltage protector: when lightning overvoltage flashover occurs, the overvoltage energy on the 10kV insulated wire 6 is transmitted to the insulated wire arrester 5 through the puncture throat clamp 7. At this time, the insulated wire arrester 5 The zinc oxide resistor is turned on, because the zinc oxide resistor inside the surge arrester 5 with insulated wires is equipotentially connected to the right discharge electrode 8, so that the air gap between the left discharge electrode 4 and the right discharge electrode 8 is broken down by the overvoltage energy , forming a "point discharge" phenomenon.

When the line is in normal operation, the zinc oxide resistor sheet in the lightning arrester 5 with insulated wires is in a high-resistance state, that is, it is not conducting, and the air gap between the left discharge electrode 4 and the right discharge electrode 8 is spaced. The voltage protector does not withstand power frequency voltage and does not affect the normal operation of the line.

Claims (5)

1. Line fixed gap overvoltage protector, its features include lightning arrester with insulated wire, the lightning arrester with insulated wire is connected with the common insulator and line crossarm of 10kV overhead insulated line through the anti-slip mounting bracket, and the lightning arrester with insulated wire is connected with 10kV through the puncture throat hoop Insulated wire connection, a composite insulator is installed at the lower part of the arrester with insulated wires, and the right discharge electrode base is installed between the arrester with insulated wires and the composite insulator, and the right discharge electrode is connected with the right discharge electrode base by bolts, and is installed at the lower part of the anti-slip support. Left discharge electrode. 2. The line fixed gap overvoltage protector according to claim 1, characterized in that the anti-slip mounting bracket is installed at the lower end of the composite insulator. 3. The line fixed gap overvoltage protector according to claim 1, characterized in that: the composite insulator is installed and positioned between the anti-slip mounting bracket. 4. The line fixed gap overvoltage protector according to claim 1, characterized in that the horizontal distance between the centers of the left discharge electrode and the right discharge electrode is 30-70mm. 5. The line fixed gap overvoltage protector according to claim 1, characterized in that the electrodes of the left discharge electrode and the right discharge electrode have a conical spherical structure.

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