CN205753300U - 10kV distribution line lightning protection earthing device - Google Patents

Abstract

The utility model discloses a lightning protection and grounding device for a 10kV power distribution line, which comprises a drain wire connected with a wire of a power transmission line and a lightning arrester installed on a pole tower through the cross arm of the lightning arrester, the lightning arrester is connected with a grounding device, and the drain wire A power transmission isolation device is arranged between the arrester and the lightning arrester. The utility model can conveniently isolate the lightning arrester from the power transmission line through the power transmission isolation device, so that the lightning arrester can be repaired or replaced without power failure of the line, greatly improving the operation reliability of the power distribution line, and reducing the number of operation and maintenance personnel work intensity.

Description

10kV distribution line lightning protection grounding device

technical field

The utility model relates to the technical field of power grid construction, in particular to a lightning protection grounding device for a 10kV power distribution line.

Background technique

10kV line insulation is the current development trend of distribution lines, but with the line insulation comes a problem that troubled countless distribution operation and maintenance personnel, that is, the insulated wires have poor lightning resistance. Once a lightning strike occurs on the line, it is very likely that the insulated wire will be blown due to a large amount of lightning current that cannot be released, causing the line to be out of service. The currently more effective and commonly used solution is to install a group of line arresters every several hundred meters on the insulated line.

At present, the installation process of the line arrester is generally to directly connect the arrester to the line with wires. This installation process has great disadvantages, which are mainly reflected in the following aspects: (1) The verification and replacement of the arrester must be carried out after a line power failure; (2) Once the arrester fails, effective repair cannot be carried out in time. Isolation affects the line operation.

Utility model content

The technical problem to be solved by the utility model is to provide a lightning protection and grounding device for 10kV power distribution lines which is convenient for maintenance and operation and is conducive to stable operation of the line.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a lightning protection grounding device for 10kV power distribution lines, including a drain wire connected to the wires of the power transmission line and a lightning arrester installed on the tower through the cross arm of the lightning arrester, and the lightning arrester is connected with A grounding device, a power transmission isolation device is arranged between the drain wire and the lightning arrester.

As a preferred technical solution, the power transmission isolation device includes an isolation knife gate cross-arm installed on the pole tower, an isolation knife gate connection plate is installed on the isolation knife gate cross-arm, and the isolation knife gate connection plate is installed There is an isolation knife switch for conducting or cutting off the drain wire.

As a preferred technical solution, the grounding device includes a grounding wire with one end connected to the lightning arrester, and the other end of the grounding wire is connected with a grounding electrode protruding into the ground.

Due to the adoption of the above-mentioned technical scheme, the lightning protection and grounding device for 10kV distribution lines includes a drain wire connected to the wire of the transmission line and a lightning arrester installed on the tower through the cross arm of the lightning arrester. The lightning arrester is connected with a grounding device, and the drain wire There is a power transmission isolation device between the lightning arrester; the utility model has the following beneficial effects: the lightning arrester can be conveniently isolated from the power transmission line through the power transmission isolation device, so that maintenance or replacement of the lightning arrester can be performed without power failure on the line, It greatly improves the operation reliability of the distribution line and reduces the work intensity of the operation and maintenance personnel.

Description of drawings

The following drawings are only intended to illustrate and explain the utility model schematically, and do not limit the scope of the utility model. in:

Fig. 1 is a schematic structural view of an embodiment of the utility model.

In the figure: 1-wire; 2-drainage line; 3-arrester cross arm; 4-tower; 5-arrester; 6-grounding device; 61-grounding wire; 62-grounding electrode; 7-transmission isolation device; Knife gate cross arm; 72-isolating knife gate connecting plate; 73-isolating knife gate.

detailed description

Below in conjunction with accompanying drawing and embodiment, further set forth the utility model. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, those skilled in the art would realize that the described embodiments may be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in Figure 1, the lightning protection and grounding device for 10kV distribution lines includes a drain wire 2 connected to the conductor 1 of the transmission line and a lightning arrester 5 installed on the tower 4 through the lightning arrester cross arm 3, and the lightning arrester 5 is connected with a grounding device 6. A power transmission isolation device 7 is set between the drain wire 2 and the lightning arrester 4 .

Wherein, the power transmission isolation device 7 includes an isolating knife gate cross arm 71 installed on the pole tower 4, an isolating knife gate connecting plate 72 is installed on the isolating knife gate cross arm 71, and the isolating knife gate connecting plate 72 An isolation knife switch 73 for conducting or cutting off the drain wire 2 is installed on it. When the lightning arrester 5 needs to be repaired or replaced, the lightning arrester is disconnected from the transmission line through the isolation knife switch 73 to realize isolation, and the transmission line can continue to run without power failure. The reliability of the operation of the electric line reduces the work intensity of the operation and maintenance personnel.

In this embodiment, the grounding device 6 includes a grounding wire 61 with one end connected to the lightning arrester 5, and the other end of the grounding wire 61 is connected with a grounding electrode 62 protruding into the ground. The structure is simple and practical. Other grounding devices are adopted and will not be described in detail.

The above descriptions are only illustrative specific implementations of the present utility model, and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the protection scope of the present invention.

Claims (3)

1.10kV distribution line lightning protection earthing device, it is characterised in that: include the drainage thread that the wire with transmission line of electricity is connected And the spark gap being installed on shaft tower by spark gap cross-arm, described spark gap connects grounding device, described drainage thread with Transmission of electricity isolating device it is provided with between described spark gap.

2. 10kV distribution line lightning protection earthing device as claimed in claim 1, it is characterised in that: described transmission of electricity isolating device bag Include the isolation switch cross-arm being installed on described shaft tower, described isolation switch cross-arm be provided with isolation switch yoke plate, described every The isolation switch of drainage thread described on or off is installed on disconnecting link yoke plate.

3. 10kV distribution line lightning protection earthing device as claimed in claim 1 or 2, it is characterised in that: described grounding device bag Including the earth lead that one end is connected with described spark gap, underground earthing pole is stretched in the other end connection of described earth lead.