10kV high-altitude lightning arrester

Abstract

The utility model discloses a lightning arrester which comprises two sections of lightning arrester elements which are connected in series, a composite jacket is sleeved on the outer side of each section of lightning arrester element, and a resistor disc column is arranged in each section of lightning arrester element. And the upper end of the upper lightning arrester element is provided with a wiring bolt. And the lower end of the lower lightning arrester element is fixed through a mounting bracket. The resistor disc column is formed by connecting a plurality of resistor discs in series, the diameter phi of each resistor disc is 48 mm, and the thickness of each resistor disc is 24 mm. When being used in a high-altitude environment of a low-voltage-grade alternating-current system, the high-altitude high-voltage alternating-current power transmission system improves the external insulation protection level of equipment, and ensures the safety and reliability of a power transmission system and the reliability of long-term operation. The lightning arrester is mainly used for power stations in high-altitude environment areas, and is vertically mounted.

Description

Technical Field

[0001] The utility model belongs to the technical field of lightning arresters, and relates to a 10kV lightning arrester suitable for use in a high-altitude environment of a low-voltage AC system. Background Art

[0002] With the increasing demand for lightning arrester products with special performances in the high-altitude environment of low-voltage grades in China, more special products are put into use, reflecting the importance of such products in power equipment. At present, there is no report on 10kV high-altitude lightning arresters suitable for low-voltage AC systems, making it difficult to meet the actual working needs. Content of the Utility Model

[0003] The purpose of the utility model is to provide a 10kV high-altitude lightning arrester, filling the blank of such lightning arresters and greatly meeting the actual working needs.

[0004] The technical solution adopted by the utility model is as follows: The lightning arrester includes two lightning arrester elements connected in series. Its characteristics are:

[0005] A composite outer sheath is sleeved outside each lightning arrester element, and a column of resistor chips is arranged inside;

[0006] A wiring bolt is provided at the upper end of the upper lightning arrester element;

[0007] The lower end of the lower lightning arrester element is fixed through a mounting bracket;

[0008] The column of resistor chips is composed of a plurality of resistor chips connected in series. The diameter of each resistor chip is φ48mm, and the thickness is 24mm.

[0009] The use of the utility model in the high-altitude environment of a low-voltage AC system improves the external insulation protection level of the equipment, ensuring the safety and reliability of the power transmission system and the reliability of long-term operation. This lightning arrester is mainly used in power stations in high-altitude environment areas and is installed vertically.

[0010] The utility model has the following characteristics:

[0011] 1. Since a plurality of resistor chips connected in series are arranged inside each lightning arrester element, and the size of each resistor chip is φ48mm×24mm, which belongs to a resistor chip of a conventional specification. Without upgrading the product structure, it can meet the special parameter requirements of the lightning arrester, thereby meeting the energy and voltage ratio performance requirements of relatively special lightning arresters. Moreover, this new product can still meet the installation environment under the height limitation in power stations in high-altitude environment areas.

[0012] 2. Mechanical strength. According to the requirements of GB / T22389-2008, when conducting a mechanical load test, the pressure release performance is taken into account in the design of mechanical strength.

[0013] 3. Pressure release performance of the lightning arrester. A unique pressure release device should be adopted in the structural design. The analysis and test results show that the composite outer sheath type lightning arrester can release pressure normally. The disc-shaped resistor chips are more likely to release pressure.

[0014] 4. The utility model is specially designed for power stations in high altitude environment areas. Without increasing the overall structure of the lightning arrester, it can meet the requirements of various indicators, thus controlling the production cost. Brief Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the utility model;

[0016] Figure 2 is the structural schematic diagram of the lightning arrester element of the utility model;

[0017] Figure 3 is the internal structural schematic diagram of the lightning arrester element of the utility model.

[0018] In the figure: 1 - wiring bolt; 2 - small umbrella; 3 - large umbrella; 4 - lightning arrester element; 5 - mounting bracket; 6 - composite outer sheath; 7 - aluminum electrode; 8 - resistor chip; 9 - insulating cylinder; 10 - bolt. Detailed Description of the Invention

[0019] As shown in the figure, the utility model includes 2 series-connected lightning arrester elements 4, and these 2 lightning arrester elements 4 are connected into a whole by bolts 10. A composite outer sheath 6 is sleeved outside each lightning arrester element 4, and multiple resistor chip columns are arranged inside. A wiring bolt 1 is provided at the upper end of the upper lightning arrester element 4. The lower end of the lower lightning arrester element 4 is fixed by a mounting bracket 5. Each resistor chip column is composed of multiple resistor chips 8 connected in series. The diameter of each resistor chip is φ48mm, and the thickness is 24mm. The number of the resistor chips can be determined according to the usage needs. In this embodiment, the number of resistor chips 8 in each resistor chip column is 4 - 5 pieces. Aluminum electrodes 7 are respectively provided at the upper and lower parts of the resistor chip column. 9 in the figure is the insulating cylinder.

[0020] The umbrella shapes of the composite outer sheath 6 all adopt the structure of large umbrellas 3, small umbrellas 2, and smooth umbrellas without ribs under the umbrellas. Its inner diameter is φ50mm, and the outer diameter is φ68mm; the large umbrella 3 extends 25mm, the small umbrella 2 extends 15mm, the upward inclination angle of the umbrella is 11°, the umbrella spacing is 19mm, and the creepage distance of the lightning arrester is not less than 760mm. This kind of composite outer sheath large and small umbrella structure has obvious pollution resistance ability. The creepage distance ratio of the composite outer sheath type product is 54mm / kV, which is greater than the required value of 53mm / kV.

[0021] The technical parameters of the utility model are shown in the following table:

[0022]

[0023]

Claims

1. A 10 kV high altitude lightning arrester, comprising two lightning arrester elements (4) connected in series, characterized in that: Each lightning arrester element (4) is covered with a composite jacket (6) on the outside and a resistor column is arranged inside; A connection bolt (1) is provided at the upper end of the upper lightning arrester element (4); The lower end of the lower lightning arrester element (4) is fixed by a mounting bracket (5); The resistor sheet column is composed of a plurality of resistor sheets (8) connected in series, and each resistor sheet (8) has a diameter of φ48 mm and a thickness of 24 mm.

2. The 10kV high altitude arrester according to claim 1 is characterized in that: The number of resistor sheets (8) in each resistor sheet column is 4-5 sheets; and aluminum electrodes (7) are respectively provided at the upper and lower parts of the resistor sheet column.

3. The 10kV high altitude arrester according to claim 1 or 2, characterized in that: The umbrella shape of the composite jacket (6) adopts a large umbrella (3), a small umbrella (2), and a light umbrella structure without edges under the umbrella, with an inner diameter of φ50mm and an outer diameter of φ68mm; the large umbrella (3) extends 25mm, the small umbrella (2) extends 15mm, the upper inclination angle of the umbrella is 11°, the distance between the umbrellas is 19mm, and the creepage distance of the lightning arrester is not less than 760mm.

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