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Suspended insulator

An insulator, hanging type technology, applied in the field of hanging type insulators, can solve the problems of increased surface impedance, conductive surface erosion, etc., to achieve the effect of improving the fouling resistance voltage, preventing fouling corona, and improving the voltage distribution

Inactive Publication Date: 2003-05-14
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is effective, but it also causes deterioration of the conductive surface due to contamination of the environment and increased surface resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 (about the length of the flange)

[0025] In order to obtain an appropriate range of the flange length in the first aspect of the present invention, as shown in Table 1 below, hanging insulators having various shed diameters and leakage distances were prepared. In each suspension type insulator, a conductive glaze layer composed of a resistive band and a ring-shaped conductive band is also formed up to the inner base of the target flange. The shape of each target flange is shown in Table 1 below. CA-500, CA-826, CA-845 have figure 1(a), (b) shows the shape of the annular protrusion 13A, the annular protrusion is shown as the first object flange, and the first annular flange 13-1 is shown as the second object flange. . CA-894 with figure 1 Unlike (a) and (b), the flange has a thin and long flange shape, and is a shape in which the annular protrusion 13A does not exist. Therefore, in CA-894, the first annular flange 13-1 is shown as the first target flange....

Embodiment 2

[0030] Example 2 (about the diameter of the ring electrode)

[0031] In order to obtain the appropriate range of the diameter of the conductive glaze layer (meaning the same as the diameter of the annular electrode (conductive band)) of the second aspect of the present invention, prepared figure 2 The ring-shaped electrode (conductive band) is installed at the position shown in ①~⑧, and the ring-shaped electrode and the impedance band are installed from the pin to the position shown in ①~⑧. For the prepared suspension insulator, find the length of the target flange with respect to the electrode diameter at each position, electrode diameter / cover magnet diameter (= 82mm) and the position where the ring electrode exists on the inner side of the flange with flange / leakage distance. Connect 5 prepared hanging insulators, and the adhesion density in salt: 0.25mg / cm 2 , Additional voltage: Under the condition of 55kV, according to the fog test method determined above, investigate...

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Abstract

Provided is a suspension insulator capable of individual improvement of damaged voltage resistance and damaged corona discharge prevention. With the suspension insulator equipped with a plurality of ring- shaped ribs formed with a pin metal fitting implanted at the center part as an axis on the undersurface just outside where glaze is applied, a resistance strip 31 with a surface resistance (1 cm× 1 cm) of not more than 4 MΩ is set, a ring-shaped conductive strip 32 at an outer periphery of the resistance strip 31, and further, (1) a conductive glaze layer consisting of the resistance strip 31 and the conductive strip 32 is fitted inside the ribs having a length of not less than 4% of leakage distance, and / or, (2) diameter of the outer periphery of the conductive glaze layer of the underside consisting of the resistance strip 31 and the conductive strip 32 is to be not more than twice that of a cap part on the top face.

Description

technical field [0001] The present invention relates to a hanging type insulator for high-voltage power transmission with improved anti-fouling voltage characteristics. Background technique [0002] Suspension type insulators for high-voltage power transmission are in a state where salt in seawater brought by wind and rain or salt in exhaust smoke from factories, etc. adhere to the surface, or in a state where it is wetted by rain, fog, etc. , there is a problem that the insulation resistance of the insulator surface is lowered, and the anti-fouling voltage characteristics such as breakdown are lowered. Therefore, this anti-fouling voltage characteristic is an important technical element in the insulation design of power transmission facilities. [0003] Generally, it is known that the anti-fouling voltage characteristic can be improved by designing the surface leakage distance of the suspension insulator to be longer. Therefore, increasing the umbrella diameter and increas...

Claims

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Application Information

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IPC IPC(8): H01B17/02H01B17/42
Inventor 入江孝秋月优宏小川茂佐藤健次
Owner NGK INSULATORS LTD
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