One end of the high-voltage wire connecting tower hung a lot of disc-shaped insulator, it is to increase the creepage distance, usually made of glass or ceramic, called the insulator. In order to prevent dust and other pollution on the surface of the insulator attached to the formation of the path by the insulator at both ends of the voltage breakdown, that is, climbing, so increase the surface distance, that is, climbing distance along the insulation surface discharge distance is called distance, Surface distance / system maximum voltage, depending on the degree of contamination, heavy pollution areas generally use crawl distance of 31 mm / per kilovolt.

A zero-value insulator refers to an insulator with a potential distribution close to zero or equal to zero at both ends of the insulator.

The effect of the zero or low insulator: The insulation of the wire conductor depends on the insulator string, and the insulation performance of the insulator deteriorates due to manufacturing defects or external influences. When the absolute resistance is reduced or zero, it is called a low value or Zero value insulator, we have to detect the line, zero or low value of the proportion of insulators as high as 9% or so, which is the company line lightning strikeout rate is another major reason, the insulator is smooth, you can reduce the wire Between the capacitive reactivity to reduce the current loss.

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