One end of the high-voltage wire connection tower is hung with a large number of disk-shaped insulators, which are used to increase the creepage distance, usually made of glass or ceramic, and are called insulators.
In order to prevent dust and other contamination from adhering on the surface of the insulator, the formation of the passage is broken by the voltage across the insulator, that is, creepage. Therefore, increasing the surface distance, that is, the creepage distance, the distance discharged along the insulation surface, that is, the leakage distance is called the creepage distance. Surface distance / system maximum voltage. Depending on the degree of contamination, heavy dirt areas generally use a creepage distance of 31 mm / kV.
A zero-value insulator refers to an insulator whose potential distribution across the insulator is close to zero or equal to zero during operation.
Effect of zero or low value insulator: The insulation of the line conductor depends on the insulator string. The insulation performance of the insulator will continue to deteriorate due to manufacturing defects or external influences. When the insulation resistance is reduced or zero, it is called low value or zero value insulator. We have tested the line, and the ratio of zero or low value insulators is as high as 9%. This is another reason for the high lightning strike rate of our company. The insulator is smooth and reduces the capacitive reactance between the wires to reduce current loss.
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