Introduction Insulators are a special type of insulation control that can play an important role in overhead transmission lines. In the early years, insulators were mostly used in utility poles. Later, one end of the high-voltage high-voltage wire connection tower was hung with a large number of disk-shaped insulators. In order to increase the creepage distance, it is usually made of glass or ceramic, which is called an insulator. Insulators play two fundamental roles in overhead transmission lines, namely supporting the conductors and preventing current from returning to the ground. These two functions must be ensured. The insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulator will not have a major effect, which will damage the use and operating life of the entire line.
SUMMARY Insulators are about a few hundred nucleotide pairs long and are a regulatory sequence usually located between a promoter and a positive regulatory element (enhancer) or a negative regulator (which is heterochromatin). The insulator itself has neither a positive effect nor a negative effect on the expression of the gene, and its effect is simply to prevent other regulatory elements from acting on the activation or inactivation effects of the gene.
Structural Transmission and Distribution Lines Tempered Glass Insulators The main materials of general insulators are iron caps, tempered glass or ceramic and steel feet, and cement cement is used as a whole.
At the end of the high-voltage wire connection tower, a large number of disk-shaped insulators are hung. In order to increase the creepage distance, usually made of glass or ceramic, it is called an insulator.
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 insulators are smooth and reduce the capacitive reactance between the wires to reduce current loss.
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