Porcelain Insulator products have a zero-value defect due to excessive mechanical load
2023-04-11
For Porcelain Insulator products, when there are defects such as tiny cracks in the ceramic part of the insulator head, with the intrusion of moisture during operation
For Porcelain Insulator products, when there are defects such as tiny cracks in the ceramic part of the insulator head, with the intrusion of moisture during operation, the insulation resistance of the insulator head decreases (producing a zero-value insulator), once the insulator string is struck by lightning or other reasons The flashover caused by the head resistance is extremely small, and the discharge distance along the umbrella disk is relatively long. The resistance is relatively large, so most of the energy is released from the head discharge channel of Porcelain Insulator products, and the heat generated when the arc passes through the head of the insulator Make the insulator burst open, resulting in a broken string.
It can be seen that the key to broken series of Porcelain Insulator products is that the insulator produces zero-value defects.
Severe icing and strong winds exceeding the design wind speed cause the insulators to bear excessive mechanical stress, which may cause cracks at the steel feet of the insulators, resulting in low zero value insulators.
The initial zero value of Porcelain Insulator products is mostly caused by its own material. With the improvement of the technical level of Porcelain Insulator products, the corresponding number is relatively reduced. With the increase of the service life of Porcelain Insulator products, several lightning strikes lead to zero values. focus on.
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