Requirements for electric strength and dielectric strength of Porcelain Insulator products
2023-03-27
Porcelain Insulator products work by connecting air in parallel with the insulator for insulation.
Porcelain Insulator products work by connecting air in parallel with the insulator for insulation. Therefore, if the voltage is too large when using the insulator, it will cause discharge between the Porcelain Insulator products and the air, or the porcelain insulator will be broken down by the air. Therefore, Porcelain Insulator products must be able to withstand a certain voltage to prevent flashing.
In addition, Porcelain Insulator products are mainly used for high-voltage transmission lines, C high-voltage transmission lines and external insulation parts of electrical equipment in power stations, so they must have high external insulation performance.
Porcelain Insulator products are widely used in the external insulation equipment of high-voltage and C high-voltage transmission lines and related electrical equipment, so there are high requirements for the electrical performance of the external insulation. For available Porcelain Insulator products and ceramic bushings, the environment is more complex, some of which require a combination of mechanical, electrical and thermal loads. Therefore, these two Porcelain Insulator products also have high requirements on internal insulation performance, and must pass the internal insulation test before leaving the factory. If the insulator can be broken down, an electric spark test is required to detect whether there are problems such as cracks and air bubbles. If a problem is found, it is directly classified as waste. For porcelain bushings, impact tests and humidity resistance tests are required, and the capacitance and dielectric loss of capacitor porcelain bushings are measured. Whether it is a wet connection molding or a porcelain connection molding casing, it must pass the porcelain wall pressure test and interface quality test.
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