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Advantages and disadvantages of glass insulators

2022-08-15

2022-05-23

Advantages of glass insulators
1. Compared with porcelain, it has high dielectric strength.
2. Its resistivity is also high.
3. It has a low thermal expansion coefficient.
4. Compared with porcelain insulators, it has higher tensile strength.
5. Since it is transparent, it will not heat in sunlight like porcelain.
6. Due to its transparency, impurities and air bubbles can be easily detected inside the glass insulator.
7. Glass has a very long service life because the mechanical and electrical properties of glass are not affected by aging.

8. Glass is cheaper than porcelain.

Although glass insulators have so many advantages, they are not without disadvantages.

Disadvantages of glass insulators
1. Moisture is easy to condense on the glass surface, so air dust will be deposited on the wedge glass surface, which will provide a path for the leakage current of the system.
2. For higher voltages, the glass cannot be cast into irregular shapes because of the internal cooling internal strain due to irregular cooling.