Glass insulators have been found to have a series of advantages over porcelain insulators in the first few years of production and operation:

Due to the high mechanical strength of the glass insulator's surface, it is less prone to cracking. The electrical strength of glass generally remains constant throughout its operation, and its aging process is much slower than porcelain. Therefore, glass insulators are primarily retired due to self-damage, occurring within one year of operation, whereas defects in porcelain insulators are only discovered after several years of operation.

Using glass insulators, the need for periodic preventive tests on the insulators during operation can be eliminated. This is because any damage to the tempered glass will cause the insulator to fail, making it easily noticeable by maintenance personnel during inspections. When an insulator is damaged, glass fragments near the steel cap and iron foot get trapped, and the remaining mechanical strength of the insulator is sufficient to prevent the insulator string from breaking off.