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

Due to the high mechanical strength of the glass insulator 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, which occurs within the first year of operation, whereas defects in porcelain insulators are only discovered after several years of operation.

Utilizing glass insulators allows for the elimination of the charged periodic preventive tests performed on insulators during operation. This is because any damage to the tempered glass results in the destruction of the insulator, which is easily noticeable by maintenance personnel during their rounds. When an insulator is damaged, glass fragments near the steel cap and iron foot become trapped, and the remaining mechanical strength of the insulator is sufficient to prevent the insulator string from breaking away. The rate of self-breakage for glass insulators is one of the important indicators of product quality and serves as the quality basis for bidding and tendering in transmission engineering projects.