Glass insulators demonstrate a series of advantages over porcelain insulators in the initial years of production and operation:

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 mainly 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.

Glass insulators can eliminate the need for regular preventive tests on the insulators during operation, as any damage to the tempered glass will result in the destruction of the insulator, which is easily detectable by maintenance personnel during inspections. When an insulator is damaged, glass fragments near the steel cap and iron foot are trapped, and the remaining mechanical strength of the insulator is sufficient to prevent the insulator string from breaking. The self-breakage rate of glass insulators is one of the important indicators for measuring product quality and serves as a quality criterion for bidding and tendering in transmission engineering projects.