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 the glass typically remains constant throughout its operation, and its aging process is much slower than that of porcelain. Therefore, glass insulators are mainly retired due to self-damage, occurring within the first year of operation, whereas the defects in porcelain insulators are only discovered after several years of operation.

Glass insulators can eliminate the need for regular preventive tests of the insulators during operation, as any damage to the tempered glass will cause the insulator to fail, making it easily detectable during patrols. When the 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 string of insulators from breaking off.