Glass insulators demonstrate a series of advantages over porcelain insulators, particularly 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, which occurs within the first year of operation, whereas defects in porcelain insulators are only discovered after several years of operation.

Glass insulators eliminate the need for regular, preventative, charged tests during operation. This is because any damage to the tempered glass will break the insulator, making it easily noticeable during routine 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.