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 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.

Using glass insulators, the need for regular preventive electrical tests during operation can be eliminated. This is because any damage to the tempered glass results 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 get trapped, and the remaining mechanical strength of the insulator is sufficient to prevent the insulator string from breaking off.