Glass insulators, during the first few years of production and operation, have been found to have the following series of advantages over porcelain insulators:

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

Using glass insulators eliminates the need for periodic preventive tests with live electrical components 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 routine 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 string of insulators from breaking loose. The self-breakage rate of glass insulators is an important indicator of product quality and a key quality criterion for evaluating bids in transmission engineering tenders.