Tempered glass insulators feature zero-value self-breakage. Observation can be performed from the ground or from a helicopter, eliminating the need for pole-climbing and piece-by-piece inspection, thus reducing labor intensity.
Products from imported production lines have an annual self-breakage rate of 0.02-0.04%, saving on line maintenance costs. They also exhibit good arc and vibration resistance.
Even after lightning strikes during operation, the new surface of the glass insulator remains smooth glass with a tempered internal stress protection layer, thus maintaining sufficient insulation energy and mechanical strength.
In multiple incidents of conductor galloping caused by icing on 500kV lines, the electromechanical performance of glass insulators subjected to conductor galloping showed no degradation after testing.
They have good self-cleaning properties and are not prone to aging. According to the power sector, glass insulators are not prone to dirt accumulation and are easy to clean; glass insulators operating on southern lines are relatively clean after rain.
Regular sampling and testing of the electromechanical performance of glass insulators on lines in typical areas after operation, based on thousands of data points, shows that the electromechanical performance of glass insulators after 35 years of operation is basically consistent with that at the time of manufacture, with no signs of aging.
With its large main capacitance and uniform voltage distribution across the string, and the dielectric constant of glass (7-8), tempered glass insulators possess a large main capacitance and uniform voltage distribution across the string. This helps reduce the voltage across the insulators near the conductor and grounding sides, thereby reducing radio interference, lowering corona loss, and extending the lifespan of the glass insulators. Practical operation has proven this to be true.
Tempered glass insulator types: Standard type, Pollution-resistant type, DC type, Spherical type, Aerodynamic type, Ground wire type (for electrified railway contact networks)
Standard type suspension glass insulators: U70 SXP-70, U100 SXP-100, U120 SXP-120, U160 SXP-160, U210 SXP-210, U240 SXP-240, U300 SXP-300
Pollutation-resistant suspension glass insulators: U70BLP SXWP-70P, U100BLP SXWP-100P, U120BLP SXWP-120PU, U160BLP SXWP-160PU, U210BLP SXWP-210P, U240BLP SXWP-240P
