The glass parts of insulators for HVDC transmission lines are made of toughened glass, which has both high strength and self-checking characteristics. It can withstand the electrical stress under high-voltage electric field, and carry the self-weight of conductor, operating tension and external mechanical stress such as wind load and ice cover, with breaking load strength up to 40kN, which guarantees the structural stability of the line. The zero-value self-breaking characteristics of the tempered glass can quickly identify failed insulators, significantly reducing the difficulty of inspection and operation and maintenance costs.

The insulator can reliably withstand industrial frequency voltage and lightning impact voltage, effectively suppress leakage current and flashover risk, and provide stable electrical isolation between conductors and towers. The insulators are suitable for DC transmission systems of different voltage levels, and can be selected and configured according to project requirements, making them a key component for the safe operation of overhead lines.