According to the requirements of the power system and the operating environment conditions for insulators, my country's overhead lines need to use AC 10~1000kV, 70~530kN and DC ±500~±1000kV, 160~530kN suspension porcelain, glass and composite insulators.

According to the requirements of the power system and the use environment for insulators, my country's overhead lines need to use AC 10-1000kV, 70-530kN and DC ±500-±1000kV, 160-530kN suspension porcelain, glass and composite insulators. Substations and converter stations need to use AC 35-1000kV, 2-25kN and DC ±500-±1000kV, 2-25kN indoor and outdoor rod-shaped post insulators, whose structural height can reach more than 10m and the average diameter can reach 300-600mm. Substations and converter stations also need to use AC 10-1000kV and DC ±500kV-±1000kV circuit breakers, load switches, disconnectors, grounding switches, mutual inductors and power transformers and other electrical equipment. The structural height can reach more than 10.5m and the average diameter can reach more than 900mm. And the need to use standard shape, aerodynamic or open umbrella shape, anti-fog shape, alternating umbrella shape, double umbrella and triple umbrella shape.