Selection of composite insulators

When choosing to use different types of composite insulators on AC and DC high-voltage transmission lines, full attention should be paid to the following points:

1) Comprehensively consider the cost of transmission lines, maintenance costs and accident losses, and strive to achieve the purpose of safe, economical and high-quality power supply;

2) The arrangement of insulator strings composed of different types of insulators should meet the insulation design requirements of AC and DC transmission lines under different voltage levels;

3) The mechanical strength of insulators should be compatible with the design and operation requirements of transmission lines of different voltage levels;

4) It has arc resistance capability that is suitable for the system fault current;

5) Excellent pollution resistance;

6) Low annual deterioration rate.

7) Less maintenance;

8) Compare the advantages and disadvantages of its characteristics according to the operating conditions and usage environment, and choose to use it.