Common insulator types of distribution lines

The conductors of overhead power lines are fixed on poles and towers by insulators and fittings. The insulator used for insulation between conductor and tower shall not only bear the effect of working voltage, but also the effect of overvoltage, but also bear the effect of mechanical force, temperature change and surrounding environment. Therefore, the insulator must have good insulation performance and certain mechanical strength. Generally, the surface of the insulator is corrugated. This is because: first, the leakage distance (also known as creepage distance) of the insulator can be increased, and at the same time, each wave twist can play the role of blocking the arc; Second, when it rains, the sewage flowing from the insulator will not directly flow from the upper part to the lower part of the insulator, so as to avoid the formation of sewage column and cause short-circuit accidents, and play a role in blocking the sewage flow; Third, when the pollutants in the air fall on the insulator, due to the unevenness of the insulating wavelet twist, the pollutants will not be uniformly attached to the insulator, which improves the anti pollution ability of the insulator to a certain extent. There are many kinds of insulators for overhead power lines. They can be classified according to the structural type, insulation medium, connection mode and bearing capacity of the insulators.

Structure type: disc insulator and rod insulator

Insulation medium: porcelain insulator, glass insulator, semiconductor glaze insulator and composite insulator

Connection mode: Ball insulator and slot insulator

Environment of the plant site, indoor insulator and outdoor insulator.

Bearing capacity: 5kn, 10kN, 12kn, 40kN, 60kn, 70kN, 100kN, 120kn, 160kN, 210kN, 300KN, 420kN, 550kn