Insulator

Insulators (commonly known as porcelain bottles) consist of two parts: a porcelain part and a metal fitting, which are glued together with cement adhesive. The porcelain part ensures that the insulator has good electrical insulation strength, and the metal fitting is used to fix the insulator. The role of insulators has two aspects: one is to firmly support and fix the current-carrying conductor, and the other is to form a good insulation between the current-carrying conductor and the ground.

Creepage distance and leakage distance are both parameters specific to external insulation. The distance along the surface of external insulation is the leakage distance of electricity, also known as creepage distance, or creepage distance for short. The leakage distance multiplied by the effective coefficient and then divided by the line voltage is the leakage distance, that is, λ=KL/U

Why is the surface of the insulator made into a corrugated shape? (1) It can extend the arc creepage length and increase the arc creepage distance within the same effective height, and each one can also play the role of blocking the arc.

(2) It can block the flow of water on rainy days, so that sewage cannot flow directly from the upper part of the porcelain bottle to the lower part, avoiding the formation of flying dust and causing confusion.

(3) When the dust falls on the corrugated porcelain insulator, it is unevenly distributed, thus ensuring the strength of the porcelain bottle to a certain extent.

Operation experience has shown that tension insulator strings are subject to greater mechanical loads and are prone to deterioration, and the chances of zero-value insulator strings are greater than in suspension strings, so the number of reserved insulators should be one more than that of straight strings.