In order to prevent dust and other dirt from adhering to the surface of the insulator, the Suspension Clamp is formed by the voltage across the insulator, that is, creepage. Therefore, increasing the surface distance of the Suspension Clamp, that is, the creepage distance, the distance along the surface of the Suspension Clamp is the leakage distance. Crawl distance. Crawl distance = surface distance / system maximum voltage. Depending on the degree of contamination, heavy dirt areas generally use a creepage distance of 31 mm / kV.
The indoor joint binding Suspension Clamp; for the outer plastic post insulator, the letter L before the dash indicates multi-edge, the letters A, B, D indicate that the mechanical damage load is 3.75, 7.5, 20kN, respectively. After the letter, the numerator indicates the rated voltage of kilovolts, and the denominator is the mechanical damage load kN number.