| 摘要 |
The lighting arrester for protecting elements of electrical facilities or a power transmission line comprises an insulation body which is made of a solid dielectric, preferably in the form of a bar, a strip or a cylinder, two main electrodes that are mechanically coupled to the insulation body and two or more intermediate electrodes. The intermediate electrodes, made in the form of bars or cylinders, are arranged between the main electrodes so that said intermediate electrodes are reciprocally shifted along the longitudinal axis of the insulation body or along a spiral line and make it possible to form a discharge channel between the adjacent electrodes. Furthermore, said electrodes are situated inside the insulation body and are separated from the surface of the body by an insulation layer. Dead or through discharge chambers coming out to the surface of the insulation body are made between the pairs of the adjacent electrodes. The dimensions of the chambers are selected so that a discharge is easily pushed out from the chambers to the surface of the insulation body, thereby increasing the efficiency of the discharge current quenching. In the preferred variants, the arrester is provided with an additional electrode for reducing a discharge voltage. The different variants of the structure of power transmission lines using said arrester are also disclosed. |
