FIELD: lightning protection of electrical equipment or power lines.
SUBSTANCE: spark gap is proposed, including: an insulating body made using a dielectric, and an electrode mechanically connected to the insulating body, whereas a discharge chamber is made in the insulating body, which has an exit to the surface of the insulating body. The electrode covers the discharge chamber, and on the outer surface of the female electrode there is an outer insulating layer comprising a hole for supplying overvoltage or grounding of the female electrode to the female electrode, and on the inner surface of the female electrode there is an internal insulating layer. There is an open area inside the enclosing electrode at a distance of at least one fifth of the length of the discharge chamber from the exit from the discharge chamber, and the inner insulating layer is configured to develop a sliding discharge along the surface of the inner insulating layer from the open area of the enclosing electrode to the exit from the discharge chamber. Arresters can be combined into a multi-chamber system, which allows to extinguish the impulse arc of lightning overvoltage, preventing the related short-circuit current of the network.
EFFECT: improving the strength of the arrester, increasing the efficiency and reliability of its operation.
13 cl, 7 dwg
