FIELD: electrical engineering, specifically, high- voltage gas-filled switches of industrial networks. SUBSTANCE: arc control device of high-voltage gas-filled autocompression switch includes immobile and mobile main and arc-extinction contacts coupled to drive, compression space formed between mobile cylinder and immobile piston, mobile spring-loaded piston and insulation nozzle. Immobile piston has cylindrical space on side opposite to compression space communicating with compression space. Additional mobile piston placed coaxially in cylindrical space is interference fit and spring-loaded with regard to immobile piston. EFFECT: increased operational reliability of switch. 1 cl, 1 dwg
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