FIELD: electrical engineering. ^ SUBSTANCE: proposed arc-control device that can be used in high-speed circuit breakers for overload and short-circuit protection of electrical equipment, for instance that of DC consists, is made in the form of arc chute that has external walls with arc-control horns between them and deion grids tilted through certain angle to one another and assembled of steel plates with air gaps between them. Flame-retardant grids are installed along deion grids at arc chute outlet. Holes are provided in external walls of arc chute in vicinity of deion grids. Provision is made for regulating aerodynamic factors occurring in the course of arc quenching due to elimination of ionized gas flow toward circuit-breaker contact group. ^ EFFECT: reduced size of arc chute, enhanced switching capacity of high-speed circuit breaker. ^ 1 cl, 2 dwg
