... close the load current, overload current and short-circuit current in cities and country power distribution system ... ,phase75insulating fracture853Rated CurrentA400,634Rated short-circuit breaking current (peak)KA12.5,16,205Rated short-circuit closing current (peak)31 ... ,16,208Breaking times of rated short-circuit switch-off currentTimes309Rated duration of short-circuitS410Rated operating orderO-0.3S ...