Main technical data rated voltage 40.5kV rated current 1600/2000A rated frequency 50Hz rated short-time power frequency withstand voltage 95kV rated lightring impulse withstand voltage 185kV rated short-circuit breaking current 20/25KA rated short-circuit making current 50/63KA rated operations of short-circuit breaking current interruption 20 times rated single capacitor bank breaking current 630A rated short-time withstand current 20/25kA rated peak withstand current 50/63kA rated duration of short-circuit 4s mechanical life 10000times contact closing force due to bellows and atmosphere 250±50N counterforce at rated contact stroke 330±60N circuit resistance at rated contact force ≤25μΩ shelf life 20years contact erosion limit 3mm weight of moving parts ≤4kg mechanical data required for matched vacuum switchgear rated contact stroke 22±2mm average opening speed 1.6±0.2m/ average closing speed 0.75±0.2m/s added contact force 3100±200N contact bouncing duration at closing operation ≤2ms contact bouncing bank amplitude of opening operation ≤4mm three-pole simultaneity ≤2ms