Rated voltage     12kv

Rated current     1250/1600A

Rated frequency   50Hz

Rated short-time power frequency withstand voltage(1min)   42kv

Rated lighting impulse withstand voltage(peak)             75kv

Rated short-circuit breaking current           31.5kA

Rated short-circuit making current(peak)       80kA

Rated operations of short-circuit breaking current interruption  30operations

Rated single capacitor bank breaking current    630A

Rated short-time withstand current      31.5kA

Rated duration of short-circuit          4s

Mechanical life                     20000operations

Closing force due to bellow and atmosphere     120±40N

Force required to hold contacts open at full  stroke     180±50N

Ciruit resistance at rated contact force   ≤25µΩ

Shelf life              20years

Contact erosion limit     3mm

Weight of moving parts   ≤1.5kg

Clearance between open contacts        11±1mm

Average opening speed              1.2±0.25m/s

Average closing speed              0.8±0.15m/s

Rated of contact force                 3350±200N

Contact bouncing duration at closing operation    ≤2ms

Out of simultaneity of contact closing and opening          ≤1ms