12KV 1250A 25KA vacuum interrupter

12KV 1250A 25KA vacuum interrupter technical Specification No. Main Technical Specification Code12544 Type: TD14A-12/1250-25 VOLTAGE RATINGS AT RATED CONTACT STROKE 1Rated frequency Hz50 2Rated Voltage kV12 3Rated short-time power-frequency withstand voltage (1 min) kV42 4lightning impulse withstand voltage kV75 CURRENT RATINGS1Rated Current A1250 2Circuit resistance at lowest rated contact force mW≤20 3Rated short-circuit breaking Current kA25 4Breaking operations of rated short circuit breaking current Times30 5Rated short-time withstand current kA25 6Rated duration of short-circuit s4 7Rated peak withstand current kA63 8Rated short-circuit making Current kA63 9Rated breaking current of single capacitor bank A630 10Rated breaking current of back-to-back capacitor bank A400 11Rated operating sequence O-0.3s-CO-180s-CO MECHANICAL DATA1Weight of movable parts kg1.3 2Closing force due to bellow and atmosphere N140±50 3Force required to hold contacts open at full stroke N230±50 MECHANICAL REQUIREMENTS1Clearance between open contacts mm11±1 2Average opening speed(average of first 75% of contact gap) m/s1.1±0.2 3Average closing speed(average of last 30% of contact gap) m/s0.6±0.2 4Rated added external contact final force N2000±200 Added external contact force at contact touch point 1400±100 5Contact bouncing duration at closing operation ms≤2 6Closing and Opening non-simultaneity of three-phase Contacts ms≤2 7Maximum Rebound during opening mm≤3 LIFE1Storage life years20 2Mechanical endurance Times10000 3Contacts limit erosion mm3 NOTES 1.Meets or exceeds the electrical endurance requirements of class E2 for autoreclosing duty per IEC 62271-100 and GB 1984-2003. 2. Rated characteristics to be given on request.