Sell Solid Encapsulated Pole Pillar Vacuum Circuit Breaker

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Description:TZNH-12 solid encapsulated pole pillar vacuum circuit breaker is used for power transmission and distribution networks, for connecting and disconnecting AC load, current overload and short circuit. Normal ambient conditions: 1) Altitude: ≤1,000m 2) Ambient temperature: -10 ~ +40°C 3) Ambient relative humidity: value of day mean ≤95% value of month mean ≤90% 4) Saturated steam voltage: value of day mean ≤2.2 x 10-3MPa, value of month mean ≤1.8 x 10-3MPa 5) No frequency acute shock, fire, blast, heavily pollution, and chemical erode situation 6) The crake degree of earthquake cannot be above 8 Major technical parameters: 1) Rated voltage: 12kV 2) Rated current: 630A, 1250A 3) Rated frequency: 50Hz 4) Rated insulation level: a) Lightning impulse withstand voltage: 75 (between phases, to earth), 85 (across the isolation distance) b) 1min power-frequency withstand voltage: 42 (between phases, to earth), 48 (across the isolation distance) 5) Rated short-circuit breaking current: 25kA, 31.5kA 6) Rated short-circuit making current: 63kA, 80kA 7) 4S short-time withstand current: 25kA, 31.5kA 8) Breaking time of the rated short-circuit breaking current: 50 times 9) Breaking time: ≤0.06s 10) Rated single capacitor bank breaking current: 630A 11) Rated back-to-back capacitor bank breaking current: 400A 12) Mechanical endurance: 30,000 times 13) Rated operating voltage: DC/AC 220V, 110V