ZW10-12 series outdoor high voltage vacuum circuit breaker Overview ZW10-12G / T630-12.5 / 16/20 type outdoor high voltage vacuum circuit breaker is a three-phase AC outdoor high voltage switchgear equipment, mainly for 12KV grade, rated current 630A, rated frequency of 50HZ rural power grids, urban and mining, railways, ports and distribution system, especially suitable for outdoor overhead lines, division and load current, overload current, short circuit current on the grid switching and protection. Model and its meaning breaker assembly adjustment parameters Item Unit Parameter 1 Rated voltage KA 12 2 Rated current A 630 3 Rated frequency HZ 50 4 frequency withstand voltage KV 42/48 5 lightning impulse voltage (peak) KV 75/85 6 rated short-circuit breaking current KA 6.3 12.5 16 20 7 Rated short-circuit current (peak) KA 15 31.5 40 50 8 Rated short time withstand current KA 6.3 12.5 16 20 9 Rated peak withstand current KA 15 31.5 40 50 10 rated Operating sequence stars -0.3S- combined points 11 combined points -180S- rated short-circuit current breaking times Mechanical life times 3012 1000013 sad movable contact permission attrition accumulation of mm 3 4 14 rated operating voltage with spring operating CT mechanism closing coil V DC or AC 220V Tripping coil 15 overcurrent trip coil rated operating current A 5 16 current transformer secondary current ratio 100 / 5.200 / 5.300 / 5.400 / 5.630 / 517 combined each phase main circuit resistance μΩ ≤200 18 weight Kg 150 Outline and installation dimensions Note: user any special requirements, after consultation with our plant OK.