... voltage 12kV) Rated current: 630A, 1250A, 1600A. Rated short circuit breaking current: 20kA, 25kA, 31.5kA. One minute power frequency ... withstand current (peak value): 50kA, 63kA, 80kA. Rated short circuit making current (peak value): 50kA, 63kA, 80kA. Rated individual ... 630A Rated back-to-back capacitor bank breaking current: 400A Indoor Side loading Vaccum Circuit Breaker (11kV VCB) VS1-12(ZN63A)