Product Description Major Technical Data: Rated voltage: 12KV Rated frequency: 50HZ Rated current: 630A. 1250A. 1600A. 2000A. 2500A. 3150A. 4000A. 5000A. Rated short circuit current to be turn-off: 20KA. 31. 5KA. 40KA. 63KA. Mechanical lifetime of the operating device: í¦100, 000 times (5000A 63KA Mechanical lifetime: í¦60, 000 times) Mechanical lifetime: (630A-1250A) 20KA í¦50, 000 times. (1250A-3150A) 31. 5KA í¦50, 000 times (1250A-4000A) 40KA í¦30, 000 times (5000A) 63KA í¦30, 000 times Operating voltage for switch-on and switch-off: DC220V or AC220V. Model: ZN73A-12 Standard: ISO9001 CQC CCC.