Ningbo Mingde Electrical Science And Technology Co.,ltd is a NINGBO MINGDE ELECTRICAL SCIENCE and TECHNOLOGY CO.,LTD based in Ningbo, China. Ningbo Mingde Electrical Science And Technology Co.,ltd is a member of exporthub.com since June, 2013. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in VCB,high, medium voltage circuit breaker. Please find our product details below:Sell 12kv ZW32 Outdoor High Voltage Vacuum Circuit Breaker1. Product General DescriptionZW32-12 type outdoor high voltage vacuum circuit breaker is three-phase AC, 50(60)Hz outdoor power distribution equipment with the rated voltage of 12kv/24kv, Used to open and close the load current, over load current, and short circuit current in the electric power system. Also used to protect and control the circuit in substation, mining and industrial enterprises, and frequently used in the operation places such as rural power network. 2. Using environmental condition A. The altitude above sea level does not over 2, 000 meters; B. Surrounding air temperature: -40 ℃ +40 ℃ ; C. The wind speed is not bigger than 34m/s; D. The air filthy should be with in Ⅲ degreeE. Installing places: Not flammable, the explosion hazard, chemistry corrode place; F. Does not have the regular fierce vibration3. Technical parameterTable 1 Circuit Breaker's Main Technical Data 　 　 　 Data NO Item Unit 12kv 24kv 1 Rated voltage kV 12 24 2 Rated frequency Hz 50 50 3 Rated current A 630/1250 630/1250 4 Rated short circuit breaking current 　 kA 20/25 20/25 5 Rated peak withstand current 　 kA 50/63 50/63 6 Rated short time withstand current/ lasting time kA/s 20/4 , 25/4 20/4 , 25/4 7 Rated short circuit closing current(peak) 　 kA 50/63 50/63 8 Rated operating sequence O-0.3s-CO-180s-CO 9 Mechanical life 次 10000 10000 10 Rated short circuit breaking current breaking times 次 50 20 11 1min power frequency wit