Vacuum circuit breaker 3AF Series

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With our Live-Tank outdoor vacuum circuit-breakers, we provide reliable quality for all your medium-voltage network needs Circuit-breakers form a most vital part of your medium-voltage network. They must make and break all currents within the scope of their ratings, from small inductive and capacitive load currents up to the short-circuit current, regardless of earth faults, phase opposition, etc. Outdoor vacuum circuit-breakers (OVCB) have to face even higher demands, with the additional influence of weather conditions. For its proven reliability, network operators around the world have chosen Siemens medium-voltage vacuum circuit-breakers for over 40 years, with over 350,000 vacuum circuit-breakers in service to date. Siemens puts large effort into developing and manufacturing its medium-voltage circuit-breakers to the highest possible standards, enabling them to withstand the toughest climates and function reliably in practically every kind of environment. The Live-Tank 3AF0 is used for transformer substations and distribution grids, where it reliably switches off overhead lines. It excels with its light-weight and space saving compact design. Moreover, it is totally restrike-free and offers reliable operation through its spring stored-energy operating mechanism. Tailor-made for traction power substations The Live-Tank 3AF04 / 3AF05 for AC traction power supplies is especially designed for railway distribution networks and consists of three major parts: the pole assembly, the operating mechanism box, and the supporting steel structure.