Vacuum circuit breaker 3AF0

live-tankinductiveground fault

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. The right solutions for tomorrow’s intelligent networks 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. Easy to install, operate and maintain Due to their modular structure and lightweight components, our live-tank circuit breakers 3AF0 can easily be transported to their installation site. Their switching function is based on the same, well-proven components we use for our indoor circuit breakers. In addition, they can be optimally adapted to each application using current and voltage transformers.