1. Electricity - Electronics
  2. Switch and Relay
  3. Live-tank circuit breaker
  4. Siemens Medium-voltage – Power distribution

Vacuum circuit breaker 3AF Series

vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
vacuum circuit breaker
Add to favorites
Compare this product


vacuum, live-tank
Electrical characteristics
phase, medium-voltage, short-circuit, ground fault, inductive
Other characteristics
Primary current

Max.: 31,500 A

Min.: 20 A


Max.: 40.5 kV

Min.: 12 kV


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.


Other Siemens Medium-voltage – Power distribution products

Medium-voltage systems

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.