Single- or two-phase outdoor module with vacuum breaker for AC railway power supply up to 27. 5 kV, 2000 A, 50/60 Hz. The module is a factory assembled frame fitted with FSK II breakers, a motor-operated disconnect function and hand-operated earthing switches. As core component, a vacuum breaker especially designed to meet the requirements of all electric railway network using a single-/two-phase system, fits the module.