Abb manufactures and supplies prefabricated outdoor modules and 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. Major benefits are reduction of site work [mechanical and electrical], land saving and significant reduction of substation engineering and commissioning.