Sociedad Española de Montajes Industriales, S.A. - Grupo Semi - - Electrical engineering and consulting

For road transport, Semi makes installations in tunnels both roads as rail (meters, light-rail and conventional rail), as well as projects for lighting and marking of roads, lighting in developing energy networks, transformers, electrical power and lighting systems, installation of luminaires, Poles sos, tunnels, power: medium voltage, low voltage, emergency and SAIS, normal and emergency lighting, control of luminaires, transverse, longitudinal ventilation and filters, environmental sensing, detection and extinction of fires, communications and radio networks posts sos and PA system, integration of facilities and systems.