Some Special Devices used in the New Type of Power Plants for the Italian Telecommunication Systems

The paper describes some devices specially developed for the new type of centralized power plants for telecommunication equipment used by SIP, Italian Telephone Company. The remote rectifier's output power limitation device is of great usefulness in the power rating of the primary power plant, in particular of emergency generating sets. The selective supervising devices are an integral part of the power plants policy that requires, for reliability reasons, parallel operating stand-by units.