• Protection of power transformers connected to gis against lightning overvoltages 

      Rouco Rodríguez, Luis; Sigrist, Lukas; Gago García, Hugo; Palazuelos Bertó, Emilio; Bernal López, Jesús; Jimeno, M.A. (CIGRE (París, Francia), 2014-08-24)
      During the last ten years Iberdrola Distribución Eléctrica has built a considerable number of high voltagemedium voltage transformer stations in urban areas using high voltage (220 kV and 132 kV) Gas Insulated Substations ...