The number of plants belonging to Terna at 31 December 2010, and 31 December 2009, is shown in the following table:

  TERNA
31 Dec. 2010 31 Dec. 2009 Change
Stations no. 412 no. 383 + no. 29
Transformers no. 632
125,251 MVA
no. 620
121,501 MVA
+ no. 12
+3,750 MVA
Bays no. 4,706 no. 4,537 + no. 169
Lines 40,805 km 39,819 km +986 km
3-phase power lines no. 2,247
45,707 km
no. 2,167
44,560 km
+ no. 80
+1,147 km

Stations
In relation to the stations, in particular, the start-up of 29 plants is noted:

  • 3 new transformation stations: Castegnero, Maida and Bisaccia;
  • 13 new switching stations: Turano, San Severo, Ittiri, Sambuca, Cattolica Eraclea, Castelnuovo, Castel di Lucio, Cianfurro, Scampitella, Licodia Eubea e Villafrati, San Bellino and Fenis;
  • 12 132 kV stations acquired from SET Distribuzione;

Transformers
An additional 12 transformers went into operation compared with 31 December 2009, corresponding to a 3,750 MVA increase in transformation capacity. Specifically, there were 6 new 380 / 207 / 207 kV single-phase machines introduced at the Latina and Fiumesanto conversion stations, operations began at pole 2 of the SA.PE.I. connection, and 6 new 380 / 150 kV machines at the stations of Maida, Bisaccia 380, Brindisi Pignicelle and Santa Sofia were added.

Long distance power lines
In relation to power lines, the total length of three-phase lines has increased by 1,147 km as compared with 31 December 2009, whilst those of lines has increased by 986 km. More specifically, we note the start-up of pole 2 of the underwater 500 kV connection of SA.PE.I. between the stations of Latina and Fiumesanto for a total of 458.8 km and the acquisition from SET Distribuzione of 15 lines for a total of 171.7 km (of which: 4 at 132 kV, equal to 32.8 km; 11 at 60 kV, equal to 138.9 km). We would also point out that as of 31 December 2010, the lines and three-phase lines owned by the Parent also included those (32 lines for a total of 381 km) of some plants subject to urgent development and renewal works in the territorial operative areas of Milan, Padua, Florence and Naples, transferred from the subsidiary TELAT in March.