March 25 (SeeNews) - Montenegro's power transmission system operator Crnogorski Elektroprenosni Sistem (CGES) has signed a 7.9 million euro ($9.2 million) contract with a consortium of local firm XEnergy and Turkey's Astor Enerji for the supply of two power transformers under a 36 million euro project for the upgrade of the Brezna substation (SS), the European Bank for Reconstruction and Development (EBRD) said.