Russia’s IDGC begins reconstruction of 110/35/6 kV Kostroma-1 substation September 8, 2015 | Europe News Russia's Interregional Distribution and Grid Company (IDGC) of the Centre has commenced reconstruction of the 110/35/6 kV Kostroma-1 substation. This content is available to only paying subscribers. Username or E-mail Password Remember Me Forgot Password