Ok, thanks. I can't wait to see photos of the substation.
In Poland we have several voltage levels
low : 230V (1- phase) or 400V (3-phase) average : 6kV, 10kV, 15kV, 20kV high: 110kV, 220kV and 400kV There is one 750kV connect with Ukraina but inactive. Frequency 50Hz.
And one cable connection HVDC 450kV with Sweden.
[This message has been edited by Elektroinstalacje (edited 02-05-2007).]