I found it and my memory served me well.

here are the details and the link.

Quote

Commissioning year: 1965 (mercury arc valves)
Power rating: 600 MW
No. of poles: 2
DC voltage: ± 250 kV
Pole 2 after 1991
Commissioning year: 1991 (thyristor valves)
Power rating: Nominal 560 MW,
Continuous overload: 700 MW
DC voltage: -350 kV
Pole 1A+1B and 2 after 1992
Commissioning year: 1992 (hybrid sceme)
Power rating: 1240 MW
DC voltage: +270 and -350 kV
Complete transmission
Length of DC submarine cables: 42 km
Length of DC overhead line: 575 km
Main reason for choosing HVDC: Long distance, including sea crossing

http://www.abb.com/cawp/gad02181/c1256d71001e0037c125683400270fa6.aspx



Cheers
Raymond

The product of rotation, excitation and flux produces electricty.