Ann: Gulf Signs Power Purchase Agreement, page-46

"And also confirms my suspicion in my previous post that in any other location they would be force into the HV classification. Thus into a cheaper power tarif which may have been taken into consideration in the contract. (Assumptions again like all the talk of power costs here)"

Have to correct you here, its the power (not the voltage) which determines the tariff, 14 MVA with 2 furnaces at present. Whilst the site is drawing between 0.2 MVA and 30 MVA, they will be on the B3/I3 tariff, this is irrespective of the site connection voltage.

And these furnaces can't be supplied by a HV line (>= 25 kV), it will break them. They're rated at 20 kV, and therefore have to be supplied by a 20 kV line, which is classified as MV.