This is a step up transformer. Electricity is transmitted at high voltages (110 kV or above) to reduce the energy lost in long distance transmission.
Seo tionndaire suas. Thèid dealan a chur le bholtaids àrd (110 kV no nas àirde) ach nach tèid cus cumhachd air chall nuair a chuirear an dealan thar astair fhada.