Slovenia has been providing its neighbor, Italy, with power since 2010. The phase shifter transformers (PSTs) of Slovenian grid operator ELES control the flow of powerful electrical loads between the countries, thus guaranteeing the safe, reliable interruption-free transfer or exchange of electricity. As Aleksander Polajner, Head of the High Voltage Device department at ELES, explains. "In the event of an unplanned failure, in the worst-case scenario, our lights or our neighbor’s lights go out."