Aim: Electrical energy goes through many different stages from its generation to delivery to the end user. In the transmission and distribution processes of the electrical energy, the energy losses may occur. It is essential to seek appropriate solutions to minimise the electrical power losses and to eliminate all parameters that impair the quality of energy so as to help the electrical network system can operate efficiently, economically, reliably and sustainably. In this study, a medium voltage distribution network and of all parameters were modelled and examined in the computer environment. Modelling and analysis processes were done through the DigSilent Power Factory program which can perform power system analyses. Method: The study consists of three stages. In the first stage, Rabak Feeder modelling of Izmit TM and some analyses of this feeder were made in the DigSilent program. In the second stage, all the underground aluminium conductors in Rabak Feeder were replaced with the superconductors and were modelled and analysed in the DigSilent Power Factory program. In the third stage, Rabak Feeder was redesigned with the superconductors and analyses were made. Results: As a result of these analyses, all parameters of the models were examined. The parameters obtained from the existing and the other two-stage models were compared. These comparisons show that the efficiency of the system increases while the voltage drops and energy losses both decrease when the superconductors are used. Conclusion: The use of the superconductors has increased the efficiency of the system by reducing the voltage drops and energy losses.