1. School of Electrical & Computer Engineering, Aristotle University of Thessaloniki,High Voltage Laboratory,Greece
2. School of Electrical & Computer Engineering, Aristotle University of Thessaloniki,Laboratory of Materials for Electrotechnics,Greece
3. University of Patras,High Voltage Laboratory,Electrical & Computer Engineering Department,Greece
4. Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc,Czech Republic
5. Raycap SA Industrial Area of Drama,Research & Development Department,Drama,Greece,66100