1. High Voltage and Superconductivity Laboratory, Department of Electrical Power and Machines Engineering, Faculty of EngineeringTanta UniversityTantaEgypt
2. Department of Electrical Power and Machines Engineering, Faculty of Engineering at ShoubraBenha UniversityCairoEgypt
3. Department of High Voltage Networks, Faculty of Energy EngineeringAswan UniversityAswanEgypt
4. Department of Mathematics and Engineering Physics, Faculty of Engineering at ShoubraBenha UniversityCairoEgypt