Lightning protection, earthing and surge protection of base transmission stations
An effective lightning protection design for a telecommunication facility requires an integrated approach to a number of key factors: • Protection against direct lightning strikes • Effective earth termination network for discharge of lightning current • Integration of power supply and lightning protection earthing systems • Extensive equipotential bonding to prevent electric shock • Mitigation for ground potential rise • Prevention of conducted surges to equipment cabin • Mitigation of LEMP This paper examines the challenges and solutions in the integration of lightning protection, earthing and surge protection for a base transmission station comprising a telecom tower and an equipment cabin, taking into consideration external power source via overhead lines.
Determination of the Electric Capacitance of the Overvoltage Protective Shield of an Electric Transformer
The paper presents an approach for computing the electric capacitance of the overvoltage protective shield mounted in electric transformers. This is a valuable parameter within the high frequency equivalent electric circuit of a transformer stressed by an overvoltage wave propagation due to a lightning strike event. The finite element analysis method is applied to solve the resulting electrostatics problem.
Grounding and Shielding in Facilities
Basics. An Introduction to Power Grounding. Power Grounding. Equipment and Hardware. Power Grounding. Electromagnetic Interference (EMI). Facility Considerations. More Basics of EMI. Index.