This paper presents application of line surge arresters (LSA) on the different voltage level multi circuit overhead lines. Double shielded compact with and without distribution same tower is analyzed. Distribution has lower insulation level, meaning that almost all flashovers will happen circuit. Flashovers help to improve lightning performance transmission circuits. diverts fraction current al...

The paper considers the possibility of improving technical characteristics gas surge arresters for co-ordination insulation at low voltage, medium voltage and high levels. idea a arrester is based on application radioactive source 241Am in area cathode. Intensive ionization with alpha particles significantly increases number free electrons space between electrodes, which shortens time their tra...

power system overvoltages due to switching, lightning and other disturbances are the main problem for designers of the power transformers. once some frequencies of the incoming surges match with some of the natural frequencies of transformer winding, the resonance phenomenon is expected in transformer winding. the resonant overvoltages may destroy the insulation between turns and cause to insul...

This paper elaborates on several important outstanding issues in the state-of-art of overvoltage protection selection for modern wind farms. The lack of experience with this still-new technology, together with the inherent complexity of wind farm electrical systems, entails several unresolved issues pertinent to the topic of overvoltage protection, particularly in relation to lightning-initiate...

The paper presents a comparison of the performance of voltage-switching devices and voltage-limiting devices for late seventies-vintage SPDs as marketed and installed in service panels in the USA and in Europe. Artifacts in the response of a typical oscilloscope to a nearby gap sparkover, and the effect of lead dress inside the panels and outdoor installation are described. Predictably, the per...