Due to its importance to the electric power system, transformers are subjected to normalized electric tests in order to guarantee its proper functioning in operation conditions, one of which is the lightning impulse test. ...

Compact Distribution Network (CDN) provides a great reliability for the medium voltage electric system due to the polyethylene protection present in the cables, avoiding system interruptions caused by non-permanent contact ...

Ferroresonance oscillations involving voltage transformers (VTs) have become a growing phenomenon, especially in wind parks. The search for practical analysis of ferroresonance has motivated the development of a specialized ...

Installed surge arresters are subjected to different types of overvoltages, and the varistors, which are their active element, must be able to not only absorb the energy from these overvoltages, but also present degradation ...

The management of urban solid waste is currently one of society's greatest problems, because when they do not receive an adequate final disposal, they cause major health, social and environmental problems. Therefore, ...

A large number of power system apparatus around the world are over 30 years old in operation. Replacement of power system assets involves high investments. On the other hand, the failure of such equipment causes a high ...

Silicone rubber (SIR) is used in the manufacture of insulators for transmitting electrical energy. The addition of some additives can efficiently improve the resistance to thermal degradation of SIR. In this work, an ...