International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Much of the technical equipment in energy, industry, commerce and the public sector (electronic equipment, electric motors, furnaces, chargers, uninterruptible power supplies, etc.) are inherently non-linear loads and are sources of harmonic distortion of currents. Non-linear loads adversely affect all components of the power system: they increase losses in transformers and electric motors by thermal loading their windings, increasing dielectric and/or mechanical losses and generally reduce the efficiency of the electrical system. The paper deals with operation of a power transformer that supplies combined non-linear load in a public building

One of the prerequisites for achieving the long-term goal of better atmospheric air quality is the transition to a low carbon economy and more sustainable transport through the increased use of electric vehicles. Statistics show that transport generates over 14% of global greenhouse gas emissions and is the main sector in the EU where this indicator is still increasing.
Electric vehicle technology is constantly evolving and they are gaining in efficiency. Generally, electromobility is about charging, managing and using energy. The success of the automotive industry in the future will be determined by how quickly the development of traction motors and batteries will continue, as well as the charging infrastructure.
In order to ensure the normal operation of electric vehicles, it is necessary to build an adequate infrastructure of charging stations. The paper deals with the technical features and trends of charging stations for electric vehicles. The results are a summary and assessment of extending the boundaries of electromobility, contributing to a more sustainable future. Relevant conclusions have been done.