Scientific paper ID 1870 : 2019/3

In the investigated industrial site, there is a high consumption of reactive energy. A big part of the electrical equipment s: transformers, furnaces with frequency inverters, rectifiers, DC motors, AC asynchronous motors, inverters. Due to the specific production processes in the factory, in the majority of the working cycles duration, the transformers are on low load or no load condition. There are a number of reasons leading to reactive currents and harmonics generation in the electrical distribution system resulting in current and voltage harmonic distortion. Therefore the quality of electrical energy is getting worse and the electrical energy consumption is rising.

As the copper and copper alloys market demand is increasing all the time, the factory productivity must be increased too. New machines must be installed and some of the old ineffective machines have to be replaced with new ones. Ultimately, this would the expansion of the existing electrical distribution circuit.

The report offers information about „Sofia Med“ factory and its electrical system. It also discusses the need for expansion of the electrical distribution system, in order to ensure electrical supply for the new equipment, as well as the necessity for improvement of the energy efficiency by means of local reactive power compensators.