Primary activity

• Examination of power quality parameters at the points of connection of industrial facilities to the distribution network, as well as within the facilities themselves;
• Power quality parameter testing to identify the cause of disruptions in the operation of energy equipment
• Monitoring power quality in order to assess the technical conditions for connecting small power plants, biogas power plants, solar power plants, and prosumers to the distribution network (in accordance with the current Technical Guidelines and Regulations on Distribution System Operation);
• Assessment of power quality to provide input data for project documentation (e.g., design of reactive energy compensation, with and without filter plants);
• Evaluation of power quality parameters in accordance with the client's specific needs.

The Specialized Laboratory for Testing Power Quality is authorized to perform the following electrical tests on the main power supply busbars or the connections of the measuring group behind the measuring transformers at a substation or a plant, in accordance with the scope of certification. It complies with the following standards: SRPS EN 50160:2012 (equivalent to EN 50160:2010), SRPS EN 50160:2012/A1:2015 (equivalent to EN 50160:2010/A1:2015), and IEEE 141-1993.

• Determination of higher voltage harmonics, up to the 50th order;
• Determination of power supply frequency variations;
• Determination of supply voltage variations;
• Determination of fluctuations in supply voltage;
• Determining the flicker level
• Identifying supply voltage imbalances
• Measurement of the voltage's total distortion factor (THD), including higher harmonics up to the 40th order
• Power factor measurement;
• Measurement of active and reactive power (current sensors up to 100 A to 3000 A).