According to the definition of energy efficiency given by the International Standard EN ISO 50001, "Energy efficiency is the ratio or other quantitative relationship between the output results expressed as characteristics, services, products, goods or energy and the input energy."
When we have electrical energies at the input and at the output, the energy efficiency is called electrical energy efficiency. Therefore, electrical efficiency is a ratio of electrical energy at the output to electrical energy at the input.
Evaluating efficiency according to the above definition of energy efficiency:
ηc,% = (ECMax/EGMax).100
Electrical energy efficiency is within the scope of the accredited service "Control of electricity consumption" and consists of:
- determination of the criteria for electrical energy efficiency according to the specifics of the client;
- identification of key energy consumption;
- determining the efficiency of energy flows that will change;
- installation of suitable measuring devices: on the power terminals - in the beginning of electrical system / load and for measuring the energy consumption in the system / load itself;
- performing instantaneous or for a certain period of time measurements of electrical quantities (voltages, currents, harmonics, powers, phase angles, power factor, analysis of the origin of disturbances, consumed energy);
- collection of measurement data, analysis, communication with the client, optimization steps.





