The level assessment of voltage higher harmonics in the electrical network during the operating of frequency drive Altivar 61

The results of the study of the influence of frequency drives and their input filters on the number and value of the harmonic coefficients of voltage of the shop power supply system of the branch "Gomel bakery" on the example of the electric drive Altivar 61, operating in the supply system for supply ventilation of a sorting mill are presented. The conformity of the power quality indicators to the requirements of GOST 32144-2013 in the Altivar 61 electric drive network was evaluated. The values of the harmonic components of the voltage in the network in question were measured and evaluated before the Altivar 61 drive was switched on, without the input filter and with the Altivar 31 / Lexium 05 input filter. It is shown that the effect of the Altivar 31 / Lexium 05 filter is ambiguous, since it can both increase the value of some higher harmonic voltage components and increase it.