Maximum permissible sound power level, corrected for characteristic A,Lw according to GOST 16372(МЭК60034-9) for electric motors of the 4AMU series, 6AMU, 4AMSU, 4AMRU, 4AMNU, AMU, AIM, AIMM, AIU, АИУМ, 2AIMM, 2AIU is indicated in the tables (tables 1 – 12). Sound power level Lwа is determined by calculation in accordance with GOST 11929(ISO-3475).
Allowable vibration values of electric motors of the 4AMU series, AIRU, 5AMU, 6AMU, 4AMSU, 4AMRU, 4AMNU, AMU, AIMM, AIMM, AIU and AIUM, corresponds to category N according to GOST 20815 (МЭК60034-14)
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