This part of IEC 60034:- specifies test methods for the determination of sound power level of rotating electrical machines; - specifies maximum A-weighted sound power levels for factory acceptance testing of rotating electrical machines in accordance with IEC 60034-1, having methods of cooling according to IEC 60034-6 and degrees of protection according to IEC 60034-5, and having the following characteristics: - standard design, either a.c. or d.c., without additional special electrical, mechanical, or acoustical modifications intended to reduce the sound power level; - rated output from 1 kW (or kVA) up to and including 5 500 kW (or kVA); -speed not greate