BS EN 60034-9:2005 PDF

1   Scope

This part of IEC 60034:

— specif ies test m ethods f or the determ ination of sound power level of rotating electrical m achines;

— specifies maximum A-weighted sound power levels for factory acceptance testing of network-supplied, rotating electrical machines in accordance with lEC 60034-1, having methods of cooling according to lEC 60034-6 and degrees of protection according to lEC 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);

• rated speed not greater than 3 750 min –1 .

— provides guidance for the determination of noise levels for a.c. cage induction motors supplied by converters.