NEN 10034-9
Rotating electrical machines - Part 9: Noise limits
| Organization: | NEN |
| Publication Date: | 1 May 1994 |
| Status: | inactive |
| ICS Code (Motors): | 29.160.30 |
| ICS Code (Noise emitted by machines and equipment): | 17.140.20 |
scope:
This standard specifies maximum permissible A-weighted sound power levels for rotating electrical machines complying with IEC 34-1, having methods of cooling according to IEC 34-6 and degrees of protection according to IEC 34-5, and having the following characteristics: - standard design, either a.c. or d.c., without special electrical mechanical, or acoustical modifications intended to reduce the noise level; - rated output from 1 kW (or kVA) to 5500 kW (or kVA); - speed not greater than 3750 rev/min.
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