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BS EN IEC 60034-9:2024 Rotating electrical machines - Noise limits, 2024
- undefined
- Annex ZA (normative)Normative references to international publicationswith their corresponding European publications [Go to Page]
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Methods of measurement
- 5 Test conditions [Go to Page]
- 5.1 Machine mounting [Go to Page]
- 5.1.1 Precautions
- 5.1.2 Resilient mounting
- 5.1.3 Rigid mounting
- 5.2 Test operating conditions
- 6 Sound power level limits
- 7 Determination of sound pressure level
- 8 Declaration and verification of sound power values
- Tables [Go to Page]
- Table 1 – Maximum A-weighted sound power level, LWA in dB, at no-load (excluding motors according to Table 2 and Table 3)(Method of cooling, IC code, see IEC 60034-6,Method of protection, IP code, see IEC 60034-5)
- Table 2 – Maximum A-weighted sound power level, LWA in dB, at no-load, 50 Hz, sinusoidal supply (for single speed three-phase cage induction motors)
- Table 3 – Maximum A-weighted sound power level, LWA in dB, at no-load, 60 Hz, sinusoidal supply (for single speed three-phase cage induction motors)
- Table 4 – Expected increase, over no-load condition, in A-weighted sound power levels, ΔLWA in dB, for rated load condition(for motors according to Table 2 and Table 3)
- Annex A (informative) Typical values for measurement surface index [Go to Page]
- Table A.1 – Typical values for measurement surface index for the conversion from sound power level to sound pressure level based on using parallelepiped measurement surface according to ISO 3744
- Annex B (informative) Information on typical noise increments caused by converter supply
- Figures [Go to Page]
- Figure B.1 – Frequency spectrum of the currents at the output terminalsof a 6‑pulse block-type current-source converter f1 = 50 Hz
- Figure B.2 – Frequency spectrum of the voltages at the terminals of a type A voltagesource converter (characterized by pronounced spikes closeto the switching frequency and its multiples) f1 = 50 Hz, fs = 3 kHz
- Figure B.3 – Frequency spectrum of the voltages of a type B voltage-source converter (characterized by a broad voltage spectrum without pronounced spikes) f1 = 50 Hz, fs average = 4,5 kHz
- Table B.1 – Resonance frequencies of vibration mode r
- Table B.2 – Increments of A-weighted noise values
- Bibliography [Go to Page]
