BS 7484:1991
Current
The latest, up-to-date edition.
Guide to electromagnetic environment for low-frequency conducted disturbances and signalling in public power supply systems
Hardcopy , PDF
English
31-10-1991
Committees responsible
National foreword
1. Scope
2. Normative references
3. Definitions
4. Purpose of specifying electromagnetic compatibility
levels
5. Harmonics
6. Interharmonics
7. Voltage fluctuations
8. Voltage dips and short supply interruptions
9. Voltage unbalance
10. Mains signalling
11. Power frequency variation
12. D.C. components
Figures
1. Coordination between the disturbance level in the
environment, the compatibility level, the immunity
level, the susceptibility level
2. Superposition of harmonic currents
3. Sinusoidal voltage fluctuation of 10 Hz frequency
4. Illustration of peak voltage changes
5. Some illustrations of voltage fluctuation waveforms
6. Illustration of a voltage dip (triangle U1) or a
voltage interruption (triangle U2 = 100%)
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