EN 61000-3-3 Limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with rated current ≦16A Purpose and application of the test Purpose: This standard sets limits on voltage fluctuations and flicker in public low-voltage systems Application: This standard applies to electrical and electronic equipment with an input current of not more than 16A per phase and intended to be connected to public low-voltage distribution systems with a voltage of 220~250V (phase to neutral) and a frequency of 50Hz Terminology Effective value (RMS) voltage waveform U(t) ---- RMS voltage sharp U(t) Time function of the effective value (rms) voltage change evaluated successively in successive fundamental voltage half-cycles ˙ Voltage change characteristic Umax ---Maximun voltage change Umax The difference between the maximum effective value and the minimum value of the voltage change characteristic ˙ Steady-state voltage changes U(c) --Steady-state voltage changes U(c) The voltage difference between two adjacent steady-state voltages separated by at least one voltage variation characteristic
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