SN EN 61000-3-3 : 1995 AMD 2 2005

Committees responsible
National foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
   3.1 R.M.S. voltage shape, U(t)
   3.2 Voltage change characteristic, delta U(t)
   3.3 Maximum voltage change, delta U max
   3.4 Steady-state voltage change, delta U c
   3.5 Voltage fluctuation
   3.6 Flicker
   3.7 Short-term flicker indicator, P[st]
   3.8 Long-term flicker indicator, P[lt]
   3.9 Flickermeter
   3.10 Flicker impression time, tf
4 Assessment of voltage fluctuations and flicker
   4.1 Assessment of a relative voltage change, "d"
   4.2 Assessment of the short-term flicker value, P[st]
       4.2.1 Flickermeter
       4.2.2 Simulation method
       4.2.3 Analytical method
             4.2.3.1 Description of the analytical
                     method
             4.2.3.2 Shape factor
       4.2.4 Use of Pst = 1 curve
   4.3 Assessment of long-term flicker value, P[lt]
5 Limits
6 Test conditions
   6.1 General
   6.2 Measurement accuracy
   6.3 Test supply voltage
   6.4 Reference impedance
   6.5 Observation period
   6.6 General test conditions
Annex
A Application of limits and type test conditions for
   specific equipment
ZA (normative) Other international publications
   quoted in this standard with the reference of the
   relevant European publications

Deals with the limitation of voltage fluctuations and flicker impressed on the public low-voltage system. Specifies limits of voltage changes which may be produced by an equipment tested under specified conditions and gives advice on assessment methods. Applies to electrical and electronic equipment having an input current up to and including 16 A per phase and meant to be connected to public low-voltage distribution systems of between 220 V and 250 V at 50 Hz line to neutral.