AS/NZS 61000.3.3:2003

1 - AS/NZS 61000.3.3:2003 ELECTROMAGNETIC COMPATIBILITY (EMC) - LIMITS-LIMITATION OF VOLTAGE CHANGES, VOLTAGE FLUCTUATIONS AND...
4 - PREFACE
6 - CONTENTS
7 - 1 Scope
7 - 2 Normative references
8 - 3 Definitions
8 - 3.1 r.m.s. voltage shape,
8 - 3.2 voltage change characteristic,
9 - 3.3 maximum voltage change characteristic,
9 - 3.4 steady-state voltage change,
9 - 3.5 voltage fluctuation
9 - 3.6 flicker
9 - 3.7 short-term flicker indicator,
9 - 3.8 long-term flicker indicator,
9 - 3.9 flickermeter:
9 - 3.10 flicker impression time,
9 - 3.11 conditional connection
10 - 3.12 interface point
10 - 4 Assessment of voltage changes, voltage fluctuations and flicker
10 - 4.1 Assessment of a relative voltage change,
10 - 4.2 Assessment of the short-term flicker value,
11 - 4.2.1 Flickermeter
11 - 4.2.2 Simulation method
11 - 4.2.3 Analytical method
12 - 4.2.4 Use of Pst = 1 curve
12 - 4.3 Assessment of long-term flicker value,
12 - 5 Limits
13 - 6 Test conditions
13 - 6.1 General
14 - 6.2 Measurement accuracy
14 - 6.3 Test supply voltage
14 - 6.4 Reference impedance
14 - 6.5 Observation period
15 - 6.6 General test conditions
20 - Annex A - Application of limits and type test conditions for specific equipment
20 - A.1 Test conditions for cookers
21 - A.2 Test conditions for lighting and similar equipment
21 - A.3 Test conditions for washing machines
22 - A.4 Test conditions for tumbler dryers
22 - A.5 Test conditions for refrigerators
22 - A.6 Test conditions for copying machines, laser printers and similar appliances
22 - A.7 Test conditions for vacuum cleaners
22 - A.8 Test conditions for food mixers
22 - A.9 Test conditions for portable tools
22 - A.10 Test conditions for hairdryers
23 - A.11 Test conditions for consumer electronics products
23 - A.12 Test conditions for direct water heaters
23 - A.13 Test conditions for audio-frequency amplifiers
23 - A.14 Test conditions for air conditioners, dehumidifiers, heat pumps, and commercial refrigerating equipment
24 - A.15 Test conditions for arc welding equipment and allied processes
27 - Annex B - Test conditions and procedures for measuring dmax voltage changes caused by manual switching
27 - B.1 Introduction
27 - B.2 Procedure

Specifies the limitation of voltage fluctuations and flicker in low-voltage supply systems for equipment with a rated input current less than or equal to 16 A. This Standard is identical with and has been reproduced from IEC 61000-3-3:2001.

This part of AS/NZS 61000.3 is concerned with the limitation of voltage fluctuations and flickerimpressed on the public low-voltage system.It specifies limits of voltage changes which may be produced by an equipment tested under specified conditions and gives guidance on methods of assessment.This part of AS/NZS 61000 is applicable to electrical and electronic equipment having an input current equal to or less than 16 A per phase, intended to be connected to public low-voltage distribution systems of between 220 V and 250 V line to neutral at 50 Hz, and not subject toconditional connection.Equipment which does not comply with the limits of this part of AS/NZS 61000 when testedwith the reference impedance Z ref of 6.4, and which therefore cannot be declared compliantwith this part, may be retested or evaluated to show conformity with IEC 61000-3-11.Part 3-11 is applicable to equipment with rated input current 75 A per phase and subject toconditional connection.The tests according to this part are type tests. Particular test conditions are given in annex Aand the test circuit is shown in figure 1.NOTE The limits in this part of AS/NZS 61000 are based mainly on the subjective severity of flicker imposed on the light from 230 V/60 W coiled-coil filament lamps by fluctuations of the supply voltage. For systems with nominal voltage less than 220 V line to neutral and/or frequency of 60 Hz, the limits and reference circuit values are under consideration.

First published AS 2279.3-1985.Second edition 1991.Jointly revised and redesignated AS/NZS 61000.3.3:1998.Second edition 2003. First published AS 2279.3-1985. Second edition 1991. Jointly revised and redesignated AS/NZS 61000.3.3:1998. Second edition 2003.