AS/NZS 61000.3.3:1998

1 - AS/NZS 61000.3.3:1998 ELECTROMAGNETIC COMPATIBILITY (EMC) - LIMITS-LIMITATION OF VOLTAGE FLUCTUATIONS AND FLICKER IN LOW...
4 - PREFACE
6 - CONTENTS
9 - 1 Scope
9 - 2 Normative references
10 - 3 Definitions
10 - 3.1 R.M.S. voltage shape, U( t):
10 - 3.2 voltage change characteristic, D U( t):
10 - 3.3 maximum voltage change, D U max :
10 - 3.4 steady-state voltage change, D U c :
10 - 3.5 voltage fluctuation:
10 - 3.6 flicker:
10 - 3.7 short-term flicker indicator, P st :
11 - 3.8 long-term flicker indicator, P lt :
11 - 3.9 flickermeter:
11 - 3.10 flicker impression time, t f :
11 - 4 Assessment of voltage fluctuations and flicker
11 - 4.1 Assessment of a relative voltage change, “d”
11 - 4.2 Assessment of the short-term flicker value, P st
12 - 4.2.1 Flickermeter
12 - 4.2.2 Simulation method
12 - 4.2.3 Analytical method
13 - 4.2.4 Use of P st = 1 curve
13 - 4.3 Assessment of long-term flicker value, P lt
13 - 5 Limits
14 - 6 Test conditions
14 - 6.1 General
14 - 6.2 Measurement accuracy
15 - 6.3 Test supply voltage
15 - 6.4 Reference impedance
15 - 6.5 Observation period
16 - 6.6 General test conditions
21 - Annex A - Application of limits and type test conditions for specific equipment
21 - A.1 Test conditions for cookers
22 - A.2 Test conditions for lighting equipment
22 - A.3 Test conditions for washing machines
22 - A.4 Test conditions for tumbler dryers
23 - A.5 Test conditions for refrigerator.
23 - A.6 Test conditions for copying machines, laser printers and similar appliances
23 - A.7 Test conditions for vacuum cleaners
23 - A.8 Test conditions for food mixers
23 - A.9 Test conditions for portable tools
23 - A.10 Test conditions for hairdryers
23 - A.11 Test conditions for consumer electronics products
24 - A.12 Test conditions for direct water heaters
25 - ANNEX ZZ - VARIATION TO IEC 61000-3-3:1994 FOR APPLICATION IN AUSTRALIA AND NEW ZEALAND

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 technically equivalent to and has been reproduced from IEC 61000-3-3:1994.

This section of IEC 1000-3 is concerned with the limitation of voltage fluctuations and flicker impressed 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 section is applicable to electrical and electronic equipment having an input current up to and including 16 A per phase and intended to be connected to public low-voltage distribution systems of between 220 V and 250 V at 50 Hz line to neutral. The tests according to this section are type tests. Particular test conditions are given in annex A and the test circuit is shown in figure 1.NOTESThe limits in this section are based mainly on the subjective severity of the flicker imposed on the light from 230 V/60 W coiled-coil filament lamps by fluctuations of the supply voltage. For systems with nominal voltages less than 220 V, line to neutral and/or frequency of 60 Hz, the limits and reference circuit values have not yet been considered. Special equipment which is not widely used and is designed in such a way that it is unable to comply with the requirements [limits] of this section may be subject to installation restrictions requiring the consent of the supply authority before connection.A guide to the assessment of such equipment is given in technical report IEC 1000-3-5.

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