Table of Contents

1 -  AS/NZS 61000.2.12:2003 ELECTROMAGNETIC COMPATIBILITY(EMC) - ENVIRONMENT-COMPATIBILITY LEVELS FOR LOW-FREQUENCY CONDUCTED...
4 -  PREFACE
6 -  CONTENTS
7 -  1 Scope and object
8 -  2 Normative references
8 -  3 Terms and definitions
8 -  3.1 General definitions
8 -  3.1.1 (electromagnetic) disturbance
8 -  3.1.2 disturbance level
9 -  3.1.3 electromagnetic compatibility
9 -  3.1.4 (electromagnetic) compatibility level
9 -  3.1.5 planning level
9 -  3.1.6 point of common coupling PCC
9 -  3.2 Phenomena related definitions
10 -  3.2.1 fundamental frequency
10 -  3.2.2 fundamental component
10 -  3.2.3 harmonic frequency
10 -  3.2.4 harmonic component
10 -  3.2.5 interharmonic frequency
10 -  3.2.6 interharmonic component
11 -  3.2.7 total harmonic distortion THD
11 -  3.2.8 voltage unbalance (imbalance)
11 -  4 Compatibility levels
11 -  4.1 General comment
12 -  4.2 Voltage fluctuations and flicker
12 -  4.3 Harmonics
13 -  4.4 Interharmonics and voltage components at frequencies above that of the 50 th harmonic
13 -  4.5 Voltage dips and short supply interruptions
14 -  4.6 Voltage unbalance
14 -  4.7 Transient overvoltages
14 -  4.8 Temporary power frequency variation
14 -  4.9 DC component
14 -  4.10 Mains signalling
15 -  4.10.1 Ripple control systems (110 Hz to 3 000 Hz)
16 -  4.10.2 Medium-frequency power-line carrier systems (3 kHz to 20 kHz)
16 -  4.10.3 Radio-frequency power-line carrier systems (20 kHz to 148,5 kHz)
16 -  4.10.4 Mains-mark systems
17 -  Annex A - The function of compatibility levels and planning levels in EMC
17 -  A.1 The need for compatibility levels
17 -  A.2 Relation between compatibility level and immunity levels
18 -  A.3 Relation between compatibility level and emission limits
19 -  A.4 Planning levels
20 -  A.5 Illustration of compatibility, emission, immunity and planning levels
21 -  Annex B - Discussion of some disturbance phenomena
21 -  B.1 Resolution of non-sinusoidal voltages and currents
23 -  B.2 Interharmonics and voltage components at frequencies above that of the 50th harmonic
25 -  B.3 Voltage dips and short supply interruptions
26 -  B.4 Transient overvoltages
26 -  B.5 DC component
28 -  Bibliography

Abstract

Specifies compatibility levels for low-frequency conducted disturbances and signalling in public medium-voltage power supply systems. This Standard is identical with and has been reproduced from IEC 61000-2-12:2003.

RECONFIRMATION NOTICE
Technical Committee EL-034 has reviewed the content of this publication and in
accordance with Standards Australia procedures for reconfirmation, it has been determined
that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original
date of publication. Users are advised to ensure that they are using the latest versions of
such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for
reconfirmation on 31 October 2013.
Approved for reconfirmation in New Zealand on behalf of the Standards Council of
New Zealand on 25 October 2013.
The following are represented on Technical Committee EL-034:
Australian Chamber of Commerce and Industry
Australian Industry Group
Australian Information Industry Association
Bureau of Steel Manufacturers of Australia
Consumer Electronics Suppliers Association
Consumers Federation of Australia
Electrical Regulatory Authorities Council
Electricity Engineers Association (New Zealand)
Energy Networks Association
Engineers Australia
Lighting Council Australia
Ministry of Business, Innovation and Employment (NZ)
National Measurement Institute
New Zealand Coordinating Committee on Power & Telecommunication Systems
New Zealand Electric Fence Energiser Manufacturers Standards WG
University of Canterbury New Zealand
University of Wollongong

Scope

This part of AS/NZS 61000 is concerned with conducted disturbances in the frequency range
from 0 kHz to 9 kHz, with an extension up to 148,5 kHz specifically for mains signalling
systems. It gives compatibility levels for public medium voltage a.c. distribution systems
having a nominal voltage between 1 kV and 35 kV and a nominal frequency of 50 Hz or 60 Hz
(see IEC 60038).
Compatibility levels are specified for electromagnetic disturbances of the types which can be expected in public medium voltage power supply systems, for guidance in:
a) the limits to be set for disturbance emission into public power supply systems (including
the planning levels defined in 3.1.5);
b) the immunity limits to be set by product committees and others for the equipment
exposed to the conducted disturbances present in public power supply systems.
The disturbance phenomena considered are:
• voltage fluctuations and flicker;
• harmonics up to and including order 50;
• inter-harmonics up to the 50 th harmonic;
• voltage distortions at higher frequencies (above 50 th harmonic);
• voltage dips and short supply interruptions;
• voltage unbalance;
• transient overvoltages;
• power frequency variation;
• d.c. components;
• mains signalling.
Most of these phenomena are described in IEC 61000-2-1. In cases where it is not yet
possible to establish compatibility levels, some information is provided.
The medium-voltage systems covered by this standard are public distribution systems
supplying either:
a) private installations in which equipment is connected directly or through transformers, or
b) substations feeding public low-voltage distribution systems.
The compatibility levels specified in this standard apply at the point of common coupling in the case of (a) and at the medium-voltage terminals of the substation in the case of (b). See Clause 4.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	This standard has been reconfirmed in Australia in 2013 and remains current in New Zealand. Reconfirmation Notice 29-11-2013
Pages
ISBN
Committee	EL-034
Supersedes	DR 03417 CP