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AS/NZS 61000.4.7:1999

AS/NZS 61000.4.7:1999

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Electromagnetic compatibility (EMC) Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto

Available format(s)

Hardcopy , PDF 1 User , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

06-30-2017

Published date

02-05-1999

Publisher

Standards Australia

Preview

1 - AS/NZS 61000.4.7:1999 ELECTROMAGNETIC COMPATIBILITY (EMC) - TESTING AND MEASUREMENT TECHNIQUES-GENERAL GUIDE ON HARMONICS AND
4 - PREFACE
6 - CONTENTS
9 - 1 Scope
9 - 2 Normative references
10 - 3 Definitions, symbols and indices
10 - 3.1 voltage
10 - 3.2 current
10 - 3.3 definitions related to harmonics:
11 - 3.4 interharmonics:
11 - 3.5 frequency-domain instrumentation:
11 - 3.6 time-domain instrumentation:
11 - 3.7 Symbols
11 - 3.8 Indices
12 - 4 General classification of instrumentation
12 - 4.1 Characteristics of the signal to be measured
13 - 4.2 Accuracy classes of instrumentation
13 - 4.3 Types of measurement
13 - 5 Common requirements for all types of instrumentation
13 - 5.1 Requirements for input circuits
13 - 5.1.1 Voltage input circuit
14 - 5.1.2 Current input circuit
15 - 5.2 Accuracy requirements for instruments
15 - 5.3 Accuracy requirements for external voltage- and current-transformers
17 - 6 Special requirements for frequency-domain instrumentation
17 - 6.1 General
17 - 6.2 Quasi-stationary harmonics
18 - 6.3 Fluctuating harmonics
18 - 6.4 Rapidly changing harmonics
18 - 6.5 Output requirements
18 - 7 Special requirements for time-domain instrumentation
18 - 7.1 Fast Fourier Transform (FFT) instrumentation - General concepts
20 - 7.1.1 Quasi-stationary harmonics
20 - 7.1.2 Fluctuating and rapidly changing harmonics
21 - 7.2 Digital filters
21 - 7. 3 Operation-mode and output requirements
22 - 8 Evaluation methods
22 - 8.1 Output signal filtering
22 - 8.1.1 Low-pass filter for frequency-domain instruments
22 - 8.1.2 Filter for time-domain instruments
23 - 8.2 Future methods
23 - 9 Voltage harmonic surveys in supply systems
23 - 9.1 Types of measurement equipment
23 - 9.2 Window- width and basic requirements for FFT- instrumentation
24 - 9.3 Time ranges for statistical handling of measured values
25 - 9.3.1 Very-short-time interval (first integrating time range)
25 - 9.3.2 Short-time interval (second integrating time range)
25 - 9.3.3 Long-time interval (third integrating time range)
26 - 9.3.4 Day interval (24 h)
26 - 9.3.5 Week or longer interval
26 - 10 Special cases of measurement
27 - 10.1 Phase-angle measurement
28 - 10.2 Distortion measurements
28 - 10.2.1 Distortion factors
29 - 10.2.2 Psophometric weighting
29 - 10.3 Symmetrical components measurement
30 - 10.4 Interharmonics measurement
31 - 11 Effect of environment - Immunity tests
31 - 11.1 Temperature and humidity
32 - 11.2 Instrument supply voltage
32 - 11.3 Common mode interference voltage
32 - 11.4 Static electricity discharges
32 - 11.5 Electromagnetic fields
37 - Annex A - Bibliography
38 - Annex ZZ - List of variations to IEC 61000-4-7:1991 for application in Australia and New Zealand

Provides guidance on the instrumentation intended for measuring voltage or current components with frequencies in the range of d.c. to 2500 Hz which are superimposed on the voltage or current at the power supply frequency. The Standard also provides guidance on measurement instrumentation intended for testing individual items of equipment in accordance with emission limits given in Standards as well as for the measurement of harmonic voltages and currents in actual supply systems. Frequency domain and time domain instrumentation are both considered in this Standard. This Standard is technically equivalent to and has been reproduced from IEC 61000-4-7:1991.

This guide is applicable to instrumentation intended for measuring voltage or current components with frequencies in the range of d.c. to 2 500 Hz which are superimposed on the voltage or current at the power supply frequency. This guide is also applicable to measurement instrumentation intended for testing individual items of equipment in accordance with emission limits given in standards (e.g. harmonic current limits as given in IEC 555-2) as well as for the measurement of harmonic voltages and currents in actual supply systems. The survey of harmonics in the power supply systems is of particular concern. The test procedure for measurements and test conditions for emission testing are not dealt with in this guide; these requirements are included in the particular standards. Harmonics of the supply frequency are of special concern but components at other frequencies (interharmonic components) may also have to be measured. Frequency-domain and time-domain instrumentation are both considered in this guide. Tentative recommendations are also given for the statistical analysis of harmonic measurements in the supply in order to make the comparison of results easier.For fluctuating and rapidly changing harmonics, a distinction is made between the measurement process itself with its relatively small time constant, and the evaluation process which handles the measurement data in a defined manner in order to compare the results with stated limits, acceptance or reference values.

Committee
EL-034
DocumentType
Standard
ISBN
0 7337 2483 3
Pages
30
PublisherName
Standards Australia
Status
Superseded
SupersededBy
Supersedes
UnderRevision

Standards Relationship
IEC 61000-4-7:1991 Identical

First published as AS/NZS 61000.4.7:1999.

AS/NZS 61000.3.2:1998 Electromagnetic compatibility (EMC) Limits - Limits for harmonic current emissions (equipment input current less than or equal to 16 A per phase)

AS/NZS 61000.3.6:2001 Electromagnetic compatibility (EMC) Limits - Assessment of emission limits for distorting loads in MV and HV power systems (IEC 61000-3-6:1996, MOD)
AS 60146.2-2001 Semiconductor converters - Self-commutated semiconductor converters including direct d.c. converters
AS/NZS 61000.4.30:2007 Electromagnetic compatibility (EMC) Testing and measurement techniques - Power quality measurement methods
AS/NZS 61000.4.1:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Overview of IEC 61000-4 series
AS 61400.21-2006 Wind turbines - Measurement and assessment of power quality characteristics of grid connected wind turbines
AS 1418.1-2002 Cranes, hoists and winches General requirements
AS/NZS 61000.2.2:2003 Electromagnetic compatibility (EMC) Environment - Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems (Reconfirmed 2013)
AS/NZS 61000.3.2:2003 Electromagnetic compatibility (EMC) Limits - Limits for harmonic current emissions (equipment input current less than or equal to 16 A per phase)
AS 61850.7.4-2005 Communication networks and systems in substations Basic communication structure for substation and feeder equipment - Compatible logical node classes and data classes
AS/NZS 61000.3.12:2006 Electromagnetic compatibility (EMC) Limits - Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current greater than 16 A and less than or equal to 75 A per phase
AS 61800.2-2004 Adjustable speed electrical power drive systems General requirements - Rating specifications for low voltage adjustable frequency a.c. power drive systems
AS/NZS 61000.4.13:2006 Electromagnetic compatibility (EMC) Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests
AS/NZS 3947.4.3:2000 Low-voltage switchgear and controlgear Contactors and motor-starters - A.C. semiconductor controllers and contactors for non-motor loads
AS/NZS 61000.2.12:2003 Electromagnetic compatibility (EMC) Environment - Compatibility levels for low-frequency conducted disturbances and signalling in public medium-voltage power supply systems (Reconfirmed 2013)

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Hardcopy - English
PDF 1 User - English
PDF 3 Users - English
PDF 5 Users - English
PDF 9 Users - English
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