IEC TR 61000-1-4 : 1.0

ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 1-4: GENERAL - HISTORICAL RATIONALE FOR THE LIMITATION OF POWER-FREQUENCY CONDUCTED HARMONIC CURRENT EMISSIONS FROM EQUIPMENT, IN THE FREQUENCY RANGE UP TO 2 KHZ

International Electrotechnical Committee

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FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General appraisal
5 Acceptable provisions in standards related to regulatory
  legislation
6 History of IEC 61000-3-2 and its predecessors
  6.1 Before 1960
  6.2 1960 to 1975
  6.3 1975 to 1982
  6.4 1982 to 1995
  6.5 1995 to 2000
  6.6 The 'Millennium Amendment'
  6.7 Future development of IEC 61000-3-2
7 History of IEC 61000-3-12 and its predecessor
  7.1 1989 to 1998
  7.2 After 1998
8 Economic considerations taken into account in setting
  limits in IEC 61000-3-2 before publication in 1995, and
  before the finalization of the text of the Millennium
  Amendment
Annex A (informative) Compatibility level and compensation
                      factor
Annex B (informative) Comparison of Class A limits and the
                      harmonic spectra of phase-controlled
                      dimmers of incandescent lamps at
                      90 degree firing angle
Annex C (informative) Comparison of Class C (Table 2 of
                      IEC 61000-3-2) limits and the harmonic
                      spectrum of a discharge lamp with
                      inductive ballast
Annex D (informative) Comparison of Class D limits and the
                      harmonic spectra of capacitor-filtered
                      single-phase rectifiers with 35 degree
                      and 65 degree conduction angles
Annex E (informative) Economic considerations taken into
                      account in setting limits, before
                      finalization of the text of the
                      Millennium Amendment to IEC 61000-3-2
Annex F (Informative) Concept plan for the full revision of
                      IEC 61000-3-2
Annex G (informative) Derivation of the limits in IEC 61000-3-12
Annex H (informative) Explanation of the reasons for using the
                      concepts of total harmonic distortion
                      (THD) and partial weighted harmonic
                      distortion (PWHD)
Bibliography

Abstract

Provides the sources and effects of power frequency conducted harmonic current emissions in the frequency range up to 2 kHz on the public electricity supply, and gives an account of the reasoning and calculations leading to the existing emission limits for equipment in the editions of IEC 61000-3-2, up to and including the second edition (2000) and its first amendment (2001), and in the first edition of IEC 61000-3-12 (2004).