SN EN 61000-4-7 : 2002
Current
The latest, up-to-date edition.
ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4: TESTING AND MEASUREMENT TECHNIQUES; SECTION 7: GENERAL GUIDE ON HARMONICS AND INTERHARMONICS MEASUREMENTS AND INSTRUMENTATION, FOR POWER SUPPLY SYSTEMS AND EQUIPMENT CONNECTED THERETO
01-12-2013
INTRODUCTION
1 Scope
2 Normative references
3 Definitions, symbols and indices
3.1 Definitions related to frequency analysis
3.2 Definitions related to harmonics
3.3 Definitions related to distortion factors
3.4 Definitions related to interharmonics
3.5 Notations
3.5.1 Symbols and abbreviations
3.5.2 Indices
4 General concepts and common requirements for all types of
instrumentation
4.1 Characteristics of the signal to be measured
4.2 Accuracy classes of instrumentation
4.3 Types of measurement
4.4 General structure of the instrument
4.4.1 Main instrument
4.4.2 Post-processing parts
5 Harmonic measurements
5.1 Current input circuit
5.2 Voltage input circuit
5.3 Accuracy requirements
5.4 Measurement set-up for emission assessment
5.5 Assessment of harmonic emissions
5.5.1 Grouping and smoothing
5.5.2 Compliance with emission limits
5.6 Assessment of voltage harmonic subgroups
current-transformers
6 Other analysis principles
7 Transitional period
8 General
Annex A (informative) Measurement of interharmonics
Annex B (informative) Measurements above the harmonic frequency
range up to 9 kHz
Annex C (informative) Technical considerations for grouping method
Annex ZA (normative) Normative references to international
publications with their corresponding European publications
Bibliography
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