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eLibrary > PD IEC TR 61000-1-9:2024 Electromagnetic compatibility (EMC) - General. Evaluation of uncertainty for the measurement of harmonic current emissions >

PD IEC TR 61000-1-9:2024 Electromagnetic compatibility (EMC) - General. Evaluation of uncertainty for the measurement of harmonic current emissions, 2024

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CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Uncertainty evaluation for harmonic emissions tests in IEC 61000-3-2 and IEC 61000-3-12 [Go to Page]
4.1 Methodology
4.2 Measurement model
Figure 1 – Measurement circuit for single-phase equipment [Go to Page]
4.3 Uncertainty components for worst-case scenario [Go to Page]
4.3.1 Method
4.3.2 Current measurement equipment
4.3.3 Input impedance of the current measurement equipment
4.3.4 Test voltage RMS value
4.3.5 Harmonic distortion of the test voltage
4.3.6 Loading effect of the voltmeter
4.4 Uncertainty budget for Class A harmonic 5
Tables [Go to Page]
Table 1 – Worst-case uncertainty budget for Class A, Harmonic 5
5 Uncertainty budget for typical measurement data [Go to Page]
5.1 General
5.2 Current measurement equipment
5.3 Input impedance of the measurement equipment
5.4 Test voltage RMS value
5.5 Harmonic distortion of the test voltage
5.6 Loading effect of the voltmeter
6 Measurement uncertainty supporting conformity decisions
Annex A (informative)Worst-case uncertainty budgets for various EUT classesof tests and selected harmonics [Go to Page]
Table A.1 – Worst-case uncertainty budget for Class A, Harmonic 5
Table A.2 – Worst-case uncertainty budget for Class A, Harmonic 6
Table A.3 – Worst-case uncertainty budget for Class A, Harmonic15
Table A.4 – Worst-case uncertainty budget for Class A, Harmonic 40
Table A.5 – Worst-case uncertainty budget for Class C, Harmonic 3
Table A.6 – Worst-case uncertainty budget for Class C, Harmonic 5
Table A.7 – Worst-case uncertainty budget for Class C, Harmonic 11
Table A.8 – Worst-case uncertainty budget for Class D, Harmonic 3
Table A.9 – Worst-case uncertainty budget for Class D, Harmonic 11
Bibliography [Go to Page]

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