IEC 62586-2:2017

IEC 62586-2 ®
Edition 2.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power quality measurement in power supply systems –
Part 2: Functional tests and uncertainty requirements

Mesure de la qualité de l'alimentation dans les réseaux d'alimentation –
Partie 2: Essais fonctionnels et exigences d'incertitude

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IEC 62586-2 ®
Edition 2.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power quality measurement in power supply systems –

Part 2: Functional tests and uncertainty requirements

Mesure de la qualité de l'alimentation dans les réseaux d'alimentation –

Partie 2: Essais fonctionnels et exigences d'incertitude

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-5028-0

– 2 – IEC 62586-2:2017 © IEC 2017
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms, definitions, abbreviated terms, notations and symbols . 13
3.1 General terms and definitions . 13
3.2 Terms and definitions related to uncertainty . 13
3.3 Notations . 14
3.3.1 Functions . 14
3.3.2 Symbols and abbreviated terms . 14
3.3.3 Indices . 14
4 Requirements . 14
4.1 Requirements for products complying with class A . 14
4.2 Requirements for products complying with class S . 15
5 Functional type tests common requirements . 17
5.1 General philosophy for testing . 17
5.1.1 System topology . 17
5.1.2 Stabilization time . 17
5.1.3 Measuring ranges . 17
5.1.4 Single "power-system influence quantities" . 19
5.1.5 "External influence quantities" . 21
5.1.6 Test criteria . 21
5.2 Testing procedure . 22
5.2.1 Device under test. 22
5.2.2 Testing conditions . 22
5.2.3 Testing equipment . 22
6 Functional testing procedure for instruments complying with class A according to
IEC 61000-4-30 . 22
6.1 Power frequency . 22
6.1.1 General . 22
6.1.2 Measurement method . 23
6.1.3 Measurement uncertainty and measuring range . 23
6.1.4 Measurement evaluation . 24
6.1.5 Measurement aggregation . 24
6.2 Magnitude of supply voltage. 24
6.2.1 Measurement method . 24
6.2.2 Measurement uncertainty and measuring range . 24
6.2.3 Measurement evaluation . 25
6.2.4 Measurement aggregation . 25
6.3 Flicker . 27
6.4 Supply voltage interruptions, dips and swells . 27
6.4.1 General . 27
6.4.2 Check dips / interruptions in polyphase system . 35
6.4.3 Check swells in polyphase system . 37
6.5 Supply voltage unbalance . 38
6.5.1 General . 38

6.5.2 Measurement method, measurement uncertainty and measuring range . 39
6.5.3 Aggregation . 39
6.6 Voltage harmonics . 39
6.6.1 Measurement method . 39
6.6.2 Measurement uncertainty and measuring range . 40
6.6.3 Measurement evaluation . 41
6.6.4 Measurement aggregation . 41
6.7 Voltage interharmonics . 43
6.7.1 Measurement method . 43
6.7.2 Measurement uncertainty and measuring range . 44
6.7.3 Measurement evaluation . 45
6.7.4 Measurement aggregation . 45
6.8 Mains signalling voltages on the supply voltage . 47
6.8.1 Measurement method . 47
6.8.2 Measurement uncertainty and measuring range . 49
6.8.3 Aggregation . 50
6.9 Measurement of underdeviation and overdeviation parameters . 50
6.9.1 Measurement method . 50
6.9.2 Measurement uncertainty and measuring range . 52
6.9.3 Measurement evaluation . 53
6.9.4 Measurement aggregation . 53
6.10 Flagging . 56
6.11 Clock uncertainty testing . 58
6.12 Variations due to external influence quantities . 58
6.12.1 General . 58
6.12.2 Influence of temperature . 59
6.12.3 Influence of power supply voltage . 61
6.13 Rapid voltage changes (RVC) . 62
6.13.1 RVC parameters and evaluation . 62
6.13.2 General . 62
6.13.3 "No RVC" tests . 64
6.13.4 "RVC threshold and setup" test . 68
6.13.5 "RVC parameters" test . 70
6.13.6 "RVC polyphase" tests . 72
6.13.7 "Voltage is in steady-state condition" tests. 74
6.14 Magnitude of current . 77
6.15 Harmonic current . 77
6.16 Interharmonic currents . 77
6.17 Current unbalance . 77
6.17.1 General . 77
6.17.2 Measurement method, measurement uncertainty and measuring range . 78
7 Functional testing procedure for instruments complying with class S according to
IEC 61000-4-30 . 78
7.1 Power frequency . 78
7.1.1 General . 78
7.1.2 Measurement method . 79
7.1.3 Measurement uncertainty and measuring range . 79
7.1.4 Measurement evaluation . 80
7.1.5 Measurement aggregation . 80

– 4 – IEC 62586-2:2017 © IEC 2017
7.2 Magnitude of the supply voltage . 80
7.2.1 Measurement method . 80
7.2.2 Measurement uncertainty and measuring range . 80
7.2.3 Measurement evaluation . 81
7.2.4 Measurement aggregation . 81
7.3 Flicker . 83
7.4 Supply voltage interruptions, dips and swells . 83
7.4.1 General requirements . 83
7.4.2 Check dips / interruptions in polyphase system . 89
7.4.3 Check swells in polyphase system . 91
7.5 Supply voltage unbalance . 92
7.5.1 General . 92
7.5.2 Measurement method, measurement uncertainty and measuring range . 93
7.5.3 Aggregation . 93
7.6 Voltage harmonics . 93
7.6.1 General . 93
7.6.2 Measurement method . 94
7.6.3 Measurement method, measurement uncertainty and measuring range . 95
7.6.4 Measurement evaluation . 96
7.6.5 Measurement aggregation . 96
7.7 Voltage interharmonics . 98
7.8 Mains signalling voltages on the supply voltage . 98
7.8.1 General . 98
7.8.2 Measurement method . 99
7.8.3 Measurement uncertainty and measuring range . 99
7.8.4 Aggregation . 99
7.9 Measurement of underdeviation and overdeviation parameters . 99
7.10 Flagging . 99
7.11 Clock uncertainty testing . 101
7.12 Variations due to external influence quantities . 102
7.12.1 General . 102
7.12.2 Influence of temperature . 103
7.12.3 Influence of power supply voltage . 105
7.13 Rapid voltage changes . 106
7.14 Magnitude of current . 106
7.15 Harmonic current . 106
7.16 Interharmonic currents . 106
7.17 Current unbalance . 106
7.17.1 General . 106
7.17.2 Measurement method, measurement uncertainty and measuring range . 107
8 Calculation of measurement uncertainty and operating uncertainty . 108
Annex A (normative) Intrinsic uncertainty and operating uncertainty, . 110
A.1 General . 110
A.2 Measurement uncertainty . 110
A.3 Operating uncertainty . 111
Annex B (informative) Overall system uncertainty . 112
Annex C (normative) Calculation of measurement and operating uncertainty for
voltage magnitude and power frequency . 113

C.1 Selection of test points to verify operating uncertainty and uncertainty under
reference conditions . 113
C.2 Class A calculation examples . 113
C.2.1 General . 113
C.2.2 Parameter: magnitude of supply voltage, U = 230 V, 50/60Hz, rated
din
range of temperature −25 °C to +55 °C . 113
C.2.3 Parameter: power frequency 50/60 Hz, rated range of temperature
−25 °C to +55 °C . 114
Annex D (informative) Further test on dips (amplitude and phase angles changes) . 116
D.1 Phase-to-phase or phase-to-neutral testing . 116
D.2 Test method . 116
Annex E (informative) Further tests on dips (polyphase): test procedure . 118
E.1 General . 118
E.2 Phase voltage dips and interruptions . 119
E.3 Phase swells . 119
Annex F (normative) Gapless measurements of voltage amplitude and harmonics test . 121
F.1 Purpose of the test . 121
F.2 Test set up . 121
F.3 Voltage amplitude . 121
F.3.1 Test signal . 121
F.3.2 Result evaluation . 121
F.4 Harmonics . 122
F.4.1 Test signal . 122
F.4.2 Result evaluation . 122
F.5 Inter-harmonics . 123
F.5.1 Test signal . 123
F.5.2 Result evaluation . 123
Annex G (informative) Gapless measurements of voltage amplitude and harmonics. 124
Annex H (informative) Testing equipment recommendations . 133
H.1 Testing range . 133
H.2 Uncertainty and stability of source and reference meter . 133
H.2.1 Uncertainty of source and reference meter . 133
H.2.2 Stability of the source . 134
H.3 Time synchronisation . 134
H.4 Power quality functions of source and reference meter . 134
H.5 Traceability . 135
Annex I (informative) Recommendations related to a declaration of conformity (DoC)
and a test report . 136
I.1 Definitions. 136
I.2 Recommendations . 136
I.3 Example of IEC 62586-1 declaration of conformity . 136
I.4 Example of IEC 62586-2 declaration . 138
I.4.1 General . 138
I.4.2 Recommendation for IEC 62586-2 test report . 139
I.4.3 Recommendation for IEC 62586-2 test summary . 140
I.4.4 Recommendation for IEC 62586-2 test equipment information . 140
I.4.5 Recommendation for IEC 62586-2 tested functions . 140
Bibliography . 141

– 6 – IEC 62586-2:2017 © IEC 2017
Figure 1 – Overview of test for dips according to test A4.1.1 . 30
Figure 2 – Detail 1 of waveform for test of dips according to test A4.1.1 . 31
Figure 3 – Detail 2 of waveform for tests of dips according to A4.1.1 . 31
Figure 4 – Detail 3 of waveform for tests of dips according to test A4.1.1 . 32
Figure 5 – Detail 1 of waveform for test of dips according to test A4.1.2 . 32
Figure 6 – Detail 2 of waveform for tests of dips according to test A4.1.2 . 33
Figure 7 – Detail 1 of waveform for test of swells according to test A4.1.2 . 33
Figure 8 – Detail 2 of waveform for tests of swells according to test A4.1.2 . 34
Figure 9 – Sliding reference voltage test . 34
Figure 10 – Sliding reference start up condition . 35
Figure 11 – Detail 1 of waveform for test of polyphase dips/interruptions . 36
Figure 12 – Detail 2 of waveform for test of polyphase dips/interruptions . 36
Figure 13 – Detail 3 of waveform for test of polyphase dips/interruptions . 37
Figure 14 – Detail 1 of waveform for test of polyphase swells . 38
Figure 15 – Detail 2 of waveform for test of polyphase swells . 38
Figure 16 – Flagging test for class A . 57
Figure 17 – Clock uncertainty testing . 58
Figure 18 – Example of RVC event . 62
Figure 19 – A13.1.1 waveform . 65
Figure 20 – A13.1.1 waveform with RVC limits and arithmetic mean . 65
Figure 21 – A13.1.2 waveform . 66
Figure 22 – A13.1.2 waveform with RVC limits and arithmetic means . 67
Figure 23 – A13.1.3 waveform . 68
Figure 24 – A13.1.3 waveform with RVC limits and arithmetic mean . 68
Figure 25 – A13.2.1 waveform . 69
Figure 26 – A13.2.1 waveform with RVC limits and arithmetic mean . 70
Figure 27 – A13.3.1 waveform . 71
Figure 28 – A13.3.1 waveform with RVC limits and arithmetic mean . 72
Figure 29 – A13.4.1 waveform . 73
Figure 30 – A13.5.1 waveform . 75
Figure 31 –A13.5.1 waveform with RVC limits and arithmetic mean . 75
Figure 32 – A13.5.2 waveform . 76
Figure 33 – A13.5.2 waveform with RVC limits and arithmetic mean . 77
Figure 34 – Detail 1 of waveform for test of dips according to test S4.1.2 . 86
Figure 35 – Detail 2 of waveform for tests of dips according to test S4.1.2 . 86
Figure 36 – Detail 1 of waveform for test of swells according to test S4.1.2 . 87
Figure 37 – Detail 2 of waveform for tests of swells according to test S4.1.2 . 87
Figure 38 – Sliding reference voltage test . 88
Figure 39 – Sliding reference start-up condition . 88
Figure 40 – Detail 1 of waveform for test of polyphase dips/interruptions . 90
Figure 41 – Detail 2 of waveform for test of polyphase dips/interruptions . 90
Figure 42 – Detail 3 of waveform for test of polyphase dips/interruptions . 91
Figure 43 – Detail 1 of waveform for test of polyphase swells . 92

Figure 44 – Detail 2 of waveform for test of polyphase swells . 92
Figure 45 – Flagging test for class S . 101
Figure 46 – Clock uncertainty testing . 102
Figure A.1 – Different kinds of uncertainties . 110
Figure D.1 – Phase-to-neutral testing on three-phase systems . 116
Figure D.2 – Phase-to-phase testing on three-phase systems . 116
Figure E.1 – Example for one phase of a typical N cycle injection . 118
Figure E.2 – Dip/interruption accuracy (amplitude and timing) test . 119
Figure E.3 – Swell accuracy (amplitude and timing) test . 120
Figure G.1 – Simulated signal under noisy conditions . 124
Figure G.2 – Waveform for checking gapless RMS voltage measurement . 125
Figure G.3 – 2,3 Hz frequency fluctuation . 125
Figure G.4 – Spectral leakage effects for a missing sample . 126
Figure G.5 – Illustration of Q for missing samples . 127
RMS
Figure G.6 – Detection of a single missing sample . 127
−6
Figure G.7 – Q for an ideal signal, sampling error = −300 × 10 . 128
RMS
−6
Figure G.8 – Q for an ideal signal, sampling error = 400 × 10 . 128
RMS
−6
Figure G.9 – Q for an ideal signal, sampling error = 200 × 10 . 129
RMS
Figure G.10 – Q (5) with ideal test signal and perfect sampling frequency
H
synchronization . 130
−6 −6
Figure G.11 – Q (5) with 300 × 10 sampling frequency error and 100 × 10
H
modulation frequency error . 130
Figure G.12 – Q with a 20/24-cycle sliding window with an output every 10/12
RMS
cycles . 131
Figure G.13 – Amplitude test for fluctuating component . 131

Table 1 – Summary of type tests for class A . 15
Table 2 – Summary of type tests for class S . 16
Table 3 – Testing points for each measured parameter . 18
Table 4 – List of single "power-system influence quantities" . 20
Table 5 – Influence of temperature . 21
Table 6 – Influence of auxiliary power supply voltage . 21
Table 7 – List of generic test criteria . 22
Table 8 – Specification of test A13.1.1 . 64
Table 9 – Specification of test A13.1.2 . 66
Table 10 – Specification of test A13.1.3 . 67
Table 11 – Specification of test A13.2.1 . 69
Table 12 – Specification of test A13.3.1 . 71
Table 13 – Specification of test A13.4.1 . 73
Table 14 – Specification of test A13.5.1 . 74
Table 15 – Specification of test A13.5.2 . 76
Table 16 – Uncertainty requirements . 109
Table D.1 – Tests pattern . 117
Table H.1 – Testing range . 133

– 8 – IEC 62586-2:2017 © IEC 2017
Table H.2 – Uncertainty of source and reference meter. 134
Table H.3 – Stability of source . 134
Table I.1 – Example of a DoC related to compliance with IEC 62586-1 . 137
Table I.2 – Example of DoC related to compliance with IEC 62586-2 . 139

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER QUALITY MEASUREMENT IN POWER SUPPLY SYSTEMS –

Part 2: Functional tests and uncertainty requirements

FOREWORD
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International Standard IEC 62586-2 has been prepared by IEC technical committee 85:
Measuring equipment for electrical and electromagnetic quantities.
This second edition cancels and replaces the first edition published in 2013. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) test procedures for RVC and current have been added;
b) mistakes have been fixed.
This bilingual version (2017-11) corresponds to the monolingual English version, published in
2017-03.
– 10 – IEC 62586-2:2017 © IEC 2017
The text of this standard is based on the following documents:
CDV Report on voting
85/525/CDV 85/571/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62586 series, published under the general title Power quality
measurement in power supply systems, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the corrigendum of June 2018 have been included in this copy.

IMPORTANT – The 'colour inside' logo on the cover page of this publicati
...

IEC 62586-2 ®
Edition 2.1 2021-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power quality measurement in power supply systems –
Part 2: Functional tests and uncertainty requirements

Mesure de la qualité de l'alimentation dans les réseaux d'alimentation –
Partie 2: Essais fonctionnels et exigences d'incertitude

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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IEC 62586-2 ®
Edition 2.1 2021-09
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power quality measurement in power supply systems –
Part 2: Functional tests and uncertainty requirements
Mesure de la qualité de l'alimentation dans les réseaux d'alimentation –
Partie 2: Essais fonctionnels et exigences d'incertitude
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-5343-4

IEC 62586-2 ®
Edition 2.1 2021-09
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Power quality measurement in power supply systems –
Part 2: Functional tests and uncertainty requirements

Mesure de la qualité de l'alimentation dans les réseaux d'alimentation –
Partie 2: Essais fonctionnels et exigences d'incertitude

– 2 – IEC 62586-2:2017+AMD1:2021 CSV
© IEC 2021
CONTENTS
FOREWORD . 9
INTRODUCTION . 11
1 Scope . 12
2 Normative references. 12
3 Terms, definitions, abbreviated terms, notations and symbols . 13
3.1 General terms and definitions . 13
3.2 Terms and definitions related to uncertainty . 13
3.3 Notations . 14
3.3.1 Functions . 14
3.3.2 Symbols and abbreviated terms . 14
3.3.3 Indices . 14
4 Requirements . 14
4.1 Requirements for products complying with class A . 14
4.2 Requirements for products complying with class S . 15
5 Functional type tests common requirements . 17
5.1 General philosophy for testing . 17
5.1.1 System topology . 17
5.1.2 Stabilization time . 17
5.1.3 Measuring ranges . 17
5.1.4 Single "power-system influence quantities" . 19
5.1.5 "External influence quantities" . 21
5.1.6 Test criteria . 21
5.2 Testing procedure . 22
5.2.1 Device under test . 22
5.2.2 Testing conditions . 22
5.2.3 Testing equipment . 22
6 Functional testing procedure for instruments complying with class A according to
IEC 61000-4-30 . 22
6.1 Power frequency . 22
6.1.1 General . 22
6.1.2 Measurement method . 23
6.1.3 Measurement uncertainty and measuring range . 23
6.1.4 Measurement evaluation . 24
6.1.5 Measurement aggregation . 24
6.2 Magnitude of supply voltage . 24
6.2.1 Measurement method . 24
6.2.2 Measurement uncertainty and measuring range . 24
6.2.3 Measurement evaluation . 25
6.2.4 Measurement aggregation . 25
6.3 Flicker . 27
6.4 Supply voltage interruptions, dips and swells . 27
6.4.1 General . 27
6.4.2 Check dips / interruptions in polyphase system . 39
6.4.3 Check swells in polyphase system . 41
6.5 Supply voltage unbalance . 42
6.5.1 General . 42

© IEC 2021
6.5.2 Measurement method, measurement uncertainty and measuring range . 43
6.5.3 Aggregation . 43
6.6 Voltage harmonics . 43
6.6.1 Measurement method . 43
6.6.2 Measurement uncertainty and measuring range . 44
6.6.3 Measurement evaluation . 45
6.6.4 Measurement aggregation . 45
6.7 Voltage interharmonics . 47
6.7.1 Measurement method . 47
6.7.2 Measurement uncertainty and measuring range . 48
6.7.3 Measurement evaluation . 49
6.7.4 Measurement aggregation . 49
6.8 Mains signalling voltages on the supply voltage . 51
6.8.1 Measurement method . 51
6.8.2 Measurement uncertainty and measuring range . 53
6.8.3 Aggregation . 54
6.9 Measurement of underdeviation and overdeviation parameters . 54
6.9.1 Measurement method . 54
6.9.2 Measurement uncertainty and measuring range . 56
6.9.3 Measurement evaluation . 57
6.9.4 Measurement aggregation . 57
6.10 Flagging . 60
6.11 Clock uncertainty testing . 62
6.12 Variations due to external influence quantities . 62
6.12.1 General . 62
6.12.2 Influence of temperature . 63
6.12.3 Influence of power supply voltage . 65
6.13 Rapid voltage changes (RVC) . 66
6.13.1 RVC parameters and evaluation . 66
6.13.2 General . 67
6.13.3 "No RVC" tests . 69
6.13.4 "RVC threshold and setup" test . 78
6.13.5 "RVC parameters" test . 81
6.13.6 "RVC polyphase" tests . 84
6.13.7 "Voltage is in steady-state condition" tests . 87
6.14 Magnitude of current . 92
6.15 Harmonic current . 93
6.16 Interharmonic currents . 93
6.17 Current unbalance . 93
6.17.1 General . 93
6.17.2 Measurement method, measurement uncertainty and measuring range . 94
7 Functional testing procedure for instruments complying with class S according to
IEC 61000-4-30 . 94
7.1 Power frequency . 94
7.1.1 General . 94
7.1.2 Measurement method . 95
7.1.3 Measurement uncertainty and measuring range . 95
7.1.4 Measurement evaluation . 96
7.1.5 Measurement aggregation . 96

– 4 – IEC 62586-2:2017+AMD1:2021 CSV
© IEC 2021
7.2 Magnitude of the supply voltage . 96
7.2.1 Measurement method . 96
7.2.2 Measurement uncertainty and measuring range . 96
7.2.3 Measurement evaluation . 97
7.2.4 Measurement aggregation . 97
7.3 Flicker . 99
7.4 Supply voltage interruptions, dips and swells . 99
7.4.1 General requirements . 99
7.4.2 Check dips / interruptions in polyphase system . 105
7.4.3 Check swells in polyphase system . 107
7.5 Supply voltage unbalance . 108
7.5.1 General . 108
7.5.2 Measurement method, measurement uncertainty and measuring range . 109
7.5.3 Aggregation . 109
7.6 Voltage harmonics . 109
7.6.1 General . 109
7.6.2 Measurement method . 110
7.6.3 Measurement method, measurement uncertainty and measuring range . 111
7.6.4 Measurement evaluation . 112
7.6.5 Measurement aggregation . 112
7.7 Voltage interharmonics . 114
7.8 Mains signalling voltages on the supply voltage . 114
7.8.1 General . 114
7.8.2 Measurement method . 115
7.8.3 Measurement uncertainty and measuring range . 115
7.8.4 Aggregation . 115
7.9 Measurement of underdeviation and overdeviation parameters . 115
7.10 Flagging . 115
7.11 Clock uncertainty testing . 117
7.12 Variations due to external influence quantities . 118
7.12.1 General . 118
7.12.2 Influence of temperature . 119
7.12.3 Influence of power supply voltage . 121
7.13 Rapid voltage changes . 122
7.14 Magnitude of current . 122
7.15 Harmonic current . 122
7.16 Interharmonic currents . 122
7.17 Current unbalance . 122
7.17.1 General . 122
7.17.2 Measurement method, measurement uncertainty and measuring range . 123
8 Calculation of measurement uncertainty and operating uncertainty . 124
Annex A (normative) Intrinsic uncertainty and operating uncertainty, . 126
A.1 General . 126
A.2 Measurement uncertainty . 126
A.3 Operating uncertainty . 127
Annex B (informative) Overall system uncertainty . 128
Annex C (normative) Calculation of measurement and operating uncertainty for
voltage magnitude and power frequency . 129

© IEC 2021
C.1 Selection of test points to verify operating uncertainty and uncertainty under
reference conditions . 129
C.2 Class A calculation examples . 129
C.2.1 General . 129
C.2.2 Parameter: magnitude of supply voltage, U = 230 V, 50/60Hz, rated
din
range of temperature −25 °C to +55 °C . 129
C.2.3 Parameter: power frequency 50/60 Hz, rated range of temperature
−25 °C to +55 °C . 130
Annex D (informative) Further test on dips (amplitude and phase angles changes) . 132
D.1 Phase-to-phase or phase-to-neutral testing . 132
D.2 Test method . 132
Annex E (informative) Further tests on dips (polyphase): test procedure . 134
E.1 General . 134
E.2 Phase voltage dips and interruptions . 135
E.3 Phase swells . 135
Annex F (normative) Gapless measurements of voltage amplitude and harmonics test . 137
F.1 Purpose of the test . 137
F.2 Test set up . 137
F.3 Voltage amplitude . 137
F.3.1 Test signal . 137
F.3.2 Result evaluation . 137
F.4 Harmonics . 138
F.4.1 Test signal . 138
F.4.2 Result evaluation . 138
F.5 Inter-harmonics . 139
F.5.1 Test signal . 139
F.5.2 Result evaluation . 139
Annex G (informative) Gapless measurements of voltage amplitude and harmonics . 140
Annex H (informative) Testing equipment recommendations . 149
H.1 Testing range . 149
H.2 Uncertainty and stability of source and reference meter . 149
H.2.1 Uncertainty of source and reference meter . 149
H.2.2 Stability of the source . 150
H.3 Time synchronisation . 150
H.4 Power quality functions of source and reference meter . 150
H.5 Traceability . 151
Annex I (informative) Recommendations related to a declaration of conformity (DoC)
and a test report . 152
I.1 Definitions . 152
I.2 Recommendations. 152
I.3 Example of IEC 62586-1 declaration of conformity . 152
I.4 Example of IEC 62586-2 declaration . 154
I.4.1 General . 154
I.4.2 Recommendation for IEC 62586-2 test report . 155
I.4.3 Recommendation for IEC 62586-2 test summary . 156
I.4.4 Recommendation for IEC 62586-2 test equipment information . 156
I.4.5 Recommendation for IEC 62586-2 tested functions . 156
Bibliography . 157

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© IEC 2021
Figure 1 – Overview of test for dips according to test A4.1.1 . 31
Figure 2 – Detail 1 of waveform for test of dips according to test A4.1.1 . 32
Figure 3 – Detail 2 of waveform for tests of dips according to A4.1.1 . 33
Figure 4 – Detail 3 of waveform for tests of dips according to test A4.1.1 . 33
Figure 5 – Detail 1 of waveform for test of dips according to test A4.1.2 . 34
Figure 6 – Detail 2 of waveform for tests of dips according to test A4.1.2 . 35
Figure 7 – Detail 1 of waveform for test of swells according to test A4.1.2 . 36
Figure 8 – Detail 2 of waveform for tests of swells according to test A4.1.2 . 37
Figure 9 – Sliding reference voltage test . 38
Figure 10 – Sliding reference start up condition . 38
Figure 11 – Detail 1 of waveform for test of polyphase dips/interruptions . 40
Figure 12 – Detail 2 of waveform for test of polyphase dips/interruptions . 40
Figure 13 – Detail 3 of waveform for test of polyphase dips/interruptions . 41
Figure 14 – Detail 1 of waveform for test of polyphase swells . 42
Figure 15 – Detail 2 of waveform for test of polyphase swells . 42
Figure 16 – Flagging test for class A . 61
Figure 17 – Clock uncertainty testing . 62
Figure 18 – Example of RVC event . 67
Figure 19 – Test A13.1.1 waveform . 70
Figure 20 – Test A13.1.1 waveform with RVC limits and arithmetic mean at 50 Hz . 71
Figure 21 – Test A13.1.2 waveform . 73
Figure 22 – Test A13.1.2 waveform with RVC limits and arithmetic means at 50 Hz . 74
Figure 23 – Test A13.1.3 waveform . 76
Figure 24 – Test A13.1.3 waveform with RVC limits and arithmetic mean at 50 Hz . 77
Figure 25 – Test A13.2.1 waveform . 79
Figure 26 – Test A13.2.1 waveform with RVC limits and arithmetic mean at 50 Hz . 80
Figure 27 – Test A13.3.1 waveform . 82
Figure 28 – Test A13.3.1 waveform with RVC limits and arithmetic mean at 50 Hz . 83
Figure 29 – Test A13.4.1 waveform at 50 Hz . 85
Figure 47 – Test A13.4.1 waveform with RVC limits and VSS at 50 Hz . 86
Figure 30 – Test A13.5.1 waveform . 88
Figure 31 – Test A13.5.1 waveform with RVC limits and arithmetic mean at 50 Hz . 89
Figure 32 – Test A13.5.2 waveform . 91
Figure 33 – Test A13.5.2 waveform with RVC limits and arithmetic mean at 50 Hz . 92
Figure 34 – Detail 1 of waveform for test of dips according to test S4.1.2 . 102
Figure 35 – Detail 2 of waveform for tests of dips according to test S4.1.2 . 102
Figure 36 – Detail 1 of waveform for test of swells according to test S4.1.2 . 103
Figure 37 – Detail 2 of waveform for tests of swells according to test S4.1.2 . 103
Figure 38 – Sliding reference voltage test . 104
Figure 39 – Sliding reference start-up condition . 104
Figure 40 – Detail 1 of waveform for test of polyphase dips/interruptions . 106
Figure 41 – Detail 2 of waveform for test of polyphase dips/interruptions . 106
Figure 42 – Detail 3 of waveform for test of polyphase dips/interruptions . 107

© IEC 2021
Figure 43 – Detail 1 of waveform for test of polyphase swells . 108
Figure 44 – Detail 2 of waveform for test of polyphase swells . 108
Figure 45 – Flagging test for class S . 117
Figure 46 – Clock uncertainty testing . 118
Figure A.1 – Different kinds of uncertainties . 126
Figure D.1 – Phase-to-neutral testing on three-phase systems . 132
Figure D.2 – Phase-to-phase testing on three-phase systems . 132
Figure E.1 – Example for one phase of a typical N cycle injection . 134
Figure E.2 – Dip/interruption accuracy (amplitude and timing) test . 135
Figure E.3 – Swell accuracy (amplitude and timing) test . 136
Figure G.1 – Simulated signal under noisy conditions . 140
Figure G.2 – Waveform for checking gapless RMS voltage measurement . 141
Figure G.3 – 2,3 Hz frequency fluctuation . 141
Figure G.4 – Spectral leakage effects for a missing sample . 142
Figure G.5 – Illustration of Q for missing samples . 143
RMS
Figure G.6 – Detection of a single missing sample . 143
−6
Figure G.7 – Q for an ideal signal, sampling error = −300 × 10 . 144
RMS
−6
Figure G.8 – Q for an ideal signal, sampling error = 400 × 10 . 144
RMS
−6
Figure G.9 – Q for an ideal signal, sampling error = 200 × 10 . 145
RMS
Figure G.10 – Q (5) with ideal test signal and perfect sampling frequency
H
synchronization . 146
−6 −6
Figure G.11 – Q (5) with 300 × 10 sampling frequency error and 100 × 10
H
modulation frequency error . 146
Figure G.12 – Q with a 20/24-cycle sliding window with an output every 10/12
RMS
cycles . 147
Figure G.13 – Amplitude test for fluctuating component . 147

Table 1 – Summary of type tests for class A . 15
Table 2 – Summary of type tests for class S . 16
Table 3 – Testing points for each measured parameter . 18
Table 4 – List of single "power-system influence quantities" . 20
Table 5 – Influence of temperature . 21
Table 6 – Influence of auxiliary power supply voltage . 21
Table 7 – List of generic test criteria. 22
Table 8 – Specification of test A13.1.1 . 69
Table 9 – Specification of test A13.1.2 . 72
Table 10 – Specification of test A13.1.3 . 75
Table 11 – Specification of test A13.2.1 . 78
Table 12 – Specification of test A13.3.1 . 81
Table 13 – Specification of test A13.4.1 . 84
Table 14 – Specification of test A13.5.1 . 87
Table 15 – Specification of test A13.5.2 . 90
Table 16 – Uncertainty requirements . 125
Table D.1 – Tests pattern . 133

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© IEC 2021
Table H.1 – Testing range . 149
Table H.2 – Uncertainty of source and reference meter . 150
Table H.3 – Stability of source . 150
Table I.1 – Example of a DoC related to compliance with IEC 62586-1 . 153
Table I.2 – Example of DoC related to compliance with IEC 62586-2 . 155

© IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER QUALITY MEASUREMENT IN POWER SUPPLY SYSTEMS –

Part 2: Functional tests and uncertainty requirements

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 62586-2 edition 2.1 contains the second edition (2017-03) [documents 85/525/CDV
and 85/571/RVC], its corrigendum 1 (2018-06) and its amendment 1 (2021-09)
[documents 85/770/FDIS and 85/795/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
– 10 – IEC 62586-2:2017+AMD1:2021 CSV
© IEC 2021
International Standard IEC 62586-2 has been prepared by IEC technical committee 85:
Measuring equipment for electrical and electromagnetic quantities.
This second edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) test procedures for RVC and current have been added;
b) mistakes have been fixed.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 62586 series, published under the general title Power quality
measurement in power supply systems, can be found on the IEC website.
The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under webstore.iec.ch
in the data related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
© IEC 2021
INTRODUCTION
Power quality is more and more important worldwide in power supply systems and is generally
assessed by power quality instruments.
This part of IEC 62586 spe
...