oSIST prEN IEC 61869-1:2022

Instrument transformers - Part 1: General requirements

IEC 61869-1:2023 is applicable to newly manufactured instrument transformers intended for applications where the nominal voltage is higher than 1 kV AC or 1,5 kV DC, with an analogue or a digital secondary signal for measuring, protection and control purposes, with rated frequencies from 15 Hz to 400 Hz, or for DC applications.
The general requirements for instrument transformers for applications in LV systems (nominal voltage ≤ 1 kV AC or ≤ 1,5 kV DC) are covered by IEC 61869-201.
This part of IEC 61869 is a product family standard and covers general requirements only. For each type of instrument transformer, the product standard is composed of this document and the relevant specific product standard.
This part of IEC 61869 contains the requirements for the limits of the errors both for analogue and digital secondary signal. The other characteristics of a digital interface for instrument transformer are standardised in IEC 61869-9 as an application of the IEC 61850 horizontal standard series, covering communication networks and systems for power utility automation.
This part of IEC 61869 considers bandwidth requirements. The accuracy requirements on harmonics and requirements for the anti-aliasing filter are specified in 5.7.
IEC 61869-1:2023 cancels and replaces the first edition published in 2007 and IEC 61869 6:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) merger with IEC 61869-6:2016;
b) new scope: equipment for HV applications with a nominal voltage > 1 kV AC or 1,5 kV DC;
c) new classification of some special tests as type tests or routine test;
d) additional type tests, additional special tests and new clause for commissioning tests;
e) new annexes E, F, G and I.

Messwandler - Teil 1: Allgemeine Anforderungen

Transformateurs de mesure - Partie 1: Exigences générales

L'IEC 61869-1:2023 s’applique aux transformateurs de mesure récemment fabriqués destinés à des applications dont la tension nominale est supérieure à 1 kV en courant alternatif ou à 1,5 kV en courant continu, qui utilisent un signal secondaire analogique ou numérique à des fins de mesure, de protection et de commande, avec des fréquences assignées comprises entre 15 Hz et 400 Hz, ou à des applications en courant continu.
Les exigences générales concernant les transformateurs de mesure destinés à des applications dans les réseaux BT (tension nominale ≤ 1 kV en courant alternatif ou ≤ 1,5 kV en courant continu) sont couvertes par l’IEC 61869-201.
La présente partie de l’IEC 61869 est une norme de famille de produits et couvre uniquement les exigences générales. Pour chaque type de transformateur de mesure, la norme de produit se compose du présent document et de la norme de produit spécifique appropriée.
La présente partie de l’IEC 61869 contient les exigences relatives aux limites d’erreurs, tant pour le signal secondaire analogique que pour le signal secondaire numérique. Les autres caractéristiques d’une interface numérique d’un transformateur de mesure sont normalisées dans l’IEC 61869-9 en tant qu’application de la série de normes horizontales IEC 61850, couvrant les réseaux et les systèmes de communication pour l’automatisation des systèmes électriques.
La présente partie de l’IEC 61869 traite des exigences relatives à la largeur de bande. Les exigences de précision concernant les harmoniques et les exigences relatives au filtre antirepliement sont spécifiées en 5.7.
L'IEC 61869-1:2023 annule et remplace la première édition publiée en 2007 et l’IEC 61869‑6:2016. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) fusion avec l’IEC 61869-6:2016;
b) nouveau domaine d’application: matériel pour les applications HT avec une tension nominale > 1 kV en courant alternatif ou 1,5 kV en courant continu;
c) nouvelle classification de certains essais spéciaux en essais de type ou en essais individuels de série;
d) essais de type supplémentaires, essais spéciaux supplémentaires et nouvel article pour les essais de mise en service;
e) nouvelles Annexes E, F, G et I.

Instrumentni transformatorji - 1. del: Splošne zahteve

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Jul-2022
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 20-May-2022
• Due Date: 07-Oct-2022
• Completion Date: 25-Nov-2022
• Directive: 2014/30/EU - Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility (recast)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to electromagnetic compatibility
• Ref Project: FprEN IEC 61869-1:2023 - Instrument transformers - Part 1: General requirements

Relations

• Revised: SIST EN 61869-1:2009 - Instrument transformers -- Part 1: General requirements
• Effective Date: 19-Jul-2016

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN IEC 61869-1:2022
01-julij-2022
Instrumentni transformatorji - 1. del: Splošne zahteve
Instrument transformers - Part 1: General requirements
Messwandler - Teil 1: Allgemeine Anforderungen
Transformateurs de mesure - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: prEN IEC 61869-1:2022
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
oSIST prEN IEC 61869-1:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN IEC 61869-1:2022

---------------------- Page: 2 ----------------------
oSIST prEN IEC 61869-1:2022

38/702/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61869-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-05-13 2022-08-05
SUPERSEDES DOCUMENTS:
38/652/CD, 38/664A/CC

IEC TC 38 : INSTRUMENT TRANSFORMERS
SECRETARIAT: SECRETARY:
Italy Mr Filippo Frugoni
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

TC 10,TC 13,SC 17C,TC 33,TC 85,TC 95,TC 115
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.

TITLE:
Instrument transformers - Part 1: General requirements

PROPOSED STABILITY DATE: 2027

NOTE FROM TC/SC OFFICERS:

Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download
this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose
without permission in writing from IEC.

---------------------- Page: 3 ----------------------
oSIST prEN IEC 61869-1:2022
IEC CDV 61869-1 © IEC:2022 – 2 – 38/702/CDV
1 CONTENTS
2
3 FOREWORD . 9
4 INTRODUCTION . 11
5 1 Scope . 13
6 2 Normative references . 13
7 3 Terms and definitions . 17
8 Index of abbreviations . 17
9 4 Normal and special environmental conditions . 18
10 4.1 General . 18
11 4.2 Normal environmental conditions . 18
12 4.2.1 Ambient air temperature . 18
13 4.2.2 Altitude . 19
14 4.2.3 Vibrations or earth tremors . 19
15 4.2.4 Exposure to pollution . 19
16 4.2.5 Other environmental conditions for indoor instrument transformers . 19
17 4.2.6 Other environmental conditions for outdoor instrument transformers . 19
18 4.2.7 IT with outdoor parts . 20
19 4.3 Special environmental conditions . 20
20 4.3.1 General . 20
21 4.3.2 Altitude . 20
22 4.3.3 Ambient temperature . 20
23 4.3.4 Vibrations or earth tremors . 20
24 4.3.5 Earthquakes . 20
25 5 Ratings . 20
26 5.1 General . 20
27 5.2 Voltage ratings . 21
28 5.2.1 Highest voltage for equipment (U ) . 21
m
29 5.2.2 Power system earthing . 22
30 5.2.3 Standard values for rated primary voltage . 23
31 5.2.4 Standard values for rated secondary voltage . 23
32 5.2.5 Rated auxiliary power supply voltage . 23
33 5.3 Current ratings . 24
34 5.3.1 Standard values for rated primary current . 24
35 5.3.2 Standard values for rated secondary current . 24
36 5.3.3 Standard values for rated continuous thermal current . 24
37 5.3.4 Short-time current ratings . 24
38 5.4 Dielectric ratings . 24
39 5.4.1 General . 24
40 5.4.2 Rated primary terminal insulation level . 24
41 5.4.3 Other requirements for primary terminals insulation . 25
42 5.4.4 Between-section insulation requirements . 26
43 5.4.5 Insulation requirements for secondary terminals and low-voltage
44 components . 26
45 5.5 Rated frequency (f ) . 26
r
46 5.6 Output ratings . 27
47 5.6.1 Rated burden (Z ) . 27
br

---------------------- Page: 4 ----------------------
oSIST prEN IEC 61869-1:2022
IEC CDV 61869-1 © IEC:2022 – 3 – 38/702/CDV
48 5.6.2 Standard values for the rated delay time for EIT (t ) . 27
dr
49 5.7 Rated accuracy class . 27
50 5.7.1 General . 27
51 5.7.2 Accuracy class extension for harmonics . 27
52 5.7.3 Accuracy requirements for harmonics . 28
53 5.7.4 Harmonic requirements for LPIT protection accuracy classes . 29
54 5.7.5 Anti-aliasing filter for EIT using digital data processing . 30
55 6 Design and construction . 32
56 6.1 Requirements for liquids used in equipment . 32
57 6.1.1 General . 32
58 6.1.2 Liquid quality . 32
59 6.1.3 Liquid level indicator . 32
60 6.1.4 Liquid tightness . 32
61 6.2 Requirements for gases used in equipment . 33
62 6.2.1 General . 33
63 6.2.2 Gas quality . 33
64 6.2.3 Gas monitoring device . 33
65 6.2.4 Gas tightness . 33
66 6.2.5 Pressure relief device . 34
67 6.3 Requirements for solid materials used in equipment . 34
68 6.4 Requirements for temperature rise of parts and components . 34
69 6.4.1 General . 34
70 6.4.2 Influence of altitude on temperature rise . 36
71 6.5 Requirements for earthing of equipment. 36
72 6.5.1 General . 36
73 6.5.2 Earthing of the enclosure . 36
74 6.5.3 Electrical continuity . 37
75 6.6 Requirements for the external insulation . 37
76 6.6.1 Pollution . 37
77 6.6.2 Altitude . 37
78 6.7 Mechanical requirements . 38
79 6.8 Multiple chopped impulses on primary terminals . 39
80 6.9 Internal arc fault protection requirements . 40
81 6.10 Degrees of protection by enclosures . 40
82 6.10.1 General . 40
83 6.10.2 Protection against access to hazardous parts and protection of the
84 equipment against ingress of solid foreign objects and water . 40
85 6.10.3 Protection of enclosure against mechanical impact under normal
86 operating conditions . 41
87 6.11 Electromagnetic Compatibility (EMC) . 41
88 6.11.1 General . 41
89 6.11.2 Requirements for immunity . 41
90 6.11.3 Requirements for emission . 43
91 6.11.4 Requirements for transmitted overvoltage (TOV) . 43
92 6.11.5 Requirements for Radio Interference Voltage (RIV) . 43
93 6.12 Corrosion . 43
94 6.13 Markings . 44
95 6.13.1 General . 44
96 6.13.2 Terminal markings . 44

---------------------- Page: 5 ----------------------
oSIST prEN IEC 61869-1:2022
IEC CDV 61869-1 © IEC:2022 – 4 – 38/702/CDV
97 6.13.3 Rating plate markings . 44
98 6.14 Requirements for LPIT secondary terminal connection . 45
99 6.14.1 Requirements for optical connection . 45
100 6.14.2 Requirements for electrical wires for LPIT secondary connection . 46
101 6.15 EIT secondary signal noise . 47
102 6.16 Fire hazard . 47
103 6.17 Pressure withstand of gas-filled enclosures . 47
104 6.18 Failure detection of EIT . 47
105 6.19 Operability . 48
106 6.20 Reliability and dependability of EIT . 48
107 6.21 Vibration requirements . 48
108 6.22 Storage climatic conditions withstand capability . 48
109 7 Tests . 49
110 7.1 General . 49
111 7.1.1 Classification of tests . 49
112 7.1.2 List of tests . 49
113 7.1.3 Sequence of tests . 51
114 7.1.4 Testing conditions . 52
115 7.2 Type tests . 53
116 7.2.1 General . 53
117 7.2.2 Temperature rise test . 54
118 7.2.3 Impulse voltage withstand test on primary terminals . 55
119 7.2.4 Wet test for outdoor type transformers . 57
120 7.2.5 Electromagnetic Compatibility (EMC) tests . 58
121 7.2.6 Tests for accuracy . 64
122 7.2.7 Verification of the degree of protection by enclosures . 66
123 7.2.8 Enclosure tightness test at ambient temperature. 67
124 7.2.9 Proof test for the gas-filled enclosure . 67
125 7.2.10 Mechanical tests . 67
126 7.2.11 Voltage withstand test of low-voltage components and secondary
127 terminals . 69
128 7.2.12 Storage climatic environmental tests. 69
129 7.2.13 Vibration test . 71
130 7.2.14 Durability of markings . 71
131 7.2.15 Tests for accuracy for harmonics and low frequencies . 72
132 7.2.16 Test for anti-aliasing . 72
133 7.3 Routine tests . 73
134 7.3.1 Power frequency voltage withstand tests on primary terminals . 73
135 7.3.2 Partial discharge measurement. 73
136 7.3.3 Power frequency voltage withstand tests between sections . 75
137 7.3.4 Power frequency voltage withstand tests on secondary terminals . 75
138 7.3.5 Power frequency voltage withstand test for low-voltage components . 76
139 7.3.6 Test for accuracy . 76
140 7.3.7 Verification of markings . 76
141 7.3.8 Enclosure tightness test at ambient temperature. 76
142 7.3.9 Pressure test for the gas-filled enclosure . 77
143 7.3.10 Measurement of capacitance and dielectric dissipation factor . 77
144 7.4 Special tests . 77
145 7.4.1 Multiple chopped impulse test on primary terminals . 77

---------------------- Page: 6 ----------------------
oSIST prEN IEC 61869-1:2022
IEC CDV 61869-1 © IEC:2022 – 5 – 38/702/CDV
146 7.4.2 Transmitted overvoltage test . 78
147 7.4.3 Internal arc fault test . 82
148 7.4.4 Enclosure tightness test at low and high temperatures . 82
149 7.4.5 Insulation resistance measurement on secondary terminals . 83
150 7.4.6 Corrosion test . 83
151 7.4.7 Fire hazard test . 84
152 7.4.8 Thermo-mechanical endurance test . 84
153 7.4.9 Vibration and shock tests . 85
154 7.4.10 Tests for accuracy versus harmonics and low frequencies . 87
155 7.4.11 Seismic qualification . 87
156 7.5 Commissioning tests . 87
157 7.5.1 General . 87
158 7.5.2 Final installation inspection and tests . 87
159 7.5.3 Gas dew point test . 87
160 7.6 Sample tests . 88
161 8 Rules for transport, storage, erection, operation and maintenance. 88
162 8.1 General . 88
163 8.2 Conditions during transport, storage and installation . 88
164 8.3 Installation . 88
165 8.3.1 General . 88
166 8.3.2 Unpacking and lifting . 88
167 8.3.3 Assembly . 88
168 8.3.4 Mounting . 89
169 8.3.5 Connections . 89
170 8.3.6 Final installation inspection and tests . 89
171 8.4 Operation . 89
172 8.5 Maintenance . 89
173 8.5.1 General . 89
174 8.5.2 Responsibilities for the manufacturer . 90
175 8.5.3 Responsibilities for the user . 90
176 8.6 Failure report . 91
177 9 Safety . 91
178 10 Influence of products on the natural environment . 91
179 Annex A (normative) Identification of test specimen . 92
180 A.1 General . 92
181 A.2 Data . 92
182 A.3 Drawings . 92
183 Annex B (informative) Recommendation for contents of failure reports. 93
184 B.1 General . 93
185 B.2 Content . 93
186 Annex C (informative) Fire hazard . 95
187 C.1 Fire hazard . 95
188 C.2 Fire hazard test . 95
189 Annex D (informative) Sample test . 96
190 D.1 Sample test definition . 96
191 D.2 Sample tests . 96
192 Annex E (informative) Technique used in temperature rise test of transformers to
193 determine the thermal time constant by an experimental estimation . 97

---------------------- Page: 7 ----------------------
oSIST prEN IEC 61869-1:2022
IEC CDV 61869-1 © IEC:2022 – 6 – 38/702/CDV
194 Annex F (informative) Guidance for the extension of validity of type tests or special
195 tests of instrument transformers . 99
196 F.1 General . 99
197 F.2 Information needed for extension of type test validity . 99
198 F.3 Application of extension criteria . 100
199 F.3.1 Dielectric tests . 100
200 F.3.2 Temperature rise tests . 100
201 F.3.3 Short-time and peak withstand current tests (current transformers) . 101
202 F.3.4 Internal arc fault tests . 101
203 F.3.5 Multiple chopped impulse test . 102
204 Annex G (informative) Guidance for the calculation of equivalent diameter in case of
205 irregular shape of insulating part . 103
206 G.1 General . 103
207 G.2 Current transformers and earthed voltage transformers . 103
208 G.3 Unearthed voltage transformers . 104
209 Annex H (informative) Test circuits . 106
210 H.1 Test circuits for accuracy measurements in steady state for current
211 transformers with analogue secondary signal . 106
212 H.2 Test circuits for accuracy measurements in steady state for voltage
213 transformers with analogue secondary signal . 110
214 Annex I (informative) Graph explaining the accuracy requirements for multi-purpose
215 low-power current transformer . 114
216 Annex J (normative)  Seismic qualification of instrument transformers . 115
217 J.1 Scope . 115
218 J.2 Seismic conditions . 115
219 J.2.1 Time history . 115
220 J.2.2 Seismic severity of application . 115
221 J.2.3 Superelevation factor (k ) . 116
se
222 J.3 Seismic qualification information’s . 117
223 J.3.1 Qualification options . 117
224 J.3.2 General information provided by purchaser . 117
225 J.4 The qualification procedure . 117
226 J.4.1 Qualification by static calculation / dynamic analysis . 118
227 J.4.2 Qualification by test . 124
228 J.5 Validity of qualification . 126
229 Bibliography .
...