prEN IEC 61869-22:2025

SLOVENSKI STANDARD
01-julij-2025
Instrumentni transformatorji - 22. del: Instrumentni transformatorji v sklopu z
drugimi napravami z Um = 36 kV - Zahteve in preskusi
Instrument transformers - Part 22: Instrument transformers integrated with other devices
with Um = 36 kV - Requirements and tests
Transformateurs de mesure - Partie 22: Transformateurs de mesure intégrés à d’autres
appareils avec Um = 36 kv - Exigences et essais
Ta slovenski standard je istoveten z: prEN IEC 61869-22:2025
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

38/820/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61869-22 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-13 2025-09-05
SUPERSEDES DOCUMENTS:
38/802/CD, 38/806A/CC
IEC TC 38 : INSTRUMENT TRANSFORMERS
SECRETARIAT: SECRETARY:
Italy Mr Filippo Frugoni
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 17,TC 20,TC 32,SC 32A,TC 33,TC 36,SC 36A
ASPECTS CONCERNED:
Electricity transmission and distribution
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.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Part 22: Instrument transformers integrated with other devices with U ≤ 36 kV - Requirements and
m
tests
PROPOSED STABILITY DATE: 2031
NOTE FROM TC/SC OFFICERS:
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.

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1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 6
5 1 Scope . 7
6 2 Normative references . 7
7 2.1 Instrument transformers . 7
8 2.2 Fuses . 8
9 2.3 Insulators and bushings . 8
10 2.4 Cables . 8
11 3 Terms and definitions . 8
12 4 Normal and special service conditions . 9
13 5 Ratings . 9
14 6 Design and construction . 9
15 6.1 General . 9
16 6.2 Instrument transformers integrated in air insulated cable terminations . 9
17 6.3 Instrument transformers integrated in screened separable connectors for
18 cables . 10
19 6.4 Instrument transformers integrated in bushings . 10
20 6.5 Instrument transformers integrated in indoor air-post insulators . 10
21 6.6 Instrument transformers integrated in outdoor air-post insulators . 11
22 6.7 Voltage transformers with integrated fuses . 11
23 6.8 Voltage transformers with plug-in bushing primary terminals . 12
24 7 Tests . 13
25 7.1 General . 13
26 7.2 ITs integrated in terminations for extruded insulation cables . 13
27 7.2.1 General . 13
28 7.2.2 Tests for ITs integrated in terminations for extruded insulation cables . 13
29 7.2.3 Routine tests for ITs integrated in terminations for extruded insulation
30 cables . 15
31 7.3 ITs integrated in screened separable connectors for cables . 16
32 7.3.1 General . 16
33 7.3.2 Tests for ITs integrated in screened separable connectors for cables . 16
34 7.3.3 Routine tests for ITs integrated in screened separable connectors for
35 cables . 17
36 7.4 ITs integrated in bushings . 18
37 7.4.1 Tests for ITs integrated in bushings . 18
38 7.5 ITs integrated in indoor air-post insulators . 19
39 7.6 ITs integrated in outdoor air-post insulators . 21
40 7.7 Voltage Transformers with integrated fuses . 22
41 7.8 Voltage Transformers with plug-in bushing primary terminals . 22
42 Annex A (informative) List of additional tests to be in compliance with HD 629.1.S3 . 24
43 A.1 ITs embedded in terminations for extruded insulation cables. 24
44 A.2 ITs embedded in screened separable connectors for cables . 24
45 Bibliography . 25
IEC CDV 61869-22 © IEC 2025 – 3 –
47 Figure 1 – Examples of indoor and outdoor IT integrated in terminations for extruded
48 insulation cables . 9
49 Figure 2 – Example of ITs integrated in screened separable connectors for cables . 10
50 Figure 3 – ITs integrated in bushings . 10
51 Figure 4 – Example of ITs integrated into indoor air-post insulators . 11
52 Figure 5 – Example of ITs integrated into outdoor air-post insulators . 11
53 Figure 6 – Example of Inductive Voltage Transformers with integrated fuses . 12
54 Figure 7 – Example of Inductive Voltage Transformers with plug-in bushing primary
55 terminals . 12
56 Figure 8 – Example of Inductive Voltage Transformers with plug-in bushing primary
57 terminal and integrated fuse . 13
59 Table 1 – Tests for ITs integrated in terminations for extruded insulation cables . 14
60 Table 2 – Routine tests for ITs integrated in terminations for extruded insulation cables . 15
61 Table 3 – Tests for ITs integrated in screened separable connectors for cables . 16
62 Table 4 – Routine tests for ITs integrated in screened separable connectors for cables . 18
63 Table 5 – Tests for ITs integrated in bushings . 18
64 Table 6 – Tests for ITs integrated in indoor air-post insulators . 20
65 Table 7 – Tests for ITs integrated in outdoor air-post insulator . 21
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67 INTERNATIONAL ELECTROTECHNICAL COMMISSION
68 ____________
70 INSTRUMENT TRANSFORMERS
72 Part 22: Instrument transformers integrated with other devices
73 with U ≤ 36 kV - Requirements and tests
m
77 FOREWORD
78 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
79 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
80 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
81 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
82 Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
83 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
84 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
85 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
86 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
87 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
88 consensus of opinion on the relevant subjects since each technical committee has representation from all
89 interested IEC National Committees.
90 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
91 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
92 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
93 misinterpretation by any end user.
94 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
95 transparently to the maximum extent possible in their national and regional publications. Any divergence between
96 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
97 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
98 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
99 services carried out by independent certification bodies.
100 6) All users should ensure that they have the latest edition of this publication.
101 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
102 members of its technical committees and IEC National Committees for any personal injury, property damage or
103 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
104 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
105 Publications.
106 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
107 indispensable for the correct application of this publication.
108 9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
109 patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
110 respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
111 may be required to implement this document. However, implementers are cautioned that this may not represent
112 the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
113 shall not be held responsible for identifying any or all such patent rights.
114 IEC 61869-22 has been prepared by IEC technical committee 38: Instrument Transformers. It
115 is an International Standard.
116 The text of this International Standard is based on the following documents:
Draft Report on voting
XX/XX/FDIS XX/XX/RVD
118 Full information on the voting for its approval can be found in the report on voting indicated in
119 the above table.
IEC CDV 61869-22 © IEC 2025 – 5 –
120 The language used for the development of this International Standard is English.
121 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
122 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
123 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
124 described in greater detail at www.iec.ch/publications.
125 The committee has decided that the contents of this document will remain unchanged until the
126 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
127 specific document. At this date, the document will be
128 • reconfirmed,
129 • withdrawn,
130 • replaced by a revised edition, or
131 • amended.
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133 INTRODUCTION
134 Several components on the market are manufactured with instrument transformers integrated
135 with other components, as for example bushing, plug-in etc. These assembled components
136 refer to different product standards and sometime the related tests procedures are not the
137 same.
138 For those reasons the selection and execution of proper tests in not easy to be defined and
139 agreed, particularly when instrument transformers are embedded in other components
140 (therefore not separable).
141 This document proposes complete list of tests and aims to solve possible inconsistences
142 between similar test procedures that refer to different product standards.
143 Moreover, in this document particular attention is given to the compliance of the instrument
144 transformer’ accuracy class considering the characteristics of the other integrated components
145 and the use in operation.
146 Some pictures and photos of the typologies of instrument transformers integrated with other
147 components are given in the document for a clearer identification of the objects (those pictures
148 and photos will be improved in the next steps of the document).

IEC CDV 61869-22 © IEC 2025 – 7 –
149 INSTRUMENT TRANSFORMERS
151 Part 22: Instrument transformers integrated with other devices
152 with U ≤ 36 kV - Requirements and tests
m
155 1 Scope
156 This document establishes tests and acceptance criteria for instrument transformers integrated
157 with other devices.
158 This refers to the two main categories:
159 • IT with other devices integrated (for example: Medium Voltage VTs with integrated MV
160 fuses);
161 • IT integrated into other devices (for example ITs integrated into a bushings or cable
162 terminations).
163 The two above categories can be either separable or non-separable components (as example:
164 LPIT added on separable MV termination or embedded into bushing).
165 IT integrated with other devices shall not limit the main characteristics of the devices; in the
166 same way the IT main characteristics shall be preserved in the whole range of use of the
167 devices.
168 Some adjustment or tuning in the test procedures and acceptance criteria have been defined in
169 this standard for the new assembled product (as example, by adding additional accuracy
170 verification).
171 This document indicates solutions in case of conflicts between product standards.
172 For the scope of this document the voltage level considered is above 1000 VAC or 1500 VDC
173 up to U ≤ 36 kV.
m
174 The applicability of this standard for values of Um a little higher than 36 kV, as for example U m
175 40,5 kV available in other IEC standards, is under consideration.
176 NOTE For higher voltage levels it is necessary to make reference to relevant product standards where additional
177 tests are also prescribed
178 2 Normative references
179 The following documents are referred to in the text in such a way that some or all of their content
180 constitutes requirements of this document. For dated references, only the edition cited applies.
181 For undated references, the latest edition of the referenced document (including any
182 amendments) applies.
183 2.1 Instrument transformers
184 IEC 61869-1:2023, Instrument transformers – Part 1: General requirements
185 IEC 61869-2:2012 Instrument transformers – Part 2: Additional requirements for current
186 transformers.
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187 IEC 61869-3:2011 Instrument transformers – Part 3: Additional requirements for voltage
188 transformers.
189 IEC 61869-99:2022 Instrument transformers – Part 99: Glossary
190 IEC 61869-7:xxxx Instrument transformers – Part 7 Additional requirements for electronic
191 voltage transformers.
192 IEC 61869-8:xxxx Instrument transformers – Part 8 Additional requirements for electronic
193 current transformers.
194 IEC 61869-10:2017 Instrument transformers – Part 10 Additional requirement for low power
195 passive current transformers.
196 IEC 61869-11:2017 Instrument transformers – Part 11 Additional requirement for low power
197 passive voltage transformers.
198 2.2 Fuses
199 IEC 60282-1 High-voltage fuses - Part 1: Current-limiting fuses
200 2.3 Insulators and bushings
201 IEC 60137:2017 Insulated bushings for alternating voltages above 1 000 V
202 IEC 62217:2012 Polymeric HV insulators for indoor and outdoor use - General definitions, test
203 methods and acceptance criteria
204 IEC 60660:1999 Insulators - Tests on indoor post insulators of organic material for systems with
205 nominal voltages greater than 1 000 V up to but not including 300 kV
206 IEC 61109:2008: Insulators for overhead lines - Composite suspension and tension insulators
207 for AC systems with a nominal voltage greater than 1 000 V - Definitions, test methods and
208 acceptance criteria
209 2.4 Cables
210 IEC 60502-2:2014/AMD1:2024 Power cables with extruded insulation and their accessories for
211 rated voltages from 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) - Part 2: Cables for rated
m m
212 voltages from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
213 IEC 60502-4:2023 Power cables with extruded insulation and their accessories for rated
214 voltages from 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) - Part 4: Test requirements on
m m
215 accessories for cables with rated voltages from 6 kV (U = 7,2 kV) up to 30 kV (U = 36 kV)
m m
216 3 Terms and definitions
217 For the purposes of this document, the terms and definitions given in IEC 61869-99 and the
218 following apply.
219 ISO and IEC maintain terminology databases for use in standardization at the following
220 addresses:
221 • IEC Electropedia: available at https://www.electropedia.org/
222 • ISO Online browsing platform: available at https://www.iso.org/obp

IEC CDV 61869-22 © IEC 2025 – 9 –
224 3.1.1
225 Integrated Instrument Transformer
226 IIT
227 Instrument transformer assembled or combined with other device (cable accessory, power
228 transformer, insulator, etc.)
229 NOTE 1 to entry: The Integrated Instrument Transformer can be separable or not (embedded units) from the other
230 device/s.
231 4 Normal and special service conditions
232 Refer to the relevant product standards among those listed in clause 2.
233 5 Ratings
234 Refer to the relevant product standards among those listed in clause 2.
235 6 Design and construction
236 6.1 General
237 For the ITs integrated with other devices the main characteristics of both ITs and devices shall
238 not be limited due to their integration.
239 Each of IT and device follows the requirements of their relevant product standards and the main
240 characteristics shall be preserved in the whole range of operation.
241 This shall be taken into consideration in the design of an IIT and for all accessories embedded
242 with instrument transformers.
243 6.2 Instrument transformers integrated in air insulated cable terminations
244 This component is generally made by a cable termination for extruded insulation cable and a
245 LPCT or a LPVT, or both LPCT and LPVT.
246 The reference standards for this IIT are: IEC 60502-4, IEC 61869-10 and IEC 61869-11.
248 Figure 1 – Examples of indoor and outdoor IT integrated in terminations for extruded
249 insulation cables
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250 6.3 Instrument transformers integrated in screened separable connectors for cables
251 This component is generally made by a screened separable connector for cable and a LPCT or
252 a LPVT, or both LPCT and LPVT.
253 The reference standards for this IIT are IEC 60502-4, IEC 61869-10 and IEC 61869-11.
255 Figure 2 – Example of ITs integrated in screened separable connectors for cables
257 6.4 Instrument transformers integrated in bushings
258 The complete assembled component is generally composed by a bushing and a LPCT or a
259 LPVT, or both a LPCT and LPVT.
260 The reference standards for these components are IEC 60137, IEC 61869-10 and IEC 61869-
261 11.
263 Figure 3 – ITs integrated in bushings
265 6.5 Instrument transformers integrated in indoor air-post insulators
266 The complete assembled component is generally composed by an air post insulator and a LPCT
267 or a LPVT, or both a LPCT and LPVT.
268 The reference standards for these components are IEC 60660, IEC 61869-10 and IEC 61869-
269 11.
IEC CDV 61869-22 © IEC 2025 – 11 –
270 NOTE The most common application is LPVT integrated into air post insulator
272 Figure 4 – Example of ITs integrated into indoor air-post insulators
273 6.6 Instrument transformers integrated in outdoor air-post insulators
274 The complete assembled component is generally composed by an air post insulator and a LPCT
275 or a LPVT, or both a LPCT and LPVT.
276 The reference standards for these components are IEC 61109, IEC 61869-10 and IEC 61869-
277 11.
279 Figure 5 – Example of ITs integrated into outdoor air-post insulators
281 6.7 Voltage transformers with integrated fuses
282 These devices are generally manufactured as a voltage transformer and a fuse on the primary
283 side, becoming VT and fuse as the final product.
284 There are some possible options for how the fuse can be part of the voltage transformer.
285 • The fuse can be a direct part of the VT casted body and in that case the fuses are not
286 replaceable
287 • The fuse can be installed in a fuse holder which is an integral part of the VT with
288 replaceability option.
289 • The fuse can be installed in a separate fuse holder with a fuse which is additionally
290 assembled on the VT. In this case, there is an option to replace the blown fuse.

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291 There are several variants of fuses which can be considered for use with a voltage transformer.
292 These fuses can be pure current-limiting fuses with no additional functionality or fuses
293 additionally equipped with a striker pin, a feature providing information of the blown fuse.
294 The Voltage Transformer generally is an inductive voltage transformer in compliance with IEC
295 and IEC 61689-3, and the fuse is a current-limiting fuses in compliance with IEC 60282-1.
297 Figure 6 – Example of Inductive Voltage Transformers with integrated fuses
299 6.8 Voltage transformers with plug-in bushing primary terminals
300 These devices are generally manufactured with a voltage transformer and a plug-in integrated
301 on the primary side as a terminal/s.
302 The type of plug-in connection has to be in line with the intended application, purpose of use
303 and type of connection.
304 The Voltage Transformer generally is an inductive voltage transformer in compliance with IEC
305 and IEC 61689-3, and the plug-in follows their relevant prescriptions.
306 NOTE: example prescriptions for plug-in adopted for these kinds of solutions is given by the document EN 50181.
307 They can also be manufactured with the external part metal clad or metalized or coated.
309 Figure 7 – Example of Inductive Voltage Transformers with plug-in bushing primary
310 terminals
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