FprEN IEC 61869-13:2020

Instrument transformers - Part 13: Stand-alone merging unit (SAMU)

IEC 61869-13:2021 is a product standard and covers only additional requirements for stand-alone merging units (SAMUs) used for AC applications having rated frequencies from 15 Hz to 100 Hz. The digital output format specification is not covered by this document; it is standardized in IEC 61869-9 as an application of IEC 61850, which specifies the power utility communication architecture. This document covers SAMUs having standardized analogue inputs (for example: 1 A, 5 A, 3,25 V / √3 or 100 V / √3) provided by instrument transformers compliant with relevant product standards (e.g. IEC 61869-2 to IEC 61869-5, IEC 61869-7, IEC 61869-8, IEC 61869-10, IEC 61869-11, IEC 60044-1 to IEC 60044-6, IEC 60185, IEC 60186, IEEE C57.13), and aims to convert them to the digital output compliant with IEC 61869-9. Other input and output types are outside the scope of this document. Appropriate SAMU functionality can be combined with switchgear controller functionality defined in IEC 62271-3 or other IED functionality defined in IEC 60255 (all parts). Cyber security requirements are outside the scope of this document and are covered by the IEC 62351 series. IEC 61869-13:2021 is to be used in conjunction with IEC 61869-9:2016, Digital interface for instrument transformers, and IEC 61869­6:2016, Additional general requirements for low-power instrument transformers, which, in turn, are based on IEC 61869-1:2007, General requirements.

Messwandler - Teil 13: Unabhängige Merging Unit

Transformateurs de mesure - Partie 13: Concentrateur autonome (SAMU)

L'IEC 61869-13:2021 est une norme de produits et ne couvre que les exigences supplémentaires pour les concentrateurs autonomes (SAMU) utilisés pour les applications en courant continu avec une fréquence assignée comprise entre 15 Hz et 100 Hz. Le présent document ne spécifie pas le format de sortie numérique. Celui-ci est normalisé par l'IEC 61869-9, en tant qu'application de l'IEC 61850, qui spécifie l'architecture de communication des services publics d'électricité. Le présent document couvre les SAMU dont les entrées analogiques sont normalisées (par exemple: 1 A, 5 A, 3,25 V / √3 ou 100 V / √3), fournies par des transformateurs de mesures conformes aux normes de produits pertinentes (par exemple IEC 61869-2 à IEC 61869-5, IEC 61869-7, IEC 61869-8, IEC 61869-10, IEC 61869-11, IEC 60044-1 à IEC 60044-6, IEC 60185, IEC 60186, IEEE C57.13), et vise à les convertir en sortie numérique conforme à l'IEC 61869-9. Les autres types d'entrées et de sorties sont hors du domaine d'application du présent document. La fonctionnalité SAMU adaptée peut être combinée à un appareillage de commande de distribution, défini dans l'IEC 62271-3, ou à d'autres fonctionnalités d'IED définies dans l'IEC 60255 (toutes les parties). Les exigences en matière de cybersécurité sont hors du domaine d'application du présent document et sont couvertes par la série IEC 62351. L'IEC 61869-13:2021 doit être lue conjointement avec l'IEC 61869-9:2016, Interface numérique des transformateurs de mesure, et l'IEC 61869­6:2016, Exigences générales supplémentaires concernant les transformateurs de mesure de faible puissance, qui sont elles-mêmes fondées sur l'IEC 61869-1:2007, Exigences générales.

Instrumentni transformatorji - 13. del: Samostojni koncentrator (SAMU)

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 61869-13:2019
01-april-2019
Merilni transformatorji - 13. del: Samostojni koncentrator
Instrument Transformers - Part 13: Standalone Merging Unit
Ta slovenski standard je istoveten z: prEN IEC 61869-13:2019
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
oSIST prEN 61869-13:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 61869-13:2019
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oSIST prEN 61869-13:2019
38/599/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61869-13 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2019-01-18 2019-04-12
SUPERSEDES DOCUMENTS:
38/531/CDV,38/557/RVC
IEC TC 38 : INSTRUMENT TRANSFORMERS
SECRETARIAT: SECRETARY:
Italy Mr Filippo Frugoni
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 13,TC 57,TC 85,TC 95
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 13: Standalone Merging Unit
PROPOSED STABILITY DATE: 2022
NOTE FROM TC/SC OFFICERS:

Copyright © 2018 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.
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oSIST prEN 61869-13:2019
38/599/CDV – 2 – IEC CDV 61869-13 © IEC 2018
1 CONTENTS

3 FOREWORD ........................................................................................................................... 6

4 INTRODUCTION ..................................................................................................................... 9

5 1 Scope ............................................................................................................................ 10

6 2 Normative reference ...................................................................................................... 11

7 3 Terms and definitions .................................................................................................... 13

8 3.1 General terms and definitions ............................................................................... 13

9 3.2 Terms and definitions related to dielectric ratings and voltages ............................. 14

10 3.3 Terms and definitions related to current ratings .................................................... 14

11 3.4 Terms and definitions related to accuracy ............................................................. 15

12 3.7 Index of abbreviations and symbols ...................................................................... 16

13 4 Normal and special service conditions ........................................................................... 16

14 4.3 Special service conditions ..................................................................................... 16

15 4.3.3 Ambient temperature............................................................................................. 16

16 5 Ratings .......................................................................................................................... 16

17 5.3 Rated insulation levels .......................................................................................... 16

18 5.3.2 Rated primary terminal insulation level .................................................................. 16

19 5.3.3 Other requirements for primary terminal insulation ................................................ 16

20 5.3.4 Between-section insulation requirements .............................................................. 17

21 5.3.5 Insulation requirements for secondary terminals ................................................... 17

22 5.3.1301 Insulation requirements for SAMU inputs from instrument transformers ......... 17

23 5.5 Rated output ......................................................................................................... 17

24 5.6 Rated accuracy class ............................................................................................ 17

25 5.6.1301 Accuracy requirements for SAMU IT channels ............................................... 18

26 5.6.1301.1 Standard accuracy classes for SAMU current channels

27 measuring accuracy class designation .................................................................. 18

28 5.6.1301.2 SAMU current channels with protection accuracy class designation ................ 20

29 5.6.1301.3 Standard accuracy classes for SAMU current channels with protection

30 accuracy class designation ................................................................................... 21

31 5.6.1302 Standard accuracy classes for SAMU voltage channels ................................. 22

32 5.6.1303 SAMU inputs from current transformers ......................................................... 22

33 5.6.1304 SAMU inputs from voltage transformers ......................................................... 23

34 5.6.1305 SAMU settings ............................................................................................... 23

35 6 Design and construction ................................................................................................ 23

36 6.11 Electromagnetic compatibility (EMC) ..................................................................... 23

37 6.11.3 Requirements for immunity .................................................................................. 23

38 6.11.3.601 General ....................................................................................... 23

39 6.11.3.608 Electrical fast transient burst ....................................................... 25

40 6.11.3.609 Oscillatory wave immunity ........................................................... 25

41 6.11.3.1301 Voltage ripple on DC power supply ............................................................... 25

42 6.11.3.1302 Gradual shutdown and start-up test .............................................................. 25

43 6.11.4 Requirement for transmitted overvoltages ............................................................. 25

44 6.11.601 Emission requirements .................................................................................. 25

45 6.13 Markings ............................................................................................................... 25

46 6.13.1301 Terminal markings ...................................................................... 26

47 6.13.1302 Rating plate markings ................................................................. 26

48 6.13.1303 Marking durability ........................................................................ 29

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49 6.607 Vibrations ............................................................................................................. 29

50 7 Tests ............................................................................................................................. 30

51 7.1 General ................................................................................................................. 30

52 7.1.2 List of tests ........................................................................................................... 30

53 7.2 Type tests ............................................................................................................. 30

54 7.2.1 General ......................................................................................................... 30

55 7.2.2 Temperature-rise test .................................................................................... 31

56 7.2.3 Impulse voltage withstand test on primary terminals ...................................... 31

57 7.2.4 Wet test for outdoor type transformers ........................................................... 31

58 7.2.5 Electromagnetic compatibility tests ................................................................ 31

59 7.2.5.2.601 General ....................................................................................... 31

60 7.2.5.2.603 Harmonic and interharmonic disturbance test .............................. 31

61 7.2.5.2.604 Slow voltage variation test ............................................................................. 32

62 7.2.5.2.605 Voltage dips and short interruption test .......................................................... 32

63 7.2.5.2.606 Surge immunity test ....................................................................................... 32

64 7.2.5.2.607 Conducted immunity tests (150 kHz to 80 MHz) ............................................. 32

65 7.2.5.2.608 Conducted immunity tests (0 Hz to 150 kHz) .................................................. 32

66 7.2.5.2.609 Electronic fast transient/burst test .................................................................. 33

67 7.2.5.2.610 Damped oscillatory wave immunity test .......................................................... 33

68 7.2.5.2.611 Electrostatic discharge test ............................................................................ 33

69 7.2.5.2.612 Power-frequency magnetic field immunity test ................................................ 33

70 7.2.5.2.613 Pulse magnetic field immunity test ................................................................. 33

71 7.2.5.2.614 Damped oscillatory magnetic field immunity test ............................................ 33

72 7.2.5.2.615 Radiated, radiofrequency, electromagnetic field immunity test ....................... 33

73 7.2.5.2.1301 Voltage ripple on DC power supply .............................................................. 34

74 7.2.5.2.1302 Gradual shutdown ........................................................................................ 34

75 7.2.5.601 EMC emission tests ....................................................................................... 34

76 7.2.6 Test for accuracy ........................................................................................... 34

77 7.2.6.601 General ......................................................................................................... 34

78 7.2.6.1301 Test for error at limiting conditions for protection rated current channels ......... 35

79 7.2.6.1302 High-pass filter cut-off frequency measurement .............................................. 36

80 7.2.8 Enclosure tightness test at ambient temperature ............................................ 36

81 7.2.9 Pressure test for the enclosure ...................................................................... 36

82 7.2.601 Low-voltage component voltage withstand test .............................................. 36

83 7.2.601.2 Application of the test voltage ........................................................................... 36

84 7.2.601.3 Power-frequency voltage withstand test ............................................................ 37

85 7.2.601.4 Impulse voltage withstand test .......................................................................... 37

86 7.2.1301 Climatic environmental requirements ............................................................. 37

87 7.2.1301.1 Dry-heat test – Operational ............................................................................. 37

88 7.2.1301.2 Cold test – Operational ................................................................................... 38

89 7.2.1301.3 Dry-heat test at maximum storage temperature ............................................... 38

90 7.2.1301.4 Cold test at minimum storage temperature ...................................................... 38

91 7.2.1301.5 Damp-heat test ............................................................................................... 38

92 7.2.1301.6 Cyclic temperature with humidity ..................................................................... 38

93 7.2.1302 Mechanical tests ................................................................................................ 38

94 7.2.1302.1 Vibration ......................................................................................................... 38

95 7.2.1302.2 Shock ............................................................................................................. 38

96 7.2.1302.3 Bump .............................................................................................................. 38

97 7.2.1302.4 Seismic ........................................................................................................... 38

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98 7.3 Routine tests......................................................................................................... 38

99 7.3.1 Power-frequency voltage withstand test on primary terminals ........................ 38

100 7.3.2 Partial discharge measurement ...................................................................... 38

101 7.3.3 Power-frequency voltage withstand test between sections ............................. 39

102 7.3.4 Power-frequency voltage withstand test on secondary terminals .................... 39

103 7.3.5 Test for accuracy ........................................................................................... 39

104 7.3.6 Verification of markings ................................................................................. 39

105 7.3.601 Power-frequency voltage withstand test for low-voltage components ................... 39

106 7.4 Special tests ......................................................................................................... 39

107 7.4.601 Vibration tests ..................................................................................................... 39

108 7.4.601.1 Vibrations test for secondary parts .................................................................... 39

109 7.4.601.2 Vibration test for primary parts .......................................................................... 39

110 7.4.601.2.1 Vibration test for primary parts during short-time current ................................ 39

111 7.5 Sample tests ......................................................................................................... 39

112 8 Rules for transport, storage, erection, operation and maintenance ................................. 40

113 9 Safety ............................................................................................................................ 40

114 9.1301 General ................................................................................................................. 40

115 9.1302 Product safety requirements ................................................................................. 40

116 Annex 13A (informative) Measurement chain accuracy class considerations ........................ 41

117 Annex 13B (informative) Measurement examples of switching and lightning surge

118 voltage in gas-insulated switchgear ............................................................................... 43

119 Annex 13C (normative) Low power instrument transformer inputs ........................................ 54

120 13C.1 Introduction ........................................................................................................... 54

121 13C.2 Accuracy class ...................................................................................................... 54

122 13C.3 Rated input voltage ............................................................................................... 54

123 13C.4 LPIT input insulation requirements ........................................................................ 54

124 13C.5 LPIT input connectors ........................................................................................... 54

125 13C.6 LPIT Input impedance ........................................................................................... 55

126 13C.7 Input topology ....................................................................................................... 55

127 13C.8 Auxiliary power supply output ............................................................................... 55

128 13C.9 LPIT specific SAMU Settings ................................................................................ 55

129 13C.10 Testing ................................................................................................................. 56

130 Bibliography .......................................................................................................................... 57

131

132 Figure 1301 SAMU position in relation to other devices in the functional chain ....................... 9

133 Figure 1302 – Stand-alone merging unit (concept example) .................................................. 10

134 Figure 1303 – Stand-alone merging unit application example ................................................ 11

135 Figure 1304 – Specified input current time constant T .......................................................... 15

136 Figure 1305 – Dynamic range concept example .................................................................... 20

137 Figure 1306 – SAMU ports subjected to EMC tests ............................................................... 31

138 Figure 1307 – C-O-C-O duty cycle ........................................................................................ 35

139 Figure 13A.1 – SAMU application example ........................................................................... 41

140 Figure 13B.1 – constructional example of GIS with typical surge voltage sources ................. 43

141 Figure 13B.2 – Measured 550kV GIS construction ................................................................ 44

142 Figure 13B.3 – Measurement results showing a switching surge peak voltage

143 magnitude caused by the DS operation in Figure 13B.2 ........................................................ 45

144 Figure 13B.4 – Measured 275kV GIS construction ................................................................ 46

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145 Figure 13B.5 – Switching and lightning surge voltage waveforms .......................................... 47

146 Figure 13B.6 – Switching surge voltage measurement setup on a 550kV GIS

147 with/without an insulating flange surge absorber ................................................................... 48

148 Figure 13B.7 – Switching surge voltage measurement results when the DS was

149 operated with/without the surge absorber .............................................................................. 49

150 Figure 13B.8 – CT secondary circuit configuration for the 500 kV GIS .................................. 50

151 Figure 13B.9 – DS control circuit configuration for the 500 kV GIS test ................................. 50

152 Figure 13B.10 – Waveforms of switching surge voltage at measured point I (see Table

153 13B.3) ................................................................................................................................... 51

154 Figure 13B.11 – Block diagram of the electronic VT with amplifier tested in the 500 kV

155 GIS system ........................................................................................................................... 52

156 Figure 13B.12 – Lightning surge voltage as a function of surge absorbing capacitor

157 value..................................................................................................................................... 52

158 Figure 13B.13 – Lightning surge voltage as a function of coaxial cable length ...................... 53

159

160 Table 1301 – Insulation requirements for SAMU inputs ......................................................... 17

161 Table 1302 – Limits of current error and phase error for SAMU measuring accuracy

162 current channels ................................................................................................................... 19

163 Table 1303 – Limits of current errors for SAMU TPS class rated protection accuracy

164 current channels ................................................................................................................... 21

165 Table 1304 – Limits of voltage error and phase error for SAMU voltage channels ................. 22

166 Table 1305 – SAMU TCTR class settings .............................................................................. 23

167 Table 1306 – SAMU TVTR class settings .............................................................................. 23

168 Table 1307 – Immunity requirements and tests ..................................................................... 24

169 Table 1308 – Acceptance criteria for EMC immunity tests ..................................................... 25

170 Table 1309 – SAMU rating plate markings ............................................................................ 27

171 Table 1310 – Ratings exposed through IEC 61850-7-4 ......................................................... 29

172 Table 1311 – Mechanical vibration tests applied to the enclosure port .................................. 30

173 Table 10 – List of tests.......................................................................................................... 30

174 Table 13A.1 – Combined accuracy class table ...................................................................... 41

175 Table 13B.1 – Measurement results showing switching and lightning surge voltage

176 recorded for the setup in Figure 13B.4 .................................................................................. 46

177 Table 13B.2 – Measurement results of switching surge voltage on CT secondary circuit ....... 50

178 Table 13B.3 – Measurement results showing the switching surge voltage coupling to

179 the DS control circuit ............................................................................................................ 50

180 Table 13C1 – ITRat setting units ........................................................................................... 55

181
182
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183 INTERNATIONAL ELECTROTECHNICAL COMMISSION
184 ____________
185
186 INSTRUMENT TRANSFORMERS –
187
188 Part 13: Stand-alone merging unit (SAMU)
189
190 FOREWORD

191 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

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201 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

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212 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

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214 services carried out by independent certification bodies.

215 6) All users should ensure that they have the latest edition of this publication.

216 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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219 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

220 Publications.

221 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

222 indispensable for the correct application of this publication.

223 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

224 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

225 International Standard IEC 61869-13 has been prepared by IEC technical committee 38:

226 Instrument transformers.
227 The text of this standard is based on the following documents:
FDIS Report on voting
38/XX/FDIS 38/XX/RVD
228

229 Full information on the voting for the approval of this International Standard can be found in

230 the report on voting indicated in the above table.

231 This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

232 This standard is Part 13 of IEC 61869, published under the general title Instrument

233 transformers.
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234 This document contains specific requirements for a stand-alone merging units having a digital

235 output and is to be used with IEC 61869-9:2016, Digital Interface for instrument transformers,

236 and the relevant specific requirements standard for the instrument transformer concerned. It

237 is also to be read in conjunction with, and is based on, IEC 61869-6:2016, Additional General

238 requirements for low-power instrument transformers, which in turn is based on IEC 61869-

239 1:2007, General requirements.

240 This Part 13 follows the structure of IEC 61869-1:2007 and IEC 61869-6:2016 and

241 supplements or modifies its corresponding clauses.

242 When a particular subclause of Part 1 or Part 6 is not mentioned in this Part 13, that

243 subclause applies. When this standard states “addition”, “modification” or “replacement”, the

244 relevant text in Part 1 or Part 6 is to be adapted accordingly.

245 For additional clauses, subclauses, figures, tables, annexes or note, the following numbering

246 system is used:

247 – clauses, subclauses, tables, figures and notes that are numbered starting from 1301 are

248 additional to those in Part 1 and Part 6;
249 – additional annexes are lettered 13A, 13B, etc.

250 An overview of the planned set of standards at the date of publication of this document is

251 given below. The updated list of standards issued by IEC TC 38 is available at the website:

252 www.iec.ch
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38/599/CDV – 8 – IEC CDV 61869-13 © IEC 2018
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
61869-2 ADDITIONAL REQUIREMENTS FOR 60044-1
61869-1
CURRENT TRANSFORMERS
60044-6
GENERAL
REQUIREMENTS
61869-3 ADDITIONAL REQUIREMENTS FOR 60044-2
FOR
INDUCTIVE VOLTAGE TRANSFORMERS
INSTRUMENT
TRANSFORMERS
61869-4 ADDIT
...