IEC 61869-9:2016

IEC 61869-9 ®
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
colour
inside
Instrument transformers –
Part 9: Digital interface for instrument transformers

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IEC 61869-9 ®
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
colour
inside
Instrument transformers –
Part 9: Digital interface for instrument transformers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-3331-3

– 2 – IEC 61869-9:2016  IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 12
2 Normative references . 12
3 Terms and definitions . 13
3.5 Terms and definitions related to other ratings . 13
3.7 Index of abbreviations . 13
4 Normal and special service conditions . 14
5 Ratings . 14
5.6 Rated accuracy class . 14
5.901 Performance requirements . 15
6 Design and construction . 16
6.901 Technological boundaries . 16
6.901.1 Interface point . 16
6.901.2 Digital output interface . 16
6.901.3 Human-machine interface . 16
6.902 Electrical requirements . 17
6.902.1 Frequency response requirements . 17
6.902.2 Maximum processing delay time requirement . 17
6.903 Specification of the communications profile . 19
6.903.1 General . 19
6.903.2 Variants . 19
6.903.3 Digital output sample rates . 20
6.903.4 Logical devices . 21
6.903.5 Logical nodes LPHD . 21
6.903.6 Logical nodes LLN0 . 21
6.903.7 Logical nodes TCTR . 21
6.903.8 Logical nodes TVTR . 24
6.903.9 Quality . 25
6.903.10 Dataset(s) . 26
6.903.11 Multicast sampled value control block(s) . 27
6.903.12 Configuration of the merging unit . 27
6.903.13 Rated conformance classes . 28
6.904 Synchronization . 34
6.904.1 General . 34
6.904.2 Precision time protocol synchronization . 34
6.904.3 1PPS synchronization . 35
6.904.4 Sample value message SmpSynch attribute . 35
6.904.5 Holdover mode . 36
6.904.6 Free-running mode . 37
6.904.7 Time adjustments . 37
7 Tests . 38
7.2 Type tests . 38
7.2.6 Test for accuracy . 38
7.2.901 Digital output conformance tests . 38
7.2.902 Maximum processing delay time test . 38

7.2.903 Loss of synchronization tests . 39
7.2.904 1PPS test . 39
Annex 9A (informative) Dynamic range considerations . 40
Annex 9B (informative) Time synchronization and management example . 43
Annex 9C (informative) Example merging unit ICD file . 45
Annex 9D (informative) Test circuits for accuracy measurement . 56
Annex 9E (informative) Electronic nameplate . 59
Bibliography . 60

Figure 901 – General block diagram of an electronic LPIT with digital output . 8
Figure 902 – General illustration of the objects within a merging unit (example) . 9
Figure 903 – Electronic LPIT with digital output (concept example) . 10
Figure 904 – Standalone merging unit . 11
Figure 905 – Duplex LC connector . 16
Figure 906 – Maximum processing delay time . 17
Figure 907 – Output message timestamp point . 19
Figure 908 – TCTR naming example . 23
Figure 909 – 1PPS signal waveform at the merging unit clock input . 35
Figure 910 – Time adjustment example (6 ASDU example) . 37
Figure 9A.1 – Nomogram for current . 41
Figure 9A.2 – Nomogram for voltage . 42
Figure 9B.1 – Sampled value signal processing example showing 2ASDUs per
message (F4800S2I4U4 example) . 43
Figure 9D.1 – Example test circuit . 56
Figure 9D.2 – Example test circuit . 58

Table 901 – Maximum processing delay time limits . 18
Table 902 – Standard sample rates . 20
Table 903 – Extensions to the LPHD class . 21
Table 904 – AmpSv object attribute values . 23
Table 905 – Extensions to the TCTR class . 24
Table 906 – VolSv object attribute values . 25
Table 907 – Extensions to the TVTR class . 25
Table 908 – Configuration parameters of the merging unit . 28
Table 909 – Basic conformance statement . 29
Table 910 – ACSI models conformance statement . 29
Table 911 – ACSI service conformance statement . 31
Table 912 – PICS for A-Profile support . 33
Table 913 – PICS for T-Profile support . 34

– 4 – IEC 61869-9:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 9: Digital interface for instrument transformers

FOREWORD
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