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BS EN IEC 61869-13:2021

BS EN IEC 61869-13:2021

$215.11

Instrument transformers – Stand-alone merging unit (SAMU)

Published By Publication Date Number of Pages
BSI 2021 76
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
9 English
CONTENTS
11 FOREWORD
14 INTRODUCTION
Figures
Figure 1301 – Stand-alone merging unit (functional concept example)
Figure 1302 – Stand-alone merging unit application example
15 Figure 1303 – Illustration of the SAMU position in relationto other devices and standards in the functional chain
16 1 Scope
2 Normative references
18 3 Terms and definitions
20 Figure 1304 – Specified input current time constant TI
21 4 Normal and special service conditions
22 5 Ratings
23 Tables
Table 1301 – Insulation requirements for analogue inputs
24 Table 1302 – Measuring accuracy class 0,05
25 Table 1303 – Limits of current error and phase error forSAMU measuring accuracy current channels
26 Figure 1305 – Dynamic range concept example
27 Table 1304 – Limits of current errors for SAMU TPM class rated protection accuracy current channels
28 Table 1305 – Limits of voltage error and phase errorfor SAMU voltage channels
30 6 Design and construction
Table 1306 – SAMU TCTR class settings
Table 1307 – SAMU TVTR class settings
31 Table 1308 – Immunity requirements and tests
32 Table 1309 – Acceptance criteria for EMC immunity tests
34 Table 1310 – Radiated emissions tests
Table 1311 – Conducted emissions tests
35 Table 1312 – SAMU rating plate markings
39 7 Tests
Table 1313 – Ratings defined in accordance with IEC 61850-7-4
40 Table 10 – List of tests
41 Figure 604 (modified) – Examples of subassembly subjected to EMC tests –Usual structure used in HV AIS applications
45 Figure 1306 – Gradual shutdown – Startup test
46 Figure 1307 – C-O-C-O duty cycle
51 Table 1314 – Dry-heat test – Operational
Table 1315 – Cold test – Operational
52 Table 1316 – Dry-heat test at maximum storage temperature
Table 1317 – Cold test at minimum storage temperature
53 Table 1318 – Change of temperature (Cyclic temperature test)
54 Table 1319 – Damp heat steady state test
55 Table 1320 – Cyclic temperature with humidity test
56 8 Rules for transport, storage, erection, operation and maintenance
9 Safety
57 Annex 13A(informative)Measurement chain accuracy class considerations
Figure 13A.1 – SAMU application example
Table 13A.1 – Combined accuracy class table
59 Annex 13B(informative)Measurement examples of switching and lightningsurge voltage in gas-insulated switchgear
Figure 13B.1 – Constructional example of GIS with typical surge voltage sources
60 Figure 13B.2 – Measured 550 kV GIS construction
61 Figure 13B.3 – Measurement results showing a switching surge peak voltage magnitude caused by the DS operation in Figure 13B.2
62 Figure 13B.4 – Measured 275 kV GIS construction
Table 13B.1 – Measurement results showing switching and lightning surge voltage recorded for the setup in Figure 13B.4
63 Figure 13B.5 – Switching and lightning surge voltage waveforms
64 Figure 13B.6 – Switching surge voltage measurement setup on a 550 kV GIS with/without an insulating flange surge absorber
65 Figure 13B.7 – Switching surge voltage measurement results when the DS was operated with/without the surge absorber
66 Figure 13B.8 – CT secondary circuit configuration for the 500 kV GIS
Figure 13B.9 – DS control circuit configuration for the 500 kV GIS test
Table 13B.2 – Measurement results of switching surge voltage on CT secondary circuit
Table 13B.3 – Measurement results showing the switching surge voltage coupling to the DS control circuit
67 Figure 13B.10 – Waveforms of switching surge voltage at measured point I(see Table 13B.3)
68 Figure 13B.11 – Block diagram of the electronic VT with amplifier tested in the 500 kV GIS system
Figure 13B.12 – Lightning surge voltage as a function of surge absorbing capacitor value
69 Figure 13B.13 – Lightning surge voltage as a function of coaxial cable length
70 Annex 13C(normative)Low-power instrument transformer inputs
72 Table 13C.1 – ITRat setting units
Table 13C.2 – SAMU rating plate marking modifications
74 Bibliography

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