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BS EN IEC 61869-11:2018:2021 Edition

BS EN IEC 61869-11:2018:2021 Edition

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Instrument transformers – Additional requirements for low-power passive voltage transformers

Published By Publication Date Number of Pages
BSI 2021 48
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This part of IEC 61869 is a product standard and covers only additional requirements for low power passive voltage transformers (passive LPVT). The product standard for low-power passive voltage transformers is composed of IEC 61869-1, along with IEC 61869-6 and this document with specific requirements.

This document is applicable to newly manufactured low-power passive voltage transformers with analogue output having rated frequencies from 15 Hz to 100 Hz for use with electrical measuring instruments or electrical protective devices.

This document covers low-power passive voltage transformers used for measurement or protection and low-power passive voltage transformers used for both measurement and protection.

Low-power passive voltage transformers have analogue output only (for digital output or for technology using any kind of active electronic components refer to future IEC 61869-72). Such low-power passive voltage transformers can include the secondary signal cable (transmitting cable). The secondary voltage of the low-power passive voltage transformer is proportional to the primary voltage. Derivative output signals are not within the scope of this document.

PDF Catalog

PDF Pages PDF Title
2 undefined
16 English
CONTENTS
18 FOREWORD
21 INTRODUCTION
Figures
Figure 1101 ā€“ General block diagram of a single-phase low-powerpassive voltage transformer
22 1 Scope
2 Normative references
3 Terms and definitions
3.1 General definitions
24 3.2 Definitions related to dielectric ratings and voltages
3.4 Definitions related to accuracy
25 3.7 Index of abbreviations and symbols
26 5 Ratings
5.3 Rated insulation levels and voltages
5.5 Rated output
5.6 Rated accuracy class
27 Tables
Table 1101 ā€“ Limits of ratio error and phase error for measuring LPVT
28 Table 1102 ā€“ Limits of ratio error and phase error for protection and multipurpose LPVT
29 5.1101 Standard values of rated voltages
5.1102 Standard values of rated voltage factor FV
Table 1103 ā€“ Standard values of rated voltage factors
30 6 Design and construction
6.11 Electromagnetic compatibility (EMC)
6.13 Markings
Figure 1102 ā€“ Terminal markingsfor passive LPVT
31 6.601 Requirements for optical transmitting system and optical output link
6.602 Requirements for electrical transmitting system and electrical wires for output link
6.603 Signal-to-noise ratio
Table 1104 ā€“ Pin assignment for RJ45 connectors used in passive LPVT
32 6.604 Failure detection and maintenance announcement
6.605 Operability
6.606 Reliability and dependability
6.1101 Transient response requirements
6.1102 Voltage limitation device requirements
7 Tests
7.1 General
33 Table 10 ā€“ List of tests
34 7.2 Type tests
35 Table 1105 ā€“ Burden values for basic accuracy tests
36 Figure 1103 ā€“ RC-divider with external low-voltage part outside the main housing
37 7.3 Routine tests
Figure 1104 ā€“ Connection for voltage withstand test of the external low-voltage part of a divider
38 7.4 Special tests
40 601 Information to be given with enquiries, tenders and orders
601.1 Designation
Figure 1105 ā€“ Step response time of a passive LPVT
41 601.2 Dependability
Table 1106 ā€“ Designation of a passive LPVT
42 Annex 11A (normative) Tests for impact of electric field from other phases
11A.1 General
11A.2 Test setup
Figure 11A.1 ā€“ Test setup for LPVT used in air-insulated substations
43 11A.3 Test procedure
44 Annex 11B (informative) Designation of accuracy class when using corrected transformation ratio and ratio correction factor
11B.1 General
45 11B.2 Designation of accuracy class based on rated transformation ratio
11B.3 Designation of accuracy class based on individual ratio correction factor
Figure 11B.1 ā€“ Accuracy class designation improved, basedon individual ratio correction factor CFU
46 Annex 11C (informative) Types of divider principles covered by this part of IEC 61869
Figure 11C.1 ā€“ Divider principles
47 Bibliography

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BS EN IEC 61869-11:2018
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