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BS EN 61869-3:2011:2012 Edition

BS EN 61869-3:2011:2012 Edition

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Instrument transformers – Additional requirements for inductive voltage transformers

Published By Publication Date Number of Pages
BSI 2012 34
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This part of IEC 61869 applies to new inductive voltage transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz.

NOTE 301 Requirements specific to three-phase voltage transformers are not included in this standard but, so far as they are relevant, the requirements in clauses 4 to 10 apply to these transformers and a few references to them are included in those clauses (e.g. see 3.1.303, 5.301.1, 5.301.2, 5.5.301, 6.13.301.1 and Table 304).

All the transformers shall be suitable for measuring purposes, but, in addition, certain types may be suitable for protection purposes. Transformers for the dual purpose of measurement and protection shall comply with all clauses of this standard.

PDF Catalog

PDF Pages PDF Title
7 English

CONTENTS
10 1
Scope
2 Normative references
3 Terms, definitions and abbreviations
3.1 General definitions
11 3.2 Definitions related to dielectric ratings
12 3.4 Definitions related to accuracy
3.5 Definitions related to other ratings
3.7 Index of abbreviations
13 5 Ratings
5.3 Rated insulation levels
5.5 Rated output
14 5.6 Rated accuracy class
Tables

Table 301 ā€“ Limits of voltage error and phase displacement formeasuring voltage transformers
15 Table 302 ā€“ Limits of voltage error and phase displacementfor protective voltage transformers
16 5.301 Standard values of rated voltages
17 5.302 Standard values of rated voltage factor
Table 303 ā€“ Rated voltages for secondary windings intendedto produce a residual voltage
18 6 Design and construction
6.4 Requirements for temperature rise of parts and components
6.13 Markings
19 Figures

Figure 301 ā€“ Single-phase transformerwith fully insulated terminalsand a single secondary
Figure 302 ā€“ Single-phase transformerwith a neutral primary terminal withreduced insulation and a single secondary
Figure 303 ā€“ Three-phase assembly with a single secondary
20 Figure 304 ā€“ Single-phase transformerwith two secondaries
Figure 305 ā€“ Three-phase assemblywith two secondaries
Figure 306 ā€“ Single-phase transformerwith one multi-tap secondary
Figure 307 ā€“ Three-phase assembly withone multi-tap secondary
21 Figure 308 ā€“ Single-phase transformer with two multi-tap secondaries
Figure 309 ā€“ Single-phase transformer withone residual voltage winding
Figure 310 ā€“ Three-phase transformer withone residual voltage winding
23 6.301 Short-circuit withstand capability
7 Tests
7.1 General
Figure 311 ā€“ Example of a typical rating plate
Figure 312 ā€“ Example of a rating plate with typical data
24 7.2 Type tests
Table 10 ā€“ List of tests
26 Table 305 ā€“ Burden ranges for accuracy tests
27 7.3 Routine tests
29 Figure 313 ā€“ Common mode (separate source) test voltage application
Figure 314 ā€“ Differential mode (induced) test voltage application ā€“ Primary excitation
30 7.4 Special tests
Figure 315 ā€“ Differential mode (induced) test voltage application ā€“ Secondary excitation

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BS EN 61869-3:2011
$167.15