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BS EN 50708-1-1:2020:2021 Edition

BS EN 50708-1-1:2020:2021 Edition

$167.15

Power transformers. Additional European requirements – Common part. General requirements

Published By Publication Date Number of Pages
BSI 2021 36
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PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
3 Terms and definitions
12 4 Service condition
13 5 Ratings and general requirements
5.1 Rated power
5.2 Rated frequency
5.3 Energy performance
5.3.1 Energy performance requirements
5.3.2 Exclusion from energy performance requirements
14 5.3.3 Reference conditions
5.3.4 Technical documentation
15 6 Rating plate
7 Tolerances
7.1 Tolerance during factory acceptance tests
16 7.2 Tolerances for Market surveillance
8 Tests
8.1 General
8.2 Measurement of cooling consumption
9 Accessories and fittings
10 Capitalization of losses
17 11 Transformer overhaul
18 Annex A (normative)Peak efficiency calculation
A.1 Efficiency Index
A.2 Peak Efficiency Index
19 A.3 PEI calculation for transformers having more than two windings
21 Annex B (informative)Capitalization of losses
B.1 General Theory, Concept of Capitalization
B.2 Impact of capitalization values
22 B.3 Capitalization formula
B.3.1 General
B.3.2 Calculation of factor A
23 B.3.3 Calculation of factor B
25 B.3.4 Use of A and B for tender evaluation
26 B.3.5 Determination of factors A and B
28 Annex C (informative)A-deviations
29 Annex D (informative)Additional considerations related to energy performances
D.1 General
D.2 Autotransformers
D.3 Voltage and insulation level
D.4 More than two windings
D.5 Short-circuit impedance
D.6 Tapping range
30 D.7 Losses on taps different than rated tap
D.8 Separate phases
31 Annex E (informative)Transformer overhaul
E.1 General
E.1.1 Overview
E.1.2 Energy performance
E.1.3 Life expectancy
E.2 Classification of overhaul activities
E.2.1 Overview
32 E.2.2 Repair
E.2.3 Upgrade
E.2.4 Refurbishment
33 E.2.5 Retrofit
34 Annex ZZ (informative)Relationship between this European Standard and the ecodesign requirements of Commission Regulation (EU) No 548/2014 of 21 May 2014 and its amendment No 2019/1783 of 1 October 2019 on implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to small, medium and large power transformers aimed to be covered

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BS EN 50708-1-1:2020
$167.15