I.S. EN 61378-1:2011

FOREWORD
1 Scope
2 Normative references
3 Terms, definitions and acronyms
4 Classification
5 Ratings
6 Load loss and voltage drop in transformers
  and reactors
7 Tests for converter transformers
8 On load noise level with transductors
  and/or IPT
Annex A (informative) - Determination of transformer
        service load loss at rated non-sinusoidal
        converter current from measurements with
        rated transformer current of fundamental
        frequency
Annex B (informative) - Short-circuit test currents
        and load losses in transformers for single-way
        converters (total loss injection)
Annex C (informative) - Current sharing measurement
        in high current valve windings
Annex D (informative) - Examples of duty cycles
Annex E (informative) - Guidelines for design review
Annex F (informative) - Determination of loss in
        transformer tank due to magnetic field. 3D
        simulation and guidelines for tank losses
        evaluation and tank hotspot calculation
Annex G (informative) - Short-circuit measurements of
        rectifier transformers equipped with built in
        transductors
Annex H (informative) - Determination of the transformer
        voltage ratio and phase displacement by the
        turn ratio measurements
Annex I (informative) - Phase displacement connections
        and terminal indications of converter transformers
Annex J (normative) - Correlation between IEC 61378-1
        and IEC 60146-1-1 ratings
Bibliography
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Defines the specification, design and testing of power transformers and reactors which are intended for integration within semiconductor converter plants; it is not applicable to transformers designed for industrial or public distribution of a.c. power in general.