IEC 60146-1-3:1991

Foreword
1 Scope
2 Normative references
3 Rated values for convertor transformers
3.1 Rated current values
3.2 Temperature limits of cooling media
4 Losses and voltage drops in transformers and
     reactors
4.1 Losses in the transformer windings
4.2 Losses in interphase transformers, current
     balancing reactors, series-smoothing reactors,
     transductors and other current regulating
     accessories
4.3 Voltage drops in transformers and reactors
5 Tests for convertor transformers
5.1 Measurement of commutating reactance and
     determination of inductive voltage drop (type test)
5.2 Short-circuit test (type test and routine test)
5.3 Temperature rise test (type test)
Annex
A (normative) Corrections to be applied when cooling
      medium temperature is higher than standard
Tables
1 Temperature rise limits
2 Connections and calculation factors

Specifies characteristics wherein convertor transformers differ from ordinary power transformers. In all other respects, the rules specified in IEC 60076 shall apply.