EVS-EN 61378-1:2002

This international standard deals with the specification, design and testing of power
transformers and reactors which are intended for integration within semiconductor convertor plants; it is not applicable for transformers designed for industrial or public distribution of a.c. power in general.
The scope of this standard is limited to application of power converters, of any power rating, for local distribution, at moderate rated convertor voltage, generally for industrial applications and typically with a highest voltage for equipment not exceeding 36 kV.
The guarantees, service and type tests defined in this standard apply equally to transformers supplied as part of an overall converter package, or to those transformers ordered separately but for use with convertor equipment. Any supplementary guarantee or special verification has to be specifically agreed in the transformer contract.
The convertor transformers covered by this standard may be of the oil-immersed or dry-type design. Unless specific exceptions are stated in this standard, the transformers are required to comply with IEC 60076 for oil-immersed transformers, and with IEC 60726 for dry-type transformers.
EN 61378-1 is not applicable for railway applications.
This standard only deals with transformers with one active part and one interphase transformer. For several active parts in the same tank, an agreement between the purchaser and manufacturer is necessary regarding the determination and the measurement of the total losses.