标准摘要
Applicable to direct d.c. semiconductor power convertors intended for service on rolling stock supplied with d.c. current. This standard has been drawn up for convertors supplying vehicle traction circuits, but it can be applied, in principle, to convertors for the supply to auxiliary services on these vehicles.
英文名称Power convertors for electric traction - Part 4: Direct d.c. convertors (d.c. chopper convertors) for rolling stock