IEC 60633:1998+A1:2009 applies to terminology for high-voltage direct current (HVDC) systems and especially to HVDC converter substations where electronic converters are used for the conversion from a.c. to d.c. or vice versa.

This consolidated version consists of the second edition (1998) and its amendment 1 (2009). Therefore, no need to order amendments in addition to this publication.