DIN EN 62428:2009 Electric power enginering - Modal components in three-phase a.c. systems - Quantities and transformations (IEC 62428:2008); German version EN 62428:2008
2009DIN EN 62428:2009-02 Electric power enginering - Modal components in three-phase a.c. systems - Quantities and transformations (IEC 62428:2008); German version EN 62428:2008
2009DIN EN 62428:2009 Electric power enginering - Modal components in three-phase a.c. systems - Quantities and transformations (IEC 62428:2008); German version EN 62428:2008