Disconnectors (DSC) for HVDC
applications are designed to specific constraints and
requirements typical for DC applications, that are quite
different compared to AC applications. They are requested to
withstand DC voltage open gap and to ground to ensure safety for
the people in the substation and to permit proper and safe layout
configuration. In some cases, like for filter applications, they
are requested to break a sum of harmonic currents at a certain
voltage (amply smaller than the rated voltage of the
disconnector) due to the ripple created by harmonics on the
reactances.
All these DC disconnectors take
benefit of huge experience and installed base of AC disconnector
technology delivered worldwide in regards to design technology
and quality e.g. supplier qualification, assembly processes or
ISO conformity.
