Neutral
Informational - no clear directional impact
Medium Impact
Significant progress or notable issue
In 1992, the original SACOI 1 mercury-arc HVDC converter system linking San Dalmazio in Tuscany with Codrongianos in Sardinia was decommissioned. The mercury-arc converters at both stations were taken out of service, the mercury was removed from the valves, and the link was subsequently replaced by new thyristor-based converter stations as part of the SACOI 2 upgrade, marking the end of SACOI 1’s operational life.