Abstract
Solid insulators are key components for DC power distribution on electrified vessels. If exposed to conductive contaminants, their electrical performance will be reduced, jeopardizing system reliability and personnel safety. In this work, 20 to 40 mm insulators from three vendors were voltage tested with and without salt water contamination. The breakdown strength was reduced from around 0.6-0.7 kV/mm under clean conditions to typically 0.1-0.2 kV/mm for insulators sprayed with salt water. The findings are relevant for designers as well as operators as this emphasizes the need for barriers and/or regular maintenance in exposed areas.