Ring Main Unit

We offer ring main unit. Rated short circuit closing current ka 50 rated short circuit (fuse) drop-out current ka 31.5 rated power load drop-out current a 630 4s heat stable current ka 20 rated dynamic stable current ka 50 1min power frequency withstand voltage kv 42 (fracture 48) lightning impulse withstand voltage kv 75 (fracture 85) mechanical lifetime time 2000 transfer current a