access. for circ. breaker 3WT8,main contact elements for 3WT8required for 3-pole 3 units,required for 4-pole 4 units, IU1250 and 1600A
access. for circ. breaker 3WT8,main contact elements for 3WT8required for 3-pole 3 units,required for 4-pole 4 units, IU1250 and 1600A