Circuit-breaker vl 400x ul; type lg (cat no. llx3p400) non-interchangeable frame w. approbation circuit-breaker to ul489 very high switching capacity 3-pole, nema rating 100ka/480v, (molded case circuit breaker) overcurrent release etu, lsi tu= 40 degr. celsius in= 400a, rated current isd=1. 5 to 10 x ir, ii=11 x in short-circuit protection ir= 150-400a overcurrent rel. f. plant protection w/o connection accessories