Circuit-breaker vl 400 ul; type jg (cat no. njx3u400) non-interchangeable frame w. approbation circuit-breaker to ul489 standard switching capacity 3-pole, nema rating 35ka/480v, (molded case circuit breaker) overcurrent release etu, lsig tu= 40 degr. celsius 3 phases/4 cables in= 400a, rated current isd=1. 5 to 10 x ir, ii=11x in short-circuit protection ir= 150-400a overcurrent rel. f. plant protection w/o connection accessories