Circuit-breaker vl 250 ul; type fg (cat no. hfx3u100) non-interchangeable frame w. approbation circuit-breaker to ul489 high switching capacity 3-pole, nema rating 65ka/480v, (molded case circuit breaker) overcurrent release etu, lsig tu= 40 degr. celsius 3 phases/4 cables in= 100a, rated current isd=1. 5 to 10 x ir, ii=11x in short-circuit protection ir= 40-100a overcurrent rel. f. plant protection w/o connection accessories