Circuit-breaker vl 250 ul; type fg (cat no. nfx3p100) 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, lsi tu= 40 degr. celsius in= < 100a, rated current isd=1. 5 to 10 x ir, ii=11 x in short-circuit protection ir= 40-100 a overcurrent rel. f. plant protection w/o connection accessories w/o aux. release