Circuit-breaker vl 250 ul; type fg (cat no. nfx3x150) 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, lig tu= 40 degr. celsius 3 phases/4 cables in= 150a, rated current ii= 1. 25 to 11 x in, short-circuit protection ir= 60-150a overcurrent rel. f. plant protection w/o connection accessories w/o aux. release