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Circuit-breaker vl 400x ul; type lg (cat no. nlx3b500) non-interchangeable frame w. approbation circuit-breaker to ul489 standard switching capacity 3-pole, nema rating 35ka/480v, (molded case circuit breaker) overcurrent release tm, li tu= 40 degr. celsius in= < 500a, rated current ii= 2500. . . 5000a short-circuit protection ir= 500a overcurrent release f. plant protection w/o connection accessories