circuit breaker VL400X UL; type LG (cat no. NLX3B500) non-interchangeable frame, with circuit breaker approval acc. to UL 489 standard breaking capacity 3-pole, NEMA rating 35kA/480V and 18kA/600V (molded case circuit breaker) trip unit TM, LI TA=40°C In=< 500A, rated current II=2500...5000A short-circuit protection IR=500A ETU for line protection without connection accessories without auxiliary release without auxiliary/alarm switch