circuit breaker 3VA6 UL Frame 250 breaking capacity class H 65 kA @ 480 V 4-pole, line protection ETU350, LSI, In=250 A overload protection Ir=100 A...250 A short-circuit protection Isd=1.5...10 x Ir, Ii=10 x In neutral conductor protection adjustable (OFF, 50%, 100%) without connection