circuit breaker 3VA6 UL Frame 250 breaking capacity class C 100 kA @ 480 V 3-pole, line protection ETU850, LSI, In=100 A overload protection Ir=40 A...100 A short-circuit protection Isd=0.6..10x In, Ii=1.5..12x In neutral conductor protection optionally with external current transformer, up to 160% without connection