Circuit breaker 3VA2 IEC Frame 160 breaking capacity class M Icu=55 kA @ 415 V 3-pole, line protection ETU550, LSI, In=63 A overload protection Ir=25 A...63 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% terminal connection