circuit breaker 3VA2 IEC Frame 160 breaking capacity class M Icu=55 kA @ 415 V 4-pole, line protection ETU350, LSI, In=63 A overload protection Ir=25 A...63 A short-circuit protection Isd=1.5...10 x Ir, Ii=12 x In neutral conductor protection adjustable (OFF, 100%) nut keeper kit