circuit breaker 3VA2 IEC frame 160 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU350, LSI, In=160A overload protection Ir=63A…160A short-circuit protection Isd=1.5…10 x Ir, Ii=10 x In N conductor protection adjustable (OFF, 50%, 100%) nut keeper kit