circuit breaker 3VA2 IEC frame 160 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU550, LSI, In=25A overload protection Ir=10A…25A short-circuit protection Isd=0.6..10x In, Ii=1.5..12x In N conductor protection adjustable (OFF, up to 160%) clamp connection