circuit breaker 3VA2 IEC frame 1000 breaking capacity class M Icu=55kA @ 415V 3-pole, line protection ETU330, LIG, In=630A overload protection Ir=250A…630A short-circuit protection Ii=1.5…12 x In ground-fault protection Ig=0.2…1 x In, tg=0.1/0.3s nut keeper kit