circuit breaker 3VA1 IEC Frame 250 breaking capacity class M Icu=55 kA @ 415 V 3-pole, line protection TM240, ATAM, In=250 A overload protection Ir=175 A...250 A short-circuit protection Ii=5...10 x In nut keeper kit shunt trip left 208-277 V AC 50/60 Hz 4 auxiliary switches HQ