circuit breaker 3VA1 IEC Frame 250 breaking capacity class M Icu=55 kA @ 415 V 3-pole, line protection TM240, ATAM, In=200 A overload protection Ir=140 A...200 A short-circuit protection Ii=5...10 x In nut keeper kit circuit breaker 3VA1 IEC Frame 250 breaking capacity class M Icu=55 kA @ 415 V undervoltage release 24 V DC 4 auxiliary switches HQ