circuit breaker 3VA2 IEC frame 250 breaking capacity class M Icu=55kA @ 415V 3-pole, line protection ETU350, LSI, In=250A overload protection Ir=100A...250A short-circuit protection Isd=1.5...10 x Ir, Ii=10 x In nut keeper kit circuit breaker 3VA2 IEC frame 250 breaking capacity class M Icu=55kA @ 415V 3-pole, line protection ETU350, LSI, In=250A overload protection Ir=100A...250A short-circuit protection Isd=1.5...10 x Ir, UNIVERSAL RELEASE 24 V DC ACCESSORY FOR 3VA1 and 3VA20 up 1 AUXILIARY SWITCH CHANGEOVER H 1 TRIP ALARM SWITCH CHANGEOVER