circuit breaker 3VA2 IEC Frame 1000 breaking capacity class M Icu=55 kA @ 415 V 3-pole, line protection ETU350, LSI, In=800 A overload protection Ir=320 A...800 A short-circuit protection Isd=1.5...10 x Ir, Ii=10 x In nut keeper kit circuit breaker 3VA2 IEC Frame 1000 breaking capacity class M Icu=55 kA @ 415 V shunt trip left 208-277 V AC 50/60 Hz 3 auxiliary switches HQ