circuit breaker 3VA2 IEC Frame 1000 breaking capacity class H Icu=85 kA @ 415 V 4-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 neutral conductor protection adjustable (OFF, 50%, 100%) nut keeper kit circuit breaker 3VA2 IEC Frame 1000 2 auxiliary switches HP