circuit breaker 3VA2 IEC Frame 1250 breaking capacity class H Icu=85 kA @ 415 V 3-pole, line protection ETU350, LSI, In=1250 A overload protection Ir=500 A ...1250 A short-circuit protection Isd=1.5... 10 x Ir, Ii=10 x In nut keeper kit undervoltage release 208-230 V AC 50/60 Hz 1 auxiliary switch HQ 1 trip alarm switch HQ