circuit breaker 3VA2 IEC Frame 630 breaking capacity class C Icu=110 kA @ 415 V 3-pole, line protection ETU350, LSI, In=630 A overload protection Ir=250 A...630 A short-circuit protection Isd=1.5...9 x Ir, Ii=9x In nut keeper kit undervoltage release (UVR) 120-127 V AC 50/60 Hz 2 auxiliary switches HQ