circuit breaker 3VA2 IEC Frame 630 breaking capacity class C Icu=110 kA @ 415 V 4-pole, line protection ETU320, LI, In=630 A overload protection Ir=250 A...630 A short-circuit protection Ii=1.5...9x In neutral conductor protection adjustable (OFF, 50%, 100%) nut keeper kit 2 auxiliary switches HP