circuit breaker 3VA1 IEC Frame 160 breaking capacity class M Icu=55 kA @ 415 V 4-pole, line protection TM210, FTFM, In=63 A overload protection Ir=63 A permanently set short-circuit protection Ii=10 x In neutral conductor protection 100% terminal connection undervoltage release 208-230 V AC 50/60 Hz