Siemens 3VA2463-5KP32-0AA0 circuit breaker 3VA2 IEC frame 630 breaking capacity class M Icu=55kA @ 415V 3-pole, line protection ETU850, LSI, In=630A overload protection Ir=250A...630A short-circuit protection Isd=0.6..9x In, Ii=1.5..9x In N conductor prot