circuit breaker 3VA2 IEC frame 630 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU350, LSI, In=630A overload protection Ir=250A...630A short-circuit protection Isd=1.5...9x Ir, Ii=9x In N conductor protection adjustable (OFF, 50%, 100%) nut keeper kit circuit breaker 3VA2 IEC frame 630 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU350, LSI, In=630A overload protection UNDERVOLTAGE RELEASE 24 V DC ACCESSORY FOR 3VA1 and 3VA20 up 2 AUXILIARY SWITCH CHANGEOVER H 1 TRIP ALARM SWITCH CHANGEOVER