circuit breaker 3VA2 IEC Frame 630 breaking capacity class C Icu=110 kA @ 415 V 3-pole, line protection ETU850, LSI, In=630 A overload protection Ir=252 A...630 A short-circuit protection Isd=0.6..10xIn, Ii=1.5..10xIn neutral conductor protection optionally with external current transformer; up to 160% nut keeper kit undervoltage release 208-230 V AC 50/60 Hz 1 auxiliary switch 1 trip alarm switch