circuit breaker 3VA2 IEC frame 250 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU860, LSIG, In=250A overload protection Ir=100A…250A short-circuit protection Isd=0.6..10x In, Ii=1.5..10x In N conductor protection adjustable (OFF, up to 100%) gr.-fault prot., can be sw. off Ig=0.2…1 x In= tg=0.05-0.8s nut keeper kit