circuit breaker 3VA2 IEC Frame 1250 breaking capacity class M Icu=55 kA @ 415 V 3-pole, line protection ETU860, LSIG, In=1250 A overload protection Ir=500 A ...1250 A short-circuit protection Isd=0.6..10x In, Ii=1.5..10x In neutral conductor protection optionally with ext. CT up to 160% ground-fault protection, can be switched off bus connectors broadened Ig=0.2... 1 x In, tg=0.05-0.8s shunt trip left 208-277 V AC 50/60 Hz