The Siemens 3VA2612-5HM32-0KF0 is a 3-pole IEC frame 1250 circuit breaker from the 3VA2 series, configured for line protection with an ETU330 electronic trip unit featuring LIG protection — overload (L), short-circuit (I), and ground-fault (G). The breaking capacity class M delivers Icu=55kA at 415 V, with In=1250A continuous rating and overload protection adjustable Ir=500A...1250A.
Ground-fault and trip unit detail
The ETU330 LIG provides ground-fault protection adjustable Ig=0.2...1 x In with time delay tg=0.1/0.3s, which is critical for equipment protection and arc-flash mitigation on solidly-grounded or resistance-grounded systems. The short-circuit pickup Ii is adjustable 1.5...10 x In, giving flexibility to coordinate with downstream breakers or motor-starting inrush.
Integration notes
The 3VA2 frame 1250 mounts in a standard switchboard or panel via the nut keeper kit included. Verify the panel cutout and busbar spacing for the 1250A frame — this is a three-pole unit with a physical footprint larger than the 630A frame.