What this breaker is and what it does
The Siemens 3VA1463-6EF32-0AA0-ZD00 is a 3-pole IEC frame 630 circuit breaker from the 3VA1 series, rated for line protection with a TM240 thermal-magnetic trip unit. It carries a breaking capacity class H with Icu = 70 kA at 415 V AC, meaning it can safely interrupt fault currents up to that level without upstream coordination issues in a 415 V distribution panel. The overload protection is adjustable Ir = 440 A to 630 A, and the short-circuit protection is fixed at Ii = 4 to 8 x In, which gives the site electrical engineer flexibility to tune the trip curve for motor or feeder loads.