The Siemens SIRIUS 3RV2917-1A is a three-phase busbar assembly with infeed on the left, designed to distribute power to two 3RV2 circuit breakers of Size S00 or S0. It's the power distribution backbone for a compact motor feeder group — think a pair of motor-protective breakers fed from a single supply point, common in control panels for conveyors, pumps, and small machine sections. Rated for 63 A continuous (thermal current) at up to 500 V AC, with a UL rating of 600 V AC, this busbar handles the full load of two S00/S0 breakers simultaneously. The 63 A figure is the busbar's own limit — it's not the sum of the breaker ratings, but the maximum current the copper path can carry before derating. The 110 mm width matches the footprint of two S00/S0 breakers side by side, and the 86.5 mm depth keeps it within typical enclosure depth limits.
Integration — What Connects and How
Designed specifically for the 3RV2 family of circuit breakers (Size S00 and S0). The busbar plugs directly into the breaker line-side terminals via the spring-loaded interface — no additional wiring between breakers. The left-side infeed accepts the supply cable or another busbar feeder; the busbar then distributes the three phases across both breaker positions. Clearance spaces: 10 mm upwards from the busbar body, zero clearance needed at the sides or rear. This is a tight-fit design — you can butt adjacent components against it side-to-side and back-to-back, which matters when packing breakers into a shallow enclosure. Ambient operating range of -20 to +60 °C, surge withstand rated at 6 kV. The 3-pole construction matches standard three-phase motor circuits. The spring-loaded terminal type accepts solid or ferruled stranded conductors — typical cross-sections for 63 A feeder circuits.