Motor protection circuit breaker — SIRIUS 3RV2011-0GA15-ZW97
The Siemens SIRIUS 3RV2011-0GA15-ZW97 is a motor protection circuit breaker designed for protecting three-phase induction motors against overload, short-circuit, and phase failure. It carries a Trip Class 10 rating, meaning it will trip within 10 seconds at 7.2× the thermal setting — fast enough to protect standard IEC motors during a locked-rotor event without nuisance tripping on normal starts. The breaker mounts on 35 mm DIN rail per DIN EN 60715 via screw and snap-on fastening, and accepts any mounting position, which simplifies panel layout. Rated short-circuit breaking capacity reaches 100 kA at 400 V, 500 V, and 690 V, and also at 240 V — that is a high-fault rating for a 45 mm wide device, so it can be used as the main branch protector in a distribution panel without needing a separate upstream fuse for SCCR coordination, provided the available fault current stays under that level. Phase failure detection is built in, which is a standard requirement for motor protection in most industrial installations — if one phase drops out, the breaker will trip on the resulting current imbalance, preventing single-phasing damage to the motor winding.
DIN rail integration and clearances
The breaker occupies a 45 mm width on the DIN rail, with a depth of 97 mm and height of 97 mm. Required clearances around the device: 50 mm above and below, 30 mm at the sides, and zero clearance needed forwards or backwards — so it can be mounted flush against a backplate or enclosure wall. This is typical for SIRIUS 3RV2 breakers and matches the footprint of the standard 3RV2011 family, meaning a panel originally wired for a 3RV2011-0AA10 or 3RV2011-0BA20 will accept this unit without re-drilling or re-routing the DIN rail. Screw-type terminals on the main current circuit accept solid or stranded conductors: 2 × (0.5 … 1.5 mm²) or 2 × (0.75 … 2.5 mm²). The terminal screws are M3 size. Operating temperature range is -20 to +60 °C; storage and transport range is -50 to +80 °C.
Ratings and so-what
The auxiliary contacts (for signalling the breaker state) are rated 1 A at 24 V, 0.5 A at 120/125/230 V, and 0.15 A at 60 V. The main circuit short-circuit protection uses gL/gG fuses rated 6 A at 690 V. The maximum switching frequency in AC-3 duty (motor starting) is 15 operations per hour; the same limit applies for AC-3e duty. Power rating at 230 V is 0.1 kW. At 480 V and 600 V the rated operational current is 0.63 A — this is the continuous current the breaker can carry at those voltages without derating. For motor protection, the thermal setting range must be selected to match the motor full-load current; the breaker's own continuous rating must be at least that value.