Motor-protection circuit breaker for panel integration
The Siemens SIRIUS 3RV1011-1GA10-ZW95 is a motor-protection circuit breaker designed to protect three-phase motors against overload and short-circuit. The interrupting capacity reaches 100 kA at both 240 V and 400 V, so it can be used on high-fault-capacity distribution without an upstream current-limiting fuse in many panel designs.
Screw-type terminals on the main circuit accept 2× (0.5 to 1.5 mm²) or 2× (0.75 to 2.5 mm²) solid or stranded copper.
Protection features and ratings
Built-in phase failure detection ensures the breaker trips if one phase drops out — a common cause of single-phasing motor damage. Ground fault detection is not included, so a separate ground-fault relay is needed if that function is required. Clearances: 20 mm above and below, 9 mm to the side, zero forward or backward — important for heat dissipation and arc-fault containment.