Siemens 3RV2031-4WA10 SIRIUS Motor Protection Circuit Breaker
The Siemens 3RV2031-4WA10 is a motor protection circuit breaker from the SIRIUS 3RV2 series, designed to provide overload and short-circuit protection for AC motors. It combines a thermal overload release (adjustable) and a magnetic short-circuit release (fixed) in a compact frame. Rated operational current range is 22 A to 32 A, making it suitable for motors up to 15 kW at 400 VAC.
Electrical Specifications
Adjustable Overload Current Range: 22 – 32 A
Short-Circuit Trip Threshold: Fixed at 13 x Ir (approx. 416 A at max setting)
Rated Operational Voltage (Ue): 690 VAC 50/60 Hz
Breaking Capacity (Icu): 50 kA at 400 VAC according to IEC 60947-2
Utilization Category: AC-3 (direct starting of motors)
Number of Poles: 3 (three-phase)
Protection Functions
The thermal overload element provides class 10A trip characteristic (10 seconds at 7.2 x Ir), matching standard motor heating curves. Ambient temperature compensation ensures consistent tripping from -20°C to +60°C. The magnetic short-circuit release operates without intentional delay, protecting cables and contactors from high fault currents. A trip indicator window shows red when tripped.
Mechanical Features
The 3RV2031-4WA10 has a rotary handle with three positions: ON, OFF, and TRIPPED. It supports padlocking in the OFF position (up to 3 padlocks, shackle diameter 4-8 mm). The device accepts screw terminals for conductor cross-sections up to 35 mm² (copper). Electrical life: 10,000 operations; mechanical life: 50,000 operations. It can be mounted on a 35 mm DIN rail or via screws.
Compatibility and Accessories
The circuit breaker is compatible with SIRIUS 3RT2 contactors for direct motor starter combinations. Optional accessories include auxiliary contacts (3RV2901-1A, 3RV2901-1B), undervoltage release (3RV2903-1A), and shunt trip (3RV2902-1A). The device meets IEC 60947-1, IEC 60947-2, and IEC 60947-4-1 standards.
Applications and Environmental Data
Typical applications include conveyor motors, pumps, fans, compressors, and machine tools. Operating temperature: -20°C to +60°C; storage: -40°C to +80°C. Protection class IP20 (fingersafe). The device is rated for pollution degree 3 and altitude up to 2000 m without derating.
