This product page details the Siemens 3RV2 motor protection circuit breaker, a precision protection device engineered for very small motors in industrial control systems. Specifically designed for 0.12kW motors with a finely adjustable current range of 0.35-0.5A and a wide voltage rating of 220-690VAC, this DIN-rail mounted MPCB delivers reliable overload and short-circuit protection for sensitive three-phase motor circuits.
Overview of the Motor Protection Circuit Breaker
The Siemens 3RV2 motor protection circuit breaker provides essential protection for low-power motor applications. Because it combines both magnetic short-circuit protection and thermal overload protection in one compact unit, it offers a complete and space-efficient solution for safeguarding small motors against electrical faults and operational overloads.
Key Features and Technical Specifications
This MPCB is precision-engineered for low-current motor protection. Therefore, here are its essential characteristics:
- Motor Power: Rated for 0.12kW (very small motor applications)
- Current Range: Precisely adjustable 0.35-0.5A
- Voltage Rating: 220-690VAC for versatile three-phase systems
- Mounting: Standard 35mm DIN rail mounting
- Protection Functions: Integrated overload and short-circuit protection
- Tripping Class: Class 10 for rapid motor protection
- Design: Compact design for high-density panel layouts
- Standards: Compliant with IEC/EN 60947-2 and IEC/EN 60947-4-1
Typical Applications and Use Cases
The low-current capability of this motor protection circuit breaker makes it perfect for specific small motor applications. For example, it is ideally suited for:
- Small instrumentation and control fans
- Precision pump and metering pump motors
- Laboratory and analytical equipment motors
- Small actuator and positioning drive motors
- Ventilation dampers and louvre actuators
- Electronic enclosure cooling fan motors
- Low-power conveyor and transport system motors
For complete motor control assemblies, explore our selection of compatible Siemens contactors designed to create coordinated motor starter combinations.
Why Choose This Specific 3RV2 MPCB?
Selecting this particular Siemens 3RV2 motor protection circuit breaker provides crucial advantages for low-power motor circuits. Firstly, the exceptionally low adjustable current range (0.35-0.5A) allows for perfect matching to very small motors that standard protection devices cannot accurately protect. Secondly, the wide 220-690VAC voltage rating offers incredible application flexibility across different power systems without requiring device changes. Consequently, you achieve precise, reliable protection that prevents damage to sensitive small motors while ensuring continuous operation in critical applications.
Installation and Setting Guidelines
Correct installation and calibration of this motor protection circuit breaker are vital due to its sensitive rating. Mount securely on a 35mm DIN rail, ensuring all power connections are tight and correctly sized for the low current. Carefully set the current adjustment dial to the motor’s exact nameplate full-load current, paying close attention to the low amperage scale. Furthermore, always perform functional tests to verify that both the overload and short-circuit protections operate correctly within the specified parameters.
For detailed technical data and application notes, refer to the official Siemens 3RV2 technical documentation.
Secure Protection for Your Smallest Motors Today
In summary, this Siemens 3RV2 motor protection circuit breaker fills a critical need for protecting very low-power motors. Finally, by implementing this precision device, you ensure the longevity and reliability of your smallest motor-driven assets, preventing costly downtime and repairs in specialized industrial and control applications.
