For high-reliability motor status monitoring and load detection, the Functional Devices RIBXKF is a trade-standard solid-core current switch engineered for seamless integration into building automation systems. This fixed threshold current sensor triggers at 0.25 Amps, providing a reliable normally open (N/O) solid-state contact for HVAC proof of flow and belt-loss detection. Designed to handle a sensing range from .25-150Amp current, the RIBXKF eliminates the need for field calibrations, making it an ideal "go/no-go" solution for fractional and high-horsepower motors alike. The enclosed AC sensor features a compact housing that fits easily in tight junction boxes or motor starter enclosures, secured by a removable mounting tab or the integrated ratcheting wire clamp. With 16-inch 18 AWG wire leads rated for 600V, this RIB current sensor ensures a professional, high-voltage-safe installation for contractors monitoring fans, pumps, or industrial loads. Key Benefits for HVACR Contractors: Fixed 0.25A Trip Point: Simplifies setup by removing the need for manual sensitivity adjustments in the field. High Current Range: Monitors conductors carrying up to 150 Amps for versatile application across various motor sizes. Solid-Core Reliability: Offers a stable, long-term monitoring solution with no moving parts to fail in high-vibration environments. Internal Clamp Design: The ratcheting cam secures the sensor directly to the wire, preventing sliding or disconnection. Compact Footprint: Designed to save space within enclosures while providing pre-stripped wire leads for quick termination. Common Questions & Technical Insights: How does this sensor indicate motor failure or belt loss? The RIBXKF remains in an "open" state until the sensed current exceeds 0.25 Amps. If a belt breaks and the motor loses its load, the current drop—if below the threshold—will cause the switch to open, signaling the controller of a mechanical failure. Is this sensor compatible with Variable Frequency Drives (VFDs)? While the sensor can monitor loads powered by VFDs, it is best suited for constant-speed applications. For VFD-driven motors, ensure the operating frequency and current stay consistently above the fixed 0.25A trip point during runtime. Can I use this for both AC and DC monitoring? This specific model is an AC current sensor designed for 50/60 Hz circuits. It is not designed to sense DC current or non-sinusoidal waveforms outside of its rated specifications. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
